Ward V J
J Periodontol. 1976 Sep;47(9):525-30. doi: 10.1902/jop.1976.47.9.525.
A radiographic method of measurement of the depth of labial vestibule in the mandibular anterior region has been described. Contrast medium was applied to the lip and mucobuccal fold and radiopaque marker attached to the labial surface of each tooth. The head was positioned in a craniostat and a posterior-anterior radiograph exposed. The radiopaque boundaries of the vestibule showed on the radiograph so that they could be measured. Statistical analysis showed a recording error of 0.6 mm and an observation error of 0.29 mm, which are within the range of error acceptable for this type of recording technique.
已描述了一种测量下颌前部唇前庭深度的放射照相方法。将造影剂涂于唇部和粘膜颊皱襞，并在每颗牙齿的唇面贴上不透射线的标记物。头部置于头颅固定架中，拍摄后前位X线片。前庭的不透射线边界显示在X线片上，以便进行测量。统计分析显示记录误差为0.6mm，观察误差为0.29mm，均在这类记录技术可接受的误差范围内。
