Liljeborg A, Johannsen G, Rydén H
Swed Dent J. 1985;9(5):213-8.
The laser reflection method of remote measurements permits registration of small tooth movements. Its precision was investigated by studying the errors associated with patient repositioning in the apparatus using the computer controlled image scanner OSIRIS. Fifty repositionings of healthy subjects were evaluated. The results show that the mean error of repositioning is 2.8 micron laterally and 9.2 micron sagittally. This agrees with earlier manual-visual measurements but the higher precision due to computer evaluation of the speckle patterns gives much more reliable estimate of the repositioning error. The study confirms the fact that the laser reflection method permits accurate measurements of tooth movements.
激光反射法进行的远程测量能够记录牙齿的微小移动。通过使用计算机控制的图像扫描仪OSIRIS研究与患者在仪器中重新定位相关的误差，对其精度进行了调查。对50名健康受试者的重新定位进行了评估。结果表明，重新定位的平均误差在横向为2.8微米，矢状向为9.2微米。这与早期的手动视觉测量结果一致，但由于对散斑图案进行计算机评估而具有更高的精度，从而能够更可靠地估计重新定位误差。该研究证实了激光反射法能够精确测量牙齿移动这一事实。
