Kohavi D, Becker A, Zilberman Y
Am J Orthod. 1984 Jan;85(1):72-7. doi: 10.1016/0002-9416(84)90124-6.
Twenty-three patients who had completed orthodontic treatment for the resolution of unilateral palatal canine impactions were examined 2.3 years (mean) after all appliances were discarded. The patients were divided into two groups on the basis of whether the surgical exposure was "light" or "heavy." The whole group was also divided according to the type of orthodontic movement that was carried out--"light" for tipping, extrusive, and rotating movements and "heavy" for root movements. Final position of the teeth was classified as ideal or incomplete if rotations or spaces were present. The results showed marked deteriorative changes where the surgery had been more radical and where the tooth movement involved active alteration of root position. No change due to abnormal tooth position was seen. It is suggested that, in these cases, surgical procedures be limited in scope and that exposure of the cementoenamel junction be avoided.
23名因单侧腭侧尖牙阻生而完成正畸治疗的患者，在所有矫治器拆除2.3年（平均）后接受了检查。根据手术暴露是“轻度”还是“重度”，将患者分为两组。整个组还根据所进行的正畸移动类型进行了划分——倾斜、伸出和旋转移动为“轻度”，牙根移动为“重度”。如果存在旋转或间隙，则将牙齿的最终位置分类为理想或不完全理想。结果显示，在手术更为彻底以及牙齿移动涉及牙根位置主动改变的情况下，出现了明显的恶化变化。未观察到因牙齿位置异常导致的变化。建议在这些病例中，限制手术范围并避免暴露牙骨质釉质界。
