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Kohatsu, Lawrenne Ide. "Estudo radiográfico da relação entre os principais métodos de avaliação da idade óssea e dentária com a idade cronológica quando aplicados à leucodermas e xantodermas brasileiros /." São José dos Campos : [s.n.], 2008. http://hdl.handle.net/11449/105871.
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Orientador: Luiz Cesar de MoraesBanca: Edmundo Medici Filho
Banca: Estevão Tomomitsu Kimpara
Banca: Acácio Fuziy
Banca: Jorge Abrão
Resumo: O objetivo neste estudo é analisar e relacionar os principais métodos de avaliação da idade dentária e óssea com a idade cronológica em leucodermas e xantodermas brasileiros. Foram utilizadas 335 radiografias, sendo 193 de indivíduos do sexo feminino e 142 do sexo masculino, na faixa etária dos 5 aos 14 anos de idade. Os dentes 33, 34, 35, 37, 43, 44, 45 e 47, foram avaliados em radiografias panorâmicas por meio do método de Nicodemo et al.63 e 64 (1974 e 1992) e Nolla65 (1960). As vértebras cervicais C2, C3 e C4 foram examinadas em radiografias cefalométricas laterais pelo método de Hassel e Farman37 (1995). As análises foram realizadas por 2 examinadores, e após 1 mês todas radiografias foram reavaliadas. O teste Kappa foi utilizado na avaliação intraavaliador demonstrando reprodutibilidade dos métodos. Verificou-se simetria de desenvolvimento entre os dentes dos lados direito e esquerdo, adotando-se portanto, o lado esquerdo para as demais análises estatísticas. Na comparação da ID obtida pelo método de Nicodemo et al.63 e 64 (1974 e 1992), verificou-se diferença entre as avaliações, no entanto, na análise descritiva observamos diferenças de até 5 meses, não significativas clinicamente. Comparando-se IC com ID não se encontrou diferenças para o método de Nicodemo et al.63 (1974) para leucodermas e xantodermas do sexo feminino e Nicodemo et al.64 (1992) para leucodermas do sexo masculino. Não foram verificadas diferenças entre xantodermas e leucodermas na avaliação dos dados obtidos por todos os métodos. Houve correlação boa e estatisticamente significante entre ID e os IMVC e a IC
Abstract: The purpose of this study is to analyze and relate the main methods for assessment of dental and vertebral age with chronological age in caucasians and japaneses brazilians. Were used 335 radiographs, being 193 female and 142 male individuals, aged from 5 to 14 years. The teeth 33, 34, 35, 37, 43, 44, 45 and 47, were assessed in panoramic radiographs through the method of Nicodemo et al.63 and 64 (1974 and 1992) and Nolla65 (1960). The cervical vertebrae C2, C3 and C4 were examined in lateral cephalometric radiographs by means of Hassel and Farman37 (1995). The analyses were performed by 2 examiners, and after one month all radiographs were reviewed. The Kappa test was used in evaluating intra-evaluator demonstrating reproducibility of methods. There was symmetry between the teeth of right and left sides, the left side has taken up to the other statistical analyses. In comparing the ID obtained by the method of Nicodemo et al.63 and 64 (1974 and 1992), there was difference between the assessments, however, the descriptive analysis found differences of up to 5 months, not clinically significant. Compared to IC with ID is not found differences in the method of Nicodemo et al.63 (1974) to caucasians and japaneses females individuals and Nicodemo et al.64 (1992) for caucasian males. No differences were found between caucasian and japaneses in the evaluation of data obtained by all methods. There was good and statistically significant correlation between the ID and IMVC and IC
Doutor
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Kohatsu, Lawrenne Ide [UNESP]. "Estudo radiográfico da relação entre os principais métodos de avaliação da idade óssea e dentária com a idade cronológica quando aplicados à leucodermas e xantodermas brasileiros." Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/105871.
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O objetivo neste estudo é analisar e relacionar os principais métodos de avaliação da idade dentária e óssea com a idade cronológica em leucodermas e xantodermas brasileiros. Foram utilizadas 335 radiografias, sendo 193 de indivíduos do sexo feminino e 142 do sexo masculino, na faixa etária dos 5 aos 14 anos de idade. Os dentes 33, 34, 35, 37, 43, 44, 45 e 47, foram avaliados em radiografias panorâmicas por meio do método de Nicodemo et al.63 e 64 (1974 e 1992) e Nolla65 (1960). As vértebras cervicais C2, C3 e C4 foram examinadas em radiografias cefalométricas laterais pelo método de Hassel e Farman37 (1995). As análises foram realizadas por 2 examinadores, e após 1 mês todas radiografias foram reavaliadas. O teste Kappa foi utilizado na avaliação intraavaliador demonstrando reprodutibilidade dos métodos. Verificou-se simetria de desenvolvimento entre os dentes dos lados direito e esquerdo, adotando-se portanto, o lado esquerdo para as demais análises estatísticas. Na comparação da ID obtida pelo método de Nicodemo et al.63 e 64 (1974 e 1992), verificou-se diferença entre as avaliações, no entanto, na análise descritiva observamos diferenças de até 5 meses, não significativas clinicamente. Comparando-se IC com ID não se encontrou diferenças para o método de Nicodemo et al.63 (1974) para leucodermas e xantodermas do sexo feminino e Nicodemo et al.64 (1992) para leucodermas do sexo masculino. Não foram verificadas diferenças entre xantodermas e leucodermas na avaliação dos dados obtidos por todos os métodos. Houve correlação boa e estatisticamente significante entre ID e os IMVC e a IC
The purpose of this study is to analyze and relate the main methods for assessment of dental and vertebral age with chronological age in caucasians and japaneses brazilians. Were used 335 radiographs, being 193 female and 142 male individuals, aged from 5 to 14 years. The teeth 33, 34, 35, 37, 43, 44, 45 and 47, were assessed in panoramic radiographs through the method of Nicodemo et al.63 and 64 (1974 and 1992) and Nolla65 (1960). The cervical vertebrae C2, C3 and C4 were examined in lateral cephalometric radiographs by means of Hassel and Farman37 (1995). The analyses were performed by 2 examiners, and after one month all radiographs were reviewed. The Kappa test was used in evaluating intra-evaluator demonstrating reproducibility of methods. There was symmetry between the teeth of right and left sides, the left side has taken up to the other statistical analyses. In comparing the ID obtained by the method of Nicodemo et al.63 and 64 (1974 and 1992), there was difference between the assessments, however, the descriptive analysis found differences of up to 5 months, not clinically significant. Compared to IC with ID is not found differences in the method of Nicodemo et al.63 (1974) to caucasians and japaneses females individuals and Nicodemo et al.64 (1992) for caucasian males. No differences were found between caucasian and japaneses in the evaluation of data obtained by all methods. There was good and statistically significant correlation between the ID and IMVC and IC
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DUCHAMP, VALERIE. "Conduite a tenir devant un tassement vertebral isole chez le sujet age." Nice, 1992. http://www.theses.fr/1992NICE6529.
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McBride, David Glynn. "Longitudinal assessment of age-related change in the dental pulp chamber and age estimation using dental radiographs." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/4745.
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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on September 28, 2007) Vita. Includes bibliographical references.
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Sengupta, Anita. "Determination of dental age in archaeological material." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337070.
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Parekh, S. "Dental age assessment : developing standards for UK subjects." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1317781/.
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Dental Age Assessment (DAA) is used to estimate age when date of birth is uncertain. This thesis utilised radiographs archived at the Eastman Dental Hospital and King‟s College Dental Hospital. All teeth developing on the left side were assessed using an eight stage system (Demirjian 1973) and a twelve stage system (Haavikko 1970). The ages of attainment for each Tooth Development Stage (TDS) provided the Reference Data Set (RDS). Dental Age (DA) was calculated using weighted averages. DA estimates using the eight and twelve stage systems were compared, as were the effects of gender and ethnicity. The relative distal root canal widths (RCW) of the 1st, 2nd and 3rd permanent molars were assessed using a five category system designed by the investigator. In addition ossification of the sternoclavicular joint (SCJ) was also assessed using a five stage system (Schmeling 2004). The stages and the categories were related to age. The improvement obtained by combining DA, RCW and SCJ data was explored. A total of 2,622 subjects comprised the RDS with 45% male and 55% female, and an age range of 3 - 35 years. The main ethnic group was White (70%) followed by Black (13%), Mixed (5%) Asian (3%) and „not recorded‟ for 9% of subjects. The mean difference between DA & CA was -0.15 years (SD 1.3) for males and -0.14 years (SD 1.4) for females respectively using 12 stages, and -0.14 years for both genders using 8 stages. The greater ease of use of the 8 stage system makes it preferable for DAA. The combination of DA, SCJ & RCW showed that DA was the best predictor of an individual with teeth still developing. For subjects with no teeth still developing, SCJ can be used to estimate the age of an individual.
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Elgamri, Alya Isam Eldin Gafar. "A Comparison of the dental age estimation methods of Phillips and Proffit in a sample of South African children at the Tygerberg Dental Faculty." University of the Western Cape, 2015. http://hdl.handle.net/11394/5036.
