Moenning J E, Garrison B T, Lapp T H, Bussard D A
Int J Adult Orthodon Orthognath Surg. 1990;5(4):225-32.
Occlusal discrepancies that occur after orthognathic surgery in which rigid internal fixation was used are technically difficult to correct. These discrepancies often lead to prolonged postoperative orthodontics and possibly to compromised results. The effectiveness of the removal of rigid internal fixation in correcting these changes was studied retrospectively. Of 169 patients who underwent bilateral sagittal osteotomies of the mandible, 13 developed postoperative malocclusions, and their rigid internal fixation was removed (an average of 21 days postoperatively). Occlusion was improved in 11 of the patients. In the two patients who showed no improvement in occlusion, fixation had been removed at 5 weeks in one and at 6 weeks in the other. One patient had a slight relapse 6 months postoperatively. All other patients had stable occlusions and experienced no complications. Recommendations for use of the technique and potential complications are discussed.
采用坚固内固定的正颌外科手术后出现的咬合差异，在技术上难以纠正。这些差异常常导致术后正畸时间延长，并可能影响治疗效果。本研究对去除坚固内固定以纠正这些变化的有效性进行了回顾性分析。在169例行双侧下颌矢状劈开截骨术的患者中，13例出现术后错牙合畸形，遂去除其坚固内固定（平均术后21天）。11例患者的咬合得到改善。在2例咬合未改善的患者中，1例在术后5周、另1例在术后6周去除了固定装置。1例患者术后6个月出现轻微复发。所有其他患者咬合稳定，未出现并发症。文中讨论了该技术的应用建议及潜在并发症。
