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Avaliação da prevalência e posição de terceiros molares impactados de acordo com as classificações de Pell e Gregory e de Winter numa clínica universitária portuguesa
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OBJETIVO: Determinar a prevalência e posição de terceiros molares impactados de acordo com as classificações de Winter e de Pell e Gregory, numa clínica universitária portuguesa.
MATERIAIS E MÉTODOS: Foram analisadas as ortopantomografias realizadas pelos pacientes da FMDUL entre novembro de 2019 e maio de 2023. Os dados foram recolhidos por apenas um observador que apresentou uma taxa de concordância de 92,5%. Das ortopantomografias que respeitavam os critérios de inclusão e exclusão foram recolhidos diversos dados, entre os quais, a classificação de Winter e de Pell e Gregory. Foi considerado um nível de significância estatística de 5% (p < 0,05).
RESULTADOS E DISCUSSÃO: Foram analisadas 941 ortopantomografias. Destas, 23,7% apresentavam pelo menos um dente impactado e, em média, os pacientes apresentavam 2,2 dentes impactados. A prevalência de terceiros molares impactados foi de 12,4% e a presença de apenas um terceiro molar impactado foi o caso mais frequente (35%). O dente mais frequentemente impactado foi o dente 48 com 27,1%. A posição mais frequente nos terceiros molares superiores impactados, segundo a classificação de Winter, foi a posição distoangulada (48,6%) seguida pela posição vertical (29,3%), este resultado é corroborado pela literatura. Nos terceiros molares inferiores impactados, segundo a classificação de Winter, a posição mais frequente também foi a posição distoangulada (33,2%), este resultado diverge da literatura. Por fim, nos terceiros molares inferiores impactados, segundo a classificação de Pell e Gregory, a posição mais frequentemente encontrada foi a posição IIB (48%) seguida pela posição IIA (38,1%), resultado este que é corroborado pela literatura existente.
CONCLUSÃO: Na população estudada, a prevalência de terceiros molares impactados foi de 12,4%. Segundo a classificação de Winter, a posição distoangulada foi a mais frequente, com 48,6% e 33,2%, no maxilar superior e inferior, respetivamente. Segundo a classificação de Pell e Gregory, 48% dos terceiros molares inferiores enquadram-se na posição IIB.
OBJECTIVE: To determine the prevalence and position of impacted third molars according to Winter's and Pell and Gregory's classifications in a Portuguese university clinic. MATERIALS AND METHODS: Orthopantomographies performed by FMDUL patients between November 2019 and May 2023 were analyzed. Data were collected by only one observer, who showed a 92.5% agreement rate. From the orthopantomographies that met the inclusion and exclusion criteria, several data were collected, including Winter's classification and Pell and Gregory's classification. A 5% statistical significance level (p < 0.05) was considered. RESULTS AND DISCUSSION: A total of 941 orthopantomographs were analyzed. Of these, 23.7% had at least one impacted tooth and, on average, patients had 2.2 impacted teeth. The prevalence of impacted third molars was 12.4% and the presence of only one impacted third molar was the most frequent case (35%). The most frequently impacted tooth was tooth 48 with 27.1%. The most frequent position in impacted upper third molars, according to Winter's classification, was the distoangulated position (48.6%) followed by the vertical position (29.3%), this result is consistent with the literature. In the impacted mandibular third molars, according to Winter's classification, the most frequent position was also the distoangulated position (33.2%), this result differs from the literature. Finally, in impacted mandibular third molars, according to Pell and Gregory's classification, the most frequently found position was IIB (48%) followed by IIA (38.1%), this result is consistent with the literature. CONCLUSION: In the analyzed population, the prevalence of impacted third molars was 12.4%. According to Winter's classification, the distoangulated position was the most frequent, with 48.6% and 33.2% in the upper and lower jaws, respectively. According to Pell and Gregory's classification, 48% of the mandibular third molars were in position IIB.
OBJECTIVE: To determine the prevalence and position of impacted third molars according to Winter's and Pell and Gregory's classifications in a Portuguese university clinic. MATERIALS AND METHODS: Orthopantomographies performed by FMDUL patients between November 2019 and May 2023 were analyzed. Data were collected by only one observer, who showed a 92.5% agreement rate. From the orthopantomographies that met the inclusion and exclusion criteria, several data were collected, including Winter's classification and Pell and Gregory's classification. A 5% statistical significance level (p < 0.05) was considered. RESULTS AND DISCUSSION: A total of 941 orthopantomographs were analyzed. Of these, 23.7% had at least one impacted tooth and, on average, patients had 2.2 impacted teeth. The prevalence of impacted third molars was 12.4% and the presence of only one impacted third molar was the most frequent case (35%). The most frequently impacted tooth was tooth 48 with 27.1%. The most frequent position in impacted upper third molars, according to Winter's classification, was the distoangulated position (48.6%) followed by the vertical position (29.3%), this result is consistent with the literature. In the impacted mandibular third molars, according to Winter's classification, the most frequent position was also the distoangulated position (33.2%), this result differs from the literature. Finally, in impacted mandibular third molars, according to Pell and Gregory's classification, the most frequently found position was IIB (48%) followed by IIA (38.1%), this result is consistent with the literature. CONCLUSION: In the analyzed population, the prevalence of impacted third molars was 12.4%. According to Winter's classification, the distoangulated position was the most frequent, with 48.6% and 33.2% in the upper and lower jaws, respectively. According to Pell and Gregory's classification, 48% of the mandibular third molars were in position IIB.
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Teses de mestrado - 2023 Saúde Oral