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Magister Scientiae Dentium - MSc(Dent)Background: Dental age is an indicator of the physiological maturity of growing children. Different methods for estimating the dental age in comparison to the chronological age were proposed in the literature. Objective: The aim of this study was to compare the accuracy of two methods i.e. the Phillips and Proffit methods in estimating the dental age in a sample of South African children at the Tygerberg dental faculty. Methods: A retrospective study was conducted by randomly selecting 100 panoramic radiographs with known chronological age. The sample contained an equal number of girls and boys (50 in each group) and the chronological age ranged between 6 and 11 years. Dental age for each radiograph was estimated using the Phillips and the Proffit methods respectively. The mean difference between dental and chronological age was calculated. Dental and chronological ages were compared using overall bias and random errors. Results: The results showed that for the girls’ sample, the Phillips method underestimated the age by 4 months which is statistically significant (p-value =0.03). The Proffit method underestimated the age by 2 days which is not statistically significant (p-value =0.97). Both methods however have the same frequency of random errors. For the boys’ sample, Phillips’ method underestimated the age by 6 months which is statistically significant (p-value <0.0001). Proffit’s method underestimated the age by 2 months which is not statistically significant (p-value= 0.15). The Phillips method was shown to have fewer random errors in boys. Discussion: The above mentioned results showed that for dental age estimation for girls, Proffit’s method would be more appropriate. This rationale is explained by the conclusion that it only underestimates the age by 2 days and has the same frequency of random errors as Phillips’ method. However, if one had to choose between the two methods for boys, the situation should be evaluated carefully. For boys, the Phillips method has fewer random errors but a larger overall bias (6 months) whereas Proffit’s method has more random errors but less overall bias (2 months). The choice between the two methods should therefore depend on the purpose of the estimation. If the method is used for estimating the age in a single individual with an unknown chronological age, Phillips’ method would be more preferable. However, if the method is used for age estimation in populations with a known mean chronological age, Proffit is preferred. Conclusion: Proffit’s description for dental development has been shown to be accurate in estimating the DA. It may therefore be considered to be a legitimate DA estimation method and not just a developmental description for the dentition.
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Kaylor, Mary Beth. "Access to dental care for women of childbearing age." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1190144125.
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Kaylor, Mary. "Access to dental care for women of childbearingt age." The Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1190144125.
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Chu, Rene. "Age and Sex-Related Differences in Dental Pulp Stem Cells." Thesis, University of Iowa, 2013. https://ir.uiowa.edu/etd/4830.
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Objective: An in vitro study to determine the age and gender related changes of dental pulp stem cells in regards to proliferative capacity and lineage dependent effects on differentiation capabilities.
Material and Methods: Specimens have been collected from a population ranging from 16 yrs of age to 78 yrs of age. Intact, non-carious teeth were collected from the oral surgery department at College of Dentistry at the University of Iowa. A total of 20 specimens were collected. Teeth were collected, sectioned and pulpal tissue collected from the specimens. The pulpal tissue was cut and stored in phosphate buffered saline. The tissue was then subjected to enzymatic digestion and DPSC isolation. Subsequently cell cultures were grown, percentage of Stro-1+ cells and proliferation rate were measured. The DPSC were subjected to differentiation via osteogenic and adipogenic medium. The cells were assessed for osteogenic and adipogenic characteristics using RT- PCR and also replicative senescence using telomere length ratio measurement.
Results: Data suggests that with increasing age, there is a decreased proliferative capacity, decreased osteogenic capacity and shortened telomere length. There is no difference in the adipogenic potential and the percentage of DPSC present. There appears to be no difference in DPSCs in regards to proliferative capacity and differentiation potential with regards to gender. A possible gender related effect was noted in osteogenic potential and telomere length.
Conclusion: Increasing age has both a decreased proliferative effect and lineage dependent effects on DPSC differentiation potential. Thus this relationship must be accounted for when developing future regenerative therapies.
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Wilson, Sara E. (Sara Ellen). "Development of a model to predict the compressive forces on the spine associated with age-related vertebral fractures." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/11673.
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Cruz, Regina Cerqueira Wanderley. "Maturação das vértebras cervicais e desenvolvimento dentário em indivíduos de oito a quinze anos de idade." Programa de Pós- Graduação em Odontologia da UFBA, 2002. http://www.repositorio.ufba.br/ri/handle/ri/10517.
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Este estudo se propôs a avaliar a correlação entre os estágios de maturação das vértebras cervicais (C2, C3 e C4), de acordo com o método proposto por Lamparski (1972), modificado por Hassel e Farman (1995), e os estágios de desenvolvimento das unidades dentárias 43 e 47, segundo a classificação de Nolla (1960), considerando sexo e idade cronológica. Realizou-se um estudo de corte transversal com uma amostra de 252 pacientes, de ambos os sexos, nas faixas etárias entre 8 e 15 nos de idade, na cidade de Salvador - Bahia. As mudanças morfológicas das vértebras cervicais foram analisadas em telerradiografias laterais, e os estágios de desenvolvimento dental em radiografias panorâmicas. Foram aplicados testes estatísticos, aceitando-se um p valor < 0,05, como significativo. Os resultados mostraram que na medida em que a idade cronológica aumenta os estágios de maturação das vértebras cervicais também aumentam, sendo mais precoce nos pacientes do sexo feminino. Ficou comprovada uma correlação positiva entre os estágios de desenvolvimento dos dentes 43 e 47 e a idade cronológica, no entanto, não houve diferença significativa entre os pacientes do sexo feminino e masculino. A avaliação do grau de correlação entre as fases de maturação das vértebras cervicais e estágios de desenvolvimento dental, pelo Coeficiente de Correlação de Spearman, demonstrou uma correlação positiva e moderada, ou seja, a medida em que os estágios de maturação das vértebras cervicais progridem, os estágios de desenvolvimento dental, também 20 caminham para a maturidade de forma linear. Controlando o efeito da variável sexo, observou-se que essa variável tem pouca influência na correlação estudada. Porém, quando de associou a variável idade cronológica, o grau dessa correlação diminuiu muito. Ao controlar-se o efeito da idade cronológica e sexo, através do coeficiente de correlação parcial, reafirmou-se a fraca influência da variável sexo e o grande impacto da idade cronológica sobre a correlação entre as variáveis em estudo. Os resultados indicaram uma fraca correlação entre os estágios de maturação das vértebras cervicais e os estágios de desenvolvimento dental, quando controladas as variáveis sexo e idade cronológica. Com base nos dados obtidos nesse estudo pode-se verificar a dificuldade de se estabelecer uma correspondência entre a idade cronológica, maturação óssea e desenvolvimento dental. Assim sendo, é aconselhável somar o maior número de informações possíveis, para se obter uma idade biológica mais próxima da real.
Salvador
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Liversidge, Helen Mary. "Human tooth development in an archaeological population of known age." Thesis, University College London (University of London), 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318134.
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This thesis documents dental maturation in a mid C18, early C19 population where age at death is known (N=63, age range birth and 5.4 years). Emphasis is placed on the mineralization of individual deciduous and certain permanent teeth. In the first part of this thesis, the literature on dental maturation is reviewed with special reference to radiographic studies of populations, methodology and statistical analysis. Quantitative data on developing teeth, population differences and age estimation are also reviewed. In the second part of the thesis the Spitalfields material is described and used to investigate the accuracy of five types of age estimating methods that make use of the developing dentition. It emerges that the atlas method of Schour and Massler (1941) predicted age best. The third part of the thesis documents dental development in the Spitalfields Collection. New data for human deciduous anterior teeth and early stages of permanent anterior teeth are presented. In this study, few permanent anterior tooth crowns were complete before 5 years of age, contrary to published data from radiographic studies. Alveolar eruption of deciduous teeth and measurements of tooth length and weight are presented and discussed in context with published standards. The fourth part of this thesis is a preliminary investigation of cranial and postcranial development in this population. The fifth part is an appendix of data.
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Kirkland, Scott. "Dental Pathology at Promtin Tai: an Iron Age Cemetery from Central Thailand." NCSU, 2010. http://www.lib.ncsu.edu/theses/available/etd-04022010-113936/.
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The aim of this paper is to further understand the dental health of Thailand and Southeast Asia. An analysis of dental pathology frequencies were conducted using recently excavated remains from the Iron Age site of Promtin Tai in Thailand. Carious lesions, advanced attrition, antemortem tooth loss, and abscessing were scored and the frequencies were then compared to other sites within Thailand. Preliminary work suggests that the overall pathology rate at the Promtin Tai site is lower than other known sites within Thailand. The total caries rate of 0.5 percent at Promtin Tai represents a statistically significant difference in total caries rates between the coastal, central, and Khorat Plateau regions of Thailand. Because this is the first site in the central region to be analyzed for dental pathology, comparisons can only be made to sites of a similar time period from the Khorat Plateau (Eastern Thailand) and coastal Thailand. This new analysis may give insight about how the transition to rice agriculture affects the dentition. It also furthers the knowledge of dental health within Iron Age Thailand and Southeast Asia.
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Bonwell, Patricia Brown. "COHORT MEMBERSHIP, DENTAL INSURANCE AND UTILIZATION OF DENTAL SERVICES IN ADULTS AGE 47 AND OVER RECEIVING DENTAL CARE AT VIRGINIA COMMONWEALTH UNIVERSITY’S SCHOOL OF DENTISTRY." VCU Scholars Compass, 2012. http://scholarscompass.vcu.edu/etd/2823.
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This cross-sectional, non-experimental study evaluates associations between cohort membership, type of dental coverage, and utilization of dental services in all patients age 47 and over who received dental care at Virginia Commonwealth University’s (VCU) School of Dentistry in 2011. Structural Lag Theory poses that society’s institutions lag behind the actuality of a healthy and capable older adult population. The two dynamisms of the Structural Lag Theory were used for this study. The Dynamism of Changing Lives is represented by Cohort differences. Cohort differences include cohort size, people living longer and retaining more of their natural teeth along with different attitudes toward dental care. This dynamism impacts the Dynamism of Structural Change, represented by the institutions of dental coverage and utilization of dental services. Cohort membership is an independent variable. The dependent variable, utilization, is defined as Financial-Total amount spent and Procedural-Routine adult dental prophylaxis. Dental coverage, a dichotomous variable, is used as an independent and dependent variable. Descriptive statistics revealed employer provided dental coverage is the most prevalent type of dental coverage. However, when considered a payment source, out of pocket funding is the primary source of payment for dental services. Using Chi-square and logistic regression, examination of Cohorts (1-Greatest Generation, 2-Silent Generation, 3-Baby Boomer Generation) revealed that Cohort 2 had more dental coverage than Cohort 1, and Cohort 3 had more dental coverage than Cohort 2. Using logistic regression, Cohort 2 showed the highest level of Procedural utilization. Evaluating Financial utilization, multiple regression models showed Cohort 1 utilized more than Cohort 2 and Cohort 2 utilized more than Cohort 3. Those with dental coverage spend more on dental services, fees for routine adult dental prophylaxis make up the majority of the total amount spent, and those with dental coverage utilize more dental services when defined as total amount spent. Because they have experienced different social, political, economic, and technological changes at different times in their life course, the receipt of dental services by new cohorts of older people differs from previous ones. Findings from this study confirm that there is a structural lag in Medicare policy and its coverage of dental services.
