ABSTRACT The aim of this study was to determine the caries situation of three-year-old preschool children residing in low socioeconomic status districts in Lima, Peru. The study is a crosssectional analysis of the caries situation of suburban areas of Lima. A stratified sampling procedure by geographical distribution, considering healthcare centers with a motherand- child health clinic and surrounding preschools as factors, identified 45 randomly selected preschools, of which 17 accepted to participate. Children from 3-year-old classrooms were examined by two independent calibrated dentists using the Caries Assessment Spectrum and Treatment (CAST) instrument at their premises using artificial light, sterile examination mirrors and gauze for drying each tooth before evaluation. ANOVA and the Tamhane method were used to analyze the data. 308 children, mean age 3.4 years (min: 3 years; max: 3 years, 7 months), were examined. The sample prevalence of enamel and dentine carious lesions (CAST code 3-7) was 91.2% while the prevalence of dentine carious lesions (CAST code 4-7) was 58.8%. The mean number of teeth with cavities that had reached the pulp and those that had an abscess or fistula were 2.0% and 0.5% respectively. The majority of enamel and dentine carious lesions were observed in molars. The CAST severity score was 7.0. Mean examination time was 57 seconds. The burden of dental caries of the children at this young age was high.

RESUMEN El objetivo del presente estudio fue determinar la prevalencia de caries dental en niños en edad preescolar de 3 años residentes en áreas suburbanas de Lima, Perú. Se trata de un análisis transversal de la situación de caries de áreas periféricas de Lima. Un procedimiento de muestreo estratificado por distribución geográfica consideraba a los centros de salud materno-infantiles y centros educativos preescolares de la jurisdicción como factores, identificando 45 centros prescolares aleatoriamente, de los cuales 17 aceptaron la invitación para participar del presente estudio. Dos odontólogas independientes, calibradas examinaron a los niños de las aulas de 3 años utilizando el instrumento Caries Assessment Spectrum and Treatment (CAST) en las instalaciones de cada jardín de infancia, utilizando luz artificial, instrumental estéril y gasas para el secado de las superficies a evaluar. Los datos fueron analizados utilizando ANOVA y el método Tamhane. Se evaluaron 308 niños, quienes tenían una edad media de 3.4 años (min: 3 años; max: 3 años, 7 meses). La prevalencia de lesiones de caries de esmalte y dentina (código CAST 3-7) fue del 91,2%, mientras que la prevalencia de lesiones de caries en dentina (código CAST 4-7) fue de 58,8%. El número promedio de dientes afectados por caries dental con compromiso pulpar y que tenían un absceso o fístula fue de 2.0% y 0.5% respectivamente. La mayoría de las lesiones de caries en esmalte y dentina se observaron en los molares. La valoración de severidad CAST fue 7.0. El tiempo promedio de examinación fue de 57 segundos. La carga de la enfermedad caries dental a estas edades tan tempranas ya es alta en la infancia suburbana de Lima.

Resumo O objetivo do presente estudo foi investigar a taxa de sucesso e de sobrevivência de dentes restaurados e tratados endodonticamente (DTE) em uma clínica privada e relacionar com índices periodontais. Dados de 360 restaurações realizadas em DTE realizadas entre 2000 e 2011 foram coletados. As datas das intervenções, como restaurações, reparos, substituições e extrações foram registradas. Ainda, informações gerais relacionadas aos pacientes, aos dentes envolvidos e ao estado periodontal foram também coletadas. A taxa de sucesso foi analisada utilizando o método estatístico Kaplan-Meier e uma análise multivariada do tipo regressão de Cox foi realizada para avaliar variáveis que influenciaram na taxa de sucesso e de sobrevivência. Depois de um período de observação médio de 4,34 anos (0,6-11,6 anos), 19 dentes foram extraídos e 27 restaurações precisaram de reparo ou substituição. De acordo com a regressão de Cox, o aumento na profundidade de bolsa periodontal do dente resulta em um maior risco de falha (p=0,012). Em conclusão, a profundidade de bolsa periodontal foi considerada como um fator significativo na sobrevivência de dentes restaurados e tratados endodonticamente.

Abstract The aim of the present study was to investigate the success and survival of restored endodontically treated teeth (ETT) in a general practice environment related to periodontal parameters. Data from 360 restored ETT treated between 2000 and 2011 were collected. Dates of interventions like restorations, repairs, replacements and extractions were recorded. Additionally, general information about patients and dentitions as well as periodontal status was recorded. Success was analyzed using Kaplan-Meier statistics and a multivariate Cox regression analysis was performed to assess variables influencing success and survival. After a mean observation time of 4.34 years (range 0.6 - 11.6 years), 19 teeth were extracted and 27 restorations needed repair or replacement. According to the Cox regression, increasing maximum pocket depth of the tooth resulted in a higher risk for failure (p=0.012). In conclusion, periodontal pocket depth was found to be a significant factor in the survival of restored ETT.