锥形锁柱种植系统种植体和基台折断原因分析

Analysis of Reasons for the Fracture of Implant and Abutment of Tapered Lock Post

目的:分析种植体或基台折断临床原因,探讨预防方法。方法:选取9例患者,4枚发生种植体折断,7枚发生基台折断,对折断的患者是否存在副功能、冠高度空间及咬合面形态等进行统计,分析临床原因。结果:1枚种植体、3枚实心基台和2枚空心基台折断的主要原因是副功能;3枚种植体和1枚空心基台折断的主要原因是冠高度空间过大;1枚实心基台折断主要原因是咬合面牙尖斜度过大。结论:种植体或者基台折断是多种原因共同作用结果,而副功能、冠高度空间过大和修复体咬合面牙尖斜度过大会增加其折断几率,临床上应谨慎对待。

Objective:To analyze the clinical causes of implant or abutment fracture and explore the preventive methods.Methods:Four implants and seven abutments were broken in 9 patients.The side functions,crown height space,and occlusal surface morphology of the broken patients were counted,and the clinical causes were analyzed.Results:The main factor for the fracture of 1 implant,3 solid abutments,and 2 hollow abutments was the side function.The main factor for the fracture of 3 implants and 1 hollow abutment was the excessive space of crown height.The main factor for the fracture of a solid abutment was the excessive inclination of the cusp of the occlusal surface.Conclusion:The fracture of implant or abutment is the result of multiple factors.The side function,too large crown height space,and too high cusp inclination of the occlusal surface of the prosthesis will increase the fracture probability,which should be treated with caution in clinic.