Wilding R J, Levin I, Pepper R
Department of Prosthetic Dentistry, University of the Western Cape, Tygerberg, Republic of South Africa.
J Oral Rehabil. 1987 Nov;14(6):557-67. doi: 10.1111/j.1365-2842.1987.tb00752.x.
The purpose of the study was to determine the accuracy of measurements made of the mandible from panoramic radiographs. A comparison was made between measurements made directly from dry mandibles, and measurements made from panoramic radiographs of the same mandibles. The use of linear proportions reduced the errors of successive radiographic observations but failed to reveal left- and right-side differences. A method was developed to demarcate two areas of the radiograph, one of which was defined by the crest of the residual alveolar ridge and the other independent of the alveolar ridge. Both areas were measured and their proportions calculated for each mandible observed. This proportional value was referred to as the Area Index. The method was applied to panoramic radiographs of individuals with complete dentitions. The inter-observation error of the Area Index was found to be 4.9%. It was concluded that, in selected cases, panoramic radiographs can be used to provide information about resorption of the residual mandibular alveolar bone.
本研究的目的是确定从全景X线片测量下颌骨的准确性。对直接从干燥下颌骨上进行的测量与从相同下颌骨的全景X线片上进行的测量进行了比较。使用线性比例减少了连续X线观察的误差，但未能揭示左右侧差异。开发了一种方法来划分X线片的两个区域，其中一个区域由残余牙槽嵴顶定义，另一个区域与牙槽嵴无关。对每个观察到的下颌骨测量这两个区域并计算它们的比例。这个比例值被称为面积指数。该方法应用于全口牙列个体的全景X线片。发现面积指数的观察间误差为4.9%。得出的结论是，在选定的病例中，全景X线片可用于提供有关残余下颌牙槽骨吸收的信息。
