Eficácia de limpeza de técnicas de instrumentação manual e rotatória em canais radiculares ovais: estudo em microscopia eletrônica de varredura

Autores

  • Monique Dossena Acauan PUCRS
  • Amanda Donga PUCRS
  • Renata Dornelles Morgental PUCRS
  • Patricia Maria Poli Kopper UFRGS
  • Simone Bonato Luisi UFRGS
  • Fabiana Vieira Vier-Pelisser PUCRS

Palavras-chave:

Endodontia, preparo do canal radicular, camada de esfregaço, microscopia eletrônica de varredura,

Resumo

Objetivo: Avaliar a eficácia de limpeza do sistema rotatório Mtwo, da instrumentação manual e da associação de ambos em canais radiculares ovais. Metodologia: Trinta incisivos inferiores humanos foram divididos em três grupos (G): GMtwo – série básica (10.04; 15.05, 20.06, 25.06) e instrumentos 30.05, 35.04, 40.04 da série complementar; GMtwo + Manual – série básica do Mtwo seguida por instrumentos manuais 30 ao 40; GManual – técnica clássica com instrumentos manuais 15 ao 40. Os dentes foram seccionados longitudinalmente e as paredes vestibular e lingual dos canais radiculares foram visualizadas em microscopia eletrônica de varredura (MEV). Imagens centrais de cada terço do canal foram obtidas e classificadas em escores baseados na quantidade de smear layer (SL) e detritos orgânicos (DO). Os dados foram analisados pelos testes de Kruskal-Wallis e Friedman. Resultados: Não houve diferença significativa entre os grupos (P>0,05) quanto à SL. O terço cervical demonstrou escores significativamente menores do que os demais segmentos (P<0,05). Quanto aos DO, escores do GManual foram significativamente menores que no GMtwo + Manual (P<0,05). Não houve diferença significativa entre os terços (P>0,05). Conclusão: Nenhuma das técnicas foi completamente eficaz na limpeza de canais radiculares ovais. O terço apical foi a área com maior quantidade de SL.

Biografia do Autor

Renata Dornelles Morgental, PUCRS

Especialista em Endodontia pela ABORS (2005-2007). OBS: enviei o artigo do meu trabalho de conclusão do curso para ser avaliado para publicação

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Publicado

2013-08-21

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Artigo Original