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Andersson, Kerstin. "Oral health in old age : perceptions among elderly persons and medical professionals /." Stockholm, 2006. http://diss.kib.ki.se/2006/91-7140-816-9/.
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Silva, Ricarda Duarte da. "Fluorescência dental: possível aplicação forense." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/23/23153/tde-14012013-154740/.
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Nos casos de identificação de ossadas, segmentos do esqueleto ou ossos isolados, buscar o diagnóstico dos dados biotipológicos, como a idade do indivíduo, proporciona a possibilidade de estabelecer uma conexão com suspeitos desaparecidos. Em dentes naturais a fluorescência ocorre em dentina e também em esmalte, embora este apresente menor índice de fluorescência. É sabido que o esmalte, a dentina e polpa sofrem mudanças notáveis durante a vida do indivíduo. O esmalte torna-se mais mineralizado, liso e fino, sofre desgaste fisiológico e patológico o que pode causar áreas de exposição da dentina que altera a expressão cromática do dente natural. A polpa diminui em volume devido à deposição de dentina secundária, assim a dentina torna-se espessa com o tempo. Sendo o esmalte e a dentina responsáveis pelo fenômeno de fluorescência dental e estes elementos dentários sofrem alteração significativa durante a vida, sugere-se avaliar tal fenômeno sob a luz da odontologia legal com vista a desenvolver um método para se estimar a idade de um indivíduo. O presente estudo tem por propósito verificar a existência de correlação entre idade e alteração da fluorescência em dentes in vivo. A amostra foi constituída por 66 brasileiros, de ambos os gêneros, selecionados aleatoriamente. Os sujeitos de pesquisa se encontravam com idades entre 07 e 63 anos e foram divididos em 6 grupos: Grupo 1 07 a 12 anos; Grupo 2 - 13 a 20 anos; Grupo 3 21 a 30 anos; Grupo 4 31 a 40 anos; Grupo 5 41 a 50 anos e Grupo 6 51 a 63 anos. Foram incluídos na amostra os incisivos centrais superiores direito ou esquerdo livres de restaurações ou qualquer outro procedimento reabilitador ou estético nas regiões onde foi mensurada a fluorescência. Foi confeccionado um sistema de captura de imagem. A mensuração da fluorescência do dente foi realizada através da análise computacional das imagens digitais com o auxílio do software ScanWhite DMC / Darwin Systems - Brasil. A fluorescência dental decresce quando comparamos os grupos de faixa etária 21 a 30, 31 a 40, 41 a 50 e 51 a 63 anos, havendo diferença estatisticamente 8 significativa entre os grupos 41 a 50 anos e 21 a 30 anos (p=0,005) e também entre o grupo 51 a 63 anos e os demais grupos (p<0,05)). Pode-se concluir que a fluorescência dental está correlacionada com a idade e apresenta um comportamento semelhante e estável dos 7 aos 20 anos de idade, atinge seu valor máximo esperado na idade de 26,5 anos e a partir de então decresce. Através da análise do conjunto das variáveis estudas sugere-se tabela para auxiliar na identificação humana (Apêndice B).In cases of identification of bones, some segments of the skeleton or isolated bones fetch the diagnostic data Biotype as an estimated age of the individual providing the possibility of establishing a connection to suspects disappeared. The fluorescence in natural teeth occurs in dentin and enamel as well, although this presents a lower rate of fluorescence. It is known that the enamel, dentin and pulp undergo remarkable changes during the life of the individual. The enamel becomes more mineralized, smooth and thin, wears physiological and pathological which can cause areas of dentine exposure that alters the expression of the natural tooth color. The pulp volume decreases due to deposition of secondary dentin as the dentin becomes thicker with time. Therefore, if the enamel and dentin are responsible for the phenomenon of fluorescence dental and these dental elements suffer significant changes during life, now the phenomenon of fluorescence is investigated appropriately can provide us a method to estimate the age of an individual. The purpose of this study was to verify the correlation between age and change in dental fluorescence in vivo. The sample consists of 66 Brazilians, both gender, randomly selected. Research subjects should be aged between 13 and 63 years and will be divided into five groups: Group 1 - ages 07 - 12 years, Group 2 - ages 13-20 years, Group 3 - ages 21-30 years, Group 4 - ages 31 to 40 years and Group 5 - aged 41- 50 years and Group 6: aged 51-63 years. The upper central incisors right or left will be examined and shall be free of restorations or other rehabilitative or cosmetic procedure, which includes whitening teeth, cheeks where it will be measured fluorescence. Were included in the sample the upper central incisors right or left free of any restoration or rehabilitation or aesthetic procedure in the regions where the fluorescence was measured. A system of image capture was fabricated. The measurement of the fluorescence of the tooth was performed by computer analysis of digital images with the help of software ScanWhite DMC / Darwin Systems - Brazil. 10 The fluorescence decreases when comparing dental age groups 21-30,31-40,41-50 and 51-63 years, statistically significant difference between the groups 41-50 years and 21-30 years (p=0.005) and also between the group 51-63 years and the other groups (p<0.05). It can be concluded that the dental fluorescence correlates with the age and has a similar and stable behavior at the 7 to 20 years of age, reaches its maximum expected value of 26.5 years of age and thereafter decreases. Through the analysis of all variables studied suggest table to assist in human identification (Appendix B).
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Chance, Charles Allen. "Dependence of craniofacial growth on stages of cervical vertebral maturation and stages of mandibular canine mineralization." View the abstract Download the full-text PDF version, 2006. http://etd.utmem.edu/ABSTRACTS/2006-005-chance-index.htm.
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Thesis (M.S.)--University of Tennessee Health Science Center, 2006.Title from title page screen (viewed on October 8, 2007 ). Research advisor: Edward Harris, Ph.D. Document formatted into pages (xiii, 156 p. : ill.) Vita. Abstract. Includes bibliographical references (p. 137-147).
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Sindi, Amal M. "The reflective process among undergraduate dental students : the impact of age, gender, learning styles, learning approaches and the dental environment." Thesis, Queen Mary, University of London, 2011. http://qmro.qmul.ac.uk/xmlui/handle/123456789/683.
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Aim: To investigate the effect of age, gender, socioeconomic status, academic achievement, learning styles, learning approaches, and the learning environment on the reflective process. Methods: All dental undergraduate students studying at King AbdulAziz University Faculty of Dentistry (KAUFD) agreed to participate on three occasions of approximately six month intervals between February 2008 and June 2009 (QMREC2007/67). Four previously validated structured questionnaires including demographic details were used to determine students’ learning style (Felder and Soloman, http://www.ncsu.edu/felder-public/ILSpage.html [ILS]), approach to learning and studying (Entwistle, http://www.ed.ac.uk/etl [ALSI]), reflection (Sobral, 2005 [RLS]) and perception of their educational environment as determined by the Dundee Ready Educational Environment Method (Roff et al. 2005, [DREEM]). Multiple linear regression was used to investigate the independent effects on the questionnaires. Results: A total of 624 students (F=347, M=277) were included in the analysis. ILS assessed the undergraduate learning styles: 20.7% active learners, 47.9% sensing, 68.2% visual and 18.1% sequential learners. Sudents adopted different approaches simultaneously. The mean overall DREEM score was (112.76, SD19.54) indicating a more positive view of their environment. Fifty eight percent were ample in their ability to reflect. Females, older students, and from higher socioeconomic background reflect more. In the final student learning model, reflection was positively associated with a deep approach, organised/effort approach, academic self perception and perception of learning, whilst a surface approach was negatively associated with reflection. Students with higher academic achievement were able to 3 reflect and adopt an organised/effort approach, whilst students with lower grades had low reflective scores and adopt a surface approach. Conclusion: KAUFD dental students demonstrate sensing and visual learning styles. An effective learning environment that facilitates reflection results in the development of self directed learners. Self directed students take control over their own learning and are able to employ strategies such as a deep and organised approach to studying that can influence and optimise their learning and academic performance.
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Derfus, Stephanie J. "An analysis of preferred appointment confirmation methods as it correlates to patient age groups and its effect on dental recall appointment failures." Online version, 2009. http://www.uwstout.edu/lib/thesis/2009/2009derfuss.pdf.
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Kitching, Marilize Mabel. "Developing an age-appropriate dental care programme for preschool children / Marilize M. Kitching." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1078.
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Children's oral health is an important but often overlooked component of overall health. Tooth decay therefore remains a common phenomenon among children. It is however entirely preventable through early and sustained intervention. The aim of this research was to develop an age-appropriate programme to enhance children's knowledge and awareness of proper dental care. Action research was applied in this research, which was characterized by various cyclical research phases, including planning, reflecting and implementing. The initial phase of the research included a thorough literature investigation and a baseline assessment, consisting of a questionnaire which assessed preschool children's basic knowledge and awareness of proper dental care. Purposive sampling was used to select 52 Afrikaans-speaking children, between the ages of five and seven years, of different preschools. This age group was chosen because children in this developmental phase are at an age where their activity, curiosity and ability to construct a better system for understanding the world, are key to the process of development. The data obtained indicated a moderate level of knowledge and awareness among the participating children. The initial literature study and the baseline data informed the development of an age-appropriate dental care programme, according to Piaget's theory of cognitive development. The different developmental tasks of the identified age group were considered to be very important in the development of an age-appropriate programme and to teach children the basic aspects of proper dental care by using information and activities that are stimulating, creative and challenging. The programme focuses on basic aspects of proper dental care, including the healthy tooth, loss of primary teeth, the importance of primary teeth and development of permanent teeth, the process of tooth decay, diet, different ways of caring for teeth, and visiting the dentist. Parent involvement was also emphasized in the presentation of the programme. Specialist practitioners in the fields of developmental psychology and dentistry were asked to evaluate the newly developed programme. They were asked to focus on four specific areas, namely, general feedback on the questionnaire that was used for the initial baseline assessment, the overall appearance and presentation of the dental care programme, the relevance and appropriateness of the programme and its activities for the specific age group, and suggestions for further adjustments and improvements. Programme evaluation is an important part of the developmental process and contributes to the eventual appropriate and relevance of the intervention. The specialists' evaluation indicated that the programme appears to be a well-designed intervention that could contribute to enhancing preschool children's knowledge and awareness of proper dental care. Suggestions were made to adjust the programme in
certain areas to make it more appealing to children and to enhance its appropriateness and relevance. For example it was suggested that the language used in the programme be more consistent. More structure should be added to the programme manual to assist facilitators in presenting it. These suggestions were considered to be valuable in improving the efficacy of the age-appropriate programme and the adjustments were made.Thesis (M.A. (Psychology))--North-West University, Potchefstroom Campus, 2008.
