بررسي استحكام باند كامپوزيت به پرسلن به سه روش اسيداچ - سايلن اسيداچ و سندبلاست

Evalution of bond strength of composite to porcelain using different preparatory techniques

Aim: The bonding potential of porcelain laminate veneers to enamel is usually provided. This study was designed to assess the bond strength of these veneers using Asid etch,saline or sandblasting technique. Materials and Mothod: In this study, 30 disks of porcelain (2.4mm thickness and 9.5mm diameterer) were provided to measure the bond strength between laminate and resin. An initial preparation of one of the porcelain disk surfaces was carriedout using one of the following techniques: group 1 acid etch-silane, group 2 acid etch and group 3 sandblasting. A composite disk was then shaped and cured to each porcelain disk. Then maximum force needed was measured to break the bond between composite and porcelain. Results: Results showed that maximum bond was between composite and porcelain in acid etch-silane techniques while the least was in sandblasting technique. Analysis of variance showed no significant difference between group 1 and 2, with a significant difference between groups 1 and 3, 2 and 3. Conclusions: There seems to be an advantage of combined use of asid etch-saline use prior to the application of bond in procelain veneer restoration strength.