Rydén H, Bjelkhagen H, Mårtensson B
Am J Orthod. 1982 Apr;81(4):310-3. doi: 10.1016/0002-9416(82)90217-2.
A new accurate method for comparing tooth positions on dental casts at different stages is described. Holograms of casts were prepared with a helium-neon gas laser. For evaluation of tooth movements, a cast and hologram representing different time points were superimposed by means of an adjustable x-y stage. Occlusal surface detail was used as a reference for the superimposition. Positional changes of the upper incisors were detected as discrepancies between the cast and the hologram image.
描述了一种用于比较不同阶段牙模上牙齿位置的新的精确方法。使用氦氖气体激光器制备牙模的全息图。为了评估牙齿移动情况，通过一个可调节的x-y平台将代表不同时间点的牙模和全息图叠加在一起。咬合面细节被用作叠加的参考。上切牙的位置变化被检测为牙模和全息图图像之间的差异。
