钛-镍记忆合金牵张成骨的新生骨骨密度及生物力学测试  

Bone mineral density and biomechanical characters of the augmented alveolar ridge by distraction osteogenesis using Ti-Ni shape memory alloy distractor

作　　者：谢旻[1] 胡敏[1] 刘洪臣[1] 姚军[1] 周宏志[1] 

机构地区：[1]解放军总医院口腔科,北京100853

出　　处：《中华口腔医学杂志》2006年第1期49-51,共3页Chinese Journal of Stomatology

基　　金：国家自然科学基金资助项目(30171017);北京市自然科学基金资助项目(7042058)

摘　　要：目的通过对牵张成骨新生骨的骨密度和生物力学测试,研究钛-镍记忆合金牵张器牵张成骨的质量。方法选用成年杂种犬12只,下颌两侧拔牙后用全埋置钛-镍记忆合金牵张器完成牵张手术,左侧为实验侧,右侧为自身对照。分别在牵张完成后3、6个月进行双能X线骨密度测量和压缩生物力学测试。结果术后3个月,牵张区新生骨骨密度、抗压强度、弹性模量低于对照侧;6个月,各项指标均有增加,与对照侧的差异无统计学意义。结论用钛-镍记忆合金牵张器牵张,增高犬下颌后牙区牙槽嵴,新生骨质量可以满足种植等后期修复的要求。Objective To evaluate the quality of the alveolar ridge augmented by Ti-Ni shape memory alloy（Ti-Ni SMA） distractor. Methods All of the mandibular premolars and the first molars were extracted from 12 adult mongrel canines. One month later, box-shaped osteotomy was carried out in the left mandibles and Ti-Ni SMA distractors were imbedded. The right sides served as blank control. The canines were killed 3 or 6 months later and specimens were taken from corresponding area of the experiment sides and the control. Bone mineral density and biomechanical function were measured. Results Bone mineral density, ultimate compressive strength and Young＇s Modules of the augmented ridge were lower than the blank control three months after distraction. But the indexes increased and showed no significant difference with the control six months after distraction. Conclusions The canines mandibular posterior alveolar ridge could be augmented by distraction osteogenesis using Ti-Ni SMA distractor, and the new bone is strong enough for implant placement.

关 键 词：牙槽突 骨密度 生物力学 牵引器 

分 类 号：R783[医药卫生—口腔医学]