前牙桩冠的根折原因分析和设计改进  

Cause analysis of root fracture in anterior teeth with post crown and its design improvement

作　　者：陈小冬 姜惠芳 于德珍 

机构地区：[1]大连市口腔医院修复科,副主任医师副教授辽宁116021

出　　处：《口腔颌面修复学杂志》2003年第3期179-180,共2页Chinese Journal of Prosthodontics

摘　　要：目的:探讨根管口设计和桩冠修复体类型与前牙桩冠修复后根折的发生的关系。方法:通过46例前牙桩冠修复后出现根折的原因分析和力学讨论,讨论根管设计预备的改进措施。结果:根管口部位的设计和桩冠修复体类型与根折的发生有关。结论:适当偏向非受力侧根管口的设计及设计短轴壁或浅针道于非受力侧根面,选择适当的桩冠修复体类型有利于避免前牙桩冠修复后根折的发生。Objective: To explore the relations between root canal design, post crown type and root fracture after postcrown restoration. Method: Discuss the methods of preventing root fracture by cause analysis of root fracture frommechanical aspect in post crown restored anterior tooth. Results: Positions of the prepared root canal oriface and postcrown types are connected with root fracture. Conclusion: It is useful to prevent root fracture by choosing proper postcrown type, designing proper position and apperance of root canal oriface. It is suggested that root canal oriface properlyinclined to none pin hole at which side are beneficial to root fracture prenention.

关 键 词：桩冠修复 原因 设计 修复体 前牙牙体缺损 牙根折裂 

分 类 号：R783[医药卫生—口腔医学]