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Jayaraman, Jayakumar. "Dental age assessment (DAA) : development and validation of reference dataset for southern Chinese and its application to East Asian populations." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/207191.
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Age assessment which is an integral part of forensic and clinical practice when assessed using the extent of dental development has proven to be more accurate than other methods. Variations in dental development have necessitated the construction of ethnic specific reference datasets (RDS) to ensure accurate age assessments. Age estimated from ethnically different RDS in southern Chinese subjects has been shown to be inaccurate. A systematic review and meta-analysis from the most commonly used French-Canadian dataset revealed consistent over-estimations of age of global population groups, inferring the need for population specific RDS. A study which compared a group of 400 five years old children born in the 1980s and the 2000s demonstrated that children born in recent decades have more advanced dental development. Hence, only the most recent samples were included in the construction of a RDS for southern Chinese using dental panoramic radiographs of 2306 subjects.
The reference dataset was subsequently validated on 484 subjects of southern Chinese origin by conducting dental age assessments (DAA) using un-weighted and weighted methods of dental age calculations. Paired t-test demonstrated that all methods of assessments were able to accurately estimate the age (p>0.05). The overall age differences ranged from -0.01 to 0.11 years for males and -0.03 to 0.10 years for females respectively. In addition, to test the accuracy of different ethnic datasets, 266 southern Chinese subjects for whom age had been estimated using the UK Caucasian and French-Canadian datasets were re-scored using the southern Chinese RDS. The latter was able to estimate the age of 80% of the subjects within a range of 12 months and the importance of population specific reference standards was elucidated. The validated southern Chinese RDS on dental development can thus be used to estimate the age of children and young adults of southern Chinese origin. This RDS was also tested for applicability on the records of 953 subject obtained from Japan, Thailand and Philippines. A similar method of validation was conducted and the southern Chinese RDS estimated the age of Thai males, Filipino and Japanese subjects with a reasonable degree of accuracy. The genetic similarity between the southern Han Chinese and the other East Asian population groups may account for the obtained accuracy.
The secular trend study was the first of its kind study in Asia that demonstrated advanced dental maturation in children born in recent decades. Natural calamities that strike East Asia leave thousands of people missing. In those circumstances, dental age assessment using the southern Chinese RDS would help in the process of identifying deceased victims. Furthermore, only half of the children in the world below the age of five years are registered; thus the need for determining age is of foremost importance to safeguard them against age specific crimes. Methods of establishing reference datasets and conducting accurate age assessments that have been investigated and tested in this study indicate that the methodology can be applied to any ethnic population group in the world.published_or_final_version
Paediatric Dentistry
Doctoral
Doctor of Philosophy
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Mahlangu, Simpiwe Margaret. "Testing of the Phillips dental age estimation tables on a sample of black children from Mpumalanaga, South Africa." University of the Western Cape, 2011. http://hdl.handle.net/11394/6469.
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Magister Scientiae Dentium - MSc(Dent)A number of dental age estimation methods have been developed over the years ranging from the frequently used age estimation of Demirjian et al (1973) and Moorrees et al (1965) to the less frequently used age estimation methods of Haavikko (1970) and Nolla (1960). Different dental age estimation methods have been used with variable success. These were developed using mainly children of Central and Northern European descent and white North Americans. The results of the above-mentioned dental age estimation methods, when used on South African children, show that the need for adaptation of these methods exists. Phillips has thus developed a dental age estimation table for Nguni children of South Africa, to assist in correcting this discrepancy. OBJECTIVE: To establish if the Phillips dental age estimation developed for Nguni children of South Africa is applicable to children in the region of Mpumalanga. METHOD: Cross sectional study using a stratified random sampling method involving 100 panoramic radiographs of black children up to the age of 14 years, in the region of Mpumalanga. CONCLUSION: This study will determine if Phillips dental age estimation tables developed for South African Nguni children is applicable and accurate in estimating the age of black Mpumalanga children.
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FitzGerald, Charles Michael. "Tooth crown formation and the variation of enamel microstructural growth markers in modern humans." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360038.
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Jayaraman, Jayakumar. "Dental age assessment of Southern Chinese using Demirjian's dataset and the United Kingdom dataset." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B45447767.
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Ghaname, Eduardo Silveira. "The effect of tooth age on the fracture toughness of four dental bonding systems." Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/32557.
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Objective: The purpose of this in vitro study was to evaluate the effect of dentin
age on the fracture toughness (Kic) of dental bonding systems using the notchless
triangular prism (NTP) specimen Kic test. Methods: 80 human molars and pre-molars,
40 of them from patients not older than 45 years ("young") and 40 from patients not
younger than 65 years ("old"), were wet ground on 600-grit silicon carbide abrasive
paper to obtain a 4x4x4x4mm triangular prisms with the labial surface exposed for
bonding. Within each of the two groups, the specimens were randomly assigned to four
subgroups (n=10) according to the bonding system to be used for composite bonding:
Adper Prompt L-pop (3M ESPE), Clearfil SE (Kuraray), Prime & Bond NT (Dentsply)
and Scotch Bond MP (3M ESPE). The composite, Z-100 (3M ESPE), was bonded to
each of the treated surfaces as per the manufacturer's instructions to obtain a 4x4x4x8mm
dentin-composite NTP specimens. The specimens were stored in water for 24h at 37°C
and tested to determine Kic. The data was analyzed using Levene's test for normality,
two-way univariate analysis of variance (ANOVA), and Bonferroni tests for multiple
means comparisons. A significance level of 0.05 was used for all tests. Results: While
Adper Prompt L-pop and Clearfil SE achieved the highest Kic values for both age groups,
Prime & Bond NT showed the lowest values. SEM observations of fractured samples
revealed differences in fracture path. No statistically significant differences were
observed between age groups. Conclusions: The Kic values of the four dental bonding
systems were not affected by age. Furthermore, statistically significant differences were
observed between the Kic values of the four bonding systems, regardless of the age of the
dentin.Dentistry, Faculty of
Graduate
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Dotson, Meryle Akeara. "Postnatal Dental Mineralization: a Comparative Analysis of Dental Development Among Contemporary Populations of the Southeastern United States." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3079.
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Due to the strong genetic component of dental development, research has shown that mineralization patterns of the human dentition are relatively buffered against environmental influences that normally affect bone growth and development. It is because of this resistance to environmental factors and the continuous growth of the permanent dentition throughout childhood and adolescence that the evaluation of dental development patterns has become the preferred method of age estimation in living and deceased children.
Researchers (Harris and Mckee 1990; Tompkins 1996; Blankenship et al. 2007; Kasper et al. 2009) have suggested that the timing of dental development varies by ancestral descent and geographic populations. However, further evaluations of these perceived differences in the timing of dental development among populations are necessary as classical statistical methods result in age estimations that are biased toward the age structure of the reference population. However, the Bayesian approach is beneficial since it incorporates relevant prior knowledge into the analysis and formalizes the relationship between assumptions and conclusions (Buck et al. 1996). Therefore, the purpose of this research is to incorporate methods in Bayesian analysis to compare the timing of dental development between two contemporary populations of the Southeastern United States, as well as test the accuracy of dental development age parameters devised by Moorrees et al. (1963) on a contemporary Florida Population.
For this study, 51 panoramic radiographs of individuals from a contemporary Florida population ranging in age from 7.7-20.4 years were reviewed. Statistical analyses incorporated a Bayesian approach to compare the timing of dental development for individuals comprising the contemporary Florida sample with the timing of dental development for a contemporary Middle Tennessee population by utilizing the age structure of the Middle Tennessee population as informed prior knowledge, otherwise referred to as an informed prior. Transition distributions for age, given stage of dental development, were also modeled for individuals comprising the contemporary Florida sample. The accurate observation and comparison of probability density distributions for age can serve as a noninvasive method for evaluating the probability of whether or not an unknown individual is a particular age, given the stage of dental development.
Results of this research indicate that there is a consistent underestimation of age for individuals comprising the contemporary Florida population when the age structure of the Middle Tennessee population is utilized as an informed prior. Additionally, the results of this thesis indicate that there is a consistent underestimation of age when utilizing age parameters of Moorrees et al. (1963) for the estimation of age for individuals from a contemporary Florida population. By incorporating a Bayesian approach to compare two contemporary populations of the Southeastern United States, a comprehensive analysis of the relationship between age and stage of dental development can be achieved. Therefore, the results of this thesis support Bayesian analysis as an appropriate method of evaluating perceived differences in the timing of dental development between contemporary populations. Furthermore, the results of this research are beneficial to the field of forensic anthropology as the observation of advanced stages of molar development utilizing panoramic radiographs serves as a noninvasive method in estimating age for unknown juveniles and young adults, and can also assist courts within the United States in determining whether or not an individual is legally considered a minor or an adult.
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Ling, Kit Tong, and 凌傑棠. "A cross-sectional study of skeletal age, dental age, body height, bodyweight and sexual maturity of 12 years old Southern Chinese boys." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B38628272.
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Stephen, Soni. "Dental age determination in South Australian children : thesis submitted in partial fulfillment of the requirements for the degree of Master of Dental Surgery /." Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09DM/09dms831.pdf.
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Walshaw, Sarah Catherine. "Reconstruction of environment in early Bronze Age Syria through phytolith analysis on human dental calculus." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ46995.pdf.
