EFFECT OF DIFFERENT SURFACE TREATMENTS ON THE BONDS STRENGTH OF A RESIN CEMENT IN ZIRCONIA FRAMEWORKS

Nicolás Pinto Pardo ； Priscilla Ledezma Araya ； Macarena Pinto Pardo

《Journal of International Dental and Medical Research》 9卷1期 (2016/04) Pp. 1-5

並列摘要

To compare the shear bond in zirconia blocks using different surface treatments with adhesive materials in different test environments. Sixty blocks of zirconia cut and sintered Cercon art 7x7x3 mm and thirty blocks 4x4x3 mm were separated in three groups: 1. no treatment (control), 2. alumina airbone-particle abrasion, 3. CoJet airbone-particle abrasion (silica coating with 30 μm silica-modified alumina particles). After surface treatment, blocks were bonded against acid-etched resin blocks + silane + RelyX U200. Templates were divided again in three groups and stored in three different environments: 1. dry stored, 2. In 37°C distilled water for ten days, 3. Thermocycled (10,000 cycles of 5°C and 55°C). All templates were subjeted to shear bond strength test with instron machine. The data was analyzed with Systat software for Windows for one-way ANOVA and two-way Scheffe test. Failure mode was observed and analyzed by optic microscope (OM). CoJet airborne-particle abrasion resulted in higher shear bond strength than those in other groups, while no significant difference existed between the specimens which were treated with alumina airbone-particle abrasion and CoJet airbone-particle abrasion, but the CoJet treatment was significantly higher than no treatment (p＜0.05). In all three environments CoJet airbone-particle abrasion treatment obtained higher values. No cohesive failures were observed by OM in any group. The combination of tribochemical silica coating (CoJet, 3M) with silane coupling can improve the bond of zirconia when self-adhesive resin cement is used and it is recommended as a pretreatment to increase zirconia retention.

並列關鍵字

Surface Treatment ； Zirconia ； Tribochemical Coating ； Bond Strength ； Cementation