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Previous issue date: 2010-09-17 / Since Demirjian's system of estimating dental maturity was first described,
many researchers from different countries have tested its accuracy among
diverse populations. Some of these studies have pointed out a need to
determine population-specific standards. In Brazil, the Northeast region is the
one that most suffers the negative impact of exodus, specially related to the
increase of abandoned children in the cities. The aim of this study was to test
the accuracy of Demirjian's system for assessing the dental maturity of
northeastern Brazilian children, so as to present a scale for maturity score
conversion into dental age developed specifically for this population. This could
be used for forensic, anthropological and legal matters, and also as a model for
other countries attempting to formulate their own conversion scales. Panoramic
radiographs of 1,491 children (821 females and 670 males), aged 7 to 13 years,
from Cear? state, northeast Brazil, were assessed by a single observer to
determine dental age (DA) according to Demirjian's system. The mean
percentage of intra-observer agreement was 86.6%, with a mean Cohen's
Kappa coefficient of 0.67 (substantial agreement). The DA was compared by
paired t-test to subjects' chronological age (CA). The differences between CA
and DA in all age groups were statistically significant (p<0.0001), demonstrating
a great advancement in DA among Brazilians. Scatter plots were drawn for both
genders, and the data were fitted to a growth curve, y = 100/ (1 + e-a(x b)).
Graphs corresponding to the 50th percentile curves were produced. A table with
new values for the conversion of maturity score into dental age for northeastern
Brazilian children is presented. The great advancement in DA, as obtained by
Demirjian's system in this population, justified the determination of specific
scores for dental maturity assessment / A estimativa da maturidade dent?ria tem sido descrita na literatura basicamente
atrav?s de dois m?todos, a observa??o direta do processo de erup??o do dente
na cavidade oral ou por meio de radiografias. A radiografia panor?mica, obtida por
t?cnica extra-oral de uso dos raios X, ? um elemento essencial para o diagn?stico
por imagens em Radiologia odontol?gica. Este trabalho apresenta dois estudos
quantitativos anal?tico-descritivos utilizando o m?todo de determina??o da idade
dental atrav?s de radiografia panor?mica em crian?as brasileiras nordestinas. Um
estudo piloto realizado com 325 crian?as (191 meninas e 134 meninos) de 7 a 16
anos, da cidade de Fortaleza, objetivando determinar as interrela??es entre as
suas idades cronol?gica (data de nascimento), ?ssea (pelo m?todo de Grewlich &
Pyle) e dental (segundo Demirjian et al.). Outro estudo, j? publicado, conduzido
com 1.491 crian?as (821 meninas e 670 meninos) cearenses, de 7 a 13 anos,
visando avaliar a aplicabilidade do m?todo de Demirjian na popula??o estudada.
Em ambos os estudos, mostra-se que a estimativa de idade dental utilizando as
tabelas de convers?o de maturidade dental propostas por Demirjian et al. n?o se
ad?qua ? popula??o pesquisada. Assim, uma escala de valores de convers?o de
maturidade dental em idade dental foi desenvolvida especificamente para
crian?as nordestinas e ? agora apresentada, visando ? sua aplica??o n?o s? na
cl?nica, mas em quest?es forenses, antropol?gicas, legais e/ou criminais. As
pesquisas de car?ter interdisciplinar envolveram pesquisadores das ?reas de
Odontologia (Odontopediatria, Ortodontia e Radiologia); Medicina (Endocrinologia
e Metabologia); e F?sica, preenchendo os requisitos de multidisciplinaridade do
Programa de P?s-Gradua??o em Ci?ncias da Sa?de
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/13200 |
| Date | 17 September 2010 |
| Creators | Maia, Maria Cristina Germano |
| Contributors | CPF:26277573349, http://lattes.cnpq.br/7505856827379763, R?go, Delane Maria, CPF:42319501487, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4767523H1, Leite, L?cia Dantas, CPF:02634374429, http://lattes.cnpq.br/7939303011096805, Lima, Danilo Lopes Ferreira, CPF:27275779315, http://lattes.cnpq.br/1815947099924439, Saintrim, Maria Vieira de Lima, CPF:00334936349, http://lattes.cnpq.br/4640029618752231, Silva, Carlos Ant?nio Bruno da |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncias da Sa?de, UFRN, BR, Ci?ncias da Sa?de |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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