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Dissertations / Theses on the topic 'Dentition'

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Published: 4 June 2021
Last updated: 30 July 2024

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1

Asahara, Masakazu. "Variability and evolvability in mammalian dentition." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/175150.

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2

Lee, Chun-kei, and 李鎮基. "Dental anomalies in the primary dentition." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B4715567X.

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Delayed diagnosis of dental anomalies in the permanent dentition can lead to severe occlusal, functional and aesthetic problems. Early diagnosis is not feasible in the primary dentition stage without screening radiography, which is controversial due to possible mutagenic effects. However, some dental anomalies in the primary dentition of Caucasians have been found to be followed by anomalies of the permanent successors. Therefore, identifying individuals at high risk of having anomalies of their permanent teeth by screening children for dental anomalies in the primary dentition, will facilitate early diagnosis and appropriate treatment. The objectives of this study were to determine the prevalence of dental anomalies in the primary dentition of a southern Chinese child population, and to investigate the relationship between the presence of a talon cusp, missing or supernumerary tooth in the primary dentition and the number of the permanent successor teeth. A total of 1513 children from 12 kindergartens were invited to participate in the prevalence study. School children visiting a regional school dental clinic during a four-year period and having talon cusp, supernumerary tooth or congenitally missing tooth in the primary dentition were included in the study to determine the relationship to the permanent successors. A total of 1333 children, aged from 2 years 11 months to 5 years 5 months (mean age 4 years 4 months) were included in the prevalence study. The prevalence of the commonest dental anomaly, double tooth, was 4.28%. Almost 95% of which were in the mandibular anterior region; one third of the double teeth involved the central and lateral incisors while the other two-thirds involved a lateral incisor and canine. The prevalence of congenitally missing teeth was 3.53%; all but one were mandibular incisors, the majority of which were lateral incisors. Girls were affected twice as often as boys. Both talon cusp and a supernumerary tooth occurred rarely (0.15%) and they were only found in the maxillary incisor region. A study of 57 cases of talon cusp on primary maxillary incisors showed that, when there was a talon cusp on the lateral incisor, 78.3% of the permanent successors exhibited odontogenic abnormalities; mostly in the form of supernumerary teeth. However, a talon cusp on a maxillary central incisor had no effect on the permanent successor. A study of 30 children with supernumerary primary teeth revealed that half of the children with supernumerary primary maxillary lateral incisors also had supernumerary permanent successors. A further study of 182 children with missing primary mandibular incisors showed that normal permanent successors were present in 50% of the cases with missing central incisors but only 8.5% of cases with missing lateral incisors. The prevalence of dental anomalies in the primary dentition of a local southern Chinese population differed from that of Caucasians. Children with talon cusp on primary maxillary lateral incisors, missing mandibular incisors and supernumerary maxillary lateral incisors were found to be at high risk of having an odontogenic abnormality in the permanent dentition. Clinicians should be aware of these anomalies and prepared to implement appropriate treatment.
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Dentistry
Doctoral
Doctor of Philosophy
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3

Edgar, Heather Joy Hecht. "Biological Distance and the African American Dentition." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1039193040.

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4

Schols, Joannes Gertrudis Joseph Hubertus. "Gebissentwicklung und gesichtswachstum in der adoleszenz een wetenschappelijke proeve op het gebied van de geneeskunde en tandheelkunde /." Heidelberg : Alfred Huethig Verlag, 1988. http://books.google.com/books?id=V0FqAAAAMAAJ.

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5

Tsai, Shin-ju Jennie. "The prevalence of anomalies and traits in the permanent dentition of 12 years old southern Chinese." [Hong Kong] : Faculty of Dentistry, The University of Hong Kong, 1996. http://sunzi.lib.hku.hk/HKUTO/record/B38628004.

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6

Magitot, Émile. "Étude sur le développement et la structure des dents humaines, accompagnée de deux planches gravées sur cuivre thèse pour le doctorat en médecine présentée et soutenue le 29 décembre 1857 /." Paris : BIUM, 2003. http://www.bium.univ-paris5.fr/histmed/medica/cote?TPAR1857x287.

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7

Sollier, Alice. "L'état de la dentition chez les enfants idiots et arriérés : contribution à l'étude des dégénérescences dans l'espèce humaine avec 32 figures dans le texte thèse pour le doctorat en médecine présentée et soutenue le 27 octobre 1887 /." Paris : BIUM, 2003. http://www.bium.univ-paris5.fr/histmed/medica/cote?TPAR1888x004.

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8

Worcester, Cynthia E. "Phenotypic Plasticity of Oral Jaw Dentition in Archosargus Probatocephalus." TopSCHOLAR®, 2012. http://digitalcommons.wku.edu/theses/1215.

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Phenotypic plasticity, the capacity of a single genotype to exhibit variable phenotypes in different environments, is common in many species. A sample of wild caught Archosargus probatocephalus, also known as sheepshead, from Florida was randomly divided into two treatment groups: one group was fed soft prey, Mercenaria sp. muscle tissue, and the other group was fed hard prey, Mercenaria sp. in the shell, for 365 days. It was hypothesized that the sheepshead fed hard prey would have a thicker tooth enamel layer containing more calcium, and therefore be stronger than the tooth enamel layer of those fed soft prey items. Additionally, the mean functional jaw surface area, the percentage of tooth coverage of functional jaw surface, number of teeth per jaw, correlation between standard length and mean total tooth height, and the combined surface area of the teeth, when compared between the two treatments, should be greater in the hard prey treatment. The seventeen jaws of two prey groups were acquired postmortem and each jaw was divided into four quadrants. The largest tooth in each quadrant was removed from the jaw, longitudinally sectioned, and examined using scanning electron microscopy (SEM) to measure the enamel and dentin layers. Using the SEM backscatter electron detector the elemental composition of the different layers was determined at multiple locations. Finally, data was analyzed using analyses of variance (ANOVA’s) to compare mean tooth height, calcium content in enamel and dentin layers, mean functional jaw number of teeth per jaw, and upper to lower jaw overall enamel and dentin thickness between each treatment. Phenotypic plasticity was identified in three areas: percentage of jaw surface covered by teeth, a positive correlation between total tooth height and enamel height in hard prey treatment, and a positive correlation between total tooth height and soft prey treatment dentin height; but not in the other areas studied. It is apparent that phenotypic plasticity can increase an individual’s ability to survive in a variable food resource environment by changing some aspects of tooth morphology, but the ability to change in response to stimuli was not found in all areas of tooth structure. i
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9

Marangoni, Pauline. "Unraveling development and ageing dynamics of the rodent dentition." Thesis, Lyon, École normale supérieure, 2014. http://www.theses.fr/2014ENSL0965/document.

