AIM: To estimate tooth loss prevalence among adolescents in São Paulo, considering socioeconomic and demographic factors, dental service use and pain. METHODS: Data were obtained from the São Paulo Oral Health Survey 2008. The sample comprised 2858 adolescents from 15 to 19 years old from public and private schools, who underwent through an oral examination. In addition, a questionnaire was applied regarding the characterization of factors related to socioeconomics, demographics, use of dental services and pain in the last six months. At least one tooth lost was the outcome. The independent variables included gender, ethnicity, parents' schooling, type of school, number of rooms, people and cars per home, family income, dental service use, decayed teeth, toothache. A multivariate logistic regression model was used. RESULTS: The prevalence of tooth loss was 7%. The independent variables decayed tooth (RP=1.71), toothache (RP=2.04), father's schooling - elementary (RP=1.40) and per capita family income - less than 1/2 a minimum salary (RP=1.45) were associated with the outcome. CONCLUSIONS: The results suggest that socioeconomic factors may contribute to the increase of early tooth loss among adolescents.

JUSTIFICATIVA E OBJETIVOS: A exodontia de terceiros molares é um procedimento invasivo e potencialmente traumático. Procedimentos preparatórios podem ser usados para manuseio da dor e de respostas emocionais, resultando em uma melhor recuperação dos pacientes. O objetivo deste estudo foi avaliar os efeitos de um vídeo de animação informativo em respostas de dor após exodontia de terceiro molar em jovens. MÉTODOS: Neste estudo, 140 pacientes submetidos a exodontia de terceiro molar foram randomizados em dois grupos: controle (GC) e experimental (GE). Para avaliação da dor foi utilizado o Questionário de Dor McGill, forma reduzida. Essa avaliação foi realizada uma vez antes do procedimento cirúrgico e quatro vezes após. Foi também registrada a quantidade de analgésicos consumidos após exodontia. O vídeo informativo foi apresentado ao GE após a primeira avaliação. Foram utilizados os testes ANOVA e Tukey para análise de dados (p<0,05). RESULTADOS: A análise mostrou que o GE relatou diminuição de todos os índices de dor. Diferença significativa entre os grupos foi observada nos Índices de Estimativa de Dor Sensorial e Afetiva (PRI-S e PRI-A), como na Avaliação Global de Experiência de Dor nas fases 2, 3 e 4 (p=0,0001; p=0,0027; p=0,0001). Para a Intensidade de Dor Presente (PPI) foi observada diferença significativa entre os grupos (p=0,0004) nas fases 3, 4 e 5. O consumo pós-operatório de analgésico foi menor no GE (p=0,0001), indicando um maior consumo de medicamento para o GC. CONCLUSÃO: Os resultados sugerem que o vídeo de informação pré-operatório efetivamente reduziu a percepção de dor e o consumo de analgésicos.

BACKGROUND AND OBJECTIVES: The extraction of the third molar is an invasive procedure and is potentially traumatic for the patient. Preparatory procedures may be used for the management of pain and emotional responses, resulting in a better recovery process for patients. The aim of the study evaluates the effects of a preparatory procedure using an animated informative video on post-surgical pain responses after third molar extraction on youths during the postoperative follow-up. METHODS: 140 patients undergoing third molar extraction were randomly divided into two groups: control (CG) and experimental (EG). For pain assessment, the short-form McGill pain questionnaire was given once before the procedure and four times after the surgery, and the amount of postoperative analgesic consumption was recorded. The informative video was presented to the EG after the first assessment. For data analysis, ANOVA and Tukey tests (p < 0.05) were used. Data analysis indicated that the EG patients reported reduced pain perception for all pain indexes. RESULTS: Significant between-group differences were observed for Sensory and Affective Rank Pain Indexes (PRI-S and PRI-A, respectively), as well as for Global Assessment, at stages 2, 3 and 4 (p=0.0001; p=0.0027; p=0.0001). For Present Pain Intensity, a significant difference between groups was observed (p=0.0004) at stages 3, 4 and 5. The postoperative consumption of analgesics was lower in the EG (p=0.0001), indicating higher medicine consumption by CG patients. CONCLUSION: The results suggest that the preoperative informative video effectively reduced pain perception and the consumption of analgesics.

JUSTIFICATIVA E OBJETIVOS: A exodontia de terceiro molar é um procedimento invasivo potencialmente adverso ao paciente, podendo causar dor. O objetivo deste estudo foi avaliar a eficácia de informação face a face sobre a dor pós-operatória e consumo de analgésicos de pacientes submetidos à exodontia de terceiros molares. MÉTODO: Realizou-se um estudo longitudinal com 123 pacientes, distribuídos randomicamente nos grupos: Controle (GC) e Experimental (GE). Utilizou-se o Questionário McGill de Dor em sua forma reduzida (Índice de Estimativa de Dor Sensorial, Índice de Estimativa de Dor Afetiva, Intensidade de Dor Presente e Avaliação Global de Experiência de Dor), nos momentos: pré-cirúrgico, pós-cirúrgico imediato, pós-cirúrgico mediato I, pós-cirúrgico mediato II e remoção de sutura. A informação face a face foi oferecida aos pacientes do GE imediatamente após o momento pré-cirúrgico. Usou-se para análise estatística o teste Qui-quadrado, modelos mistos para medidas repetidas (Proc Mixed do programa SAS) e Tukey (α = 5%). RESULTADOS: Os dados sugerem uma diferença estatisticamente significativa entre os grupos no Índice de Estimativa de Dor Sensorial no Pós-Cirúrgico Imediato apontando que o relato de dor pós-operatória imediata foi menor no grupo que recebeu a informação face a face. CONCLUSÃO: A informação face a face reduziu a dor no pós-operatório. Estas estratégias são importantes para estabelecer respostas eficientes de enfrentamento e aumentar a adesão no pós-operatório.

BACKGROUND AND OBJECTIVES: Third molar extraction is an invasive and potentially adverse procedure and may induce pain. The objective of the study was to evaluate the efficacy of face to face information on postoperative pain and analgesic consumption in patients undergoing third molar extraction. METHOD: This was a longitudinal study with 123 patients randomly distributed in two groups: Control (CG) and Experimental (EG). McGill Pain Questionnaire- short form (Sensory Pain Rank Index, Affective Pain Rank Index, Present Pain Intensity and Patient Global Assessment of Pain Experience) was used in the following moments: preoperative period, immediate postoperative period, mediate postoperative period I, mediate postoperative period II and suture removal. Face-to-face information was given to EG patients immediately after the preoperative moment. Chi-square test was used for statistical analysis, mixed models were used for repeated measures (SAS program's Proc Mixed), in addition to Tukey test (α = 5%). RESULTS: The results suggest a statistically difference between groups in Sensory Pain Rank Index in the immediate postoperative period, showing that immediate postoperative pain report was lower in the group receiving face-to-face information. CONCLUSION: Face-to-face information has decreased postoperative pain. These strategies are critical to establish effective coping responses and to improve postoperative adherence.