NONCAST TITANIUM RESTORATIONS IN FIXED PROSTHODONTICS
NONCAST TITANIUM RESTORATIONS IN FIXED PROSTHODONTICS
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DOI：
10.1111/j.1365-2842.1992.tb01103.x
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发表时间：
1992-05-01
影响因子：
2.9
通讯作者：
REPPEL, PD
中科院分区：
文献类型：
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作者：
BOENING, KW;WALTER, MH;REPPEL, PD
铸造钛在牙科中遇到的问题尚未完全解决。Procera系统通过电火花腐蚀和铣削相结合的方式形成牙冠。在体外和体内两种情况下，在陶瓷贴面之前和之后检查适合的准确性。贴面之前，圆锥表面的空间宽度在体外约为53 μ m，在体内约为69 μ m。在肩部和咬合面，在体外测量的间隙约为430 μ m，在体内测量的间隙约为500 μ m。陶瓷贴面后，可以观察到间隙宽度略有增加。通过三点弯曲试验（DIN）和弯曲试验（ISO）测试金属-陶瓷复合物。DIN测试令人满意，但ISO测试不令人满意。结果表明，若考虑到肩、牙合面的间隙宽度及牙体预备的特殊要求，Procera系统加工的钛全冠是适合临床应用的。
The problems encountered in casting titanium in dentistry have not been completely resolved. The Procera system forms crowns by means of a combination of spark-erosion and milling. The accuracy of fit was examined before and after ceramic veneering both in vitro and in vivo. Before veneering, on conical surfaces space widths were approximately 53-mu-m in vitro and 69-mu-m in vivo. At shoulders and occlusal surfaces, spaces of about 430-mu-m were measured in vitro and of about 500-mu-m were measured in vivo. After ceramic veneering, slight increases in space widths could be observed. The metal-ceramic compound was tested by the 3-point bending test (DIN) and the bending test (ISO). The DIN test was satisfactory, but not the ISO test. It is concluded that titanium crowns processed by the Procera System are suitable for clinical usage, if the space widths at shoulders and the occlusal surface and the special requirements of tooth preparation are taken into account.