|発表タイトル||A development of “jaw bone density evaluation system” for osteoporosis evaluation|
|学会名||The 4th Sino-Japanese Conference on Stomatology 2008|
|発表者・共同発表者||Takaishi Y, Miki T, Fujita T, Ikeo T, Yoshikawa K, Yamamoto K, Kamada A|
|学会抄録||「Program & Abstracts of the Sino-Japanese Conference on Stomatology 2008」 pp.90-91
「Program & Abstracts of the Sino-Japanese Conference on Stomatology 2008」 pp.90-91
|概要||Objective: The number of osteoporosis patients increases in accordance with age. The same trend is observed in patients with periodontal diseases or with teeth loss. Therefore, osteoporosis may be one of the risk factors of the teeth loss due to reduction of the alveolar bone. Unfortunately clinical methods to evaluate alveolar bone have yet to be established and medical proofs are still insufficient.
We estimated alveolar bone density using a new “mandibular bone density evaluation system” and examined the relationship with osteoporosis to determine whether jaw bone evaluation is clinically useful in assessing osteoporosis.
Methodology: Thirty four postmenopausal female subjects (age: 50-69, average age: 59.9) participated in the experiment. In a simple X-ray scan of mandibular bone, standard substance (aluminum step wedge) was also scanned. The bone density was estimated based on the difference in their rates of transmittance. The correlations among bone mineral density (BMD) by DXA, cortical bone of proper alveolar bone portion and cancellous bone of support alveolar bone portion in mandibular bone were examined.
Results: Cancellous bone density of support alveolar bone (A) and cortical bone density of proper alveolar bone (B) were 87.0±18.1(SD) and 89.9±26.7, respectively. Significant correlation between (A) and (B) was observed (r=0.736,p＜0.01). The correlations of lumber BMD by DXA and BMD (A) and (B) were significant, respectively (r=0.638,p＜0.01, 0.414,p＜0.05).
Conclusion: These results suggest alveolar bone BMD by the jaw bone density evaluation system can be utilized as one of the screening tools for osteoporosis. This system may also utilized in a large scale screening of osteoporosis in the dental fields because of low cost and short period for the evaluation. This system may provide great contributions for osteoporosis patients.