Andreasen J O, Paulsen H U, Yu Z, Ahlquist R, Bayer T, Schwartz O
Department of Oral Surgery and Oral Medicine, University Hospital (Rigshospitalet), Copenhagen, Denmark.
Eur J Orthod. 1990 Feb;12(1):3-13. doi: 10.1093/ejo/12.1.3.
Tooth autotransplantation has recently become a method of treating certain orthodontic problems. Over a 13-year period 370 premolar transplants were monitored by electrometric pulp sensibility testing and radiographic examination for pulp and periodontal ligament healing as well as root growth. This article describes the surgical technique as well as the precision of sensibility testing and radiographic examination for evaluating transplant healing. The sensibility response was found markedly related to the stage of tooth development but not to the type of premolar. The precision of sensibility testing (i.e. deviation of two consecutive measurements at a few weeks' interval) was found to range from 15-36 per cent for the different stages. Film holders were used to standardize the intraoral radiographic exposures. The precision percentage for the measuring technique of tooth length and crown width based on a single radiograph read twice (reading error) ranged from 1.1 to 1.8 with only small variations among the different types of premolar. The precision percentage of the radiographic exposure technique evaluated from two consecutive radiographs (measuring plus exposure error) was found to range from 1.2 to 4.2, again with small variations among the different premolars. The accuracy of the radiographic technique (i.e. deviation of radiographically determined tooth dimensions from the true values) was found to range from 2.0 to 2.9 with only small variation between the various types of premolar. In conclusion the evaluation of electrometric sensibility testing should take into account the stage of root formation of premolars.
牙齿自体移植术近来已成为治疗某些正畸问题的一种方法。在13年的时间里，通过电测牙髓敏感度测试和影像学检查，对370颗前磨牙移植进行了监测，以观察牙髓和牙周膜的愈合情况以及牙根生长情况。本文描述了手术技术以及用于评估移植愈合情况的敏感度测试和影像学检查的精确度。发现敏感度反应与牙齿发育阶段显著相关，而与前磨牙的类型无关。对于不同阶段，敏感度测试的精确度（即相隔几周的两次连续测量的偏差）为15%至36%。使用胶片夹来规范口内影像学曝光。基于一张读两次的根尖片（读数误差）测量牙齿长度和冠宽的测量技术的精确度百分比在1.1至1.8之间，不同类型的前磨牙之间仅有微小差异。从两张连续根尖片评估的影像学曝光技术的精确度百分比（测量加曝光误差）为1.2至4.2，不同前磨牙之间同样只有微小差异。影像学技术的准确性（即影像学确定的牙齿尺寸与真实值的偏差）为2.0至2.9，不同类型的前磨牙之间只有微小差异。总之，电测敏感度测试的评估应考虑前磨牙的牙根形成阶段。
