Academic literature on the topic 'Teeth Dental arch'
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Journal articles on the topic "Teeth Dental arch"
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Hovorakova, Maria, Oldrich Zahradnicek, Martin Bartos, et al. "Reawakening of Ancestral Dental Potential as a Mechanism to Explain Dental Pathologies." Integrative and Comparative Biology 60, no. 3 (2020): 619–29. http://dx.doi.org/10.1093/icb/icaa053.
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Synopsis During evolution, there has been a trend to reduce both the number of teeth and the location where they are found within the oral cavity. In mammals, the formation of teeth is restricted to a horseshoe band of odontogenic tissue, creating a single dental arch on the top and bottom of the jaw. Additional teeth and structures containing dental tissue, such as odontogenic tumors or cysts, can appear as pathologies. These tooth-like structures can be associated with the normal dentition, appearing within the dental arch, or in nondental areas. The etiology of these pathologies is not well elucidated. Reawakening of the potential to form teeth in different parts of the oral cavity could explain the origin of dental pathologies outside the dental arch, thus such pathologies are a consequence of our evolutionary history. In this review, we look at the changing pattern of tooth formation within the oral cavity during vertebrate evolution, the potential to form additional tooth-like structures in mammals, and discuss how this knowledge shapes our understanding of dental pathologies in humans.
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Al-Zubair, Nabil Muhsen. "Dental arch asymmetry." European Journal of Dentistry 08, no. 02 (2014): 224–28. http://dx.doi.org/10.4103/1305-7456.130608.
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ABSTRACT Objective: This study was conducted to assess the dental arch asymmetry in a Yemeni sample aged (18-25) years. Materials and Methods: The investigation involved clinical examination of 1479 adults; only 253 (129 females, 124 males) out of the total sample were selected to fulfill the criteria for the study sample. Study models were constructed and evaluated to measure mandibular arch dimensions. Three linear distances were utilized on each side on the dental arch: Incisal-canine distance, canine-molar distance and incisal-molar distance, which represent the dental arch segmental measurements. Results: When applying “t-test” at P < 0.05, no significant differences were found between the right and left canine-molar, incisal-canine and incisal-molar distances in both dental arches for both sexes. The greater variation (0.30 mm) was observed between right and left canine-molar distance in the maxillary dental arch in male and the smaller (0.04 mm) in the mandibular dental arch between the right and left canine-molar distance in females. Conclusion: The findings of the present study revealed a symmetrical pattern of dental arches, since the right and left sides showed no statistically significant difference. In general, it can be observed that the measurements related to the central incisors and canines have the widest range of reading and give the impression that the location of central incisor and canines to each other and to other teeth is the strongest factor in determining the dental arch asymmetry.
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Ahmed, Maheen, Attiya Shaikh, and Mubassar Fida. "Evaluation of conformity of preformed orthodontic archwires and dental arch form." Dental Press Journal of Orthodontics 24, no. 1 (2019): 44–52. http://dx.doi.org/10.1590/2177-6709.24.1.044-052.oar.
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ABSTRACT Introduction: The alterations in the arch form during treatment are dictated by the dimensions of the archwires. Objective: This study aimed to determine the mean arch dimensions of a sample of Pakistani subjects and to evaluate the conformity of preformed archwires with mandibular arch form. Methods: The dental records of 1,500 adult subjects were evaluated. The mandibular casts of 42 subjects (males = females = 21) with balanced facial profile, Class I occlusion, ideal overjet and overbite were included. Brackets were bonded on all teeth. Arch dimensions were evaluated at canines, first premolars, second premolars, first and second molars, with digital vernier calipers. The arch widths at the level of aforementioned teeth were evaluated on the digitized archwires, using the mean arch depths of the subjects. Results: In males, the archwires were found to be wider at canines and premolars, and significantly narrower at first (p< 0.001, 95% CI = 2.03 - 5.74) and second molars (p< 0.001, 95% CI = 2.29 - 7.73) as compared to the arch dimensions of the mandibular casts. In females, the archwires were significantly narrower at canines (p< 0.001, 95% CI = 1.4 - 3.97), and first (p= 0.02, 95% CI = 0.402 - 4.41) and second molars (p< 0.001, 95% CI = 1.76 - 6.13). Conclusion: No single commercially available archwires evaluated in the present study conformed to the arch dimensions of our subjects. Utilization of the currently available archwires may result in unwarranted modification of arch form, which may lead to unstable post-treatment teeth position.
