正畸骨粘接体最大负载力的动物实验  

Maximum resistance strength of the bone-bonding screw orthodontic anchorage

作　　者：谢贤聚[1] 白玉兴[1] 吕婴[1] 高伟民[1] 

机构地区：[1]首都医科大学口腔医学院正畸科,北京100050

出　　处：《中华口腔医学杂志》2009年第9期535-537,共3页Chinese Journal of Stomatology

基　　金：北京市自然科学基金（7082040）

摘　　要：目的通过动物实验研究自行设计的一种新型正畸支抗，即两段式骨粘接体的最大负载力，探讨骨粘接体的生物力学性能。方法使用α-氰基丙烯酸正丁酯在12只大耳白兔胫骨表面粘接骨粘接体共36枚，分成术后即刻、术后2、4、8周组（每组9枚），分别测量术后不同时间骨粘接体的最大负载力。结果术后即刻、术后2、4、8周组最大负载力的中位数（第25百分位数，第75百分位数）分别为11.55（8.96，12.73）、6.04（1.88，10.57）、2.30（0，3.24）和49.85（20.70，66.01）N。骨粘接体的总脱落率为17％（6／36）。结论本组骨粘接体的最大负载力可满足正畸支抗的临床需要。Objective To investigate the maximum resistance strength of a new orthodontic anchorage system named bone-bonding screw. Methods Thirty-six self-designed two-section bone-bonding screws were bonded to the surface of tibia in 12 rabbits with N-2-butyl cyanoacrylate. The maximum resistance strength of the screws was tested immediately, 2 weeks, 4 weeks and 8 weeks after bonding, respectively. Results The average maximum resistance strengths of the bone-bonding screws immediately, 2 weeks, 4 weeks and 8 weeks after bonding were 11.55（8.96, 12.73）, 6.04 （1.88,10.57）, 2.30（0, 3.24）, and 49.85（20.70,66.01） N, respectively. The difference between each group was statistically significant（P〈0.05）. The failure rate of the bone-bonding screws was 17% （6/36）. Conclusions The maximum resistance strength of the bone-bonding screw could suffice for orthodontics.

关 键 词：正畸支抗 氰基丙烯酸盐类 负载力 

分 类 号：R686[医药卫生—骨科学]