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L’évolution de la denture des vertébrés est un sujet majeur et des plus intéressants en biologie développementale évolutive (évo-dévo). Dans ce domaine, la souris Mus musculus est traditionnellement l’animal modèle utilisé. La denture de la souris inclus quatre incisives à croissance continue et douze molaires présentant une organisation caractéristique de leurs cuspides. Le réseau moléculaire régulant le développement de ces deux types de dents est très spécifique.La cascade ERK-MAPK est impliquée lors de différentes étapes du développement dentaire. Une étude comparée du phénotype des molaires de souris mutantes pour des gènes activés à différents points de la cascade a démontré l’existence d’un phénotype caractéristique, à savoir la présence d’une dent surnuméraire en position mésiale des rangées de molaires, ainsi que la présence d’anomalie dans le nombre et la forme de certaines cuspides. Parmi ces caractères présents chez les mutants, certains rappellent des caractères ancestraux présents uniquement chez des rongeurs fossiles. Ceci appuie le rôle que la cascade ERK-MAPK a pu jouer au cours de l’évolution de la denture chez les rongeurs. En travaillant sur une lignée transgénique sur-exprimant un inhibiteur de cette cascade, j’ai pu perfectionner notre connaissance du rôle des gènes de la famille Fgf dans les processus de mise en place des centres de signalisation dentaire et de minéralisation de l’émail.Si l’on considère les incisives à croissance continue, la denture de la souris est dynamique à l’échelle de la vie d’un individu. Réalisant un suivi des incisives supérieures d’une cohorte de souris au cours de leur vieillissement, j’ai pu préciser la chronologie d’apparition de défauts liés au vieillissement. Ces défauts apparaissent sur les incisives à partir de six mois, et le plus fréquent est le développement d’un sillon visible sur l’émail de l’incisive. J’ai enfin utilisé des techniques de séquençage de nouvelle génération (NGS) pour comprendre les bases moléculaires du vieillissement des niches de cellules souches des incisives. Ce faisant, j’ai détecté des changements dans les profils d’expression de gènes régulant le maintien des cellules souches, la prolifération cellulaire et le métabolisme. La présence d’un sillon apparaît corrélée à une forte réponse immunitaire détectée dans les tissus dentaires, ce qui constitue une perspective d’étude majeure dans le but d’achever la caractérisation du vieillissement des cellules souches dentaires
The evolution of the vertebrate dentition is among the most exciting topics in the evo-devo field, with particular attention being drawn to the mouse model. The mouse dentition includes four ever-growing incisors and twelve molars with a specific cusp pattern. Incisors and molars develop according to a tightly regulated molecular network.The ERK-MAPK cascade is involved at various stages of tooth development. Molar tooth phenotype comparisons in mutant mice for genes acting at various levels of the cascade highlighted a dental phenotype signature, which consists in the presence of a supernumerary tooth and shared cusp pattern defects. Some of these recall characters present in fossil rodents, supporting the ERK-MAPK as a good candidate to explain some evolutionary trends of the rodent dentition. By working on a mouse line over-expressing one of this pathway inhibitor in the oral epithelium, I perfect our understanding of Fgf gene role in specifying signaling center formation at the right stage, and in achieving correct mineralization.When considering evergrowing incisors, mouse dentition is also dynamic at the lifetime scale. I monitored the ageing process of the mouse upper incisors, and provided a chronology of occurrence of the variety of age-related defects display. These defects are set up from the six months on, the most frequent abnormality being the presence of an enamel groove along the surface of the incisor. Using Next Generation Sequencing technologies, I detected transcriptomic changes in the stem cell niches affecting cell proliferation and metabolism, as well as the stem cell niche functioning. The correlation found between the groove occurrence and a large immune response in dental tissues expands our concern for dental stem cell ageing
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10

Kim, Pius Joon-Young. "Quantitative assessment of Class II malocclusion in mixed dentition." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21091.pdf.

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11

Townsend, Grant Clement. "Genetic studies of morphological variation in the human dentition /." Title page, contents, preface and overview only, 1994. http://web4.library.adelaide.edu.au/theses/09D/09dt748.pdf.

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12

Ling, Yu-kong John. "A morphometric study of the dentition of 12 year old Chinese children in Hong Kong /." [Hong Kong] : University of Hong Kong, 1992. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1329006X.

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13

McKenna, J. J. I. "A qualitative and quantitative analysis of the anterior dentition visible in photographs and its application to forensic odontology." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B31207844.

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14

蔡欣汝 and Shin-ju Jennie Tsai. "The prevalence of anomalies and traits in the permanent dentition of 12 years old southern Chinese." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B38628004.

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15

Lazzari, Vincent. "Origine et évolution du plan dentaire "murin" chez les Muroidea (Rodentia, Mammalia) : apports de la paléontologie, de la morphologie fonctionnelle et du développement dans l'étude d'une innovation évolutive." Montpellier 2, 2006. http://www.theses.fr/2006MON20192.

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16

Hart, James Clinton. "Genetic and Genomic Bases of Evolved Increases in Stickleback Dentition." Thesis, University of California, Berkeley, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10817049.

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Evolution—the great tinkerer—has produced the astounding diversity of form within and between existing species. It is a fundamental goal of evolutionary biology to understand the origin of such diversity. What types of genes underlie evolved changes in morphology? Are certain types of mutations (notably changes within regulatory regions) more likely to be used to produce adaptive changes in form? When distinct populations evolve similar morphological changes, are the underlying genetic bases changes to the same genes, the same genetic pathways, or largely independent? Are changes in form modular, or are their concerted changes to multiple developmentally similar organs? The ever cheapening cost of sequencing, coupled the availability of high-quality reference genomes, allows high-throughput approaches to identifying the loci of evolution. The emergence of a robust genome engineering system, CRISPR/Cas9, allows for efficient and direct testing of a gene's phenotype. Combining both of these techniques with a model system with naturally evolved phenotypic variation, the threespine stickleback, allows for systems-level answers to the many evolutionary questions.