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Ribeiro, Marco Túlio Freitas, Marco Aurélio Camargo da Rosa, Rosa Maria Natal de Lima, Andréa Maria Duarte Vargas, João Paulo Amaral Haddad, and Efigênia Ferreira e Ferreira. "Edentulism and shortened dental arch in Brazilian elderly from the National Survey of Oral Health 2003." Revista de Saúde Pública 45, no. 5 (2011): 817–23. http://dx.doi.org/10.1590/s0034-89102011005000057.
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OBJECTIVE: To describe the distribution of edentulism and estimate the prevalence of functional dentition and shortened dental arch among elderly population. METHODS: A population-based epidemiological study was carried out with a sample of 5,349 respondents aged 65 to 74 years obtained from the 2002 and 2003 Brazilian Ministry of Health/Division of Oral Health survey database. The following variables were studied: gender; macroregion of residence; missing teeth; percentage that met the World Health Organization goal for oral health in the age group 65 to 74 years (50% having at least 20 natural teeth); presence of shortened dental arch; number of posterior occluding pairs of teeth. The Chi-square test assessed the association between categorical variables. The Kruskal-Wallis and Mann-Whitney tests were used to assess differences of mean between number of posterior occluding pairs teeth, macro-region and gender. RESULTS: The elderly population had an average of 5.49 teeth (SD: 7.93) with a median of 0. The proportion of completely edentulous respondents was 54.7%. Complete edentulism was 18.2% in the upper arch and 1.9% in the lower arch. The World Health Organization goal was achieved in 10% of all respondents studied. However, only 2.7% had acceptable masticatory function and aesthetics (having at least shortened dental arch) and a mean number of posterior occluding pairs of 6.94 (SD=2.97). There were significant differences of the percentage of respondents that met the World Health Organization goal and presence of shortened dental arch between men and women. There were differences in shortened dental arch between macroregions. CONCLUSIONS: The Brazilian epidemiological oral health survey showed high rate of edentulism and low rate of shortened dental arch in the elderly population studied, thus suggesting significant functional and aesthetic impairment in all Brazilian macroregions especially among women.
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Dmitrienko, S. V., B. N. Davydov, D. A. Domenyuk, and S. O. Ivanyuta. "Morphometric analysis of relationships of basic dimensions of dental arts taking into account individual gnatic types." Medical alphabet 1, no. 5 (2019): 37–44. http://dx.doi.org/10.33667/2078-5631-2019-1-5(380)-37-44.
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Aim. Determining the relationship between the main parameters of the dental arches of the upper and lower jaw in people with physiological occlusion of permanent teeth. Materials and methods. The research materials were the results of biometric measurements of plaster models of dentition of 119 people of the first period of adulthood with a full set of permanent teeth, physiological occlusion, and various gnathic and dental types of dental arches. The gnathic variants (mesognathy, dolichognathy, brachygnathy) of the dental arches were determined taking into account the dental index calculated as the ratio of the half of the sum of the 14-tooth crowns to the width of the dental arch between the second molars. Types of the dental system (normodontia, macrodontia, microdontia) were determined by the results of the summation of the width of the crowns of the upper teeth. Results. According to the results of biometric studies, it was established that regardless of the gnathic and dental type of dental arches, the ratio of the sum of the mesial-distal sizes of 14 teeth of the upper jaw to the same parameters of the lower jaw averaged 1.065 ± 0.005. The ratio of the sum of the width of the crowns of 7 teeth of each half of the dental arch to the size of the frontal-distal diagonal was 1.065 ± 0.005 both on the upper and on the lower dental arch. The ratio of the diagonal dimensions of the upper dental arch to the same size of the lower arch was also 1.065 ± 0.01 for all types of dental arches. Conclusion. The obtained ratios, as highly informative, diagnostically significant indicators, can be used to determine the compliance of the main dimensions of the dental arches of the upper and lower jaws, to characterize the physiological occlusion, to select the size of artificial teeth in people with complete adentia, to predict the shape and size of dental arches when treatment of patients with occlusion anomalies in order to achieve an optimal functional and aesthetic result.
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Consolaro, Alberto, and Mauricio de Almeida Cardoso. "Impacted teeth: Their place is in the dental arch." Dental Press Journal of Orthodontics 24, no. 6 (2019): 20–26. http://dx.doi.org/10.1590/2177-6709.24.6.020-026.oin.
