摘要
目的试探讨可用于判别手术与非手术治疗安氏Ⅲ类错畸形患者替牙期颅面牙特征的方法。方法早期治疗组为28例替牙期解除前牙反的安氏Ⅲ类错畸形患者(男性16例,女性12例),替牙期拍摄头颅侧位片的平均年龄为(9.1±1.4)岁,在恒牙期采用非拔牙矫治。手术治疗组为21例随生长发育成为严重骨性安氏Ⅲ类错畸形患者(男性12例,女性9例),替牙期拍摄头颅侧位片的平均年龄为(10.0±2.0)岁,最终接受正颌手术治疗。结果早期治疗组与手术治疗组上下齿槽座点连线与下颌平面的夹角(AB-MP)分别为65.1°和61.2°,差异有统计学意义(P<0.05);上颌切牙长轴与上下齿槽座点连线的夹角(U1-AB)分别为23.1°和27.3°,差异有统计学意义(P<0.05)。结论个体指数(IS)=0.164×(AB-MP)-0.15×(U1-AB)-6.675。当安氏Ⅲ类错畸形患者的IS>0时,其较适合在替牙期进行早期矫治;IS<0,患者更适合进行手术矫治。
Objective To establish a model of cephalometric variables for identification of indication of early treatment of class m malocclusion in mixed dentition. Methods Cephalograms taken in the mixed dentition were available for twenty-eight patients （ 16 males, 12 females, mean age： 9. 1 ± 1.4 years） in early treatment group and twenty-one patients （12 males, 9 females, mean age： 10.0 ± 2. 0 years） in orthognathic surgery group. Patients in early treatment group received successful treatment to correct anterior crossbites in mixed dentition and later received non-extraction comprehensive treatment in permanent dentition. Patients in orthognathic surgery group received orthognathic surgery after growth ceased. Results The mean value of AB-MP in early treatment and orthognathic surgery groups was 65.1° and 61.2°, respectively （P 〈0. 05）. The mean value of the angle between upper incisor inclination and AB line was 23.1° in early treatment group and 27. 3 ° in orthognathic surgery group （ P 〈 0. 05 ）. Conclusions The resulting equation was： individual score（IS） =0. 164× （AB-MP） -0. 15 × （U1-AB） -6. 675. When IS 〉 0, greater success in early treatment of class m malocclusion in mixed dentition was expected and when IS 〈 0, delayed treatment with orthognathic surgery is recommended.
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2006年第11期656-658,共3页
Chinese Journal of Stomatology
