成人严重骨性Ⅲ类错牙合正畸-正颌手术联合矫治临床研究

Study of Orthodontic and Orthognathic Surgical Treatment of severe adult Skeletal Class Ⅲ Malocclusion

目的探讨成人严重骨性Ⅲ类牙颌畸形经正畸—正颌手术联合矫治后颌面软硬组织的变化情况。方法骨性Ⅲ类牙颌畸形病例11例,其中男性6例,女性5例,采用正畸—正颌手术联合矫治。治疗前后拍摄头影测量片,用常规头影测量分析方法进行分析。采用配对t检验分析治疗前后软硬组织测量项目的统计学差异。结果治疗后ANB角显著增加(P<0.05),达到Ⅰ类骨面型;面凸角N’-Sn-Pos平均增大为7.60°(P<0.05);S-N-’Si角与S-N’-Pos角显著减少(P<0.05)。结论骨性Ⅲ类畸形通过正畸-正颌手术联合治疗达到颌骨的Ⅰ类关系,面部软组织侧貌得到明显改善。

Objective To study the changes of skeletal and soft tissue after orthodontic and orthognathic surgical treatment in severe adult class Ⅲ malocclusion.Methods 11 patients with severe skeletal class Ⅲ malocclusion（male 6,female 5）.All the patients were all treated with orthodontic and orthognathic surgery.Lateral cephalometric films taken at the beginning and the end of treatment were analyzed using traditional cephalometric anlaysis.Paired t-test was performed to evaluate the significant treatment change.Results ANB angle was obviously increased（P0.05） and class Ⅰ facial form was attained.N＇-Sn-Pos angle was increased 7.60°（P0.05）,while S-N＇-Si and S-N＇-Pos angle were discreased（P0.05）.Soft tissue profile was improved dramatically.Conclusion Severe adult class Ⅲ malocclusion treated with orthodontic and orthognathic surgery could achieved class Ⅰ skeletal pattern and soft tissue profile could be dramatically improved.