Hekmatin Ehsan, Ahmadi Seyed Sina, Ataiekhorasgani Masoud, Feizianfard Mahboobe, Jafaripozve Shahram, Jafaripozve Nasim
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Isfahan University of Medical Sciences, Tehran, Iran.
Department of Internal Medicine, Faculty of Medicine, Isfahan University of Medical Sciences, Tehran, Iran.
J Res Med Sci. 2013 Nov;18(11):951-5.
Osteoporosis is one of the most common bone diseases that is characterized by a generalized reduction of the bone mass. Osteoporotic fractures are associated with morbidity, but can be a predictable condition if early diagnosis is made.The diagnosis is based on the World Health Organization's (WHO) T-score criteria. Panoramic images have been also used to predict low bone mineral density. The aim of the study was to evaluate the prediction of lumbar spine bone mineral density (BMD) from the mandibular cortical width in postmenopausal women.
On the panoramic radiographic images, the mandibular cortical width (MCW) was measured by drawing a line parallel to the long axis of the mandible and another line tangential to the inferior border of mandible and a constructed line perpendicular to the tangent intersecting inferior border of mental foramen and analyzed the correlation of recorded MCW with BMD and T-score by using SPSS software and linear regression and bivariate correlation tests.
Bivariate correlation showed a significant correlation between BMD and MCW (r = 0.945) (P = 0. 000). There was also a significant correlation between T-score and MCW(r = 0.835) (P = 0. 000). To detect the accurate association between the BMD and MCW and also T-score and MCW, linear regression analyses tests showed two associations to predict the BMD and T-score from MCW with confidence interval of 95%. These associations were as follows: T-score= -7.087 + 1.497 × MCW BMD= 0.334 + 0.163 × MCW.
The MCW is a good index to help the dentists to predict the osteoporosis by panoramic radiographs and have a significant role in patient screening and early diagnosis of osteoporosis.
骨质疏松症是最常见的骨病之一，其特征是骨量普遍减少。骨质疏松性骨折与发病率相关，但如果能早期诊断，这是一种可预测的病症。诊断基于世界卫生组织（WHO）的T值标准。全景图像也已用于预测低骨矿物质密度。本研究的目的是评估绝经后女性下颌骨皮质宽度对腰椎骨矿物质密度（BMD）的预测价值。
在全景放射图像上，通过绘制一条与下颌骨长轴平行的线、另一条与下颌骨下缘相切的线以及一条垂直于切线且与颏孔下缘相交的构建线来测量下颌骨皮质宽度（MCW），并使用SPSS软件以及线性回归和双变量相关性检验分析记录的MCW与BMD和T值之间的相关性。
双变量相关性显示BMD与MCW之间存在显著相关性（r = 0.945）（P = 0.000）。T值与MCW之间也存在显著相关性（r = 0.835）（P = 0.000）。为了检测BMD与MCW以及T值与MCW之间的准确关联，线性回归分析测试显示有两种关联可用于以95%的置信区间从MCW预测BMD和T值。这些关联如下：T值 = -7.087 + 1.497×MCW；BMD = 0.334 + 0.163×MCW。
MCW是帮助牙医通过全景X线片预测骨质疏松症的良好指标，在患者筛查和骨质疏松症的早期诊断中具有重要作用。
