Westermann W, Kerschbaum T, Hain H
Klinik und Poliklinik für Zahn-, Mund- und Kieferkrankheiten der Universität zu Köln.
Dtsch Zahnarztl Z. 1990 Nov;45(11):743-7.
Statistical methods of survival-analysis were applied to investigate the "life-time" of three types of class II amalgam restorations: 1355 F3-, 355 F4-amalgam filling, 108 TMS-pin-retained extensive amalgam restorations and 222 single crowns of a total of 630 patients of a private dental office. After 8 years of service about 50% of the extensive amalgam fillings, but 12% of the single crowns were still under risk.
应用生存分析的统计方法，对一家私人牙科诊所630名患者的三种II类汞合金修复体的“使用寿命”进行了调查：1355个F3型、355个F4型汞合金填充物，108个TMS桩核保留大面积汞合金修复体和222个单冠。经过8年的使用，约50%的大面积汞合金填充物仍有保留风险，但单冠的这一比例为12%。
