头帽配合2×4矫治器治疗混合牙列期安氏Ⅱ类1分类错(牙合)

The combined effects of headgear and 2×4 edgewise appliance in treatment of Class Ⅱ Division 1 malocclusion in mixed dentition

目的探讨混合牙列期简易而适用的治疗方法。材料与方法选择混合牙列期轻度至中度安氏Ⅱ类1分类牙列拥挤患者8例,男2例,女6例,初诊年龄8～11岁,上颌采用头帽和2×4矫治器,下颌放置固定舌弓。结果治疗结束时磨牙和尖牙关系均为Ⅰ类关系,前牙覆盖明显减小,侧面型有所改善。头影测量分析 SNA 角和 ANB 角明显减小,下切牙唇倾略有减小,而上切牙较治疗前唇倾度显著减小。下颌平面、(牙合)平面相对前颅底平面角度略有增加,腭平面角度较治疗前增加。结论联合牵引头帽配合2×4矫治器和舌弓的应用,在矢状方向上可抑制上颌的生长,早期利用替牙间隙可控制下牙弓长度,因而有效地治疗混合牙列期伴有牙列拥挤的轻、中度Ⅱ类1分类错(牙合)。

Objective To investigate a simple and applicable method in treatment of Class Ⅱ malocclusion in mixed dentition. Methods Eight patients aged from 8 - 11 with Class Ⅱ division 1 malocclusion and moderate crowding were selected. Treatment involved included headgear and 2 × 4 edgewise appliance in maxillaand fixed lingual arch in mandible. Results Class Ⅰ molar and canine relationships were achieved after the treatment. The overjet was significantly decreased, and the profile was remarkable improved. The treatment results of cephalometric analysis showed that the value of SNA and ANB decreased, and the upper incisors significantly retroclined. The angle between palatal plane and SN increased. Conclusion The use of headgear and 2 × 4 edgewise appliance combined with lingual arch is effective in the treatment of Class Ⅱ malocclusion with moderate crowding in mixed dentition. The growth of the maxilla can be restrained and significant spaces can be gained by headgear and lingual arch in upper and lower arches.