不同厚度内冠对钴铬合金烤瓷髓腔固位冠金瓷结合强度的影响

Abstract

Abstract: Objective: To investigate the influence of inner crown thickness on the bonding strength of porcelain fused to Co-Cr alloy endocrown by shear strength test method. Methods:32 molar teeth were randomly divided into 4 groups. Co-Cr alloy endocrowns with a thickness of inner crown of 0.3mm, 0.5mm, 0.8mm and 1.0mm were cast respectively, the bonding strength of porcelain-metal was measured by universal testing machine, and the bonding interface was analyzed by scanning electron microscope and energy dispersive spectrometer. Result: The bonding strength of difference thickness of inner crown were 11.34±1.70MPa, 11.55±1.62MPa, 13.42±1.41MPa and 15.21±2.85MPa respectively, analysis of variance showed there was statistically significant difference(P<0.05). Conclusion: The bonding strength of porcelain fused to Co-Cr alloy endocrown varied according to the different thickness of inner crown and the thicker inner crown was recommended to tooth defect with insufficient prosthodontics space.

Key words: Co-Cr alloy, endocrown, bond strength, porcelain alloy

CLC Number:

R783.3

References

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Influence of inner crown thickness on the bonding strength of porcelain fused to Co-Cr alloy endocrown

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