Comparison of the bond strength of ceramics to Co-Cr alloys made by casting and selective laser melting.
- Author:
Shirin LAWAF
1
;
Shahbaz NASERMOSTOFI
;
Mahtasadat AFRADEH
;
Arash AZIZI
Author Information
- Publication Type:Original Article
- Keywords: Bond strength; Co-Cr alloy; Selective laser melting; Metal-ceramic restorations
- MeSH: Alloys*; Ceramics*; Dental Porcelain; Freezing*; Methods
- From:The Journal of Advanced Prosthodontics 2017;9(1):52-56
- CountryRepublic of Korea
- Language:English
- Abstract: PURPOSE: Considering the importance of metal-ceramic bond, the present study aimed to compare the bond strength of ceramics to cobalt-chrome (Co-Cr) alloys made by casting and selective laser melting (SLM). MATERIALS AND METHODS: In this in-vitro experimental study, two sample groups were prepared, with one group comprising of 10 Co-Cr metal frameworks fabricated by SLM method and the other of 10 Co-Cr metal frameworks fabricated by lost wax cast method with the dimensions of 0.5 × 3 × 25 mm (following ISO standard 9693). Porcelain with the thickness of 1.1 mm was applied on a 3 × 8-mm central rectangular area of each sample. Afterwards, bond strengths of the samples were assessed with a Universal Testing Machine. Statistical analysis was performed with Kolmogorov-Smirnov test and T-test. RESULTS: Bond strength in the conventionally cast group equaled 74.94 ± 16.06 MPa, while in SLM group, it equaled 69.02 ± 5.77 MPa. The difference was not statistically significant (P ≤ .05). CONCLUSION: The results indicated that the bond strengths between ceramic and Co-Cr alloys made by casting and SLM methods were not statistically different.
