Jaw osteonecrosis risk (bisphosphonates)

Osteonecrosis of the jaw (ONJ) is a rare condition where an area of jawbone loses its blood supply and fails to heal, sometimes exposing bone in the mouth. It's most often linked to high-dose intravenous bisphosphonates used in cancer care, and much less commonly to the oral or IV forms used for osteoporosis. Dental surgery, especially tooth extractions, is the biggest known trigger.

Doctors think it happens because bisphosphonates slow down bone remodeling so much that the jaw, which constantly repairs itself from chewing and dental work, can't keep up with normal wear and healing after a dental procedure. Poor oral hygiene, gum disease, and smoking also raise the risk. The overall risk for someone taking osteoporosis-dose bisphosphonates is considered low.

If you take a bisphosphonate and need dental work, your dentist and prescribing doctor can coordinate care together; this might include good oral hygiene, treating infections early, and timing elective procedures thoughtfully. Never stop or change a bone medication on your own — this decision should always involve the doctor who prescribed it, weighing your personal fracture risk against the small ONJ risk.