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KMID : 0362120160380030175
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Journal of Technologic Dentistry
2016 Volume.38 No. 3 p.175 ~ p.183
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Analysis of the bonding strength according to surface treatments of dental Co-Cr alloy for porcelain fused to metal
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Park Hee-Geun
Park Won-Uk
Zhao Jin-Ming
Hwang Kyu-Hong
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Abstract
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Purpose: Observation of Oxide Film Formation and Bonding Strength according to surface treatment of Co-Cr Alloy for porcelain fused to Metal.
Methods: metal specimens 0.5㎜×25㎜×4㎜ in size were made using Co-Cr alloys for porcelain fused to metal crown (Heraenium P, Tae jung Medis). Dental porcelain 0.5㎜×25㎜×4㎜ in size was sintered on the metal specimens after changing the etching time, sandblasting condition, and heat treatment temperature. Subsequently, the bonding strength was compared by the three-point flexural strength test using a universal testing machine (UTM) to observe the fracture surface and oxidized layers.
Results: With regard to the experimental group treated with acid-etching, Specimen 1 treated for 25 minutes (B- 3) showed the highest bonding strength, and Specimen 2 treated only with sandblasting showed the most excellent bonding force at 3.5 bar (C-3). With regard to the experimental group treated with sandblasting at 3.5 bar after acid-etching for 25 minutes, Specimen 3 with heat treatment at 980℃ (D-3) showed the highest bonding strength.
Conclusion: The specimen which went through both sandblasting and etching, showed an excellent ceramicmetal bond strength.
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KEYWORD
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Co-Cr Alloy, surface treatment, bond strength, sandblasting, etching
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