Rydén H, Bjelkhagen H, Sandström U
J Periodontol. 1979 May;50(5):265-9. doi: 10.1902/jop.1979.50.5.265.
An improved apparatus has been constructed which is based upon the laser reflexion method and is used in a highly accurate direct technique of measuring tooth movement without contact. The possibility of making clinical investigations of tooth movements with the equipment has been investigated by testing its various components. The most critical part of the system is the repositioning of the patient, which has been done with an accuracy of +/- 20 micron. The reflected pattern used during 3 months of experiments was the same. The instrument can be used for measurements down to 50 micron.
一种改进的仪器已被制造出来，它基于激光反射法，用于一种高精度的、非接触式直接测量牙齿移动的技术。通过测试其各个部件，研究了使用该设备进行牙齿移动临床研究的可能性。该系统最关键的部分是患者的重新定位，其定位精度达到了±20微米。在3个月的实验中使用的反射模式是相同的。该仪器可用于低至50微米的测量。