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ABSTRACT The starting point for the treatment of unerupted teeth should consider the fact that, biologically, the pericoronal follicle maintains the ability to release EGF and other mediators responsible for eruption over time. The eruptive events may be guided and directed, so that teeth may occupy the space prepared to receive them in the dental arch, as showed in the case presented to evidence the following principle to be considered in these cases: “Regardless of the position of an unerupted tooth, it may be biologically directed to its place in the dental arch. The orthodontist should apply a mechanics to guide it and park it at its site.”
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Ivanyuta, Oleg, Ghamdan Al-Haraz, Dmitry Domenyuk, et al. "MODIFICATION OFTHE DENTAL ARCH SHAPE USING GRAPHIC REPRODUCTION METHOD AND ITS CLINICALEFFECTIVENESS IN PATIENTS WITH OCCLUSION ANOMALIES." Archiv Euromedica 10, no. 4 (2020): 181–90. http://dx.doi.org/10.35630/2199-885x/2020/10/4.42.
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Based on the results of the dentoalveolar system morphometry performed in patients with permanent teeth physiological occlusion we have developed a method for studying the anterior dental arch. It follows the circle of geometry patterns as well as stable values in the medialdistal dimensions of the front teeth crowns. In view of the mesial-distal dimensions of 14 teeth and dental arch width between the second molars and individually built radius of the circle we modified the method of dental arches graphic reproduction. The first stage of the dental arch individual shape graphic reproduction implies designing a dental pentagon, whereas its base is the width of the dental arch between the second molars, and the median sagittal line determines the depth of the dental arch. The upper sides of the pentagon (incisor-canine diagonals) run from the central interincisal point to the canine point, while the lower sides (canine-molar diagonals) connect the canine points to the molar points. At the second stage of the dental arch individual shape graphic reproduction, a circle is outlined, whose radius is related directly to the width of the anterior dental arch, and has an inverse relationship with its depth. There is a proof offered for clinical feasibility of the method employed to predict the optimal individual shape of the dental arch through graphic reproduction in patients with class I Angel occlusion issues. The study showed that the effectiveness of therapeutic and diagnostic measures for patients with abnormal shape and size of dental arches. It can be achieved if the sequence of the graphic construction stages is strictly followed.
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Rugina, Roxana, Alexandru Rugina, Cristian Petri, and Cosmin Sinescu. "Interdisciplinary Treatment of an Adult Patient Using an Adjunctive Orthodontic Approach. Case Report." Journal of Interdisciplinary Medicine 2, s1 (2017): 68–72. http://dx.doi.org/10.1515/jim-2017-0017.
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Abstract The aim of this case presentation is to outline some of the advantages that an adjunct orthodontic treatment can offer in a comprehensive oral rehabilitation of an adult patient. Adjunctive orthodontic treatment is usually limited to a dental arch or to a group of teeth within an arch. The purpose of dental movements in this case will be to position the teeth in a way that makes the restoration or replacement of damaged or missing teeth as easy as possible and with minimal dental tissue sacrifice. In addition, the improved position of the teeth will create a healthier periodontal environment that is easier to maintain over time.
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Nassani, Mohammad Zakaria, Tammam Ibrahim Al-Nahhal, Omar Kujan, Bassel Tarakji, and Elizabeth Jane Kay. "The Impact of Subject Age, Gender, and Arch Length on Attitudes of Syrian Dentists towards Shortened Dental Arches." International Journal of Dentistry 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/643176.
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Objective. This study aimed to investigate the impact of subject age, gender, and arch length on dentists’ attitudes towards unrestored shortened dental arches.Materials and Methods. 93 Syrian dentists were interviewed and presented with 24 scenarios for male and female subjects of different ages and shortened dental arches of varying length. Participants were asked to indicate on a standardized visual analogue scale how they would value the health of the mouth if the posterior space was left unrestored.Results. A value of 0.0 represented the worst possible health state for a mouth and 1.0 represented the best. The highest mean value (0.73) was assigned to a shortened dental arch with missing second molar teeth in the mouth of a 70-year-old subject. A 35-year-old female subject with an extremely shortened dental arch (all molar and premolar teeth are missing) attracted the lowest mean value (0.26). The statistical analysis indicated a significant decrease in the value placed on unrestored shortened dental arches as the number of remaining teeth decreased (p<0.008). While subject gender had almost no impact on dentists’ attitudes towards shortened dental arches, the scenarios for the older shortened dental arch subjects attracted significantly higher values compared to the scenarios for the younger subjects (p<0.017).Conclusion. Subject age and arch length affect dentists’ attitudes towards shortened dental arches, but subject gender does not.