Chapter one outlines the field of evolutionary developmental biology. It proposes two alternative viewpoints for thinking about the evolution of form. The first is the view of the `Modern Synthesis', linking Mendelian inheritance with Darwinian natural selection, which explains evolution as the change in allele frequencies over time. The second views evolution through the lens of deep homology, focusing on changes to developmental programs over time, even across related organs within the same animal. It then introduces key concepts within evolutionary and developmental biology, including cis-regulation of gene expression, and gene regulatory networks. It then provides examples of evolution reusing similar gene regulatory networks, including Hox genes, Pax6 dependent eye initiation, and ectodermal placode development. Teeth use highly conserved signaling pathways, during both their initiation and replacement. Threespine sticklebacks Gasterosteus aculeatus have repeatedly adapted following a shift from marine to freshwater environments, with many independently derived populations sharing common morphological traits, including a gain in tooth number. The following chapters investigate this gain in tooth number in multiple distinct populations of sticklebacks.

Chapter two describes the discovery and mapping of a spontaneous stickleback albino mutation, named casper. casper is a sex-linked recessive mutation that results in oculocutaneous albinism, defective swim bladders, and blood clotting defects. Bulked segregant mapping of casper mutants revealed a strong genetic signal on chromosome 19, the stickleback X chromosome, proximal to the gene Hps5. casper mutants had a unique insertion of a G in the 6th exon on Hps5. As mutants in the human orthologue of Hps5 resulted in similar albino and blood clotting phenotypes, Hps5 is a strong candidate underlying the casper phenotype. Further supporting this model, genome editing of Hps5 phenocopied casper. Lastly, we show that casper is an excellent tool for visualizing the activity of fluorescent transgenes at late developmental stages due to the near-translucent nature of the mutant animals.

Chapter three details the fine mapping of a quantitative trail locus (QTL) on chromosome 21 controlling increases in tooth number in a Canadian freshwater stickleback population. Recombinant mapping reduced the QTL-containing region to an 884kb window. Repeated QTL mapping experiments showed the presence of this QTL on multiple, but not all, wild derived chromosomes from the Canadian population. Comparative genome sequencing revealed the perfect correlation with genetic data of ten variants, spanning 4.4kb, all within the 4 th intron of the gene Bmp6. Transgenic analysis of this intronic region uncovered its role as a robust tooth enhancer. TALEN induced mutations in Bmp6 revealed required roles for the gene in stickleback tooth development. Finally, comparative RNA-seq between Bmp6 wild-type and mutant dental tissue showed a loss of mouse hair stem cell genes in Bmp6 mutant fish teeth, suggesting deep homology of the regeneration of these two organs.

Chapter four investigates the evolved changes in gene expression that accompany evolved increases in tooth number in two distinct freshwater populations. Independently derived stickleback populations from California and Canada have both evolved increases in tooth number, and previous work suggested that these populations used distinct genetic changes during their shared morphological changes. RNA-seq analysis of dental tissue from both freshwater populations compared to marine revealed a gain in critical regulators of tooth development in both freshwater populations. These evolved changes in gene expression can be partitioned in cis changes (mutations within regulatory elements of a gene) and trans changes (changes to the overall regulatory environment) using phased RNA-seq data from marine-freshwater F1 hybrids. Many genes show evidence for stabilizing selection of expression levels, with cis and trans changes in opposing directions (Abstract shortened by ProQuest.).

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17

Chinadet, Wannapa. "Validation of Mixed Dentition Analysis Method for Northern Thai Population." Thesis, The University of Alabama at Birmingham, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10264243.

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The purpose of this study is to determine the accuracy of the Tanaka-Johnston mixed dentition analysis method and develop a new predictive model for Northern Thai population.

A total of 400 sets of dental study casts (145 males and 255 females) were obtained from the Department of Pediatrics and Orthodontics at the Chiang Mai University School of Dentistry, Thailand. The models were obtained from patients that were age 11 to 23 years that consisted of a full permanent dentition. A digital caliper was used to measure the mesiodistal widths of all teeth on dental study models. The sum of the predicted widths for the canines and premolars using the Tanaka-Johnston method in maxilla and mandible were compared with the observed widths. Models for predicting the total width of canines and premolars was generated using linear regression. The coefficient of determination and root mean square error were used to assess the fit and prediction accuracy of the models.

Tanaka-Johnston method underestimated the mesiodistal widths of permanent canines and premolars in both arches of the Northern Thai population ( P<0.0001). Sexual dimorphism was significantly different between Northern Thai males and females for the widths of mandibular incisors, canines and premolars (P<0.05).

The data demonstrated the inaccuracy of Tanaka-Johnston method when applied to Northern Thai population. To help predict crowding in young children, new mixed dentition analysis methods were developed and validated. The data support development of these new methods which increase the predictive accuracy for Northern Thai population.

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18

Naga, Pradeep Bhagavatula Dawson Deborah V. "Fluorosis in the early permanent dentition evaluating gene-environment interactions /." Iowa City : University of Iowa, 2009. http://ir.uiowa.edu/etd/281.

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19

Grierson, Kevin William. "Sex-Related Morphological Differences in the Dentition of Anolis oculatus." W&M ScholarWorks, 1989. https://scholarworks.wm.edu/etd/1539625506.

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20

Bhagavatula, Naga V. R. N. Pradeep. "Fluorosis in the early permanent dentition: evaluating gene-environment interactions." Thesis, University of Iowa, 2009. https://ir.uiowa.edu/etd/281.

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21

Riga, Alessandro <1984&gt. "Environmental influence on the phenotype: Morphological variation in human dentition." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6416/1/riga_alessandro_tesi.pdf.

