Mandibular cortical bone structure as risk indicator in fractured and non-fractured 80-year-old men and women

Objective To investigate the association between mandibular cortex parameters and fracture in a group of 286 men and women, 79-80 years of age. Study design In a cross-sectional study, the mandibular cortex was evaluated with Klemetti's index for cortical erosion. The cortical thickness was measured with a ruler adjusting for the magnification factor. The odds ratio (OR) for fracture when having a severely eroded cortex or a cortex thickness < 3 mm was calculated. Results A normal cortex was found in 65% of men, whereas only 7% had a severely eroded cortex. The OR for severely eroded cortex as fracture risk predictor was significant (2.32; 95% CI 1.3-4.2), also when the female group was evaluated separately. A significant difference was found between the mean thickness for men (3.96 mm) and women (2.92 mm), respectively. The OR for cortical thickness < 3 mm was significant (2.00; 95% CI 1.1-3.6) in the total group, but not when men and women were evaluated separately. Conclusions Among old women, the cortical parameters were significantly associated with prevalent fracture. In old men, other circumstances may be more important.

Automated summary

In this study, the association between mandibular cortex parameters and fracture risk in older adults was investigated. The findings showed that severely eroded cortex and cortex thickness < 3 mm were significant predictors for fracture risk. The results also indicated differences in cortical parameters between men and women, with significant associations found in older women but not in older men.