预成纤维桩应用于冠改向修复的初步研究  

Fracture load and fracture modes of prefabricated fiber post restoration in different tilted mandible premolars:A pilot study

作　　者：侯永福[1] 朱智敏[2] 

机构地区：[1]合肥市口腔医院种植中心,230001 [2]四川大学华西口腔医院修复科

出　　处：《实用口腔医学杂志》2016年第3期430-431,共2页Journal of Practical Stomatology

摘　　要：将80颗人离体牙模拟不同种倾斜角度(舌侧倾斜30°、15°,颊侧倾斜15°、30°,无倾斜)配伍分10组(n=8),实验组采用预成纤维桩修复,对照组采用钴铬合金铸造桩修复,各组均行铸造金属冠修复。电子万能试验机测试各组抗折载荷。结果显示修复倾斜牙时,纤维桩与铸造桩修复体之间抗折载荷无统计学差异。2种桩修复体受力过载时,主要为不可修复性折裂。根管桩种类与改向角度之间的交互作用没有统计学意义(P>0.05),即根管桩种类与改向角度均不会改变对方对抗折载荷的影响。80 extracted human mandible premolars were divided into 10 groups（ n = 8） based on the post with different tilted angles（ 0°,buccal 15° and 30°,ligual 15° and 30°）. The samples in experiment group were restored with fiber post while in the control group with cast post. Then all the teeth were restored with cast crown and bonded by glass ionomer. Compressive load with the speed of 1. 0 mm / min was applied to the restored teeth with a universal material testing machine until failure and the fracture modes were observed. The fracture load of fiber post and cast post restoration with the same tilted angles was similar（ P〉 0. 05）. The main fracture mode of the teeth in all groups was unfavorable tooth fracture. No significant interaction was observed（ P = 0. 217） between the 2 kinds of post and angulation of tilted teeth.

关 键 词：纤维桩 抗折载荷 倾斜牙 

分 类 号：R783.3[医药卫生—口腔医学]