von Fraunhofer J A, Curtis P, Sharma S, Farman A G
J Dent. 1989 Aug;17(4):177-83. doi: 10.1016/0300-5712(89)90071-7.
The effects of gamma radiation at therapeutic dosage levels on the physical properties of three anterior (two light-cured and one autocure) composites and a light-cured posterior composite were studied. Gamma radiation had no effect on the autocured composite but had varied effects on the light-cured systems. The diametral tensile strength and dimensional stability were unaffected, water sorption and solubility were reduced but surface and bulk hardnesses were increased with the hardness increases linearly related to the radiation dosage. These effects may arise from continued polymerization of the air-inhibited surface layer and possibility of low molecular weight entities within the matrix. Overall, therapeutic levels of gamma radiation had no detrimental effects on the physical properties of the composite resins.
研究了治疗剂量水平的γ辐射对三种前牙复合树脂（两种光固化和一种自固化）及一种光固化后牙复合树脂物理性能的影响。γ辐射对自固化复合树脂没有影响，但对光固化体系有不同影响。径向拉伸强度和尺寸稳定性未受影响，吸水率和溶解度降低，但表面硬度和体硬度增加，硬度增加与辐射剂量呈线性相关。这些影响可能源于空气抑制表面层的持续聚合以及基体中低分子量物质的可能性。总体而言，治疗水平的γ辐射对复合树脂的物理性能没有不利影响。
