张建英,赵和平,杨磊,赵晓华,赵康

［摘要］目的：研究种植后应用CEREC III全瓷单冠修复的抗折性能。方法：分对照组与实验组(n=16)，实验组用CEREC III全瓷单冠修复ITI 043.651s+048.606；对照组用随机拔除无龋坏上颌第三磨牙，然后在万能试验机上测试每组牙的抗折裂性能，并记录最大载荷，比较各实验组与对照组的抗折强度的差别。结果：实验组(2.56±0.22)抗折强度接近于对照组(2.49±0.15) (P＞0.01)。结论：CEREC III全瓷单冠强度上可以作为种植后单冠常规的修复手段。

［关键词］种植修复；CEREC；全瓷单冠

[中图分类号]R783 [文献标识码]A [文章编号]1008-6455（2012）04-0650-02

Anti- fracture strength of ceramic crown repaired with CEREC III to implant

ZHANG Jian-ying,ZHAO He-ping,YANG Lei,ZHAO Xiao-hua,ZHAO Kang

(Department of Stomatology,The 264th hospital of PLA,Taiyuan 030001,Shanxi,China)

Abstract:ObjectiveTo study the anti- fracture strength of CEREC III ceramic crown to repair implant.MethodsExtracted teeth were used as control group (n=16).Experimental group (n=16) were CEREC III ceramic crown used to repair implant(ITI 043.651s+048.606).Control guoup and Experimental group were assayed on a universal testing device with its maximal loading recorded. The anti- fracturestrength was compared between the 2 groups.ResultsThe anti- fracture strength between the 2 groups was closely (2.56±0.22vs 2.49±0. 15,P＞0.01).Conclusion CEREC III ceramic crown can be used as routine restoration after implant.

Key words:implant;CEREC;ceramic crown;

口腔种植经过近30年的发展，已成为一项独立、成熟的新技术。目前临床上越来越多的牙齿缺失及牙列缺损、缺失病例首选种植修复。同时种植后即刻修复、即刻负载在临床上也在较多的开展[1]。椅旁快速美学瓷修复系统（chairside economical restorations esthetic ceramics,CEREC）作为目前世界上优秀的椅旁牙科修复计算机辅助设计和辅助制作 （computer aided design and computer aided manufacture,CAD/CAM）系统,已被临床证明是当今牙科修复的好助手，在临床工作中日渐显出其优势[2]。临床上种植后应用CEREC III全瓷单冠修复，可以较好的利用两者的优点。笔者尝试在种植体上行CEREC III全瓷单冠修复进行抗折裂实验，与对照牙比较抗折裂性能，以期为临床应用提供相关依据。

1材料和方法

1.1 实验材料和仪器：CEREC III型机（西门子公司，德国），Cerec MK II型瓷块（Vita公司，德国），帕那碧亚全瓷粘结剂，种植体为Straumann 直径4.8WN种植体代型配048.606基台，测试仪器为万能试验机。实验组应用CEREC III离体修复Straumann直径4.8WN种植体代型配048.606基台。随机取我科20～30岁门诊患者拔除的完整上颌第三磨牙16枚，要求肉眼及5倍放大镜下观察患牙牙体完整、均无缺损、无龋坏，作为对照组(n=16)所有样本均浸入室温下生理盐水内2～4周内备用。……