Abstract
Introduction
Osteoporosis and tooth loss have been linked with advancing age, but no clear relationship between these conditions has been proven. Several studies of bone mineral density measurements of the jaw and spine have shown similarities in their rate of age-related deterioration. Thus, measurements of jawbone density may predict lumbar vertebral bone density. Using jawbone density as a proxy marker would circumvent the need for lumbar bone measurements and facilitate prediction of osteoporotic spinal fracture susceptibility at dental clinics. We aimed to characterize the correlation between bone density in the jaw and spine and the incidence of osteoporotic spinal fractures.
Methods
We used computerized radiogrammetry to measure alveolar bone mineral density (al-BMD) and dual-energy X-ray absorptiometry to measure lumbar bone mineral density (L-BMD). L-BMD and al-BMD in 30 female patients (average age: 59 ± 5 years) were correlated with various patient attributes. Statistical analysis included area under the curve (AUC) and probability of asymptomatic significance (PAS) in a receiver operating characteristic curve. The predictive strength of L-BMD T-scores (L-BMD[T]) and al-BMD measurements for fracture occurrence was then compared using multivariate analysis with category weight scoring.
Results
L-BMD and al-BMD were significantly correlated with age, years since menopause, and alveolar bone thickness. Both were also negatively correlated with fracture incidence. Category weight scores were −0.275 for a L-BMD(T) <80%; +0.183 for a L-BMD(T) ≥80%; −0.860 for al-BMD <84.9 (brightness); and +0.860 for al-BMD ≥84.9. AUC and PAS analyses suggested that al-BMD had a higher association with fracture occurrence than L-BMD.
Conclusions
Our results suggest the possible association between al-BMD and vertebral fracture risk. Assessment of alveolar bone density may be useful in patients receiving routine dental exams to monitor the clinical picture and the potential course of osteoporosis in patients who may be at a higher risk of developing osteoporosis.
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Acknowledgments
We thank Dr. Tim Werry, Dr. Rebecca Jackson, and Mrs. Yayoi Takaishi for editorial support in the preparation of this manuscript. No funding or sponsorship was received for this study or publication of this article. Dr. Yoshitomo Takaishi is the guarantor for this article and takes responsibility for the integrity of the work as a whole.
Conflict of interest
Dr. Yoshitomo Takaishi, Dr. Seizaburo Arita, Dr. Mitsugi Honda, Dr. Takeshi Sugishita, Dr. Aiko Kamada, Dr. Takashi Ikeo, Dr. Takami Miki, and Dr. Takuo Fujita declare no conflict of interest.
Compliance with Ethics Guidelines
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all patients for being included in the study. This study was approved by the Institutional Review Board of Katsuragi Hospital.
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Takaishi, Y., Arita, S., Honda, M. et al. Assessment of Alveolar Bone Mineral Density as a Predictor of Lumbar Fracture Probability. Adv Ther 30, 487–502 (2013). https://doi.org/10.1007/s12325-013-0028-1
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DOI: https://doi.org/10.1007/s12325-013-0028-1