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Ling, Kit Tong. "A cross-sectional study of skeletal age, dental age, body height, body weight and sexual maturity of 12 years old Southern Chinese boys." Hong Kong : Department of Children's Dentistry and Orthodontics, University of Hong Kong, 1988. http://sunzi.lib.hku.hk/HKUTO/record/B38628272.
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Lee, Kwok-lun, and 李國綸. "The oral epidemiology of 45-64 year-old Chinese residents of a housingestate in Hong Kong: coronal and rootcaries." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B38628260.
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Fernandes, Camila Borges. "O impacto da presença/ausência dental na colonização de periodontopatógenos na cavidade bucal." Universidade de Taubaté, 2009. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=400.
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Objetivo: Avaliar o impacto da presença/ausência dental em relação a colonização de periodontopatógenos em recém-nascidos, crianças e adultos/idosos. Método: Estudo do tipo transversal, no qual foram incluídos 43 recém-nascidos (2,840,16 meses), quarenta crianças com dentição mista (9,331,99 anos) trinta adultos/idosos dentados (61,77,05 anos) e 31 adultos/idosos desdentados (60,068.67 anos). Avaliou-se por reação em cadeia da polimerase a presença de Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythia, Campylobacter rectus, Eikenella corrodens, Treponema denticola e Micromonas micros dos sítios extra-sulculares (dorso da língua e mucosa bucal) e intrasulculares (sulco / bolsa periodontal). As frequências bacterianas foram analisadas através do teste Qui-quadrado, e o risco da presença bacteriana em função do dente foi calculado com o auxílio do teste Odds Ratio. Resultados: C. rectus foi a bactéria de maior prevalência em todos os grupos avaliados. P. gingivalis não foi detectada em recém-nascidos ou em crianças, enquanto P. intermedia apenas não foi encontrada nos recém-nascidos. Os adultos/idosos desdentados, contrariamente aos recém-nascidos, apresentaram P. gingivalis em sítios extra-sulculares. Comparando as amostras extrasulculares conjutamente (dorso de lingual e mucosa bucal), o grupo de crianças apresentou maiores prevalências para todos os patógenos avaliados, em relação aos recém-nascidos. Já nos grupos de adultos/idosos estes apresentaram todas as bactérias examinadas, com diferença estatística para P. gingivalis, P. intermedia, T. forsythia, T. denticola e M. micros no grupo dentado (P<0,05). Conclusão: De forma geral, periodontopatógenos foram detectados tanto em indivíduos dentados quanto nos desdentados independentemente da idade. Apesar dos grupos dentados apresentarem maiores prevalências bacterianas, a presença dental não representou risco aumentado para a ocorrência bacteriana. Os resultados sugerem ainda que uma maior atenção profissional deve ser dispensada em relação aos indivíduos desdentados tanto na colonização bacteriana inicial da dentição decídua/mista quanto na colonização tardia relacionada ao planejamento dos implantes dentários.Aim: The aim of this study was evaluate the impact of teeths presence/absence according to the presence/absence of periodontal pathogens in newborns, children and adults/elderly. Methods: This cross-sectional estudy included 43 newborns (2.84 1.60 months), forty children with mixed dentition (9.33 1.99 years) thirty dentate adults/elderly (61.77.05 years) and 31 edentulous adults/elderly (60.068.67 years). The presence of Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Tannerella forsythia, Campylobacter rectus, Eikenella corrodens, Treponema denticola and Micromonas micros of extra-sulcus samples (dorsum of the tongue and cheek mucosa) and intra-sulcus samples (gingival sulcus/ periodontal pocket) were evaluated using polymerase chain reaction. Bacterial frequences were analized by Chi-square test, and the Odds Ratio for the presence of periodontal pathogens colonization according to the presence of the teeth in dentate population, was also calculated. Results: C. rectus was the more prevalent bacteria in all studied age-groups. P. gingivalis was not find in newborns and children, while P. intermedia was detected except in newborns. Edentulous adults/elderly, differently from newborns, showed P. gingivalis in extra-sulcus samples. When the extra-sulcus samples (dorsum of the tongue and cheek mucosa) were analized together, childrens group showed higher prevalences than newborns, for all studied pathogens. Both adults/elderly groups presented all bacteria, with statistical difference for P. gingivalis, P. intermedia, T. forsythia, T. denticola and M. micros in dentate group (P<0.05). Conclusions: In general, periodontal pathogens were detected in dentate and edentulous subjects, irrespective of the age. Despite dentate groups showed higher bacterial prevalences, the presence/absence of the teeth did not represent a risk for pathogens occurrence. The results also sugested that more professional attention must be taken to edentulous subjects for initial colonization of primary and mixed dentition and colonization ralated to subsequent oral implants.
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Uys, Andre. "A pilot study to assess dental age estimation in black South African children using Demirjian's method." Diss., University of Pretoria, 2011. http://hdl.handle.net/2263/27740.
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The age estimation method as described by Demirjian is the most frequently used tool to estimate the sub-adult dental age in forensic dentistry. This technique has been shown to over or under estimate the chronological age of sub-adults when applied to specific population groups. The aim of this study was to compare a black South African population sample with the original French-Canadian model to determine if Demirjian’s method accurately reflects the true chronological age of this population group. A sample of panoramic radiographs from 279 boys and 325 girls between the ages of 6 and 16 was obtained from the School of Dentistry University of Pretoria, and from orthodontists in private practice in the Pretoria region. The panoramic radiographs were used to score the seven left mandibular teeth. The calculated maturity score was used to determine the Demirjian dental age. All panoramic radiographs were scored by one examiner. A subset of 20 panoramic radiographs was scored by a second examiner and reliability tested using a Wilcoxon Matched Pairs Test. This research showed that black South African children have a more advanced dental age compared to French-Canadian children. Demirjian overestimated the age for boys by 0.8 years and for girls by 0.5 years. The dental age assessment provided by Demirjian is not suitable for black South African children. As a result, new standards of dental age assessment should be established for this population. CopyrightDissertation (MSc(Odont))--University of Pretoria, 2011.
Oral Pathology and Oral Biology
unrestricted
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Avila, Villalobos Marco Antonio. "Determinación del pico máximo de crecimiento puberal mandibular mediante la maduración ósea cérvico vertebral y la edad cronológica en pacientes adolescentes que acuden a la Clínica Dental Docente UPC : marzo 2011 - 2013." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2015. http://hdl.handle.net/10757/609514.
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Determinate the maximum peak of pubertal mandibular growth in a peruvian population through of chronological age and the cervical vertebrae maturation in patients between 8 to16 years of age, who received treatment in the Clinica Dental Docente UPC (Peruvian University of Applied Science), between 2011 - 2013.Materials and Methods: The study was observational, descriptive, cross-sectional, retrospective and used 137 cephalometric digital radiographs obtained from the data base program: SMILE® used in the Dental Clinic of UPC. These digital radiographs were of patients between 8-16 years, who attended the Dental Clinic for dental treatment, and were evaluated with the Method of Vertebral Cervical Maturation proposed by T. Baccetti in 2005. This method analysis the morphological characteristics of the bodies of the second, third and fourth cervical vertebra to determine the peak in mandibular growth. This method classifies six maturational stages, T1-T6. The digital cephalograms were analyzed by two calibrated examiners (Kappa = 0.7).
Results: Statistical analysis (Kruskal Wallis, p < 0.05) was conducted to evaluate the relationship between the chronological age and the appearance of the cervical vertebral maturation stage 3 and 4 to determining the peak of pubertal mandibular growth. In girls, the peak of mandibular growth occurred at the age 10.48 and in boys this occurred at the age of 11.21
Conclusions: The peak of pubertal mandibular growth occurred earlier in girls (10.48 years) than in boys (11.21years), having a difference of approximately one year between the two sexes.Objetivo: Determinar el pico máximo de crecimiento mandibular puberal en una población peruana a través de la edad cronológica y la maduración de las vértebras cervicales en pacientes de entre 8 a 16 años de edad, que recibieron tratamiento en la Clínica Dental Docente Universidad Peruana de Ciencias Aplicadas (UPC), entre 2011 - 2013. Materiales y métodos: El estudio fue de tipo observacional, descriptivo, transversal y retrospectivo donde se trabajó con 137 radiografías digitales cefalométricas de pacientes adolescentes entre 8 a 16 años de edad, obtenidas de la base de datos SMILE de la clínica dental docente UPC. Dichas radiografías fueron evaluadas por el método de maduración cérvico vertebral (MCV) propuesto por Tiziano Baccetti (2005) donde se observa la morfología de la segunda (C2), tercera (C3) y cuarta (C4) vértebra cervical, clasificándolas en 6 estadíos de maduración (T1-T6) de acuerdo a las características morfológicas de cada una. Las radiografías digitales fueron analizadas por 2 examinadores calibrados (KAPPA = 0.7). Resultados: Se realizó el análisis estadístico (Kruskall Wallis, p<0.05) para evaluar la relacione entre la edad cronológica con el estadío de maduración cérvico vertebral 3-4, con la finalidad de determinar el pico máximo de crecimiento mandibular puberal. En las mujeres el pico máximo de crecimiento ocurrió a los 10.48 años de edad y en los hombres ocurrió a los 11.21 años de edad. Conclusiones: El pico máximo de crecimiento mandibular puberal se produce primero en mujeres (10.48) antes que los hombres (11.21), existiendo una diferencia aproximada de un año entre ambos sexos.
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Pohjola, V. (Vesa). "Dental fear among adults in Finland." Doctoral thesis, University of Oulu, 2009. http://urn.fi/urn:isbn:9789514292385.
