Department of Orthodontics, University of North Carolina, Chapel Hil, USA.
Am J Orthod Dentofacial Orthop. 2012 Sep;142(3):410-8. doi: 10.1016/j.ajodo.2012.01.018.
Our objectives were to develop a reproducible method of superimposing 3-dimensional images for measuring soft-tissue changes over time and to use this method to document changes in lip position after the removal of orthodontic appliances.
Three-dimensional photographs of 50 subjects were made in repose and maximum intercuspation before and after orthodontic appliance removal with a stereo camera. For reliability assessment, 2 photographs were repeated for 15 patients. The images were registered on stable areas, and surface-to-surface measurements were made for defined landmarks.
Mean changes were below the level of clinical significance (set at 1.5 mm). However, 51% and 18% of the subjects experienced changes greater than 1.5 mm at the commissures and lower lips, respectively.
The use of serial 3-dimensional photographs is a reliable method of documenting soft-tissue changes. Soft-tissue changes after appliance removal are not clinically significant; however, there is great individual variability.
我们的目标是开发一种可重复的方法，用于叠加三维图像，以测量随时间推移的软组织变化，并使用这种方法记录正畸矫治器去除后唇部位置的变化。
使用立体相机，在休息和最大咬合时，对 50 名受试者在正畸矫治器去除前后进行三维摄影。为了进行可靠性评估，15 名患者的 2 张照片重复拍摄。对稳定区域进行图像配准，并对定义的标志点进行表面到表面的测量。
平均变化低于临床意义水平（设定为 1.5 毫米）。然而，分别有 51%和 18%的受试者在口角和下唇处的变化大于 1.5 毫米。
使用连续的三维照片是记录软组织变化的可靠方法。矫治器去除后的软组织变化无临床意义，但个体差异很大。
