Objectives: To evaluate the association between clinical measures of periodontal disease and skeletal bone mineral density (BMD) in a cohort of men 65 years and older.
Methods: Study participants were recruited from the 1,976 men enrolled in the Osteoporotic Fractures in Men (MrOS) Study at two of the study's six clinical centers, Portland and Birmingham. MrOS is a longitudinal study of risk factors for fractures in older men. Dental measures included clinical attachment loss (CAL), pocket depth (PD), calculus, plaque, and bleeding for a random half-mouth (6 sites/tooth). BMD was measured at the hip, spine, and whole-body using dual-energy x-ray absorptiometry. Information on medical and lifestyle factors known to be associated with osteoporosis and periodontitis were obtained through questionnaires, interviews, and clinical assessments.
Results: Among the 1,327 men who agreed to participate, 137 (10%) were edentulous and 1,210 (90%) were dentate. There was a significant association between dentate status and whole-body BMD (WBBMD). Adjusted mean WBBMD was 1.183 g/cm2 for edentulous and 1.214 g/cm2 for dentate men (p=0.01). Among dentate men, mean number of teeth, CAL and PD were 22.5, 3.02mm and 2.52mm; after controlling for age, pack-years, race, education, body mass index, and calculus there was no association between number of teeth, CAL, PD and any measure of BMD.
Adjusted Mean BMD (g/cm2) | |||||||
Site | Edentulous (n=137) | Dentate (n=1,210) | p-value | Dentate Men by Sites with CAL³5mm | p-value | ||
0 (n=216) | 1-9 (n=651) | 10+ (n=343) | |||||
Lumbar Spine | 1.152 | 1.171 | 0.410 | 1.165 | 1.175 | 1.169 | 0.869 |
Total Hip | 0.944 | 0.950 | 0.644 | 0.952 | 0.948 | 0.946 | 0.802 |
Whole Body | 1.183 | 1.214 | 0.011 | 1.220 | 1.214 | 1.204 | 0.304 |
Conclusion: Among older dentate men, little evidence exists for an association between periodontal status and skeletal BMD. There does, however, appear to be an association between edentulism and whole-body BMD, a relationship which needs further study.
Supported by NIH: UO1-AG18197-02,UO1-AR45580-02,UO1-AR45614,UO1-AR45632,UO1-AR45647,UO1-AR45654,UO1-AR45583,M01-RR00334,R01-DE14386-01.