Bisphosphonates are associated with increased risk for jaw surgery in medical claims data: is it osteonecrosis?

PURPOSE: Bisphosphonates (BPs) have recently been associated with increased risk of osteonecrosis of the jaw. Using a large automated insurance database, we searched the medical claims for common procedure codes (CPT codes) denoting major surgery to the mandible or the maxilla. The primary aim of this pilot study was to alert readers to clinically relevant but preliminary information regarding the risk of jaw surgery among patients who received BPs, as compared with patients who did not.

METHODS

The study utilized 2001-2004 claims data from a large nationwide medical insurer. Medical claims from 255,757 cancer patients with breast, lung, or prostate malignancies, or multiple myeloma were analyzed for CPT codes 21015, 21025, 21026, 21034, 21040, 21045, 21046, and 21047.

RESULTS

We identified 224 cases of jaw surgery; of those, 39 cases were found among 26,288 BP users and 185 cases were found among 229,469 never-users. The odds ratio of jaw surgery for intravenous BP users was 4.24 (P<.05). Breast cancer patients experienced a 6-fold increase in risk as compared with nonusers. A trend of increased risk was noted for those on orally administered BPs, but the association was not significant.

CONCLUSION

A significant association was noted between the administration of IV BPs and oral surgery in cancer patients. More studies are needed to understand the role of BPs in bone biology and necrosis along with the associated biologic pathways.