Kawai S, Kawai M, Nakamura A, Kanaya M, Sakaki T
Department of Orthodontics, Fukuoka Dental College.
Fukuoka Shika Daigaku Gakkai Zasshi. 1990;17(1):75-86.
Two cases of impaction of the mandibular second molar treated by means of orthodontic techniques, were presented. It takes about 6 to 8 months for uprighting mandibular second molar. There is no significant difference in the uprighting times between in the case of extraction of the third molar or not. We consider that the corticotomy of the diatal part of the mandibular second molar shortens the uprighting times of the mandibular second molar. Treatment results of both cases were favorable at 2 years after uprighting of the mandibular second molar.
本文报告了两例采用正畸技术治疗下颌第二磨牙阻生的病例。直立下颌第二磨牙大约需要6至8个月。拔除或不拔除第三磨牙，下颌第二磨牙的直立时间无显著差异。我们认为，下颌第二磨牙远中部分的皮质切开术可缩短下颌第二磨牙的直立时间。两例病例在直立下颌第二磨牙2年后的治疗效果均良好。
