在颌骨牵张成骨中，缩短治疗时间和促进新骨形成以及设计理想的牵张器一直是研究的热点。
In distraction osteogenesis, researchers always focus on designing perfect distractor to accelerate bone regeneration and to shorten the course of treatment.
结果21例陈旧性颌骨骨折患者术后咬关系恢复，张闭口正常，颌骨形态良好，钛板无松动、移位和排异反应。
Results All the patients had normal jaw morphology, and occlusion relation were restored after operation, and the itanium plate without any rejection reaction, no loosening or displacement.
以上结果为临床颊向牵张治疗偏面小颌畸形提供了有效的实验依据。
The results of the study might provide effective basis on treating HFM in clinic.
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