The effect of different metal surface grindings in the metal-ceramic bond strength

Bagis, Bora; Oztas, D. Derya
January 2009
Internet Journal of Dental Science;2009, Vol. 6 Issue 2, p15
Academic Journal
Purpose: This study aims to compare the bond strength of Ni-Cr alloys to ceramic after different types of grindings. Materials and Methods: 20 specimens made of Ni-Cr alloys were divided into two groups. The first group of specimens was grinded with a carbide bur (EL5, SS White Burs Inc, Lakewood, NJ, USA) in one direction and the second group of the specimens was grinded in multiple directions. After sandblasting and steam cleaning, 2 mm ceramic (Ceramico II, Ceramco Inc, Burlington, NJ-USA) was fused to Ni-Cr alloy. A tensile bond strength test was used and the data was analyzed by one-way statistically analysis of variance (ANOVA) and Student's t-test. Surface characterizations of Ni-Cr alloys are also examined on scanning-electron microscopy (SEM) after debonding. Results: Grinding alloys in multiple directions prior to the application of the ceramic, demonstrates significantly higher bond strength with ceramic than grinding in one direction (p<0.05). Conclusion: Within the limitation of this study, metal grinding in multiple directions with light hand pressure maybe an advantage in increasing metal-ceramic bond strength.


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