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Decusară, Mioara, Cerasella Dorina Şincar, and Gabriel Valeriu Popa. "Clinical and therapeutical aspects of dental impaction." Romanian Journal of Stomatology 63, no. 3 (2017): 137–41. http://dx.doi.org/10.37897/rjs.2017.3.7.
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Introduction. Dental impaction represents the group of isolated dental anomalies characterized by retention of a tooth with a fully formed root in the jaw bone, after the eruption period has passed. This anomaly may affect deciduous teeth, permanent or supernumerary teeth causing aesthetic and / or functional disorders. Case report. The case presents a clinical situation of a girl who presented two maxillary teeth impacted (a central incisor and a cuspid) who underwent surgical exposure and orthodontic treatment for their arch alignments. Conclusions. Impacted teeth may produce dental malpositions or root resorption of the adjacent teeth, cysts or chronic local infections, which carry out a surgical orthodontic treatment, complex and for a long term, depending on the clinical situation existing.
Dissertations / Theses on the topic "Teeth Dental arch"
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Lau, Chi-kai George. "The relationship of the upper anterior teeth to the incisive papilla in Cantonese adults." Click to view the E-thesis via HKUTO, 1990. http://sunzi.lib.hku.hk/HKUTO/record/B38628314.
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Lau, Chi-kai George, and 劉熾佳. "The relationship of the upper anterior teeth to the incisive papilla in Cantonese adults." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1990. http://hub.hku.hk/bib/B38628314.
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Paranhos, Luiz Renato. "Associação entre o padrão esqueletico facial, a morfologia da coroa do incisivo central superior e a forma do arco dental mandibular." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290763.
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Orientadores: Eduardo Daruge Junior, Fausto Berzin<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba<br>Made available in DSpace on 2018-08-14T06:21:20Z (GMT). No. of bitstreams: 1
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Previous issue date: 2009<br>Resumo: Objetivo: verificar a prevalência da morfologia do arco dental mandibular, da coroa do incisivo central superior e do padrão esquelético da face em brasileiros com oclusão normal natural, e determinar se existe associação entre estas variáveis.
Material e Métodos: a amostra foi composta de 51 indivíduos leucodermas com oclusão normal natural, sem história de tratamento ortodôntico prévio, que apresentavam no mínimo quatro das seis chaves de oclusão de Andrews. O padrão esquelético da face foi definido por duas grandezas cefalométricas (SN.Gn e SN.GoGn). As imagens dos arcos dentais mandibulares e dos incisivos superiores geradas pela digitalização dos modelos foram avaliadas por 12 ortodontistas. Para verificar a concordância entre examinadores, quanto à classificação da morfologia do arco dental e do incisivo central, foi utilizado o teste Kappa. Para verificar a associação entre as variáveis foi utilizado o teste do quiquadrado. Resultado: a prevalência de arco dental com formato ovalar foi de 41,17%, quadrangular de 39,22%, e triangular de 19,61%. Os dentes apresentaram a seguinte prevalência: ovalar (47,06%), seguido de quadrangular (31,37%) e triangular (21,57%). Quanto ao padrão esquelético da face foi encontrado 47% de indivíduos braquifaciais, seguido de 27% de indivíduos mesofaciais e 26% de dolicofaciais. O teste do qui-quadrado não mostrou haver associação estatisticamente significante entre as variáveis estudadas.
Conclusão: a referência do padrão esquelético da face na determinação da morfologia do arco dental e/ou da coroa dental não é apropriada.<br>Abstract: Aim: to verify the prevalence of lower arch morphology, upper central incisor shape and craniofacial pattern among young Brazilians with natural normal occlusion. The study also evaluated any association among these variables. Material and Methods: the sample consisted of 51 caucasian individuals featuring normal occlusion, with no history of previous orthodontic treatment, and matching at least four of six keys to optimal occlusion as described by Andrews. The craniofacial pattern was defined by two cephalometric measurements (SN.Gn and SN.GoGn). Lower arch and central upper incisor images were digitalized from plaster models. Twelve orthodontists evaluated every image. Agreement tests both for dental arch and upper incisor shape were performed using the Kappa method. Associations among variables were tested through the chi-square test. Results: oval dental arch form was found in 41.17% of the sample, square form in 39.22%, and triangular shape in 19.61%. Dental shape was prevalent as follows: oval (47.06%), square (31.37%) and triangular shape (21.57%). Forty-seven percent of the sample presented a brachycephalic pattern, 27% of subjects were mesocephalic, and 26% were dolicocephalic pattern. The chi-square test did not show statistically significant association among studied variables (craniofacial pattern, dental arch form and upper central incisor shape). Conclusion: the craniofacial pattern did not serve as a reference to estimate dental arch form or dental crown shape.<br>Doutorado<br>Anatomia<br>Doutor em Biologia Buco-Dental
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Zaze, Cesar Aurélio. "Análise da variação da posição relativa dos dentes artificiais no arco dental em função do processamento de próteses totais mandibulares mensurada por computação gráfica /." Araçatuba : [s.n.], 2005. http://hdl.handle.net/11449/97381.