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Abstract The aim of this study was to evaluate the association between dental fear and dental attendance, oral health habits and dental condition. A further aim was to study the association between subjective oral impacts and dental fear. The nationwide two-stage stratified cluster sample (n=8028) represented Finnish adults aged 30 years and older. The data were collected in interviews, with questionnaires and at clinical dental examinations. Dental fear was measured with the question: “How afraid are you of visiting a dentist?” and subjective oral impacts with the OHIP-14 questionnaire. Multiple logistic regression analyses were used to determine the association between dental fear and dental attendance, oral health habits, dental condition and subjective oral impacts, taking into consideration the possible confounding and/or modifying factors (e.g. age, gender and education). Of Finnish adults aged 30 years and older, 10% were very afraid and 30% somewhat afraid of visiting a dentist. Those with high dental fear were more likely to report subjective oral impacts than were those with lower fear. Age modified the effect of the association between dental fear and dental attendance, oral health habits and dental condition. Among all age groups, except the 30- to 34-year-olds, irregular attenders were more likely to be very afraid of visiting a dentist than regular attenders were. Dental condition was also poorer among those with high dental fear than among those with lower fear. The association between dental fear and number of decayed teeth was positive in all age groups. Among the age group 65+ years, the numbers of missing and sound teeth were positively, and among the age group 30-34 years negatively, associated with dental fear. Among the age group 65+years, those who brushed their teeth less than twice a day were more likely to have high dental fear than were those who brushed at least twice a day. Regular smokers were more likely to have high dental fear than were those who smoked occasionally or not at all. Dental fear is very common among adults in Finland. Because those with dental fear use dental services irregularly, they are likely to need emergency care. However, those for whom oral health services have been provided regularly since childhood seem to continue to use these services regularly in spite of high dental fear. Dental teams should be aware of the increased oral health risks that smoking, irregular attendance and poor tooth-cleaning habits cause among those with dental fear. Treating dental fear could have positive effects on subjective oral impacts by reducing psychological and social stress as well as improving regular dental attendance and oral health. Birth cohort or age should be taken into account when associations between dental fear and dental attendance, oral health habits and dental condition are studiedTiivistelmä Tutkimuksen tarkoituksena oli selvittää hammashoitopelon ja hammashoitopalveluiden käytön, suunterveyteen liittyvien tapojen sekä hammasterveyden välisiä yhteyksiä. Tavoitteena oli myös tutkia suunterveyteen liittyvien ongelmien yhteyttä hammashoitopelkoon. Kaksivaiheinen ryvästetty otos (n=8028) edusti suomalaista 30 vuotta täyttänyttä väestöä. Tutkimuksessa käytetty tieto koottiin haastattelujen, kyselyjen ja suun kliinisen tutkimuksen avulla. Hammashoitopelkoa selvitettiin kysymyksellä ”Onko hammaslääkärissä käynti mielestänne: ei lainkaan pelottavaa, jonkin verran pelottavaa, erittäin pelottavaa?” ja suun terveyteen liittyviä ongelmia OHIP-14-kyselyllä. Logististen regressioanalyysien avulla tutkittiin hammashoitopelon ja palveluiden käytön, suunterveyteen liittyvien tapojen ja ongelmien sekä hampaiden terveyden välistä yhteyttä huomioiden mahdollisia sekoittavia ja/tai vaikutusta muovaavia tekijöitä (mm. ikä, sukupuoli, koulutus). Suomalaisista aikuisista 10 % pelkäsi hammashoitoa kovasti ja 30 % jonkin verran. Kovasti hammashoitoa pelkäävät raportoivat suunterveyteen liittyviä ongelmia useammin kuin vähän tai ei lainkaan pelkäävät. Ikä vaikutti siihen, millainen yhteys oli hammashoitopelon ja hammashoitopalvelujen käytön, suun terveyteen liittyvien tapojen ja hammasterveyden välillä. Kaikissa muissa ikäryhmissä paitsi ikäryhmässä 30–34 epäsäännöllisesti hoidossa käyvät pelkäsivät hammashoitoa todennäköisemmin kuin säännöllisesti hoidossa käyvät. Kovasti pelkäävillä oli myös huonompi hammasterveys kuin vähemmän pelkäävillä. Kaikissa ikäryhmissä kovasti hammashoitoa pelkäävillä oli useampia reikiintyneitä hampaita kuin jonkin verran tai ei lainkaan pelkäävillä. Poistettujen hampaiden lukumäärän lisääntyessä kovan hammashoitopelon todennäköisyys pieneni ikäryhmässä 30–34 ja kasvoi ikäryhmässä 65+. Näissä ikäryhmissä sama ilmiö oli havaittavissa myös terveiden hampaiden lukumäärän muuttuessa. Ikäryhmässä 65+ hampaansa harvemmin kuin kahdesti päivässä harjanneet pelkäsivät hoitoa todennäköisemmin kuin vähintään kahdesti päivässä harjanneet. Säännöllisesti tupakoivat pelkäsivät hammashoitoa todennäköisemmin kuin epäsäännöllisesti tai ei lainkaan tupakoivat. Hammashoitopelko on yleistä Suomessa. Koska pelkäävät käyvät hoidossa epäsäännöllisesti, hammaslääkärit kohtaavat pelkääviä potilaita usein akuuttivastaanotolla. Ne, jotka ovat tottuneet hammashoitopalveluiden säännölliseen käyttöön lapsuudesta alkaen, näyttävät jatkavan palveluiden säännöllistä käyttöä pelosta huolimatta. Hammashoitotiimien tulee huomioida hammashoitoa pelkäävien epäsäännöllisen hoidossa käymisen, puutteellisten kotihoitotottumusten ja tupakoinnin suunterveydelle aiheuttama kohonnut riski. Hammashoitopelon hoitamisella olisi positiivisia vaikutuksia suunterveyteen liittyvään elämänlaatuun, koska pelon hoito vähentää psykologista ja sosiaalista stressiä, lisää säännöllistä hoidossa käyntiä ja parantaa suun terveyttä. Syntymäkohortti tai ikä pitää huomioida tutkittaessa hammashoitopelon yhteyttä hammashoitopalveluiden käyttöön, suunterveyteen liittyviin tapoihin ja hammasterveyteen
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Zhang, Min H. "The Effect of Change in Medi-Cal Dental Coverage on Dental Care Utilization Among Medi-Cal Beneficiaries." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/6045.
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One of the most important factors in accessing dental care is having dental insurance. For people with low incomes, Medicaid is the main source of health insurance. Medi-Cal is California’s Medicaid program. Adult dental services were mostly eliminated in Medi-Cal in 2009 due to the economic downturn and partially restored in 2014. The objective of this study is to evaluate the effect of change in Medi-Cal dental coverage, specifically the partial restoration of adult dental coverage in 2014, on dental care utilization among Medi-Cal beneficiaries. The partial restoration significantly increased the utilization rates in dental clinics from 2014 to 2017 (22% in 2017 vs. 12% in 2013) for the overall population. However, the magnitude of increase differs in different age groups and ethnic groups. More statistically significant findings show greater utilization rates among beneficiaries of 19-64 than 65-74 and 75+ years old. Also, more significant findings show lower utilization among Black than White, Hispanic or Asian beneficiaries. The partial restoration significantly reduced the dental related ER visits among Medi-Cal beneficiaries from 2015 to 2017. However, the reduction is largely seen in beneficiaries of 19-64 years old in the ethnic groups of White and Black with reductions of 20 and 15 visits per 1,000 enrollees respectively in 2017 comparing to 2013. The dental related ER visits were lower for Hispanics and Asians, and remained very low among those 65 years old and above. In addition, the partial restoration resulted in increases in participation of dental care providers in the Medi-Cal program.
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Azevedo, Alana de Cassia Silva. "Estimativa de idade por meio da avaliação do desenvolvimento dentário e ósseo em jovens brasileiros." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/23/23153/tde-04032017-113115/.
