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目的总结应用口外弓推磨牙向远中移动,矫治安氏Ⅱ类Ⅰ分类错畸形的经验。方法选择安氏Ⅱ类Ⅰ分类错病例12例,采用口外弓推磨牙向远中移动,结合Ⅱ期方丝弓矫治技术,矫治治疗结束后,戴用保持器保持。结果8例使用口外弓6个月后效果显著,磨牙可达到中性或牙尖交错关系;3例使用口外弓7-8个月后才有显著效果;1例8个月后出现上颌第一磨牙出现反,经用横腭杆调整后磨牙关系正常。结论安氏Ⅱ类Ⅰ分类错的一些临界拔牙病例经口外弓推磨牙向远中移动,再行二期标准方丝弓矫治治疗的方法具有矫治时间短、不需要拔牙、简便、安全有效的优点。
OBJECTIVE: To summarize the experience of application of extracorporeal bowel molars moving to the far and correcting Class Ⅱclass Ⅰ malocclusion. Methods Twelve patients with Class Ⅱ division Ⅰ malocclusion were selected. The external arch was used to push the molars to move away from the arch. Combined with the correction technique of stage Ⅱ arch wire, the orthodontic treatment was taken and worn. Results After 6 months of operation, the effect was significant in 6 cases. Molars could reach neutral or cusp-staggered relationship. Three cases had significant effect after 7-8 months with oral arch. One case appeared maxillary first after 8 months Molar teeth appear reversed, the relationship between the molars by adjusting the transverse palate. Conclusion Some cases of Class Ⅱ division Ⅰ malocclusion of critical teeth are moved to the distal part by oral extracorporeal bowel motions. The second stage standard orthodontic arch wire treatment has the advantages of short orthodontic treatment time, simple and safe extraction without tooth extraction.