Kondo S, Okawa S, Ota M
Shika Rikogaku Zasshi. 1980 Oct;21(56):253-62.
Based on the fracture energy form the compression test of composite resins under the repeated impact loads in compression after stored for a period in water at 37 degrees C, the dynamic durability of commercially used composite resins was evaluated. The results obtained were summarized as follows. (1) The fracture energy of composite resins under the repeated impact compressive loads after stored in water at 37 degrees C is clearly lower than the initial fracture energy. Particularly the decrement of the initial fracture energy for Concise, Epolite 100 and Superlux after stored for 30 days in water at 37 degrees C is influenced considerably both by the physicochemical degradation caused by water and the mechanical deterioration caused by the repeated impact compressive loads, but Clearfil is superior to the mechanical deterioration. (2) In each composite resins, there is a close correlation between fracture energy and compressive strain. In composite resins without Superlux, also a correlation is in fracture energy and compressive strength. (3) In clearfil, concise and Epolite 100, the morphology of fracture in compression test of composite resins which are subjected to and are subjected to the repeated impact loads in compression is classified in a mode of shear fracture, but in Superlux, a mode of crack fracture.
基于在37℃水中储存一段时间后，复合树脂在反复冲击压缩载荷下压缩试验的断裂能，对市售复合树脂的动态耐久性进行了评估。得到的结果总结如下。(1) 在37℃水中储存后，复合树脂在反复冲击压缩载荷下的断裂能明显低于初始断裂能。特别是，Concise、Epolite 100和Superlux在37℃水中储存30天后，初始断裂能的降低受到水引起的物理化学降解和反复冲击压缩载荷引起的机械劣化的显著影响，但Clearfil在机械劣化方面表现更优。(2) 在每种复合树脂中，断裂能与压缩应变之间存在密切相关性。在不含Superlux的复合树脂中，断裂能与压缩强度之间也存在相关性。(3) 在Clearfil、Concise和Epolite 100中，经受反复冲击压缩载荷的复合树脂压缩试验中的断裂形态归类为剪切断裂模式，但在Superlux中为裂纹断裂模式。