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Orientador: Humberto Gennari Filho<br>Banca: Helena de Freitas Oliveira Paranhos<br>Banca: Antonio Plese<br>Resumo: Este trabalho foi idealizado com o intuito de contribuir para os estudos pertinentes à área da prótese total, e teve como objetivo analisar a alteração da posição relativa dos dentes artificiais em razão do processamento de 40 próteses totais inferiores, obtidas por uma matriz de silicone pré-moldada. Na metodologia, as próteses foram divididas em quatro grupos de 10, que receberam os seguintes tratamentos: Grupo 1 - inclusão em muflas metálicas com muralha de gesso pedra tipo III e polimerização em banho de água quente; Grupo 2 - inclusão em muflas de fibra de vidro com muralha de gesso pedra tipo III e polimerização em microondas; Grupo 3 - inclusão em muflas metálicas com muralha de silicone e polimerização em banho de água quente e Grupo 4 - inclusão em muflas de fibra de vidro com muralha de silicone e polimerização em microondas. Como conclusões, os resultados demonstraram que houve alteração na posição dos dentes artificiais em todas as técnicas de processamento, com o grupo 3 apresentando os melhores resultados seguido dos grupos 4, 2 e 1.<br>Abstract: The purpose of this study is to analyze the change in denture tooth position in the fabrication of complete mandibular dentures after different processing techniques. A total of 40 mandibular complete dentures, obtained by a premolded matrix of silicon, were fabricated. There were a total of four groups of complete mandibular dentures. Each group consisted of 10 complete mandibular dentures which were fabricated in the following manner: Group 1 - were processed in a metallic flask using stone plaster type III and polymerized in hot water; Group 2 - were processed in a fiberglass flask using stone plaster type III and polymerized in a microwave; Group 3 - were processed in a metallic flask using silicon and stone plaster type III and polymerized in hot water; Group 4 - were processed in a fiberglass flask using silicon and stone plaster type III and polymerized in a microwave. In conclusion, the results demonstrated that there were alterations in tooth position in all processing techniques. However, Group 3 presented with the least amount of change in tooth positon, followed by Group 4, then Group 2, and finally Group 1 with the most amount of change in tooth position.<br>Mestre
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Zaze, Cesar Aurélio [UNESP]. "Análise da variação da posição relativa dos dentes artificiais no arco dental em função do processamento de próteses totais mandibulares mensurada por computação gráfica." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/97381.
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zaze_ca_me_araca.pdf: 893710 bytes, checksum: 246541052b07b294999b016436174c3a (MD5)<br>Universidade Estadual Paulista (UNESP)<br>Este trabalho foi idealizado com o intuito de contribuir para os estudos pertinentes à área da prótese total, e teve como objetivo analisar a alteração da posição relativa dos dentes artificiais em razão do processamento de 40 próteses totais inferiores, obtidas por uma matriz de silicone pré-moldada. Na metodologia, as próteses foram divididas em quatro grupos de 10, que receberam os seguintes tratamentos: Grupo 1 - inclusão em muflas metálicas com muralha de gesso pedra tipo III e polimerização em banho de água quente; Grupo 2 - inclusão em muflas de fibra de vidro com muralha de gesso pedra tipo III e polimerização em microondas; Grupo 3 - inclusão em muflas metálicas com muralha de silicone e polimerização em banho de água quente e Grupo 4 - inclusão em muflas de fibra de vidro com muralha de silicone e polimerização em microondas. Como conclusões, os resultados demonstraram que houve alteração na posição dos dentes artificiais em todas as técnicas de processamento, com o grupo 3 apresentando os melhores resultados seguido dos grupos 4, 2 e 1.<br>The purpose of this study is to analyze the change in denture tooth position in the fabrication of complete mandibular dentures after different processing techniques. A total of 40 mandibular complete dentures, obtained by a premolded matrix of silicon, were fabricated. There were a total of four groups of complete mandibular dentures. Each group consisted of 10 complete mandibular dentures which were fabricated in the following manner: Group 1 - were processed in a metallic flask using stone plaster type III and polymerized in hot water; Group 2 - were processed in a fiberglass flask using stone plaster type III and polymerized in a microwave; Group 3 - were processed in a metallic flask using silicon and stone plaster type III and polymerized in hot water; Group 4 - were processed in a fiberglass flask using silicon and stone plaster type III and polymerized in a microwave. In conclusion, the results demonstrated that there were alterations in tooth position in all processing techniques. However, Group 3 presented with the least amount of change in tooth positon, followed by Group 4, then Group 2, and finally Group 1 with the most amount of change in tooth position.
