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Doctoral Thesis
DOI
10.11606/T.25.2005.tde-20032006-110855
Document
Author
Full name
Rogério Emílio de Souza
Institute/School/College
Knowledge Area
Date of Defense
Published
Bauru, 2005
Supervisor
Committee
Bernardineli, Norberti (President)
Bramante, Clovis Monteiro
Cruz Filho, Antonio Miranda da
Duarte, Marco Antonio Hungaro
Machado, Maria Aparecida de Andrade Moreira
Title in Portuguese
Avaliação da eficácia dos métodos de instrumentação e de substâncias químicas nas paredes de canais radiculares - Estudo em microscopia eletrônica de varredura
Keywords in Portuguese
endodontia
microscopia eletrônica
Abstract in Portuguese
Comparou-se a eficiência da instrumentação rotatória e manual-mecânica variando a substância auxiliar nos terços médio e apical quanto à presença da smear layer. Foram utilizados 95 dentes divididos em 4 grupos: Instrumentação manual-mecânico, Instrumentação com o sistema ProTaper, sistema RaCe e sistema 'K POT. 3', sendo os grupos irrigados com clorexidina 0,12% e hipoclorito de sódio 1%, tendo 15 dentes como controle. Ao final os dentes foram clivados em seu longo eixo, metalizados e levados ao MEV. Os resultados mostraram que não houve diferença entre os terços analisados, independente das técnicas ou das soluções. Frente à solução de hipoclorito, no terço médio e análise global, o sistema 'K POT. 3' mostrou melhores resultados. No terço apical não houve diferença estatística. Não houve diferença estatística entre as técnicas no terço médio, apical e global, quando irrigados com a Clorexidina. A análise das técnicas de instrumentação, independente das soluções e dos terços, mostrou não haver diferença estatística. A clorexidina se mostrou superior ao hipoclorito no terço médio independente da técnica de instrumentação e no terço apical as duas soluções se equipararam
Abstract in English
This study compared the efficiency of rotary and manual-mechanical instrumentation with variations in the auxiliary chemical in the middle and apical thirds as to the presence of smear layer. The study was conducted on 95 human teeth. As a control 15 teeth were divided into 3 groups. The other teeth were according to the study conditions: manual-mechanical instrumentation; rotary instrumentation with the ProTaper; RaCe and the 'X POT. 3' Each of these groups was employed: 0.12% chlorhexidine gluconate and 1% sodium hypochlorite. Each tooth was analyzed by MEV. Analysis of the results revealed no difference between the middle and apical thirds, regardless of the techniques or solutions. When the sodium hypochlorite solution was used, concerning the middle third the 'X POT. 3' exhibited better results. The apical third and global performance did not present statistical difference. With regard to the chlorhexidine, global analysis of the middle and apical third did not reveal statistical difference. Assessment of the instrumentation techniques, regardless of the irrigants and thirds, as to the presence of smear layer, did not exhibit statistical difference. Chlorhexidine was statistically better than sodium hypochlorite at the middle third, whereas at the apical third both solutions were statistically similar
 
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Publishing Date
2006-04-06
 
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