Typescript (photocopy)

Orientador: Frab Norberto Boscolo / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba / Made available in DSpace on 2018-08-04T03:03:12Z (GMT). No. of bitstreams: 1 NascimentoNeto_JoaoBatistaSobrinhodo_D.pdf: 4211709 bytes, checksum: ec4bdd2048b5778b6d45c3286d2e2c39 (MD5) Previous issue date: 2005 / Resumo: Com o propósito de estudar a calcificação dentária de crianças da região metropolitana do Recife, foi utilizada uma amostra de radiografias panorâmicas de 1352 pacientes do sexo masculino e 1346 do sexo feminino, distribuídas entre as faixas etárias de 4 a 15 anos e divididas por trimestre. Em cada radiografia foram avaliados os estágios de calcificação dos incisivos aos segundos molares permanentes, da maxila e da mandíbula, respectivamente, com o auxílio de um diagrama de oito estágios de calcificação preconizado por Nicodemo(1967). Os dados foram apresentados em valores absolutos e percentuais e foram aplicadas técnicas de estatística descritiva e testes estatísticos (teste t-Student). Pela análise dos resultados verificou-se que, de maneira geral, a calcificação dentária ocorreu primeiro nos indivíduos do sexo feminino, indicando uma precocidade do desenvolvimento dentário nas meninas. Existiu uma variação na precocidade do desenvolvimento dos dentes quando os arcos foram avaliados, sendo que para alguns dentes, como o incisivo lateral e canino, a calcificação dentária ocorreu primeiro na mandíbula; nos segundos pré-molares a calcificação ocorreu primeiro na maxila e, nos demais dentes, houve uma variação entre a precocidade para ambos os arcos. Os resultados deste trabalho permitiram traçar um panorama do desenvolvimento da dentição permanente para a população da região do Recife / Abstract: With the intention to study the dental calcification of children of the Recife metropolitan region, it was used a sample of panoramic x-rays of 1352 patients of masculine gender and 1346 of the feminine gender, distributed between the ages of 4 and 15 years old and divided for trimester. In each radiograph, the stage of calcification from the incisors to the second molar ones were evaluated, by means the diagram of eight stages of calcification praised by Demirjian et al. (1973). The data were presented in absolute and percentile values and descriptive statistical techniques were applied (minimum and maximum values, media and standard deviation) and statistical tests (test t-Student). By the analysis of the results it was verified that, in general way, the dental calcification occurred first in the feminine gender, indicating e precocity of the dental development in the girls. A variation in the precocity of the development of teeth existed when the arcs were evaluated, being that for some teeth, as the lateral and canine incisor, the dental calcification occurred first in the lower jaw; in the second pre-molar the calcification occurred first in the upper jaw and, for the other teeth, there was a variation in precocity for both arcs. The results of this work allowed to trace a panorama of the development of the permanent dentition for the population of the region of Recife / Doutorado / Radiologia Odontologica / Doutor em Radiologia Odontológica

Includes bibliographical references (leaves 68-76) Aims to observe changes in the expression of syndecan-1 in both the developing epithelium of the rat oral mucosa, and in epithelial cell rests of Malassez in the developing periodontium of normal rat molars, from late crown development through to early eruption.

Bibliography: leaves 348-366. Elucidates the nature and extent of genetic and environmental contributions to variation in permanent tooth crown size. Sibling correlations are compared to find evidence of sex-linked genes contributing to crown size. This hypothesis was tested by comparing mean tooth size in female-male opposite-sex twins with same-sex twins, and singletons.

Bibliography: leaves 348-366. / x, 366 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Elucidates the nature and extent of genetic and environmental contributions to variation in permanent tooth crown size. Sibling correlations are compared to find evidence of sex-linked genes contributing to crown size. This hypothesis was tested by comparing mean tooth size in female-male opposite-sex twins with same-sex twins, and singletons. / Thesis (Ph.D.)--University of Adelaide, Dept. of Dentistry, 1998

Bibliography: leaves 348-366. / x, 366 leaves : ill. (some col.) ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Elucidates the nature and extent of genetic and environmental contributions to variation in permanent tooth crown size. Sibling correlations are compared to find evidence of sex-linked genes contributing to crown size. This hypothesis was tested by comparing mean tooth size in female-male opposite-sex twins with same-sex twins, and singletons. / Thesis (Ph.D.)--University of Adelaide, Dept. of Dentistry, 1998