Gracis S E, Nicholls J I, Chalupnik J D, Yuodelis R A
Department of Restorative Dentistry, University of Washington School of Dentistry, Seattle 98195.
Int J Prosthodont. 1991 May-Jun;4(3):282-91.
The damping effect of five restorative materials used to veneer test crowns rigidly connected to a Brånemark implant and subjected to an impact force was measured. These materials included a gold alloy; a noble metal ceramic alloy; porcelain; a laboratory-processed, light-activated microfilled resin; and a heat- and pressure-polymerized poly(methyl methacrylate) resin. The two resins were found to reduce the impact force by about 50% when compared to porcelain or the alloys. The clinical significance of the results is discussed.
测量了用于覆盖牢固连接至Brånemark种植体并承受冲击力的测试牙冠的五种修复材料的阻尼效果。这些材料包括一种金合金；一种贵金属陶瓷合金；瓷；一种实验室加工的光固化微填料树脂；以及一种热压聚合的聚甲基丙烯酸甲酯树脂。与瓷或合金相比，发现这两种树脂可将冲击力降低约50%。讨论了结果的临床意义。
