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

›› 2018, Vol. 38 ›› Issue (10): 890-893.

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

李学盛¹,李鸿波²

1. 海南口腔医院
2. 解放军总医院

收稿日期:2018-04-10 修回日期:2018-05-15 出版日期:2018-10-28 发布日期:2018-10-30
通讯作者: 李鸿波 E-mail:hongbolii@sina.com
基金资助:
北京市科技计划;中国人民解放军总医院临床科研扶持基金

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

Received:2018-04-10 Revised:2018-05-15 Online:2018-10-28 Published:2018-10-30

摘要/Abstract

摘要： 目的：研究内冠厚度对钴铬合金烤瓷髓腔固位冠金瓷结合强度的影响。方法：选取32 颗离体磨牙，随机分为4 组，分别铸造0.3mm、0.5mm、0.8mm、 1.0mm 厚度内冠的钴铬合金烤瓷髓腔固位冠，采用万能检测机测试烤瓷冠的金瓷结合强度，扫描电镜和能谱仪分析金瓷结合界面。结果：0.3mm、0.5mm、0.8mm、 1.0mm 厚度内冠的剪切力强度值分别为11.34±1.70MPa、11.55±1.62MPa、13.42 ±1.41MPa 和15.21±2.85MPa，不同厚度内冠之间的剪切力强度有统计学差异 (P<0.05)。结论：钴铬合金烤瓷髓腔固位冠不同厚度内冠的金瓷结合强度均能满足临床要求，临床上可根据具体情况灵活选用。但如果从修复间隙的角度考虑，在咬合间距过紧、严重磨耗等牙体修复时，可考虑使用较薄的内冠厚度。

关键词: 钴铬合金, 髓腔固位冠, 金瓷结合强度, 金属烤瓷合金

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

中图分类号:

R783.3

李学盛李鸿波. 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[J]. , 2018, 38(10): 890-893.

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