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A estimativa de idade em indivíduos vivos representa um desafio com significativa importância nos âmbitos civil e penal. O estudo de estruturas do corpo humano para estimar a idade cronológica norteia-se na avaliação dos acontecimentos que transcorrem durante os processos de crescimento e desenvolvimento, uma vez que, comumente, apresentam uma sequência lógica e constante. A literatura mundial sugere uma abordagem multifatorial para o processo de estimativa da idade em indivíduos vivos, ou seja, a avaliação do desenvolvimento de mais de um local anatômico. Nessa perspectiva, os objetivos da primeira fase do estudo consistiram em validar o método de estimativa de idade por meio dos índices radiográficos oro-cervicais em brasileiros, além de verificar a relação entre idade real e idade estimada com a aplicação dos índices radiográficos. Na segunda etapa, objetivou-se verificar a efetividade das equações de estimativa de idade pelo exame dos dentes elaboradas por Chaillet e Demirjian (2004) e as equações para estimar a idade pelo exame das vértebras cervicais apresentadas por Caldas et al. (2007a). Por fim, o último objetivo foi elaborar novas equações para estimativa da idade real associando dados dentários e medidas cervicais dos métodos anteriores. A amostra avaliada foi composta por radiografias panorâmicas e telerradiografias pertencentes a 510 indivíduos com idades entre 08 e 24,9 anos. Durante a primeira fase da pesquisa, foram aplicados métodos de estimativa de idade por meio da avaliação do desenvolvimento de sete dentes mandibulares, vértebras cervicais e terceiros molares. Logo após, as técnicas aplicadas previamente foram combinadas por meio dos índices radiográficos: o escore radiográfico oro-cervical simplificado (EROCS) e o escore radiográfico oro-cervical simplificado sem o terceiro molar (EROCSSTM). No decorrer da segunda fase, avaliou-se a maturação dentária, atribuiu-se a pontuação referente a cada dente e a idade real foi estimada por meio de equações de regressão de Chaillet e Demirjian (2004). Em relação às vértebras cervicais, foram realizadas medidas dos corpos vertebrais e os valores substituídos nas fórmulas propostas por Caldas et al. (2007a). Os achados do estudo indicaram que entre os escores radiográficos, o EROCS apresentou taxa de acerto geral igual a 67,4% e uma relação moderada com a idade cronológica, sendo o coeficiente de determinação (R2) equivalente a 0,64; para o EROCSSTM a taxa de acerto correspondeu a 70,8% e R2 igual a 0,62. Ao aplicar a metodologia de Chaillet e Demirjian (2004) para os dentes, o erro médio foi igual a 1,3 anos, e o método de Caldas et al. (2007a) para as vértebras cervicais obteve um erro médio de 1,9 anos. As variáveis dentárias e as medidas das cervicais foram associadas e novas equações de regressão foram desenvolvidas para a amostra de brasileiros, apresentando um erro médio igual a 1,0 ano. Por fim, tem-se que os índices radiográficos oro-cervicais foram de fácil execução após um treinamento adequado, reprodutíveis e passíveis de utilização na prática forense. Além disso, recomenda-se o uso das novas equações elaboradas neste estudo ao associar dados das vértebras cervicais com informações do desenvolvimento dentário para obtenção de estimativas de idade com maior acurácia.The age estimation in living subjects is a challenge with significant importance in civil and criminal areas. The study of human body structures to estimate the chronological age is guided by the evaluation of events which happens during the processes of growth and development, since they have a constant and logic sequence. The worldwide literature has suggested a multifactorial approach to age estimation in living subjects which is the evaluation of development of more than one anatomical location. In this sense, the objectives of the first phase of the study consisted in validate the age estimation method through oro-cervical radiographic indexes in Brazilians and identify the relationship between real age and estimated age with application of radiographic indexes. The second phase of study aimed to verify the effectiveness of age estimation equations proposed by Chaillet and Demirjian (2004) through dental exams, and evaluated Caldas et al. (2007a) age estimation equations using cervical vertebrae. The last aim was to develop new equations for estimating the real age associating dental data and cervical measures of previous methods. The sample comprised panoramic radiographs and teleradiography belonging to 510 subjects, aged 08 to 24.9 years old. During the first phase of the research, age estimation methods were applied by assessing the development of seven mandibular teeth, cervical vertebrae and third molars. Then, the techniques used previously have been combined by radiographic indexes: the Oro-Cervical Radiographic Simplified Score (OCRSS) and Oro-Cervical Radiographic Simplified Score without Wisdom Teeth (OCRSSWWT). During the second phase, evaluated the dental maturation, assigned the score to each tooth and the real age was estimated by regression equations of Chaillet and Demirjian (2004). Regarding the cervical vertebrae, measurements were made of vertebral bodies and the values were used in formulas proposed by Caldas et al. (2007a). The findings of study show that between radiographic scores, the OCRSS presented a positive rate of 67.4% and a moderate relationship with chronological age with a coefficient of determination (R2) equivalent to 0.64; for EROCSSTM the hit rate was 70.8% and R2 of 0.62. Chaillet and Demirjian\'s technique was applied for dental age estimation, which showed an average error of 1.3 years and the method of Caldas et al. (2007a) was applied for cervical vertebrae age estimation with an average error of 1.9 years. Dental variables and measurements of cervical vertebrae were associated and new regression equations were developed for Brazilians, and the average error of equations developed in the study was 1.0 year. Finally, the method with radiographic indexes was easy to perform after adequate training, reliable and can be used in forensic practice. In addition, the use of new equations presented in this study is recommended because associating cervical vertebrae data with dental development allowed age estimates with greater accuracy.
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Holm, Kvist Loka, and Stella Sabo. "How old are you? Age assessments based on dental radiographs of third molars around the 18-year-threshold in different populations, a systematic review." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19964.
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SammanfattningMineralisering och utveckling av visdomständer kan användas som åldersindikator i övre tonåren och används för asylsökande utan identifikation eller födelseattest. Utvärderingen görs med hjälp av dentala röntgenbilder och olika tolkningsmodeller.Målet med den aktuella studien var att undersöka åldersbedömningsmetoder på röntgenbilder av visdomständers tillförlitlighet och överensstämmelse med fokus på populationsgrupper och etnicitet. Detta är av vikt då resultat från en sådan bedömning ligger till grund för juridiska beslut huruvida en individ är vuxen eller ett barn (över eller under 18 år).En systematisk sökning genomfördes i PubMed, Embase och Cochrane enligt PRISMA-modellen, och 23 artiklar som uppfyllde inklusionskriterierna granskades av två observatörer enligt en modifierad QUADAS 2 och tio artiklar bedömdes ha låg risk för bias.Populationsbeskrivningarna var bristande. Detta leder till svårigheter att utföra bedömningar av artiklars resultat och precision, därmed också jämförelser mellan olika studier. Problemet ligger på en generell nivå då definitioner är osäkra, men samtidigt i de separata artiklarna då de inte redovisat någon definition.Det var svårt att jämföra de inkluderade artiklarna då deras syften och metoder varierade. Huvudfyndet var att de flesta artiklarna konkluderade att användningen av visdomstanden som en åldersindikator i de övre tonåren är en otillräcklig metod. Användning och betydelse av dess resultat bör därför ifrågasättas.AbstractThe mineralization and development of the third molars can be used as an indicator of age in the upper teens and is used in purpose of assessing age in asylum seekers without identification or birth certificates. The evaluation is determined with dental radiographs and different methods of interpretation.The aim of the study was to investigate the accuracy and precision of different age estimation models of radiographs of third molars, focusing on population groups and ethnicity. This is of great importance since the results of an age assessment constitute the basis in a juridical outcome, deciding whether an individual is an adult or a child (over or under 18 years of age). A systematic search of PubMed, Embase and Cochrane was made according to the PRISMA-statement, and 23 articles which met the inclusion criteria were assessed using a modified QUADAS 2 by two observers, ten of these were graded as having low risk of bias.Population groups were poorly described, leading to difficulties in evaluating results and precision, thereby also comparisons between different studies. The problem both lay at a general level where definitions are ambivalent, but also in the separate articles where definitions are missing.It was hard to compare the included papers since their aims and methods varied. The main finding was that most of the articles concluded that the use of the third molar as an age indicator in the upper teens is an insufficient system. The use and impact of the results should thereby be questioned.
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Soltis, Joanna Marie. "Patterns of long bone growth and dental eruption and the estimation of age in juvenile skeletal remains." Thesis, Wichita State University, 2010. http://hdl.handle.net/10057/3745.
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Wohlford, Christine A. "Identifying Risk Factors Associated with Early Childhood Caries in Children Under Three Years of Age." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1274823503.
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Kazzazi, Seyedeh Mandan. "Dental metric standards for sex estimation in archaeological populations from Iran." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31067.
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Sex estimation of skeletal remains is one of the major components of forensic identification of unknown individuals. Teeth are a potential source of information on sex and are often recovered in archaeological or forensic contexts due to their post-mortem longevity. Currently there is limited data on dental sexual dimorphism of archaeological populations from Iran. This dissertation represents the first study to provide a dental sex estimation method for Iron Age populations. The current study was conducted on the skeletal remains of 143 adults from two Iron Age populations in close temporal and geographic proximity in the Solduz Valley (West Azerbaijan Province of Iran). 2D and 3D cervical mesiodistal and buccolingual and root volume measurements of maxillary and mandibular teeth were used to investigate the degree of sexual dimorphism in permanent dentition and to assess their applicability in sex estimation. In total 1327, 457, and 480 anterior and posterior teeth were used to collect 2D cervical, 3D cervical, and root volume measurements respectively. 2D cervical measurements were taken using Hillson-Fitzgerald dental calliper and 3D measurements were collected using CT images provided by Open Research Scan Archive (ORSA) - Penn Museum. 3D models of the teeth were created using manual segmentation in the Amira 6.01 software package. Since tooth density largely differs from crown to apex, root segmentation required two threshold levels: the segmentation of the root from the jaw and the segmentation of the crown from the root. Thresholds used for root segmentation were calculated using the half maximum height protocol of Spoor et al. (1993) for each skull, and thresholds used for crown segmentation were set visually for each tooth separately. Data was analysed using discriminant function analysis and posterior probabilities were calculated for all produced formulae where sex was previously assessed from morphological features of pelvis and skull. Bootstrapping was used to account for small sample sizes in the analysis. Statistical analysis was carried out using SPSS 23. The percentage of sexual dimorphism was also used to quantify the amount of sexual dimorphism in the sample. The results showed that incisors and canines were the most sexually dimorphic teeth, providing percentages of correct sex classification between 80% and 100% depending on the measurement used. Root volume measurement was shown to be the most sexually dimorphic variable providing an accuracy of over 90% in all functions. The present study provided the first dental metric standards for sex estimation using odontometric data in Iranian archaeological populations. Dental measurements, particularly root volume measurements, were found to be of value for sex assessment and the method presented here could be a useful tool for establishing accurate demographic data from skeletal remains of the Iron Age from Iran.
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Pfau, Richard O. "A method for establishing the chronological age of subadults based upon the covariance of dental and skeletal development." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1328132089.
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Habibian, Mina. "Dietary habits, feeding behaviours and dental health in infants : a prospective study from birth to 18 months of age." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395969.
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Warren, Kerryn Ashleigh. "Population variation within the Iron Age of southern Africa: an assessment using dental anthropological and cranio-mandibular metric techniques." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/9794.
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Includes bibliographical references.Evidence for iron smelting, agriculture, elaborate pottery styles and increased sedentism appears abruptly in areas previously inhabited by hunter-gatherers and herders during the Early Iron Age (EIA) of southern Africa from around 250CE. Ceramic evidence connects these (cultural) populations to the second millennium Iron Age sites in eastern Botswana. This material culture differs from second millennium Late Iron Age (LIA) sites in South Africa which are attributed to migrations from east Africa and are connected, via the material culture, to modern Sotho-Tswana and Nguni speakers. Although the material culture of this period is well-studied, there is a gap in correlating Iron Age biological identity with the established cultural identity. Here I present an analysis of metric and nonmetric dental and cranial variation to better understand biological relationships among these samples. Specimens from the LIA, EIA and Eastern Botswana are compared with each other, and to specimens from Iron Age Zambian sites, modern Bantu-speakers and a historic Ndebele site from the midnineteenth century. This research indicates few differences between the EIA and LIA groups, although surprisingly a sample from eastern Botswana is more similar to the LIA group than the EIA group. The Iron Age samples are significantly different from the modern sample, while the historic sample lies intermediate to the Iron Age and modern samples, indicating that Iron Age peoples had a pattern of dental and cranio-mandibular variation that differs from what is seen in modern (admixed?) descendants. This research has important implications for our understanding of the sub-Saharan African dental complex, showing population differences within this complex (between Khoesan and Iron Age peoples) as well as variation over time (between Iron Age peoples and modern Bantuspeakers). This indicates that, while farmers within the Iron Age of southernmost Africa are generally homogenous, there are important differences between populations in sub-Saharan Africa that reflect complex and differing histories.
