Andreasen J O, Paulsen H U, Yu Z, Schwartz O
Department of Oral Surgery and Oral Medicine, University Hospital (Rigshospitalet), Copenhagen, Denmark.
Eur J Orthod. 1990 Feb;12(1):25-37. doi: 10.1093/ejo/12.1.25.
The purpose of the present investigation was to determine the long-term prognosis of autotransplanted premolars with respect to periodontal healing. The subjects consisted of 195 patients aged 7 to 35 years, with a total of 370 autotransplanted all operated and followed with a standard technique. The observation period ranged from 1 to 13 years. Periodontal healing as demonstrated radiographically was complete in most cases after 8 weeks. Root resorption occurring after transplantation was divided into surface-, inflammatory- and replacement resorption (ankylosis). Root resorption occurred in 52 of the transplanted teeth and was usually diagnosed within 6 months. Root resorption was found to be significantly related to increasing stage of root development and the stage of eruption at the time of transplantation. Subsequent orthodontic movement of teeth with completed root formation at the time of transplantation resulted in a slight increase in the frequency of both surface and inflammatory resorption. The present study indicates that trauma to the PDL of the transplant is the explanatory factor for the development of root resorption.
本研究的目的是确定自体移植前磨牙在牙周愈合方面的长期预后。研究对象为195名年龄在7至35岁之间的患者，共370颗自体移植牙，均采用标准技术进行手术和随访。观察期为1至13年。大多数情况下，术后8周影像学显示牙周愈合完成。移植后发生的牙根吸收分为表面吸收、炎性吸收和替代性吸收（牙根粘连）。52颗移植牙发生了牙根吸收，通常在6个月内被诊断出来。发现牙根吸收与牙根发育阶段的增加以及移植时的萌出阶段显著相关。移植时牙根已完全形成的牙齿随后进行正畸移动，导致表面吸收和炎性吸收的频率略有增加。本研究表明，移植牙牙周膜的创伤是牙根吸收发生的解释因素。