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This work is about the role that environment plays in the production of evolutionary significant variations. It starts with an historical introduction about the concept of variation and the role of environment in its production. Then, I show how a lack of attention to these topics may lead to serious mistakes in data interpretation. A statistical re-analysis of published data on the effects of malnutrition on dental eruption, shows that what has been interpreted as an increase in the mean value, is actually linked to increase of variability. In Chapter 3 I present the topic of development as a link between variability and environmental influence, giving a review of the possible mechanisms by which development influences evolutionary dynamics. Chapter 4 is the core chapter of the thesis; I investigated the role of environment in the development of dental morphology. I used dental hypoplasia as a marker of stress, characterizing two groups. Comparing the morphology of upper molars in the two groups, three major results came out: (i) there is a significant effect of environmental stressors on the overall morphology of upper molars; (ii) the developmental response increases morphological variability of the stressed population; (iii) increase of variability is directional: stressed individuals have increased cusps dimensions and number. I also hypothesized the molecular mechanisms that could be responsible of the observed effects. In Chapter 5, I present future perspectives for developing this research. The direction of dental development response is the same direction of the trend in mammalian dental evolution. Since malnutrition triggers the developmental response, and this particular kind of stressor must have been very common in our class evolutionary history, I propose the possibility that environmental stress actively influenced mammals evolution. Moreover, I discuss the possibility of reconsidering the role of natural selection in the evolution of dental morphology.
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22

Riga, Alessandro <1984&gt. "Environmental influence on the phenotype: Morphological variation in human dentition." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amsdottorato.unibo.it/6416/.

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This work is about the role that environment plays in the production of evolutionary significant variations. It starts with an historical introduction about the concept of variation and the role of environment in its production. Then, I show how a lack of attention to these topics may lead to serious mistakes in data interpretation. A statistical re-analysis of published data on the effects of malnutrition on dental eruption, shows that what has been interpreted as an increase in the mean value, is actually linked to increase of variability. In Chapter 3 I present the topic of development as a link between variability and environmental influence, giving a review of the possible mechanisms by which development influences evolutionary dynamics. Chapter 4 is the core chapter of the thesis; I investigated the role of environment in the development of dental morphology. I used dental hypoplasia as a marker of stress, characterizing two groups. Comparing the morphology of upper molars in the two groups, three major results came out: (i) there is a significant effect of environmental stressors on the overall morphology of upper molars; (ii) the developmental response increases morphological variability of the stressed population; (iii) increase of variability is directional: stressed individuals have increased cusps dimensions and number. I also hypothesized the molecular mechanisms that could be responsible of the observed effects. In Chapter 5, I present future perspectives for developing this research. The direction of dental development response is the same direction of the trend in mammalian dental evolution. Since malnutrition triggers the developmental response, and this particular kind of stressor must have been very common in our class evolutionary history, I propose the possibility that environmental stress actively influenced mammals evolution. Moreover, I discuss the possibility of reconsidering the role of natural selection in the evolution of dental morphology.
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23

Ngesa, James Lwanga. "Applicability of tooth size predictions in the mixed dentition analysis in a Kenyan sample." Thesis, University of the Western Cape, 2004. http://etd.uwc.ac.za/index.php?module=etd&amp.

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24

Autio-Gold, J. (Jaana). "Caries prevention in high-risk preschool children in the United States." Doctoral thesis, University of Oulu, 2005. http://urn.fi/urn:isbn:9514277058.

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Abstract Dental caries is a common infectious disease affecting young children living in low-income families in the United States. Efficacious, safe, feasible and cost-effective caries prevention methods for these children are essential. Several studies have shown the efficacy of fluoride varnish and xylitol to improve the oral health of children. The efficiency of caries prevention programs including the use of fluoride varnish or xylitol chewing gum in early childhood has not been well documented in communities with private dental services. The purpose of this study was to determine the caries prevalence and distribution in the primary dentition, and to evaluate the effectiveness of two prevention programs, including applications of fluoride varnish and the use of xylitol chewing gum in randomized groups of preschool children attending Head Start school programs in Northern Florida. The caries preventive effect of fluoride varnish in the primary dentition was evaluated in a sample of 4–6 year-old Head Start schoolchildren in Alachua, Florida (n = 142). Caries progression after nine months was analyzed using dmf(s/t) and ds values. A modified caries scoring system, which differentiates between active and inactive carious lesions, was used to evaluate the effect of fluoride on early noncavitated enamel lesions. The effect of xylitol gum was evaluated by measuring the levels of salivary mutans streptococci before and after a three week chewing period in 3–5 year-old children attending the Head Start school in Starke, Florida (n = 61). This study is in line with earlier reports that caries prevalence is high in Head Start preschool children. This study showed that active noncavitated enamel lesions were common in the primary dentition and that applications of fluoride varnish may offer an effective means of arresting these early enamel lesions. Chewing the xylitol gum reduced the levels of salivary mutans streptococci, thereby possibly reducing the risk for dental caries in these children. While the detection and monitoring of early enamel lesions is critical in determining effectiveness of prevention therapy, this study suggests that fluoride varnish applications may offer an efficient, non-surgical treatment for decay in children. Also, the prevention program with xylitol may provide an additional method to be used in situations where other prevention methods are difficult to implement.
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25

Moreau-Pascal, Dominique. "Alimentation et denture chez les hominidés." Bordeaux 2, 1988. http://www.theses.fr/1988BOR20017.

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26

Lin, Fan. "Isolation and characterization of the intracellular granules from the dental follicle and stellate reticulum of rat molars." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc798377/.

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The purpose of this study was to isolate a relatively pure population of granules from the DF and SR of 7 day old rats and characterize them biochemically. If this could be accomplished, the next step was to determine if the granule proteins may play a role in tooth eruption.
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27

Ramberg, Per. "Studies on d̲e̲ n̲o̲v̲o̲ plaque formation in man." Göteborg : Dept. of Periodontology, Faculty of Odontology, Göteborg University, 1995. http://books.google.com/books?id=Zko0AAAAIAAJ.

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28

Harila, V. (Virpi). "The effect of preterm birth on the development of the dentition." Doctoral thesis, University of Oulu, 2004. http://urn.fi/urn:isbn:9514274393.

