RESUMO
The purpose of the study was to establish normative data on the mesiodistal crown dimensions of Americans of Dominican background. The Bolton tooth size analysis was performed on a sample of 54 Dominican Americans. The mean, range and standard deviation were calculated for the size of the teeth, and a coefficient of variation was obtained for the tooth size ratio. A 2-sample t-test was used to test for the statistical difference between means. In general, the values obtained for the Dominican American sample closely resembled previous data available for the African American population. The tooth size ratios obtained were compared to the Bolton ratios. The overall ratio was found to be 91.3, equivalent to the Bolton overall ratio, whereas the anterior ratio was 78.1, larger than the 77.1 Bolton ratio. The frequency of tooth size discrepancy outside 2 standard deviations from the Bolton mean was also calculated. An overall tooth size discrepancy was found in 11% of our sample, and 28% of the sample presented an anterior tooth size discrepancy.
Assuntos
Dentição Permanente , Odontometria/normas , Dente/anatomia & histologia , Adulto , População Negra , República Dominicana/etnologia , Feminino , Humanos , Masculino , Modelos Dentários , Cidade de Nova Iorque , Odontometria/métodos , Padrões de Referência , Valores de Referência , Coroa do Dente/anatomia & histologia , População BrancaRESUMO
PURPOSE: To evaluate the incidence of occlusal caries and the rates of retention using Variglass VLC (polyacid-modified resin) as an occlusal sealant. MATERIALS AND METHODS: The sample consisted of 185 school children (6-8 yr-old), with sound unsealed permanent first molars. Sealants were applied on the upper and lower first molars from a randomly chosen hemiarch (N=370 teeth). The follow-up was conducted at 6, 12 and 48 months examining 343 (93%), 290 (78%) and 187 (51%) teeth, respectively. RESULTS: After 48 months, total retention of the material was noted in only 5% of the teeth. The presence of sealant in 2/3 and 1/3 of the pit extension was verified in 8% and 14% of the teeth, respectively, while 73% of the sealed teeth had no sealant present on the occlusal surface. Caries incidence, measured by the presence of dental caries and restorations, was 16% representing an annual increase of 4%.