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Parras, Zissis. "The biological affinities of the Eastern Mediterranean in the Chalcolithic and Bronze Age : a regional dental non-metric approach." Thesis, University of Sheffield, 2004. http://etheses.whiterose.ac.uk/10267/.
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This study investigated biological population affinities amongst Eastern Mediterranean Chalcolithic and Bronze Age human skeletal samples. Seven hundred and eighty-six human remains from eight different sites in Cyprus, Greece and Syria were studied. The sites range in age from the Cypriot Chalco lithic (SouskiouVathyrkakas, Lemba-Lakkous and Kissonerga-Mosphilia) to Cypriot Late Bronze Age (Enkomi and Ayios Iakovos), Syrian Early Bronze (Jerablus-Tahtani) and Greek Middle Bronze Ages (Lema and Asine). Age, sex and non-metric traits from the dentition, crania and post-crania were recorded. Using the non-metric dental data the biological affinities of these sites were determined. Two statistics were utilised with the non-metric traits to determine biological affinities, the Mean Measure of Divergence (MMD) and the Coefficient of e (D.e). The comparisons bet\veen the sites from southwest Cyprus show all three sites, which are in close spatial proximity, to be statistically biologically similar. Also they appeared to show some relation to the Syrian Early Bronze age site of Jerablus-Tahtani. These findings are in contrast to the different material cultures of these two regions, which may suggest the biological relation may be based on the ancestral contact between Cyprus and the mainland. The Cypriot Late Bronze sites show a mixed relation with the Chalco lithic samples with some relations with the Middle Bronze Age Greek samples and Syria. Where geographical distance is usually a factor in these types of comparisons, this study suggests time may also be a factor.
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Lee, Kwok-lun. "The oral epidemiology of 45-64 year-old Chinese residents of a housing estate in Hong Kong coronal and root caries /." Click to view the E-thesis via HKUTO, 1988. http://sunzi.lib.hku.hk/HKUTO/record/B38628260.
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Perales, Quito Liz Mónica, and Ñahuinlla Andrea Gianella Huaman. "Comparación de los métodos Demirjian, Cameriere y Nolla para la estimación de la edad dental según la edad cronológica en una población peruana." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/653072.
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Objetivo: Comparar los métodos de Demirjian, Nolla y Cameriere para la estimación de la edad según la edad cronológica en una población peruana.
Materiales y métodos: El diseño del estudio es de tipo descriptivo, de corte transversal. Se seleccionaron 193 radiografías panorámicas aleatoriamente de niños de 6 a 14 años de edad. Se compararon la edad cronológica (EC) y la edad dental (ED) según los métodos de Nolla, Demirjian y Cameriere, utilizando las Pruebas de Rangos de Wilcoxon y Kruskall Wallis.
Resultados: La media de la EC fue de 8.77±2.34 y 8.90±2.04 años para el género femenino y masculino, respectivamente. La diferencia de medias de la EC y ED de acuerdo con los métodos Nolla años, Demirjian y Cameriere años fue de -0.38, 0.96 y -0.29 años, respectivamente, para la muestra total de estudio.
Conclusiones: Se encontró una correlación positiva para los tres métodos estudiados, sin embargo, el método de Demirjian mostró una diferencia estadísticamente significativa con una subestimación de -0.91 años en la muestra total. Asimismo, el método de Cameriere fue el que tuvo más cercanía a la edad cronológica.Aim: The aim of this study is to compare Demirjian, Nolla and Cameriere methods for the estimation of dental age in peruvian population. Materials and Methods: This retrospective and cross-sectional study included 193 panoramic radiographs randomly selected from children aged between 6 and 14 years. Chronological age (CA) and dental age (DA) were compared using the Wilcoxon and Kruskall Wallis Range Tests. Results: The mean was 8.77 ± 2.34 and 8.90 ± 2.04 years of the CA for the female and male gender, respectively. The difference in means of the CA and DA according to the Nolla, Demirjian and Cameriere methods were -0.38, 0.96 and -0.21 years, respectively, for the total study sample. Conclusions: A positive correlation was found for the three methods studied, however, the Demirjian method showed a statistically significant difference with an underestimation of -0.91 years in the total sample. Also, the method of Cameriere was the closest to the chronological age.
Tesis
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Saraka, Erwin Mansyur Ugu. "Skeletal biology of human populations between classical and post-classical times in Italy: The evidence of dental enamel hypoplasia." Master's thesis, Universidade de Évora, 2019. http://hdl.handle.net/10174/27722.
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Abstract:
Linear enamel hypoplasia (LEH) occurs during tooth formation and shows systemic physiological
stress caused by various factors, including; malnutrition, congenital genetic defects and infections.
It can be identified as pits or grooves, that are mostly visible on the labial side of the teeth crowns.
For this work, all the material analyzed come from skeletal remains of classical and post-classical
populations from Italy (IV - VIII century AD); it pertains to the cemeteries of Povegliano Veronese
(POV), in Verona, Northern Italy, and Selvicciola (SLV) in Viterbo, Central Italy, now stored in
the Museum of Anthropology "Giuseppe Sergi" of the Sapienza University of Rome. Linear
Enamel Hypoplasia data collected from POV include 56 adult individuals (namely 23 males, 22
females and 11 undetermined), while at SLV, the total population of 120 individuals consists of
29 males, 14 females, 32 undetermined and the rest are infants, children and sub adults. The aim
of this research is to provide an overview of the frequency of enamel hypoplasia, the earliest
developmental age estimates for the formation of dental enamel hypoplasia as well as the
nutritional status in comparing the two populations. Identification, description and assessment
through macroscopic analysis were used to investigate the timing of growth of the disturbance.
Data obtained from measurements using standardized methods were processed by statistical
analysis using a regression equation for estimation of the age of occurrence. The frequency of
individuals with LEH at POV is around 41%, while at SLV 37.5% of the population was affected.
The age of occurrence of LEH at POV ranges between 1.0/1.5 and 7.1/7.5 years and reaches the
peak in the age classe of 2.1/2.5. On the other hand, LEH at SLV is found between 0.0/0.5 and
5.6/6.0 age at death with a peak around 2.1/2.5 and 2.6/3.0. Comparison of LEH chronological
distribution based on sex from POV and SLV shows that LEH at POV is dominated by female
with a fairly high frequency compared to male, meanwhile in SLV it is the opposite.
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Maia, Maria Cristina Germano. "Determina??o da idade dental de crian?as brasileiras nordestinas: novos valores de convers?o de maturidade dental para popula??o espec?fica." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/13200.
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Previous issue date: 2010-09-17Since Demirjian's system of estimating dental maturity was first described, many researchers from different countries have tested its accuracy among diverse populations. Some of these studies have pointed out a need to determine population-specific standards. In Brazil, the Northeast region is the one that most suffers the negative impact of exodus, specially related to the increase of abandoned children in the cities. The aim of this study was to test the accuracy of Demirjian's system for assessing the dental maturity of northeastern Brazilian children, so as to present a scale for maturity score conversion into dental age developed specifically for this population. This could be used for forensic, anthropological and legal matters, and also as a model for other countries attempting to formulate their own conversion scales. Panoramic radiographs of 1,491 children (821 females and 670 males), aged 7 to 13 years, from Cear? state, northeast Brazil, were assessed by a single observer to determine dental age (DA) according to Demirjian's system. The mean percentage of intra-observer agreement was 86.6%, with a mean Cohen's Kappa coefficient of 0.67 (substantial agreement). The DA was compared by paired t-test to subjects' chronological age (CA). The differences between CA and DA in all age groups were statistically significant (p<0.0001), demonstrating a great advancement in DA among Brazilians. Scatter plots were drawn for both genders, and the data were fitted to a growth curve, y = 100/ (1 + e-a(x b)). Graphs corresponding to the 50th percentile curves were produced. A table with new values for the conversion of maturity score into dental age for northeastern Brazilian children is presented. The great advancement in DA, as obtained by Demirjian's system in this population, justified the determination of specific scores for dental maturity assessment
A estimativa da maturidade dent?ria tem sido descrita na literatura basicamente atrav?s de dois m?todos, a observa??o direta do processo de erup??o do dente na cavidade oral ou por meio de radiografias. A radiografia panor?mica, obtida por t?cnica extra-oral de uso dos raios X, ? um elemento essencial para o diagn?stico por imagens em Radiologia odontol?gica. Este trabalho apresenta dois estudos quantitativos anal?tico-descritivos utilizando o m?todo de determina??o da idade dental atrav?s de radiografia panor?mica em crian?as brasileiras nordestinas. Um estudo piloto realizado com 325 crian?as (191 meninas e 134 meninos) de 7 a 16 anos, da cidade de Fortaleza, objetivando determinar as interrela??es entre as suas idades cronol?gica (data de nascimento), ?ssea (pelo m?todo de Grewlich & Pyle) e dental (segundo Demirjian et al.). Outro estudo, j? publicado, conduzido com 1.491 crian?as (821 meninas e 670 meninos) cearenses, de 7 a 13 anos, visando avaliar a aplicabilidade do m?todo de Demirjian na popula??o estudada. Em ambos os estudos, mostra-se que a estimativa de idade dental utilizando as tabelas de convers?o de maturidade dental propostas por Demirjian et al. n?o se ad?qua ? popula??o pesquisada. Assim, uma escala de valores de convers?o de maturidade dental em idade dental foi desenvolvida especificamente para crian?as nordestinas e ? agora apresentada, visando ? sua aplica??o n?o s? na cl?nica, mas em quest?es forenses, antropol?gicas, legais e/ou criminais. As pesquisas de car?ter interdisciplinar envolveram pesquisadores das ?reas de Odontologia (Odontopediatria, Ortodontia e Radiologia); Medicina (Endocrinologia e Metabologia); e F?sica, preenchendo os requisitos de multidisciplinaridade do Programa de P?s-Gradua??o em Ci?ncias da Sa?de