Avaliação ultramorfológica em microscopia eletrônica de transmissão e varredura da interface de união compósito-dentina produzida por diferentes cimentos resinosos convencionais e auto-adesivos

AUTOR(ES)

Carlos Eduardo Pena

DATA DE PUBLICAÇÃO

2009

RESUMO

The aim of this study was to evaluate the ultramorphology of the resindentin interfaces produced by different self-adhesive cements submitted to a nanoleakage protocol by means of Transmission (TEM) and Scanning Electron Microscopy (SEM), and to compare them with conventional resin cements. Materials and Methods: Six self-adhesive cements were used in the present study: RelyX Unicem (UN), RelyX U100 (UC), SmartCem 2 (SC), G-Cem (GC), Maxcem (MC), Set (SET); and two conventional resin cements: one that uses a 2-step etch-and-rinse adhesive (Rely X ARC - RX), and one that uses a 1-step self-etching adhesive (Panavia F - PF). An additional group included the use of a 2-step self-etching adhesive system (Clearfil SE Bond) prior to the application of Panavia F (PS). Thirtysix human molars were assigned to 9 groups according to the luting material. After 24h of water-storage, restored teeth were serially sectioned into 0.9 mm-thick slabs, which were submitted to a nanoleakage protocol with AgNO3 and observed in the TEM or SEM. Results: Different nanoleakage patterns were observed for the different groups. UC and UN self-adhesive resin cements presented little or no silver deposition, comparable to the conventional resin cements, while MC, SC and SET did not resist specimen preparation procedures. GC presented remarkable silver deposition along the interface. The additional group PS did not present differences from the original group PF. Conclusions: The characteristics of the resin-dentin interfaces were rather product-dependent than related to the type of resin cement.

ASSUNTO(S)

nanoinfiltração microscopia eletrônica de varredura cimentos resinosos microscopia eletrônica de transmissão resin cements sem nanoleakage tem cimentos auto-adesivos odontologia self-adhesive cements

Documentos Relacionados

• Resistência de união de cimentos resinosos auto-adesivos à dentina
• Comparação da resistência de união e padrão de fratura de cimentos resinosos convencionais e auto-adesivos.
• Análise da resistência de união, nanoinfiltração e características ultramorfológicas das interfaces de união resina-dentina produzidas por cimentos auto-adesivos ao longo do tempo.
• Influência do ácido poliacrílico na interface e resistência de união de cimentos resinosos autoadesivos à dentina
• Efeito do ultrassom na resistência de união de cimentos resinosos autoadesivos à dentina