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Ehsani, Sayeh. "Two and three dimensional cephalometric assessment of dental and skeletal changes following orthodontic treatment with Damon passive self-ligating system." Master's thesis, 2010. http://hdl.handle.net/10048/1079.
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Thesis (M.Sc.)--University of Alberta, 2010.<br>A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science, Medical Science-Dentistry. Title from pdf file main screen (viewed on April 23, 2010). Includes bibliographical references.
Book chapters on the topic "Teeth Dental arch"
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(Phulari), Rashmi. "Class and Arch Traits of Canine Teeth." In Textbook of Dental Anatomy, Physiology and Occlusion. Jaypee Brothers Medical Publishers (P) Ltd., 2014. http://dx.doi.org/10.5005/jp/books/11986_16.
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Atkinson, Martin E. "Mastication." In Anatomy for Dental Students. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199234462.003.0035.
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Now you have an understanding of the anatomy of the maxilla and mandible, the TMJs, and jaw musculature, we can examine how these structures work together to produce the complex actions involved in the biting and chewing of food. Technically, incision is biting a piece from a larger chunk of food and mastication is the grinding down of that piece into smaller components and mixing them with saliva. Mastication is often used to cover both actions. Box 26.1 briefly compares the anatomy of the human dentition to that of other mammals. As well as knowledge of the TMJ, muscles of mastication, and other muscles used in jaw movements, it is necessary to appreciate some aspects of the static and dynamic relationships of the teeth to understand chewing movements. The first thing to notice is the bigger width of the upper dental arch compared to the lower arch, a condition known as anisognathy. In Figure 26.1A , you can see that the maxillary molars overhang the mandibular teeth by half a cusp width so the buccal cusps of the lower molars and premolars occlude between the buccal and palatal cusps of the maxillary teeth. Observe also that the long axis of the maxillary molars and premolars incline buccally while the corresponding axis of the mandibular teeth incline lingually; the occlusal plane of the posterior teeth is thus curved transversely as illustrated in Figure 26.1A . It would be possible to chew food simply by moving the teeth up and down without any side-to-side movement, but this would be inefficient and not make full use of the cusps on the occlusal surfaces of posterior teeth. However, we can only chew on one side at a time because of the anisognathy of the upper and lower teeth. Due to anisognathic jaw positions, the maxillary anterior teeth are also going to protrude in front of the mandibular anterior teeth. Figure 26.1B illustrates the normal relationships of the anterior teeth. The maxillary incisors overhang the mandibular incisors by about 2–3 mm in the horizontal plane; this is called the overjet. The upper incisors usually have a vertical overhang, the overbite, of about the same amount. As mentioned in Chapter 24 , the mouth at rest is closed by tonic contraction of the muscles of mastication and facial expression.
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(Phulari), Rashmi. "Class, Arch and Type Traits of Incisor Teeth." In Textbook of Dental Anatomy, Physiology and Occlusion. Jaypee Brothers Medical Publishers (P) Ltd., 2014. http://dx.doi.org/10.5005/jp/books/11986_15.
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(Phulari), Rashmi. "Class, Arch and Type Traits of Premolar Teeth." In Textbook of Dental Anatomy, Physiology and Occlusion. Jaypee Brothers Medical Publishers (P) Ltd., 2014. http://dx.doi.org/10.5005/jp/books/11986_17.
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(Phulari), Rashmi. "Class, Arch and Type Traits of Molar Teeth." In Textbook of Dental Anatomy, Physiology and Occlusion. Jaypee Brothers Medical Publishers (P) Ltd., 2014. http://dx.doi.org/10.5005/jp/books/11986_18.
