Bond strength of resin cement to CO2 and Er:YAG laser-treated zirconia ceramic.
10.5395/rde.2014.39.4.296
- Author:
Shahin KASRAEI
1
;
Loghman REZAEI-SOUFI
;
Bijan HEIDARI
;
Fariborz VAFAEE
Author Information
1. Dental Research Center, Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran. loghmansofi@umsha.ac.ir
- Publication Type:Original Article
- Keywords:
CO2 laser;
Er:YAG laser;
Resin cement;
Zirconium oxide
- MeSH:
Adhesives;
Ceramics*;
Lasers, Gas;
Resin Cements*;
Water
- From:Restorative Dentistry & Endodontics
2014;39(4):296-302
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: It is difficult to achieve adhesion between resin cement and zirconia ceramics using routine surface preparation methods. The aim of this study was to evaluate the effects of CO2 and Er:YAG laser treatment on the bond strength of resin cement to zirconia ceramics. MATERIALS AND METHODS: In this in-vitro study 45 zirconia disks (6 mm in diameter and 2 mm in thickness) were assigned to 3 groups (n = 15). In control group (CNT) no laser treatment was used. In groups COL and EYL, CO2 and Er:YAG lasers were used for pretreatment of zirconia surface, respectively. Composite resin disks were cemented on zirconia disk using dual-curing resin cement. Shear bond strength tests were performed at a crosshead speed of 0.5 mm/min after 24 hr distilled water storage. Data were analyzed by one-way ANOVA and post hoc Tukey's HSD tests. RESULTS: The means and standard deviations of shear bond strength values in the EYL, COL and CNT groups were 8.65 +/- 1.75, 12.12 +/- 3.02, and 5.97 +/- 1.14 MPa, respectively. Data showed that application of CO2 and Er:YAG lasers resulted in a significant higher shear bond strength of resin cement to zirconia ceramics (p < 0.0001). The highest bond strength was recorded in the COL group (p < 0.0001). In the CNT group all the failures were adhesive. However, in the laser groups, 80% of the failures were of the adhesive type. CONCLUSIONS: Pretreatment of zirconia ceramic via CO2 and Er:YAG laser improves the bond strength of resin cement to zirconia ceramic, with higher bond strength values in the CO2 laser treated samples.
