国产陶瓷托槽在近远中倾斜力下断裂强度的实验研究  

Fracture strengths of domestic ceramic orthodontic brackets during mesial-distal archwire tipping

作　　者：杨力[1] 封平平[1] 白玉兴[1] 王邦康[1] 谢志鹏[2] 秦晓桐[3] 

机构地区：[1]首都医科大学口腔医学院正畸科,北京100050 [2]清华大学材料系 [3]北京理工大学物理教研室

出　　处：《北京口腔医学》2007年第4期199-201,共3页Beijing Journal of Stomatology

摘　　要：目的评价自主研发的国产多晶体氧化铝陶瓷托槽在近远中倾斜力作用下的断裂强度是否满足临床使用需要。方法检测自主研发的国产陶瓷托槽在近远中倾斜力作用下的断裂力和力矩,并与临床常用的进口陶瓷托槽Crystaline IV作对比。结果在近远中倾斜力作用下,国产陶瓷托槽断裂时槽沟处的力为(4159.3±881.8)gm,力矩为(16179.8±3430.2)gm-mm,与Crystaline IV无显著性差异。结论国产陶瓷托槽在近远中倾斜力作用下的断裂强度能够满足临床使用的需要。Objective To evaluate the fracture strengths of the domestic polycrystalline alumina orthodontic brackets developed by the authors during mesial-distal archwire tipping. Methods The fracture force and moment of domestic ceramic brackets during mesial-distal arch wire tipping of the domestic polycrystalline alumina orthodontic brackets were measured by using the special device developed also by the authors. Crystaline IV bracket, which was commonly used in clinic, served as control. Results The fracture force and moment of domestic ceramic brackets during mesial-distal arch wire tipping were （4159.3±881.8） gm and （16179.8±3430.2） gm-mm. There were no significant differences in fracture force and moment between the two types of brackets. Conclusion The fracture strength of domestic ceramic brackets during mesial-distal archwire tipping can meet the reqirements of clinical orthodontic treatment.

关 键 词：国产 陶瓷托槽 断裂强度 

分 类 号：R783.5[医药卫生—口腔医学]