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Robinson, Max, Keith Hunter, Michael Pemberton, and Philip Sloan. "Diseases of the teeth and supporting structures." In Soames' & Southam's Oral Pathology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199697786.003.0010.
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A wide variety of processes can affect the formation of teeth during development. The number, size, shape, and quality of dental hard tissue may be abnormal and teeth may erupt early or be prematurely shed or resorbed. When a child presents with a tooth abnormality, the clinical and radiographic features are often distinctive and management depends on diagnosis (Box 5.1). Broadly, developmental abnormalities of the teeth can be either genetically determined or acquired as a result of injurious processes affecting the developing teeth. It can be problematic to make a diagnosis, particularly when teeth initially erupt. Sometimes pathological examination of a shed or extracted tooth by ground sectioning (for enamel) or conventional sectioning of a decalcified tooth can provide a diagnosis. Research has provided insights into the genetic and structural basis of dental anomalies, and has resulted in a complex and extensive classification of subtypes. Minor abnormalities, such as failure of development of a few teeth or enamel erosion in adult life, may be dealt with in general dental practice, but it is advisable to refer younger patients with more complex or extensive dental abnormalities to a specialist in child dental health, with links to expert diagnostic facilities and input from orthodontic and restorative colleagues. The publically available Online Mendelian Inheritance in Man (OMIM) database provides an invaluable resource for genetic disorders, including dental abnormalities. Supernumerary teeth are common and may be rudimentary in form or of normal morphology, when they are referred to as supplemental teeth. The most common supernumerary tooth occurs in the mid- line of the maxillary alveolus and is referred to as a mesiodens, which usually has a conical shape. Eruption of adjacent normal successor teeth may be impeded by a mesiodens, which is an indication for its removal. Most supernumerary teeth occur as a sporadic event in development, but multiple extra teeth can be found in certain developmental disorders. Failure of development of tooth germs results in teeth missing from the dental arch and is referred to as hypodontia. Most often the missing teeth are third molars, second premolars, and upper lateral incisors. Hypodontia is more common in the permanent dentition than in the primary teeth.
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Severin, Emilia, George Gabriel Moldoveanu, and Andreea Moldoveanu. "Failure of Tooth Development: Prevalence, Genetic Causes and Clinical Features." In Human Teeth – Structure and Composition of Dental Hard Tissues and Developmental Dental Defects [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99419.
Full textAbstract:
In dental practice may be encountered a wide variability in the clinical dental phenotype of tooth number. Failure of tooth development at the bud stage causes tooth agenesis and reduction in tooth number in the dental arch which involves various complications. Tooth agenesis is one of the most common developmental anomalies of human permanent dentition and tends to run in families, may aggregate within families, suggesting a genetic cause. Tooth agenesis can occur in association with a variety of craniofacial syndromes, but it is also found as an isolated trait (familial or sporadic). Other tooth anomalies, such as tooth shape and size, delayed eruption of teeth, malposition, short roots or taurodontism, have been noted in association with non-syndromic tooth agenesis as well. Both the deciduous and permanent dentitions may be affected by missing teeth. Variations in the number of missing teeth can be determined by a mutation in one gene, by mutations in multiple genes, induced by local or systemically acting environmental factor, caused by a combination of gene mutations and environmental factors acting together, or by damage to chromosomes. As the number of missing teeth increases, so does the severity of clinical consequences and the impact on oral health–related quality of life.
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Van Vo, Nhan, Nguyen Quan Pham, Chien Dac Ho, Son Van Le, and Ha Manh Nguyen. "A New Technique of Two Iliac Cortical Bone Blocks Sandwich Technique for Secondary Alveolar Bone Grafting in Cleft Lip and Palate Patients." In Recent Advances in the Treatment of Orofacial Clefts [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99109.
Full textAbstract:
Alveolar cleft bone graft in the second stage of surgery was a crucial part of the cleft palate treatment protocol with many advantages: reconstructing bone for tooth eruption, supporting the periodontal structure for the teeth adjacent to the cleft, supporting and lifting the arch and preventing from collapsing of maxillary arch. Grafting technique and material are selected based on the treatment purpose that for orthodontic moving tooth into the arch or for dental implant rehabilitation. Cancellous material provides rapid vascularization and healing facilitating for tooth moving into the cleft site but easy to resorb that unsuitable for dental implant placement. While dense material is difficult to move teeth into the cleft but increase initial stability. Therefore, we offered a method that limit bone resorption, easily obtain the implant initial stability, quick osseointegration called two iliac cortical bone blocks sandwich technique for a purposes of dental implant rehabilitation. Treatment protocol started with orthodontic treatment prior alveolar bone grafting to create proper space for implant restoration. Our clinical experience with 32 cleft sites using two iliac cortical bone blocks sandwich had shown potential clinical application in follow-up time up to 96 months. Evaluation criteria of bone grafting for alveolar cleft included soft tissue condition of graft area, nasal fistula closure, bone grafting outcome, success in osseointegration and implant prosthesis. This chapter described in detail treatment procedure and outcomes of a new technique of two iliac cortical bone blocks sandwich for alveolar cleft in patients with unilateral cleft palate.
