Devlin H, Horner K
Department of Restorative Dentistry, University Dental Hospital of Manchester, UK.
J Dent. 1991 Apr;19(2):116-20. doi: 10.1016/0300-5712(91)90102-5.
The aim of this study was to determine whether bone mineral content could be estimated densitometrically using dental panoramic tomograms. A nickel stepwedge was attached to the film cassette to give a reference image on the radiographs. Four mandibles were radiographed and the optical density of a number of sites on the bone images measured. The calcium and phosphate content of the mandibles at these sites was measured by chemical analysis, using 3 mm diameter full thickness cores. The radiographically derived equivalent nickel thickness of the mandibular test sites was significantly correlated with calcium content (r = 0.62. P = 0.013), phosphate content (r = 0.633, P = 0.011), and dry bone weight (r = 0.541, P = 0.036), provided correction for soft tissue thickness was made. A clinical study is justified to determine whether the technique has sufficient accuracy to provide sequential data on individual patients and whether it may useful as a simple method of screening patients for mandibular osteoporosis.
本研究的目的是确定是否可以使用牙科全景体层摄影术通过密度测定法估算骨矿物质含量。将一个镍阶梯楔形块附着在暗盒上，以便在射线照片上获得参考图像。对四个下颌骨进行了放射摄影，并测量了骨图像上多个部位的光学密度。使用直径3毫米的全厚度芯样，通过化学分析测量这些部位下颌骨的钙和磷含量。经软组织厚度校正后，下颌骨测试部位的射线照相得出的等效镍厚度与钙含量（r = 0.62，P = 0.013）、磷含量（r = 0.633，P = 0.011）和干骨重量（r = 0.541，P = 0.036）显著相关。有必要进行一项临床研究，以确定该技术是否具有足够的准确性来提供个体患者的连续数据，以及它是否可用作筛查下颌骨骨质疏松症患者的一种简单方法。
