Department of Dental and Oral Pathology, Kaunas University of Medicine, Eiveniu 2, Kaunas, Lithuania.
Medicina (Kaunas). 2010;46(2):95-103.
The aim of the study was to determine the relationship between bone mineral density in the calcaneus measured using the dual x-ray and laser osteodensitometry technique and bone mineral density in the mandible calculated using the panoramic radiomorphometric indices obtained by applying linear measurements in panoramic radiograms of postmenopausal women.
The participants of this study were postmenopausal women (n=129) aged 50 and more. The subjects underwent panoramic radiography of the mandibles, followed by the calculation of the panoramic radiomorphometric indices indicating bone mineral density of the mandible. The dual x-ray and laser osteodensitometer DXL Calscan were used for the measurements of bone mineral density in the calcaneus. Statistical analysis was preformed to find the relationship between bone mineral density measurements in the two anatomically different bones.
Following the diagnostic criteria for osteoporosis recommended by the World Health Organization (1994), the subjects were distributed according to the calcaneus bone mineral density T-score into the normal bone mineral density (group 1), osteopenia (group 2), and osteoporosis (group 3) groups. Mean bone mineral density in the calcaneus in the general studied population was 0.38+/-0.07; the mean value of bone mineral density of the calcaneus in the group 1 (n=34) was 0.47+/-0.04 (g/cm(2)), in the group 2 (n=65) was 0.37+/-0.03 (g/cm(2)), and in the group 2 (n=30) was 0.29+/-0.03 (g/cm(2)). Differences in bone mineral density between the groups were determined using the analysis of variance (ANOVA) F=285.31; df=2; P<0.001 (T1 vs. T2, P<0.001; T1 vs. T3, P<0.001; T2 vs. T3; P<0.001). A statistically significant correlation was found in the general group between the mental index and bone mineral density in the calcaneus (r=0.356, P<0.001), and between the panoramic mandibular index and bone mineral density in the calcaneus (r=0.397, P<0.001).
Bone mineral density in the calcaneus and the mandible measured using dual energy x-ray and laser osteodensitometer DXL Calscan and by applying panoramic radiography reflect general changes in the mineralization of these bones, characteristic of the postmenopausal period.
本研究旨在确定应用双能 X 射线和激光骨密度仪 DXL Calscan 测量的跟骨骨密度与应用全景放射影像测量指标计算的下颌骨骨密度之间的关系，这些指标是通过对绝经后女性的全景放射影像进行线性测量获得的。
本研究的参与者为年龄在 50 岁及以上的绝经后女性（n=129）。这些受试者接受了下颌骨全景放射摄影，随后计算了指示下颌骨骨密度的全景放射影像测量指标。使用双能 X 射线和激光骨密度仪 DXL Calscan 测量跟骨骨密度。进行了统计分析以确定这两种解剖上不同的骨骼的骨密度测量值之间的关系。
根据世界卫生组织（1994 年）推荐的骨质疏松症诊断标准，根据跟骨骨密度 T 评分将受试者分为正常骨密度（第 1 组）、骨量减少（第 2 组）和骨质疏松症（第 3 组）组。在一般研究人群中，跟骨平均骨密度为 0.38+/-0.07；第 1 组（n=34）的跟骨平均骨密度值为 0.47+/-0.04（g/cm(2)），第 2 组（n=65）为 0.37+/-0.03（g/cm(2)），第 3 组（n=30）为 0.29+/-0.03（g/cm(2)）。使用方差分析（ANOVA）F=285.31；df=2；P<0.001（T1 与 T2，P<0.001；T1 与 T3，P<0.001；T2 与 T3，P<0.001）确定了组间骨密度的差异。在一般组中，发现心理指数与跟骨骨密度之间存在统计学显著相关性（r=0.356，P<0.001），以及全景下颌骨指数与跟骨骨密度之间存在统计学显著相关性（r=0.397，P<0.001）。
应用双能 X 射线和激光骨密度仪 DXL Calscan 以及全景放射摄影测量的跟骨和下颌骨骨密度反映了这些骨骼在绝经后时期矿物质化的总体变化，具有特征性。
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