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Abstract The aim of this study was to examine the effect of preterm birth on the development of the dentition. The spesific aims were to examine the effect on deciduous and permanent tooth crown dimensions, the eruption of permanent teeth and the sagittal occlusal relationships within the dentition. The subjects consisted of 328 prematurely born (< 37 gestational weeks ) white and black children and 1804 control children, who participated in the cross-sectional study of the Collaborative Perinatal Project (USA) in the 1960's and 1970's. Dental examinations, including dental casts were performed at the age of 6–12 years. Tooth crown size measurements, recording of the sagittal occlusal relationships and tooth eruption stages were performed by examining the dental casts. In general larger permanent tooth crown dimensions were found in preterm white boys and black girls and smaller permanent tooth crown dimensions in preterm white girls and black boys. There were both increased and decreased deciduous tooth crown dimensions in preterm children compared to controls, but no significant differences were found. Boys had larger tooth crown sizes than girls within all preterm and control groups showing sexual dimorphism. The results showed earlier eruption of permanent incisors and first molars in all preterm children compared to controls and also according to sex and race. Concerning the sagittal occlusal relationships, the results showed greater prevalence of prenormal canine relationships in preterm group than in the controls. When the molar relationships were concerned, the prevalence of mesial molar occlusion was greater in the preterm group. The incidence of bilateral symmetrical canine relationship was the same in both preterm and control groups, but inside the preterm group the girls had better symmetry than the boys. The findings of this research suggest that short gestation is not associated with reduced permanent and deciduous tooth crown dimensions in prematurely born children and also confirm the presence of the sexual dimorphism in tooth crown size. The studies also indicate that the clinical tooth eruption is accelerated in all observable permanent teeth in prematurely born children. The findings of occlusal morphology indicated that premature birth may effect the sagittal occlusal development. General health condition, neonatal and postnatal factors like intubation, postnatal molding of head shape and the importance of catch-up growth and early functional activity should be considered as possible influencing factors. Preterm birth may also interfere with the development of symmetry and lateralization.
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29

Tongkoom, Subongkoch. "The prevalence of dental anomalies in the primary dentition of Chinesechildren." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31953980.

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30

Ahmad, N. S. B. "Dental development timings of primary and permanent dentition among UK population." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1363078/.

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Introduction: Methods to determine a child’s growth and development are of a great value for both medical and dental practice. Growth has been used as an indicator of health worldwide. Normal development is measured from growth charts and any developmental delay can be recognized early. Teeth are the most frequently used part of the body analyzed for age estimation. Aim & Objectives: 1. To revise the dental development timings for permanent teeth (excluding third molars) among the UK population using dental radiographs and produce reference data for different ethnic groups. 2. A pilot study to revise dental development timing for primary teeth using post mortem study of MRI and CT scan (MaRIAS) data. Methods: Cross sectional study of radiographs of children attending Eastman Dental Hospital and MaRIAS images (MRI and CT Scan) of fetuses, infants and children at Great Ormond Street Hospital. Tooth development stages (TDS) were assessed using Demirjian’s staging system for permanent teeth and the modified Demirjian’s staging system for primary teeth, to produce mean ages of attainment for tooth initiation, crown completion and root completion. The mean age of attainment of each TDS was produced. Gender and different ethnic groups were compared where appropriate. Results: 1. In total, 183 cases from post-mortem study of MRI and CT scan were assessed (MaRIAS). Of these, 81 cases showed primary teeth, of which 45 (56%) were included in the analysis. Mean ages of attainment of TDS in primary teeth were produced. 2. Three hundred seventy six (376) radiographs of young children and adolescents and 34 MaRIAS images, were assessed to obtain data on the early developing permanent teeth, as this information was lacking from the DAA database. The mean age of attainment of TDS for upper and lower left teeth were produced. 3. Of 5333 subjects in DAA database, 4397 were analysed to compare the mean age of attainment between ethnic groups. Gender considered separately. Conclusion: The primary teeth started to develop in intra-uterine phase. In permanent teeth, females developed earlier than males and there were significant differences when White, Asian and Black groups were compared.
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31

DePalo, Joseph. "Silver diamine fluoride and interproximal caries progression in the primary dentition." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1560622950433902.

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Miettunen, Katie Elizabeth. "Multidisciplinary assessment of orthodontic treatment outcome for the adult mutilated dentition." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/202771.

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Oral Biology
M.S.
Orthodontic treatment in the adult is not new. Until lately, the challenges of treating the adult patient kept their numbers low. Over the last thirty years, however, there has been a steady increase in the prevalence of adults seeking orthodontic treatment. Many adults present with a mutilated dentition that often require a multidisciplinary approach for optimal treatment outcomes. Currently, guidelines for the evaluation of adult orthodontic treatment outcomes do not exist. The purpose of this study was to determine which factors are considered most important for the evaluation of the quality of adult orthodontic treatment outcome of patients with a mutilated dentition by practicing orthodontists, periodontists, and restorative dentists. In this study, orthodontists, periodontists, and restorative dentists examined the records of ten adult patients in the mutilated dentition who received orthodontic treatment at Temple University in the Department of Orthodontics. This study was approached from both a quantitative and qualitative perspective. Two surveys were used to collect the data. One survey used a visual analogue scale to measure the overall result, occlusion, buccal bone height, periodontal health, restorability, case difficulty, and the amount of influence of the American Board of Orthodontics (ABO) standards when judging the cases. A second survey was used to determine if the examiner was ABO certified and asked a series of open-ended questions related to orthodontic treatment outcome. Based on the data collected, the following conclusions were drawn: 1. Orthodontists, periodontists, and restorative dentists are consistent in their rating of orthodontic treatment outcome. 2. Periodontists and restorative dentists rate overall case finish and posttreatment occlusion higher than orthodontists. 3. When evaluating case finish, orthodontists tend to blend what is optimal as described by the guidelines of the American Board of Orthodontics with what is reasonably achievable for the patient. 4. Orthodontists, periodontists, and restorative dentists rate the following five factors to be most important when evaluating orthodontic treatment outcome: esthetics, occlusion, restorability, periodontal health, and stability. 5. Orthodontists, periodontists, and restorative dentists rate esthetics as the most important factor to use for evaluating orthodontic treatment outcome. The data suggest that adult patients with mutilated dentitions can pursue orthodontic treatment and achieve an excellent result. Teamwork among all dental specialists providing treatment is essential for multidisciplinary treatment. Treatment goals among all providers must be aligned to reach the ultimate treatment goals.
Temple University--Theses
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33

Lindquist, Birgitta. "Mutans streptococci in human dentition some factors influencing colonization and distribution /." Göteborg : University of Göteborg, 1991. http://catalog.hathitrust.org/api/volumes/oclc/25383720.html.

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34

Springbett, Susan. "Tooth wear in the deciduous dentition : a cross cultural and longitudinal study /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09DM/09dms769.pdf.

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35

Thomas, Bethan Louise. "The role of Dix-2 in the early development of murine dentition." Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286738.

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36

Rossouw, Paul Emile. "A longitudinal study of the stability of the dentition following orthodontic treatment." Thesis, Stellenbosch : Stellenbosch University, 1992. http://hdl.handle.net/10019.1/70107.

