应用三焦点牵引成骨术重建下颌骨缺损的初步临床研究

目的:探讨三焦点牵引成骨技术在下颌骨骨段缺损重建中的应用和在重建骨行种植义齿修复牙列缺失的可行性。方法:4例下颌体骨段切除患者,使用内置式三焦点牵引器同期行下颌骨缺损牵引成骨重建。牵引间歇期8天,牵引速度0.25mm×4次/d,稳定期4个月;1例于稳定期结束后在成骨区行种植义齿修复。结果:下颌骨牵引成骨最长45mm。牵引成骨区骨量充足,组织结构及硬度接近正常颌骨。牵引成骨区种植义齿可满足正常功能的需要。结论:三焦点牵引成骨技术可成功用于下颌骨骨段缺损的功能性重建,并可满足种植义齿修复的要求。

Trifocal distraction osteogenesis for reconstruction of segmental mandibular defects: A preliminary clinical study

PURPOSE: The purpose of this study was to investigate the reconstruction of mandibular segmental defects bydistraction osteogenesis(DO) and the feasibility of dental implantation in regenerated bone. METHODS: Internal trifocaldistractors were used to reconstruct the mandibular segmental defects of 4 cases immediately after the tumors wereresected. After 8 days of latency period, trifocal DO was started at a rate of 0.25mm four times per day at each transportdisk. After distraction period, the distractors were left in place for 16 weeks for consolidation. RESULTS: According tothe distraction design, the mandibular defect was successfully reconstructed from 40 to 45 mm in length without anycomplications. With enough new bone tissue, 1 case out of 4 received two dental implants and achieved initial stabilityafter consolidation period. CONCLUSION: Mandibular segmental defects can be reconstructed by trifocal distractionosteogenesis. The regenerated bone meets the requirements of dental implantation.