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目的:探讨替牙期重度骨性前牙反前方牵引治疗前后软硬组织的变化。方法:选择40例替牙期轻中度和重度骨性前牙反患者,单纯使用前方牵引器进行矫治。每例患者在矫治前后分别拍摄头颅定位侧位片,采用传统头影测量方法和Pancherz头颅参照系统对治疗前后的软硬组织变化进行分析比较。结果:前方牵引治疗结束后,两组患者前牙反解除,建立了正常的覆覆盖关系,磨牙关系基本中性,Ⅲ类骨面型明显改善。结论:①同时伴有上颌骨后缩和下颌骨前突的重度骨性前牙反病例,应早期进行前方牵引。②重度骨性前牙反前方牵引后,骨性变化(26%)明显小于轻中度组骨性变化(42%)。③单纯采用前方牵引治疗替牙期重度骨性前牙反病例,其软组织侧貌及骨骼改形均有显著性变化。
Objective: To investigate the changes of soft and hard tissue before and after anterior skeletal traction in severe periodontal diseases. Methods: Forty patients with mild to moderate skeletal anterior skeletal anterior thoracic anastomosis were selected and treated by anterior traction alone. Before and after treatment in each patient were taken skull positioning lateral radiographs, the use of traditional cephalometric methods and Pancherz skull reference system before and after treatment of the changes in the analysis of hardware and software were compared. Results: After the treatment of anterior traction, the anterior crossbite was removed in both groups, and the normal coverage of bruise was established. The molars relationship was basically neutral, and the type Ⅲ osteal surface morphology was significantly improved. Conclusion: ①At the same time, patients with severe anterior skeletal anterior thoracic anastomosis with maxillary retraction and mandibular anterior protrusion should be anteriorly distracted. ② In skeletal anterior skeletal anterior skeletal traction, skeletal changes (26%) were significantly less than those in mild to moderate skeletal changes (42%). ③ The use of anterior traction alone for the treatment of severe skeletal antegrade phalanges cases, the soft tissue profile and bone remodeling have significant changes.