成人上颌正中间隙的病因与治疗

目的研究成年患者上颌正中间隙的病因和治疗方案。方法通过收集上颌正中间隙患者34例,运用正畸、修复和手术综合治疗方法恢复患者外观和咬合关系,术前后Downs方法进行头影测量分析。结果正中间隙患者病因包括正中多生牙、过小侧切牙、牙列缺失、唇系带附着过低、牙周病、不良唇习惯等。U1-L1、U1-AP、NPg-FH术前后差异有统计学意义(P<0.05),正畸治疗可以改善上前牙的唇倾,并且可以协调上下颌骨的矢状关系。结论上颌正中间隙的治疗必须解除导致错合畸形的病因,采用多学科综合治疗才能获得稳定和理想的结果。

Objective To study etiologic factors and treatment plan of adult maxillary median diastema. Methods Through gathering 34 patients of adult maxillary median diastema,we applied compositive treatment of orthodontics, prosthetics and operations to restore patients＇ appearance and occlusion relationship.We used Down＇s method to carry out cephalometrics measure and analysis for successive contrast of operations. Results Etiologic factors of median diastema patients include median supplemental teeth, micro-lateral incisor teeth, dentition deletion, low labial frenum attachment, periodontal diseases and ill labial habits etc.There is statistic difference（P〈0.05） before and after operations in U1-L1,UI-AP, NPg- FH operations. Orthodontics can mend labial gradient of superior anterior teeth, and correlate maxilla-mandible arrowy relationship. Conclusion Treatment of maxillary median diastema must relieve factors that lead to malocclusion, and we must adopt multiple-subjects compositive treatment to achieve steady and prospective results.