口腔疾病防治2016，Vol.24Issue(9)：507-510,4.DOI:10.12016/j.issn.2096-1456.2016.09.002
复合树脂高强纤维间隙保持器的抗疲劳强度体外实验
The fatigue resistances of glass fiber reinforced composite resin space maintainers:an in vitro study
摘要
Abstract
Objective To evaluate the fatigue resistances of glass fiber reinforced composite resin (GFRCR) space maintainers and to compare the fatigue resistance of GFRCR space maintainers made of two different kinds of composite resins. Methods 40 extracted human molars were selected. Samples were randomly divided into two groups (n= 20). Space maintainers in group A were made of Z350 composite resin, while space maintainers in group B were made of Grengloo composite resin. All the specimens were exposed to temperature alternating between 5~55 ℃. Then they were placed on the cyclic loading machine to bear cyclic loading and the number of loading times were recorded. The re⁃sults were compared with standard fatigue strength. Results The fatigue resistances of two groups were higher than standard fatigue resistances (P<0.001). The fatigue resistances of two kinds of space maintainers showed no difference (P = 0.886). Conclusion According to the fatigue resistances, GFRCR space maintainers can be clinically used. There were on differences between two kinds of materials in making GFRCR maintainers.关键词
复合树脂高强纤维/间隙保持器/疲劳强度/牙科材料/乳牙早失Key words
Glass fiber reinforced composite resin/Space maintainer/Fatigue resistances/Dental materials/Premature loss of primary teeth分类
医药卫生引用本文复制引用
杨瑾,殷忠平,许艳华..复合树脂高强纤维间隙保持器的抗疲劳强度体外实验[J].口腔疾病防治,2016,24(9):507-510,4.基金项目
国家自然科学基金 （）
