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KMID : 0362120110330040339
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Journal of Technologic Dentistry
2011 Volume.33 No. 4 p.339 ~ p.347
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The Influence of Surface Treatment and Opaque Application Methods on the Bond Strength of PFM Restorations
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Kim Sung-Min
Choi Sung-Min
Chung In-Sung
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Abstract
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Purpose: This study was investigated the bonding strength of two kinds of Ni-Cr alloy with respect to the condition of surface treatment. Methods: The surface treatment was performed on the two kinds of Ni-Cr alloy (B alloy and R alloy) specimens, which were sandblasted with , , and aluminium oxide and were treated with opaque application (paste and wash opaque). The roughness on the surfaces of the specimens was observed. The metal-ceramic interfaces were analyzed with EPMA in order to ionic diffusion, and the shear test was performed. Results: The BA250 specimen, which has higher surface roughness, showed the highest bonding strength in B specimens. In R specimens, the bonding strength of RA110 specimen was the highest. Conclusion: B specimen formed a mechanical bond between metal-ceramic interfaces; however, in the case of R specimen, a chemical bond was formed between that interfaces. There was no significant statistical difference between the bonding strengths of two types of specimens (p>0.05).
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KEYWORD
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surface treatment, opaque material, bond strength, interface analysis
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