Avaliação da eficácia do envolvimento do parafuso de fixação com politetrafluoretileno em conter a microinfiltração na interface implante/pilar após as etapas protéticas
Davidson Rodrigues Vidal.
Dissertação
por
D762
Campinas : [s.n.], 2012.
61 f. : il.
Dissertação (Mestrado em Implantodontia) - Centro de Pesquisas Odontológicas São Leopoldo Mandic.
O objetivo deste estudo foi avaliar quantitativamente a microinfiltração na interface implante/pilar utilizando o politetrafluoretileno (PTFE) envolvendo os parafusos de fixação, após torque e contra-torque para confecção de prótese sobre implante parafusada. Para a análise comparativa de selamento...
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O objetivo deste estudo foi avaliar quantitativamente a microinfiltração na interface implante/pilar utilizando o politetrafluoretileno (PTFE) envolvendo os parafusos de fixação, após torque e contra-torque para confecção de prótese sobre implante parafusada. Para a análise comparativa de selamento in vitro, foram utilizados 40 implantes (Titaniumfix São José dos Campos - SP), sendo estes, 20 implantes de hexágono externo (HE), plataforma regular 3.75 X 13mm e 20 implantes de hexágono interno (HI) plataforma regular 3.75 X 13 mm. Cada tipo de implante foi dividido em dois grupos utilizando ou não o PTFE ao redor do parafuso de fixação do componente protético, posteriormente a simulação das etapas protéticas que contemplam aparafusamento e desaparafusamento, sendo feitas 3 vezes torque e contra-torque com chave hexagonal 1,2. Todos os implante receberam em sua cavidade interna 4mm de cone de papel absorvente, e um componente protético com base pré-fundida (Ucla CrCo com hexágono - Titaniumfix, HI e HE), dado o torque com torquímetro manual (Titaniumfix) de acordo com o fabricante, para HE (32 N) e HI (32N). Após a inserção do PTFE dentro componente protético (Ucla)foi aplicado uma camada de 1mm de resina composta (Z350 - 3M ESPE) e fotopolimerizada de acordo com fabricante. Após o término do preparo, os corpos de prova foram imersos em 300 ml de solução tamponada de Azul de Metileno a 0,5% por 24 horas. As amostras foram submetidas à análise quantitativa do corante infiltrado na câmara interna dos implantes, através de leitura espectrofotométrica (Beckdman DU-65). Os Resultados foram submetidos a análises não paramétricas, sendo utilizados os testes de Kruskal Wallis onde constatou-se diferença significativa entre grupo (H = 18,77;p < 0,0001) e de Dunn, ao nível de significância de 5%. Os resultados revelaram que após o torque e contra-torque, os implantes do tipo HI cujos parafusos protéticos foram vedados com PTFE apresentaram a menor concentração do corante azul de metileno nos cones de papel absorventes. Para os implantes HE não se observou diferença significativa na concentração de corante resgastado, independentemente da aplicação ou não do PTFE. Concluiu-se que o envolvimento dos parafusos de fixação com PTFE associados aos implantes do tipo hexágono interno obteve melhores resultados em conter a microinfiltração na interface pilar/implantes.
Palavras-chave: Microinfiltração. Conexão pilar-implante. PTFE.
