目的应用McNamara分析法对安氏Ⅱ类1分类错畸形进行头影测量,探讨其对安氏Ⅱ类1分类错畸形诊断、治疗的意义。方法选择安氏Ⅱ类1分类错畸形患者60例,拍摄X线头颅定位侧位片,进行McNamara分析,得到7项相关指标。应用SPSS 17.0进行统计分析。结果①男性安氏Ⅱ类1分类错畸形患者有效上颌长度、上颌突距大于男性正常(P<0.05);②女性安氏Ⅱ类1分类错畸形患者有效上颌长度、下颌突距、上切牙突距均大于女性正常(P<0.05)。③男性拔牙患者上颌突距,上切牙突距及下切牙突距明显大于男性非拔牙患者(P<0.05)。④女性拔牙患者上颌突距明显大于女性非拔牙患者(P<0.05)。结论 McNamara分析法的部分数据对安氏Ⅱ类1分类错畸形的诊断及矫治设计有参考价值;男性患者上颌突距大于正常值的17.10%同时上下切牙突距分别大于正常值的54.03%和60.61%时可考虑拔牙。女性患者上颌突距大于正常值的36.71%时可考虑拔牙。 Objective To evaluate the diagnosis and treatment of Angle Class Ⅱ division 1 malocclusion by using the McNamara analysis for Cephalometric Class Ⅱ Division 1 malocclusion. Methods Sixty patients with Angle Class Ⅱ Division 1 malocclusion were selected and the X-ray skull positioning lateral radiographs were taken for McNamara analysis. Seven related indicators were obtained. SPSS 17.0 was used for statistical analysis. Results ① The effective maxillary length and maxillary maxillary distance in male patients with Class Ⅱ division 1 malocclusion were greater than those in male normal group (P <0.05). ② The effective maxillary length, mandibular pitch, The maxillary incisors were longer than female normal (P <0.05). (3) The maxillary distance, the maxillary incisors and the incisors of the maxillary incisors in male patients were significantly larger than those in non-extracavitary patients (P <0.05). ④ The maxillary protrusion distance of female tooth extraction patients was significantly larger than that of female non-tooth extraction patients (P <0.05). Conclusion Some data of McNamara analysis is valuable for the diagnosis and treatment of Angle Class Ⅱ Division 1 malocclusion.Up to the maxillary protrusion of male patients was 17.10% greater than normal and the maxillary and maxillary incisors were 54.03% And 60.61% can be considered when extracting teeth. Female patients with maxillary protrusion greater than the normal 36.71% can be considered when the tooth extraction.