前方牵引治疗单侧完全性唇腭裂患者术后前牙反[牙合]畸形的研究

目的探讨前方牵引治疗单侧完全性唇腭裂（UCLP）患者术后前牙反牙合]畸形的效果。方法进行前瞻性临床研究设计，UCLP术后骨性前牙反牙合]患者治疗组18例，年龄9．63±1．24岁，观察对照组14例，平均8．71±1．92岁，均处于生长发育高峰前期。使用前方牵引进行治疗，治疗或观察前后拍摄头颅侧位片并测量，进行成组设计和配对设计t检验。结果UCLP治疗组前方牵引后，上颌骨前移；下颌后移合并后下旋转；上下颌间关系和面型改善明显，上颌与下颌改变的比值为1：1．7。对照组上下颌不调、前牙反覆盖、凹面型加重。结论UCLP术后轻中度骨性前牙反牙合]畸形，前方牵引能够促进上颌骨向前，改善上下颌骨关系和软组织面型，应该早期矫形治疗。

Effects of maxillary protraction in pre-pubertal patients with unilateral cleft lip and palate

Objective To investigate the effects of maxillary protraction on anterior crossbite in repaired pre-pubertal patients with complete unilateral cleft lip and palate(UCLP).Methods Prospective controlled clinical trial was carried out.Eighteen UCLP patients with anterior crossbite,aged 9.63±1.24 years,were the experimental subjects.Fourteen UCLP patients with similar malocclusion,aged 8.71±1.92 years,were selected as controls.All patients were before puberty according to the evaluation of the hand wrist radiograms.A Hyrax appliance and reverse headgear were applied.Lateral cephalometric radiographs were taken before and after the treatment.Computerized cephalometric analysis was carried out.Results After treatment in experimental group.the maxilla moved forward more significantly.The mandible rotated downward and backward.The intermaxillary relationship and soft tissue profile improved significantly.The rate of maxillary and mandibular Contribution was 1:1.7. ConelusionsMaxillary protraction could improve the imermaxillary relationship and soft tissue profile in UCLP patients with mild or moderate skeletal deformity before puberty.