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Resumen Objetivo: describir el comportamiento, distribución y severidad de las lesiones de caries en las superficies oclusales de los segundos molares permanentes. Relacionarlo a su etapa de erupción y presencia de actividad en el resto de la cavidad bucal. Metodología: Se realizó un estudio descriptivo en una muestra de conveniencia de 100 adolescentes, de ambos sexos, (edad promedio=13,39±0,94 años). Los padres respondieron un cuestionario sobre aspectos socioeconómicos y salud general y los adolescentes sobre dieta y hábitos de higiene. Dos examinadoras calibradas realizaron el examen clínico de acuerdo a los criterios de ICDAS II en todas las superficies erupcionadas, así como el mapeo de la cara oclusal y la etapa de erupción de los segundos molares permanentes. Resultados: la prevalencia de caries fue de un 97% y la extensión (CPOD modificado) de 8,45± 5,10. El 82% de los adolescentes con experiencia de caries presentaba lesiones activas y el 62% de los carioactivos presentaban lesiones únicamente en las caras oclusales de los segundos molares permanentes. Se observó mayor prevalencia de lesiones de caries activas en los estadíos I y II de erupción de los segundos molares permanentes, siendo los sitios más afectados la fosa central y mesial y la fosa central y distal, respectivamente. Conclusiones: La erupción activa de molares significa una etapa de riesgo para las personas que debe ser considerada al momento priorizar y establecer programas de salud bucal.
Resumo Objetivo: descrever o comportamento, distribuição e severiidade das lesões de cárie nas superfícies oclusais dos segundos molares permanentes. Relacionar com seu estágio de erupção e presença de atividade no resto da cavidade oral. Metodologia: Foi realizado um estudo descritivo em uma amostra de conveniência de 100 adolescentes, de ambos os sexos, (média de idade = 13,39 ± 0,94 anos). Os pais responderam a um questionário sobre aspectos socioeconômicos e de saúde geral e os adolescentes sobre alimentação e hábitos de higiene. Dois examinadores calibrados realizaram o exame clínico de acordo com os critérios do ICDAS II em todas as superfícies erupcionadas, além de mapear a superfície oclusal e o estágio de erupção dos segundos molares permanentes. Resultados: a prevalência de cárie foi de 97% e a extensão (CPOD modificado) de 8,45 ± 5,10. 82% dos adolescentes com experiência de cárie tinham lesões ativas e 62% dos carioativos tinham lesões apenas nas superfícies oclusais dos segundos molares permanentes. Maior prevalência de lesões de cárie ativas foi observada nos estágios I e II de erupção dos segundos molares permanentes, sendo os locais mais acometidos a fossa central e mesial e a fossa central e distal, respectivamente. Conclusões: A erupção ativa de molares representa uma etapa de risco para as pessoas que deve ser considerada na priorização e estabelecimento de programas de saúde bucal.
Abstract Objective: to describe the behavior, distribution, and severity of lesions on the occlusal surfaces of the second permanent molars. Relate it to its stage of eruption and presence of activity in the rest of oral cavity. Methodology: A descriptive study was conducted in a convenience sample of 100 adolescents of both sexes (mean age = 13.39 ± 0.94 years). The parents answered a questionnaire on socioeconomic characteristics and general health, and the adolescents, one on food and hygiene habits. Two calibrated examiners recorder caries according to ICDAS II on all the dental surfaces . They also mapped the occlusal surface and eruption stage of the second permanent molars. Results: the prevalence of caries was 97%, and the extension (modified DMFT) was 8.45 ± 5.10. Eighty-two percent of the adolescents with caries experience had active lesions, and 62% of those with caries had lesions only on the occlusal surfaces of the second permanent molars. A higher prevalence of active caries lesions was observed in eruption stages I and II of the second permanent molars. The most affected sites were the central and mesial fossa and the central and distal fossa. Conclusions: Active molar eruption entails a risk stage that should be considered when prioritizing and developing oral health programs.
RESUMEN
Objective @#To research the root and root canal morphology of maxillary second permanent molars in the Guangfu population of the Lingnan area.@*Methods@#A total of 1220 maxillary second permanent molars were collected from the 723 CBCT images of the Guangfu population. The root and root canal configurations were observed and counted, and the morphological characteristics and changes were compared and analyzed.@*Results@# The maxillary second permanent molars included 709 three-root molars, 417 double root molars, 68 single root molars and 26 four-root molars. The difference in the detection rate of each root type in different sex and age groups was not statistically significant (P > 0.05). Root canal morphdogy of maxillary second permanent molars: type Ⅷ (3-3) was the most common type of root canals in single root molars, accounting for 63.25%. Significant differences in the detection rates of canal configurations were noted among the three subtypes of fused root canals in double root molars (P < 0.01). Root canal morphology of the mesiobuccal root of the three-root molars was mainly typeⅠ (1-1), significantly accounting for 78.84%. Significant sex and age differences were noted in the detection rate of type Ⅰ and Ⅳ root canals (P < 0.01). In addition, 75.86% of maxillary second permanent molars had symmetrical roots, and 73.64% of the bilateral teeth had symmetrical roots and canals.@*Conclusion@#The root and root canal morphology of maxillary second permanent molars in the Guangfu population in the Lingnan area are different compared with other areas at home and abroad.