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Thesis (PhD) -- Stellenbosch University , 1992.
ENGLISH ABSTRACT: The maintenance of dental alignment following orthodontic treatment has been, and continues to be, a challenge for the orthodontist (McReynolds and Little, 1991). Orthodontists should endeavour to establish normal occlusions and function to the end that physiologic balance and retentive stability may be achieved (Goldstein, 1953). Many philosophies and theories have been formulated in response to this challenge, but few have successfully withstood the test of rigorous post-orthodontic evaluation. The present study comprises longitudinal assessments of dentofacial changes which occurred in South African Caucasian subjects during their orthodontic treatment as well as a mean of 7 years following active treatnent. The sample consists of 88 Caucasian subjects; 33 males and 55 female sUbjects who have undergone conventional edgewise orthodontic treatment (Lindquist; 1985). The treatment includes extraction (56%) and nonextraction (44%) therapy. Due to the intricate structure of the craniofacial complex, it is deemed important to discuss the major components of this complex separately and then to compare the variables describing the area with post-orthodontic lower incisor crowding. Lower incisor crowding or irregularity, most often referred to as relapse when occurring in the post-orthodontic dentition, is a phenom~non that is clinically visible and easily assessed using the Little Irregularity Index (Little, 1975). A variety of orthodontic study cast and cephalometric variables represent the changes which occur at the three time intervals selected for this study, namely pre-treatment (T1), post-treatment (T2) and following active treatment (T3). statistical analysis of th~ data was undertaken by the Institute for Biostatistics of the Medical Research Council, Tygerberg, RSA utilising the SAS (1985). The significance level of the results of this study is set at p = 0.05. x No previous study has documented the evaluated and described the various craniofacial skeleton in this format. literature parts or has of the The thesis is divided into thirteen chapters.
AFRIKAANSE OPSOMMING: Die instandhouding van tandbelyning na voltooiing van ortodontiese behandeling was en sal nag steeds in die toekoms 'n uitdaging bied vir ortodontiste (McReynolds en Little, 1991). Die ortodontis se strewe moet wees am 'n normale okkli'lsie in die ortodontiese pasient te veE)tig, waartydens die funksie van die kake herstel word, asook fisiologiese harmonie en stabiliteit van die okklusie gevestig ~lOrd (Goldstein, 1953) • Menige filosofiee en teoriee is al voorgestel om hierdie doelwitte te kan bereik, maar baie min het nag daarin geslaag. Tydens die huidige longitudinale studie is gepoog om In ondersoek te doen van die veranderinge wat plaasvind in die dentofasiale omgewing van agt-en-tagtig Suid-Afrikaanse Kaukasiese pasiente tydens hulle ortodontiese behandeling, asook na die verloop van 'n gemiddeld van sewe jaar sedert die behandeling voltooi was. Die monster het uit 33 manlike en 55 vroulike pasiente bestaan wat met 'n konvensionele vierkantsdraad ("edg~wise") ortodontiese tegniek behandel was (Lindquist, 1985). Die behandeling het 56% ekstraksie en 44% ni~-ekstraksie behandelingsbeplannings ingesluit. Weens die baie komplekse kraniofasiale omgewing is dit besluit am elke deel waaruit hierdie omgewing bestaan, afsonderlik te beskryf en te bespreek. Die veranderlikes wat elke deel beskryf is vervolgens gekorreleer met die na-behandelings ondersnytand-bondeling. Ondersnytandbondeling is 'n verskynsel wat klinies sigbaar is en meestal na verwys word as terugval indien dit voorkom in die na-behandelings resultaat. Dit kan maklik gemeet word met behulp van die "Little Irregularity Index" (Little, 1975). 'n Verskeidenheid van ortodontiese studiemodelle en kefalometrie~Je verander.likes is tydens die voor-behandelings (T1), na-behandelings (T2) asook na verloop van 'n gemidd.eld van sewe jaar na afhandeling van die behandeling (T3) gemeet. Die statistiese verwerkinge is deuI' die Institu,ut vir Biostatistiek van die Mediese Navorsingsraad, Tygerberg, R.S.A. gedoen deur middel van die SAS (1985). Die betekenisvolheidsperk van die studie is op P = 0.05 gestel. Geen studie het al voorheen die literatuur gedefineerde areas van die kranio-fasiale skelet formaat ondersoek of be~kryf nie. Die proefskrif bestaan uit dertien hoofstukke.
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Garvey, Samuel T. "A new high-latitude Tylosaurus (Squamata, Mosasauridae) from Canada with unique dentition." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1584001060097071.

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38

Tongkoom, Subongkoch. "The prevalence of dental anomalies in the primary dentition of Chinese children." [Hong Kong] : Faculty of Dentistry, the University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19902220.

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39

Nawaz, Muhammad Ali. "Dietary Pattern And Dental Caries Of The Deciduous Dentition In Young Children." Thesis, Faculty of Dentistry, 1990. http://hdl.handle.net/2123/4601.

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40

Glendor, Ulf. "On Dental Trauma in Children and Adolescents : Incidence, Risk, Treatment, Time and Costs." Doctoral thesis, Linköpings universitet, Socialmedicin och folkhälsovetenskap, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5016.

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Background: Dental trauma occur in childhood and adolescence with consequences in time and costs for both patient and family. The scientific knowledge of these matters is scarce. For some individuals, dental trauma will result in long, time-consuming and costly treatments in childhood which will continue into adulthood. Aim: The thesis aimed to increase the knowledge of incidence, risk, treatment, time and costs spent on dental traumas to primary and permanent teeth in children and adolescents. Material and method: The material for the studies emanated from the county of Västmanland, Sweden, and the municipality of Copenhagen, Denmark, and from a Swedish nation-wide material (Folksam). The material was collected from accident reports, dental files, dental trauma forms, questionnaires and telephone interviews. Descriptive, prospective and analytical methods were used. A classification of uncomplicated and complicated dental traumas was presented. Results: The incidence of dental trauma to boys was higher, compared to girls, in the county of Västmanland in almost all age groups. For both sexes, the first years in life and the first years in school were the most accident prone periods with incidence twice as high as the average incidence for all children and adolescents in the county. Every third trauma was complicated with injuries to the pulp or periodontal ligaments. Every second patient with a dental trauma to permanent teeth suffered from multiple dental trauma episodes (MDTE) during a period of 12 years. In almost every second patient with MDTE, at least one of the affected teeth had sustained repeated trauma episodes. The risk of sustaining MDTE increased when the first trauma episode occurred in the age interval of 6-10, compared to 11-18 year olds. During a 12-year period, treatment times for complicated traumas were 2.0 and 2.7 times higher for primary and permanent teeth, respectively, compared to corresponding values for uncomplicated traumas. On average, direct time (treatment time) represented 11% and 16% of the total time, while the direct costs (health are service, transport, loss of personal property and medicine) represented 60% and 72% of the total costs of traumas to primary and permanent teeth, respectively, during a 2-year period for cases of a nation-wide material. Conclusion: Dental traumas are frequent and some individuals are injured several times. Besides treatment time, efforts from the family are substantial in time and costs. Parameters such as degree of severity, access to treatment and place of injury are of major importance to both patient and family and should be considered when calculating time and costs of dental trauma in children and adolescents.
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Assunção, Luciana Reichert da Silva. "Avaliação do traumatismo em dente decíduo e da seqüela no dente permanente sucessor /." Araçatuba : [s.n.], 2005. http://hdl.handle.net/11449/95462.

