Ahrens D G, Shapira Y, Kuftinec M M
Am J Orthod. 1981 Jul;80(1):83-91. doi: 10.1016/0002-9416(81)90198-6.
The tendency of rotated teeth to relapse after treatment following retention is partially because of the supra-alveolar fibers which are stretched during rotational correction. Early treatment, overrotation, a long retention period, and proper contouring of contact points have been used to reduce relapse. With several surgical methods, it has been shown that releasing the tension in the periodontal fibers by severing the supracrestal and transseptal fibers significantly reduced relapse tendencies following rotation. This study was designed to test a simple surgical method (Vanarsdall) and to examine the effect of transsecting supra-alveolar fibers in orthodontically rotated teeth. Twelve cases in which a tooth and its antimere were rotated in excess of 10 degrees prior to orthodontic treatment were chosen for this study. One of the two rotated teeth was chosen for the gingival fibrotomy, while its antimere was retained by conventional orthodontic means and served as a control. The incision was made at a 45-degree angle to the long axis of the tooth, on the labial and lingual aspects of each tooth, 2 months prior to debanding. A significant decrease in the amount of relapse up to 30 days following removal of appliances in the fibrotomy group as compared to the control group (0.42 degrees and 5.75 degrees, respectively) suggests that the procedure be considered for overcoming rotational relapse.
旋转牙在治疗后保持期间有复发的倾向，部分原因是在旋转矫正过程中被拉伸的牙槽嵴上纤维。早期治疗、过度旋转、较长的保持期以及适当修整接触点等方法已被用于减少复发。通过几种手术方法已经表明，切断牙槽嵴顶纤维和穿龈纤维以释放牙周纤维中的张力，可显著降低旋转后复发的倾向。本研究旨在测试一种简单的手术方法（范阿斯代尔法），并研究横断牙槽嵴上纤维对正畸旋转牙的影响。本研究选取了12例在正畸治疗前牙齿及其对侧牙旋转超过10度的病例。在两颗旋转牙中选择一颗进行牙龈纤维切断术，而其对侧牙采用传统正畸方法保持并作为对照。在拆除矫治器前2个月，在每颗牙齿的唇面和舌面与牙长轴呈45度角处做切口。与对照组相比，纤维切断术组在拆除矫治器后30天内复发量显著减少（分别为0.42度和5.75度），这表明该方法可用于克服旋转复发。
