engleski

Clinical bone densitometric evaluation of the mandible in complete denture wearers dependent on some morphometric indices

The objective of this study was to determine whether the mandibular bone mineral density (BMD) is correlated with some mandibular morphometric indices on panoramic radiograph (PR). In a total of 72 dental PRs the following parametars were evaluated: MI=thickness of the mandibular cortex below the mental foramen, AI=thickness at the antegonion and GI= thickness at gonion and MCI = mandibular cortical index, based on the assessment of the 3 categories of cortical appearence due to the resorptive changes. There were 28 male patients (mean age 72, 7 ; range 56 to 84 years) and 44 female patients (mean age 69, 7 ; range 48 to 86 years). Using the dental PRs and copper stepwedge, the mandibular BMD was investigated densitometrically. All the BMD values were expressed in equivalents of the actual stepwedge thickness. The results revealed significant positive correlation between AI, MI and GI and all the measured regions of interest (ROI) on the mandible, which comprised the density of cortical and trabecular bone together (p<0.05). The thickness of AI, MI and GI was not significantly correlated with the ROIs which comprised the density of cortical bone alone (p>0.05). MCI was significantly correlated with cortical bone density alone (p<0.05), while it was not significantly correlated with cortical and trabecular bone density together (p>0.05). The use of morphometric indices and clinical bone densitometry on PRs may be helpful for general dental practitioners in the assessment of the local quality of the mandibular bone structure and osteopenia.

bone densitometry ; stepwedge

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