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Resumo: Estudos mostram que os traumatismos na dentição decídua são comuns, podendo trazer também comprometimentos aos dentes permanentes em desenvolvimento. O propósito desta pesquisa foi avaliar os traumatismos em dentes decíduos e as seqüelas nos dentes permanentes sucessores, em crianças atendidas no Pronto Atendimento da Bebê Clínica, da Universidade Estadual de Londrina, entre os anos de 1992 a 2002. Da análise de 1703 prontuários que apresentavam relato de traumatismos nos dentes decíduos, 864 atenderam os critérios de inclusão propostos para este estudo, sendo que 409 crianças foram localizadas e compareceram ao local de exame. Os prontuários destas crianças foram estudados a fim de se obter informações a respeito do trauma. O exame clínico e radiográfico foi realizado com o objetivo de verificar as seqüelas nos dentes permanentes em decorrência dos traumatismos nos antecessores decíduos. Para a análise destas seqüelas, a amostra foi dividida em 2 grupos, sendo o Grupo I constituindo as crianças com apenas uma ocorrência de traumatismo nos dentes decíduos e o Grupo II, aquelas com mais de uma ocorrência. A freqüência de injúrias traumáticas nos dentes decíduos foi de 31,9% no total dos 1703 prontuários avaliados. Das crianças examinadas, o gênero masculino foi o mais acometido (57%) e a idade da criança no momento do trauma entre 6 e 24 meses, a mais observada (38,4%). As quedas de uma forma geral, e entre estas, aquelas causadas pelo andar e correr foram os fatores etiológicos mais predominantes (37,8%). O tempo decorrido entre o trauma e a procura por atendimento foi mais averiguado no periodo de até 1 dia (43,5%). Dos 679 dentes decíduos avaliados, o incisivo central superior direito foi o mais afetado (42,0%) e a subluxação, o tipo de traumatismo mais prevalente ...(Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Studies show dental trauma in primary teeth as common happening and the risk of compromising the permanent teeth in developing process. The purpose of this research was to evaluate the dental trauma in primary teeth and its sequelae in the successor permanent teeth in children attended at Pronto Atendimento da Bebê Clínica, State University of Londrina, from 1992 to 2002. From the analysis of 1703 children presenting cases of dental trauma in primary teeth, 864 attended the criteria of inclusion proposed to this study. From the total above 409 children were located and came to the examine place. The data of these children were studied in order to obtain precise information regarding trauma. The clinical and radiographic exams were carried out with the objective to verify sequelae in the permanent teeth due to traumas caused on the predecessor deciduous. For the analysis of these sequelae the sample was divided into 2 groups: Group I, consist of children with only one occurrence of trauma in the primary teeth and group II, of those with more occurrences. The frequency of traumatic injuries in the deciduous teeth was 31,9% in total of the 1703 cases evaluated. From the examined children, masculine gender was the most compromised (57%) and the age of the child in the moment of the trauma was between 6 and 24 moths (38,4%). Falls in general, among those caused by walking and runnings were the etiologic predominant factors (37,8%). The time between trauma and seeing the dentist was done in a period of a day (43,5%). From 679 deciduous teeth evaluated, the right maxillary central incisor was the most affected (42,0%) and the subluxation, type of trauma more frequent (32,5%). In regard to the treatment recommended to the primary teeth monitoring was the most used ...( Complete abstract click electronic address below)
Orientador: Robson Frederico Cunha
Coorientador: Antônio Ferelle
Banca: Farli Aparecida Carrilho Boer
Banca: Célio Percinoto
Banca: Robson Frederico Cunha
Mestre
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42

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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43

Viviani, Jérémie. "Dynamique de l'évolution de la denture en rapport avec l'habitat, le comportement et le régime alimentaire chez les poissons perroquets (Scarinae, Labriformes)." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN080.

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Les poissons-perroquets, séparés en deux tribus les Scarini et les Sparisomatini, se sont diversifiés au sein des Labridae à partir d’ancêtres carnivores. L’un des facteurs essentiels pour expliquer cette diversification est leur exploitation d’une nouvelle niche trophique : les microorganismes. La plupart des Sparisomatini paissent des macroalgues pour y extraire les micro-organismes épiphytiques tandis que les poissons-perroquets brouteurs (tous les Scarini, certains Sparisoma) raclent ou creusent le substrat rocheux pour y récolter les microorganismes épilithiques et endolithiques. Ces changements de comportement alimentaire se sont accompagnés de nombreuses évolutions dentaires avec notamment la présence de plaques dentaires chez les brouteurs mais aussi certains paisseurs. Les phylogénies moléculaires ont contredit le précédent scénario évolutif sur la denture des poissons-perroquets qui stipulait l’apparition progressive de plaques dentaires à partir de dentures à dents non recouvertes d’os (dents libre s). Cette thèse se propose de réexaminer l’évolution de la denture chez les poissons -perroquets en se basant sur les progrès phylogénétiques mais aussi techniques (microtomographie 3D), tout en faisant le lien avec leur régime et leur fonction écologique
Parrotfishes, divided into the tribes Scarini and Sparisomatini , are labrid fishes that arouse from carnivorous ancestors. One of the main factors that explain this radiation is the exploitation of microorganisms as a food source. While most Sparisomatini browse macroalgae to get epiphytic microorganisms, grazing parrotfishes (all Scarini and some Sparisoma) scrap or excavate hard substrate to obtain epilithic and endolithic microorganisms. Changes in feeding behaviour are associated with dentition specialization with notably dental plates in grazing but also some browsing parrotfishes. Gene-based phylogenies contradicted the previous evolutionary scenario about parrotfish dentition evolution, which states the progressive emergence of dental plates from non-coalesced dentitions. This thesis manuscript aims to re-examine the evolution of parrotfish dentitions in the light of the new phylogenies by using X-ray 3D microtomography, and to link this evolution with diet and ecology
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44

