The effect of enamel etching on the in vivo marginal adaptation of indirect composite resin restorations luted with a self-adhesive material / Efeito do condicionamento acido do esmalte na adptação marginal in vivo de restaurações indiretas em resina composta cimentadas com material autoadesivo
AUTOR(ES)
Cristiana Godoy Sartori Azevedo
DATA DE PUBLICAÇÃO
2009
RESUMO
In vitro studies have suggested enamel-etching before luting indirect restorations with the self-adhesive cement RelyX Unicem. However, there is no scientific proof that this procedure has any clinical relevance. The aim of this in vivo study was to evaluate the effect of enamel etching on the marginal quality of indirect composite resin restorations (inlay/onlay) using the self-adhesive cement RelyX U100. Forty-two posterior teeth were selected from 25 patients that presented one or two teeth with large restorations in need of replacement. The teeth were prepared for indirect restorations (inlay/onlay). Next, the teeth were molded with polyvinylsiloxane and protected with interim restorations. The composite resin restorations were built over plaster casts using the incremental technique. Using a LED device, increments were light-cured for 40s for dentin opacity shades and 20s for all other shades. After one week, patients returned so that indirect restorations could be cemented. Teeth were isolated with rubber dams and the restorations were luted according to one of the following protocols: Etched group - selective enamel-etching + self-adhesive cement; Non-etched group - selfadhesive cement alone. The restorations were kept under finger-pressure for 2 minutes while removing excess cement. Each face was then light-cured for 60s. Recalls occurred after 1 week (baseline) and 12 months when the teeth were photographed, molded and evaluated according to previously established scores (USPHS criteria). Epoxy resin replicas were examined by SEM at X18 to X200. The results were expressed as percentage of the total observable marginal length for each parameter. No statistical difference was found between groups with an exception for the restoration margin fracture quality (MEV analysis) for the nonetched group. Time degraded somewhat the restorations margins with underfilling being the more frequent find. We concluded that enamel-etching had no clinical relevance on marginal quality for indirect composite resin restorations luted with RelyX U100 self-adhesive cement during 12 months. Moreover, the presence of small marginal defects did not interfere in the clinical longevity of the restorations that reached at least 93,75% of the Alpha criteria after 12 months
ASSUNTO(S)
dental materials adesão microscopia eletronica adhesion cementation materiais dentarios electron microscopy cimentação
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=000450145Documentos Relacionados
- 1-Year clinical study of indirect resin composite restorations luted with a self-adhesive resin cement: effect of enamel etching
- Tensile bond strength of indirect composites luted with three new self-adhesive resin cements to dentin
- Luting glass ceramic restorations using a self-adhesive resin cement under different dentin conditions
- Effect of Enamel and Dentin Surface Treatment on the Self-Adhesive Resin Cement Bond Strength
- Effect of surface treatment and storage on bond strenght between indirect composite and self-adhesive cement