【摘要】 目的　分析肿瘤术后下颌骨缺损钛板修复的远期失败因素。方法　收集1990～1997年北京医科大学口腔医学院行口腔颌面肿瘤术后钛板即刻修复者97例,术后复查(复查率70.1%)。结果　重建修复术后1～2年是并发症高发期,主要表现为固位螺钉周围骨炎性吸收、螺钉松动、接骨板断裂和皮肤粘膜褥疮性溃疡。结论　放疗致血循环障碍和不适当的应力过度集中是造成此并发症的两个重要因素更多还原

【Abstract】 Objective To assess the long term complications associatd with the application of reconstruction plate. Methods Ninety seven patients underwent immediate repair by using bendable reconstruction plate for maintainance of space and contour following mandibular segmental resection. Of them, 68 cases were followed up for the final outcomes. Results Skin or mucosa perforation occurred 6 cases, instabilization of screws in 22 cases, and broken of plate in 3 cases. The reasons for skin or mucosa perforation was possibly associated with circulatory disturbance due to postoperative irradiation. The bone absorption and screw loosening occured most frequently in bone defect involving mandibular angle and chin. Conclusion High concentration of unrationable stress and irradiation were recognised to be the factors responsible for the perforation of covering tissue and screw loosening. The broken of plate was brought about possibly by stress loading and fatigue weakness of plates.更多还原