Fragility fractures and delayed wound healing after tooth extraction in Japanese older adults

Introduction Fragility fractures can cause delayed wound healing after tooth extraction, which contributes to an increased risk of osteomyelitis of the jaw. We evaluated whether a history of fragility fracture was associated with increased risk of delayed wound healing after tooth extraction in older adults in Japan. Materials and methods Of 5352 people aged 50–89 years in the 2014 basic resident registry of the town of Obuse, the present study included 376 subjects (190 men and 186 women) who completed a structured questionnaire and measurement of the bone mineral densities (BMDs) of the bilateral femoral neck. Delayed wound healing after tooth extraction was self-reported. Fragility fractures were confirmed via examination of hospital medical records. Logistic regression analyses adjusted for age and gender were used to evaluate association of clinical variables with delayed would healing after tooth extractions. Odds ratios (ORs) and the 95% confidence intervals (CIs) of all possible associated variables for the presence of delayed wound healing were calculated. Results Subjects with a history of fragility fractures had a significantly higher risk of delayed wound healing compared with those without previous fragility fractures (OR 2.68; 95% CI 1.11–6.46, p = 0.028). This association still remained after adjusted for all other variables (OR 2.70; 95% CI 1.10–6.60, p = 0.030). Delayed wound healing was not significantly associated with the BMD of the femoral neck. Conclusions History of fragility fracture may be associated with increased risk of delayed wound healing after tooth extraction in Japanese men and women aged 50–89 years.