根管壁缺损对玻璃纤维桩修复体疲劳强度的影响  

Influence of root canal wall defect on restorations with prefabricated fiber posts

作　　者：刘鹏[1] 谢秋菲[1] 

机构地区：[1]北京大学口腔医学院修复科,硕士生北京100081

出　　处：《口腔颌面修复学杂志》2010年第1期5-7,共3页Chinese Journal of Prosthodontics

摘　　要：目的:观察根管壁缺损模式对预成玻璃纤维桩修复体疲劳强度的影响。方法:收集18颗离体上中切牙,均分为3组。截冠后将根管壁预备为重度、中度、轻度3种不同的缺损模式,用玻璃纤维桩修复样本后测试其疲劳强度和残余抗折强度。结果:轻度缺损组疲劳强度最高,重度缺损组次之,中度缺损组疲劳强度最低(P<0.05)。轻度缺损组的残余抗折强度为383.80±138.94N。结论:根管壁缺损模式对预成玻璃纤维桩修复体的抗疲劳强度有一定影响。颈部根管壁薄弱会降低玻璃纤维桩修复体的疲劳强度。Objective: To observe the influence of defect modes on the fatigue strength of glass fiber post restoration. Methods: Collected 18 intact maxillary central incisors and divided into 3 groups (n=6). The crowns were removed and prepared into 3 defect types: severe damage, moderate damage, and slight damage. All the roots were restored with glass fiber posts and tested the fatigue strength. Then tested the residual strength of survival specimens. Results: slight damaged group demonstrated the best result and s...

关 键 词：玻璃纤维桩 粘接性树脂水门汀 根管壁缺损 疲劳强度 咀嚼循环 

分 类 号：R783.3[医药卫生—口腔医学]