Xie Min, Hu Min, Liu Hong-chen, Yao Jun, Zhou Hong-zhi
Department of Stomatology, General Hospital of PLA, Beijing 100853, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2006 Jan;41(1):49-51.
To evaluate the quality of the alveolar ridge augmented by Ti-Ni shape memory alloy (Ti-Ni SMA) distractor.
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.
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.
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.
评估钛镍形状记忆合金（Ti-Ni SMA）牵张器增高牙槽嵴的质量。
从12只成年杂种犬拔除所有下颌前磨牙及第一磨牙。1个月后，在左侧下颌骨行盒状截骨术并植入Ti-Ni SMA牵张器。右侧作为空白对照。3或6个月后处死实验犬，从实验侧及对照侧相应区域取材，测量骨密度及生物力学功能。
牵张后3个月，增高牙槽嵴的骨密度、极限抗压强度及杨氏模量低于空白对照。但牵张后6个月这些指标升高，与对照无显著差异。
采用Ti-Ni SMA牵张器通过牵张成骨可增高犬下颌后牙区牙槽嵴，新生骨足以坚固支撑种植体植入。
