内置式牵张成骨术在矫治火器伤性下颌骨畸形中的应用

目的:探讨内置式牵张成骨术矫治火器伤性下颌骨畸形临床应用的可行性。方法:为3例火器伤性下颌骨畸形患者延期(伤后2～3个月)行内置式牵张成骨术。术中常规截骨,制作骨转移盘,固定内置式骨牵张器,术后1周以每日1 mm的速度行骨牵引(8～22 mm)。固定期拍曲面断层片观察新骨生成及畸形矫治状况。结果:治疗按计划完成,无感染等并发症,骨牵引顺利完成;固定期3个月时,新生骨骨质、骨量良好,下颌骨畸形矫治效果满意,咬合关系良好。结论:在早期合理清创基础上,延期牵张成骨术可有效地矫治火器伤性下颌骨畸形,值得推广。

Internal Distraction Osteogenesis in the Treatment of Mandibular Deformities from Gunshot Wounds

Objective： To summarize restorative results of mandibular deformities from gunshot wounds with the application of internal distraction osteogenesis. Methods： The present report consisted of 3 cases. Installation of internal distraetors started at 2-3 months after injuries. After a week of latency, the distraction started at a rate of 1 mndd, the distraction distance ranged 8~22 ram. The process of bone formation and effects of deformity correction was studied by general observation and panoramic radiography. Results： The patients and distractors were in good condition during the treatment. The bony transport discs were distracted as planned. In the consolidation period of 3 months, the new bone well formed within the distraction gaps, correction of mandibular deformity and restoration of occlusion were satisfied. Conclusion： On the basis of early debridement, the mandibular deformity could be corrected by the internal distraction osteogenesis effectively.