The aim of this study was to quantitatively evaluate the microleakage implant / abutment interface using polytetrafluoroethylene (PTFE) involving the fixing screws after torque and counter torque for making prosthetic implant screwed on. For comparative analysis of sealing in vitro, were used 40 implants (Titaniumfix São José dos Campos - SP), and these, 20 external hex implants (HE), 3.75 X 13mm regular platform implants and 20 internal hexagon (HI) platform Regular 3.75 X 13 mm. Each type of implant was divided into two groups with or without using PTFE around the fastening screw of the prosthetic component, subsequently simulating the prosthetic steps that include screwing and unscrewing, being made three times torque and counter torque with hexagonal wrench 1, 2nd. All implants were in its internal cavity 4mm absorbent paper cone, and a prosthetic component based pre-melted (UCLA hexagonal CrCo - Titaniumfix, HI and HE) due to the manual torque wrench (Titaniumfix) according to the manufacturer for HE (32 N) and HI (32N). After insertion into the PTFE prosthetic component (UCLA) was applied a layer 1mm composite resin (Z350 - 3M ESPE) and light cured according to the manufacturer. Upon completion of the preparation, the specimens were immersed in 300 ml of buffered methylene blue 0.5% for 24 hours. The samples were subjected to quantitative analysis of the dye infiltrated into the inner chamber of the implants through spectrophotometric (Beckdman DU-65). The results were analyzed by nonparametric being used Kruskal Wallis tests where it was found a significant difference between groups (H = 18.77, p <0.0001) and Dunn, at a significance level of 5%. The results revealed that after the torque and counter torque, the implants of the type whose HI prosthetic screws were sealed with PTFE showed the lowest concentration of methylene blue dye in absorbent paper cones. For implants HE did not observe a significant difference in dye concentration resgastado, regardless of whether or not the PTFE. It was concluded that the involvement of screws with PTFE associated with internal hexagonal implants achieved better results in containing the microleakage at the interface abutment / implant.
Keywords: Microleakage. Implant-abutment connection. PTFE.
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Palavras-chave: Microinfiltração. Conexão pilar-implante. PTFE.
The aim of this study was to quantitatively evaluate the microleakage implant / abutment interface using polytetrafluoroethylene (PTFE) involving the fixing screws after torque and counter torque for making prosthetic implant screwed on. For comparative analysis of sealing in vitro, were used 40 implants (Titaniumfix São José dos Campos - SP), and these, 20 external hex implants (HE), 3.75 X 13mm regular platform implants and 20 internal hexagon (HI) platform Regular 3.75 X 13 mm. Each type of implant was divided into two groups with or without using PTFE around the fastening screw of the prosthetic component, subsequently simulating the prosthetic steps that include screwing and unscrewing, being made three times torque and counter torque with hexagonal wrench 1, 2nd. All implants were in its internal cavity 4mm absorbent paper cone, and a prosthetic component based pre-melted (UCLA hexagonal CrCo - Titaniumfix, HI and HE) due to the manual torque wrench (Titaniumfix) according to the manufacturer for HE (32 N) and HI (32N). After insertion into the PTFE prosthetic component (UCLA) was applied a layer 1mm composite resin (Z350 - 3M ESPE) and light cured according to the manufacturer. Upon completion of the preparation, the specimens were immersed in 300 ml of buffered methylene blue 0.5% for 24 hours. The samples were subjected to quantitative analysis of the dye infiltrated into the inner chamber of the implants through spectrophotometric (Beckdman DU-65). The results were analyzed by nonparametric being used Kruskal Wallis tests where it was found a significant difference between groups (H = 18.77, p <0.0001) and Dunn, at a significance level of 5%. The results revealed that after the torque and counter torque, the implants of the type whose HI prosthetic screws were sealed with PTFE showed the lowest concentration of methylene blue dye in absorbent paper cones. For implants HE did not observe a significant difference in dye concentration resgastado, regardless of whether or not the PTFE. It was concluded that the involvement of screws with PTFE associated with internal hexagonal implants achieved better results in containing the microleakage at the interface abutment / implant.
Keywords: Microleakage. Implant-abutment connection. PTFE.
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Avaliação da eficácia do envolvimento do parafuso de fixação com politetrafluoretileno em conter a microinfiltração na interface implante/pilar após as etapas protéticas
Davidson Rodrigues Vidal.
Avaliação da eficácia do envolvimento do parafuso de fixação com politetrafluoretileno em conter a microinfiltração na interface implante/pilar após as etapas protéticas
Davidson Rodrigues Vidal.
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