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Chianchitlert, Ann, Diane Selvido, Irin Sirisoontorn, Bishwa Prakash Bhattarai, Dinesh Rokaya, and Natthamet Wongsirichat. "Review in the Treatment Decision of Modalities for Impacted Second Molar." In Clinical Concepts and Practical Management Techniques in Dentistry [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99664.
Full textAbstract:
Impacted permanent tooth can occur on any tooth in the dental arch. The incidence of retention and impaction of the second molar lies between 0 and 2.3%. It is infrequently found in normal dental patients because most of the second molar impactions are asymptomatic. However, it is a common occurrence in orthodontic practice. The impacted second molar may provoke many pathologic disorders to the adjacent and opposite teeth, eventually malocclusions. There are many treatment modalities in facilitating the eruption of the second molar impaction. Early diagnosis and early treatment are crucial for the successful treatment of mandibular second molar impaction. This article presents an overview of various treatment modalities for an impacted second molar.
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Kidd, Edwina, and Ole Fejerskov. "When should a dentist restore a cavity?" In Essentials of Dental Caries. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780198738268.003.0007.
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At the start of this book it was commented that some dentists see restorative dentistry (fillings) as the treatment of dental caries. These dentists see prevention of caries as a separate issue. The authors profoundly disagree with this. The previous chapters have shown how dental caries develops and what it is, so in this chapter it is important to ask the question ‘with this knowledge in mind, what is the role of restorations (restorative dentistry) in caries control?’ Are restorations required or can the problem be solved by sealing all surfaces in the oral cavity—or at least those parts where surface irregularities (occlusal fissures, grooves, pits, etc.) may favour biofilm stagnation? Therefore, this chapter starts with a discussion of so-called fissure sealants. On occlusal surfaces, caries lesions may form at the entrance to the fissure because this complex morphology may be difficult to clean, particularly in the erupting tooth that is below the level of the arch and tends to be missed as the toothbrush swings by. Fissure sealants cover the fissures with a flowable resin or highly viscous glass ionomer cement, so that they are easier to clean. Their effectiveness has been proved in many studies. When first introduced in developed nations, all molar surfaces were recommended for sealing to avoid caries development and the need for fillings. This ‘sealing all teeth’ policy would now be totally incorrect for two reasons: ◆ Caries can be controlled by cleaning alone. ◆ Many of these surfaces will never develop lesions, and this automatic sealing approach is over treatment and not cost-effective. The indications for fissure sealing are: ◆ Active fissure caries has been diagnosed, but attempts at caries control have not arrested lesion progression. ◆ Occlusal surfaces are often highly irregular, and filled with grooves and fissures, and the patient or parent either cannot, or will not, remove plaque effectively. This is particularly important in the erupting molar. This surface is particularly at risk of lesion development and progression because permanent teeth can take 6–12 months to erupt; indeed, third molars may take several years.
Conference papers on the topic "Teeth Dental arch"
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Seshagiri, Naveen K., and Richard H. Crawford. "Computing Geometric Transformations of Irregular Teeth Sets for Orthodontic Treatment." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12504.
Full textAbstract:
This research evaluates the feasibility of assisting orthodontists to treat irregularities in teeth by computing the geometric transformations to move each tooth to its ideal position. The intent is to help orthodontists craft a precise and specific treatment plan for each patient. The inputs for finding the transformations are the patient’s teeth mold and dental arch templates. A 3D laser scanner is used to generate a point cloud data representation of the patient’s teeth mold. A commercial solid modeler is used to construct a non-uniform rational B-spline surface from this point cloud. Transformations are then computed by establishing a multiple scan registration, matching the axis of the patient’s teeth model and dental arch templates, and computation of initial and final positions of the teeth. The steps in the process and the algorithms developed were implemented in the scripting language of the solid modeler. Details of the algorithms are provided, and a case study is presented to demonstrate the process.