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Updated: Oct 19, 2025
Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
Published on: January 31, 2025
Mandibular cortical bone structure as risk indicator in fractured and non-fractured 80-year-old men and women
Grethe Jonasson1,2, Azar Hassani-Nejad3, Magnus Hakeberg4
1Department of Behavioral and Community Dentistry, Institute of Odontology at the Sahlgrenska Academy, University of Gothenburg, Box 450, 405 30, Gothenburg, Sweden. grethe.jonasson@gu.se.
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.
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