Jonkman R E, van Waas M A, Plooij J, Kalk W
Dept. of Oral Function and Prosthetic Dentistry, University of Nijmegen, The Netherlands.
J Craniomaxillofac Surg. 1991 Jan;19(1):27-30. doi: 10.1016/s1010-5182(05)80268-9.
The aim of this study was to test the accuracy of a setup for measuring alveolar ridge reduction of totally edentulous mandibles and of mandibles with abutment teeth for overdentures, on oblique lateral cephalometric radiographs. For that purpose, a cephalostat was modified so that the patient's head--in particular the mandible--could be fixed in a reproducible manner. Four radiographs were used for measuring all parts of the mandible. To assess the accuracy of the method, two randomly chosen parts of the mandible of 20 patients were X-rayed twice. The radiographs were traced independently by two observers and the height of the mandible was measured along a line drawn perpendicularly to the tangent of the lower border of the mandible on these X-rays. The method appeared to be simple, less time-consuming, and accurate. The average standard deviation of the measurements of the height of the mandible was 0.15 millimetres. When measuring ridge reduction, the standard deviation was 0.21 millimetres.
本研究的目的是在斜侧位头影测量X线片上，检验一种用于测量全口无牙下颌骨以及覆盖义齿基牙下颌骨牙槽嵴吸收情况的装置的准确性。为此，对头影测量仪进行了改良，以便能够以可重复的方式固定患者的头部，特别是下颌骨。使用四张X线片测量下颌骨的各个部位。为评估该方法的准确性，对20名患者下颌骨的两个随机选择部位进行了两次X线检查。由两名观察者独立描绘X线片，并沿垂直于这些X线片上下颌骨下缘切线的直线测量下颌骨的高度。该方法似乎简单、省时且准确。下颌骨高度测量的平均标准差为0.15毫米。测量牙槽嵴吸收时，标准差为0.21毫米。
