Smales R J
University of Adelaide, Department of Dentistry, South Australia.
Oper Dent. 1991 Jan-Feb;16(1):17-20.
The longevity of 124 cusp-covered class 2 amalgam restorations and 644 restorations placed without cusp coverage was assessed over periods of up to 15 years. The survivals of both groups of restorations were approximately 72% after 15 years. The longevity of the cusp-covered restorations was not affected significantly by the use of pins for retention, or by patient age. The survivals were much better than the estimates of longevity generally ascribed by dentists to cusp-covered or complex amalgam restorations.
对124个覆盖牙尖的二类银汞合金修复体和644个未覆盖牙尖的修复体进行了长达15年的寿命评估。两组修复体在15年后的留存率均约为72%。覆盖牙尖修复体的寿命不受固位钉使用或患者年龄的显著影响。其留存情况远优于牙医通常对覆盖牙尖或复杂银汞合金修复体寿命的估计。