Lang, Joy. "Masking identity : the use of corrosive and caustic agents on bone and dentition." Honors in the Major Thesis, University of Central Florida, 2001. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/283.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.
Bachelors
Arts and Sciences
Anthropology
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45

Best, Timothy F. "Evaluation of effectiveness, reproducibility, and repeatability of using dentition for estimating cattle age." Thesis, Mississippi State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1570106.

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Study objectives were to determine the effectiveness, reproducibility, and repeatability of dental evaluation for estimating cattle age. Cattle (n = 400) aged 1.5 to 20 yr were evaluated by 3 technicians for estimated age via dentition. A subset (n = 383) was aged again 4 wk later by the same observers. Age estimations were most accurate in YOUNG (≤ 5 yr old) cattle with at least 95.7% rate of accuracy within 2 yr across all observers and observation events. For MIDDLE (6 to 10 yr old) and OLD (> 10 yr old) cattle, these accuracies were 81.5 and 62.1%, respectively. Reproducibility proved high, with all observers consistently assigning age estimates within 1 yr of one another for more than 9 out of 10 YOUNG animals; all observers agreed on at least every 8 out of 10 estimations for all age groups within 3 yr. Repeatability was less consistent.

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46

Esperança, Taís Cristina Dinelli [UNESP]. "Análise do relacionamento e dimensões dos arcos dentários e a influência de hábitos deletérios em crianças com dentição decídua." Universidade Estadual Paulista (UNESP), 2005. http://hdl.handle.net/11449/104505.

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Made available in DSpace on 2014-06-11T19:33:23Z (GMT). No. of bitstreams: 0 Previous issue date: 2005-11-14Bitstream added on 2014-06-13T18:07:29Z : No. of bitstreams: 1 esperanca_tcd_dr_arafo.pdf: 780532 bytes, checksum: 85d4d29a372be7c83e0f8b1ad2f28320 (MD5)
Para o presente trabalho, 286 crianças pertencentes às creches da Prefeitura Municipal de Araraquara foram avaliadas e moldadas com um dispositivo confeccionado com cera utilidade e palito abaixador de língua na forma dos arcos dentários. No intervalo de um ano as mesmas crianças foram remoldadas a fim de se verificar se houveram ou não mudanças nas dimensões do arco dentário decíduo. A partir da obtenção dos modelos em gesso, foram realizadas medições por meio de um dispositivo digitalizador tridimensional denominado MicroScribe-3DX nos instantes inicial (primeira moldagem) e final (moldagem após um ano). Foram avaliadas medidas referentes às distâncias inter-segundos molares, interprimeiros molares, intercaninos, perímetro, comprimento de arco e espaços primatas. Conclui-se que: A maior prevalência de hábitos de sucção ocorre na faixa etária dos 4 aos 5 anos. A má oclusão pode estar presente em pacientes portadores ou não de hábitos de sucção, podendo estes, constituir um dos fatores etiológicos determinantes para a instalação da mesma. A mordida aberta anterior é mais prevalente na faixa etária dos 4 aos 5 anos de idade, podendo estar associada ou não á presença de hábitos de sucção. De acordo com a avaliação longitudinal, as distâncias intersegundos molares, intercaninos, perímetro e comprimento dos arcos tenderam sofrer aumento significativo nos pacientes não portadores de hábitos de sucção. As distâncias inter-segundos molares superiores, interprimeiros molares inferiores e o comprimento dos arcos tenderam a sofrer diminuição significativa nos pacientes portadores de hábito de sucção. Não houve dimorfismo sexual em relação às mudanças dimensionais dos arcos dentários, nem quanto à prevalência dos hábitos nocivos de sucção. Não ocorreram diferenças nas dimensões dos arcos dentários com relação à idade e ao nível... .
For the present study, 286 children from the childcare center of the Araraquara`s city hall were evaluated and molded with an utility wax device and a device shaped to the dental arches designed to keep the tongue lower. After a year, the same children were molded again to verify weather or not there were changes in the dimensions of the primary dental arches. From the manufacturing time of the dental plaster stone models, measurements were made with the MicroScribe-3DX tridimensional digitalizer of the first molding and of the final molding (after one year). The distances were evaluated between the second molars, between first molars, between canines, perimeter, arch length and primary spaces. Conclusion: the greatest prevalence of suction habits happens to be between the ages from 4 to 5. Malocclusion can be present in patients with or without habit of suction, and these habits can be the etiological factor for it to develop.The anterior open bite is more often present at ages from 4 to 5 and it can be associated or not with the presence of suction habits. According to the longitudinal evaluation, the lengths between second molars, between canines, the perimeter and the lengths of the arches tend to have an increase on the patients that didn't develop suction habits. The distances between upper molars, between lower first molars and the length of the arches tend to decrease significantly in the patients that developed suction habits. There were no sexual dimorphism related to changes of dimension of the dental arch concerned with age and social- economic level. The habit of greatest prevalence was the pacifier habit.
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47

McVeigh, Clare. "Variability in human tooth formation : a comparison of four groups of close biological affinity /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ66224.pdf.

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48

Nowjack-Raymer, Ruth Emilie. "The impact of dental status on diet, nutrition and nutritional status in U.S.A. adults." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369229.

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49

Pettenati-Soubayroux, Isabelle. "Anthropologie du vieillissement bucco-dentaire." Aix-Marseille 2, 2001. http://theses.univ-amu.fr.lama.univ-amu.fr/2001AIX20671.pdf.

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50

Andlin-Sobocki, Anna. "Gingival recession, keratinized and attached gingiva in anterior teeth of children." Umeå, Sweden : Dept. of Orthodontics, University of Umeå, 1993. http://catalog.hathitrust.org/api/volumes/oclc/35846640.html.

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