By Dr. Manish Pandey, BDS, Dental Surgeon
Medication-related osteonecrosis of the jaw (MRONJ) is an uncommon but potentially serious complication associated with certain medicines used for osteoporosis, cancer-related bone disease and some other conditions. Most people taking these medicines do not develop MRONJ. The safest approach is to share a complete medication history, keep dental disease under control and coordinate invasive treatment with the prescribing clinician when necessary.
MRONJ is a condition in which an area of jawbone becomes exposed—or can be reached through an opening in the gum—and does not heal normally. The formal diagnosis also requires a relevant medicine history and exclusion of other causes, including previous radiation treatment to the jaws. A dentist or oral and maxillofacial specialist must make the diagnosis; a painful socket or a small mouth ulcer is not automatically MRONJ.
Which medicines are associated with MRONJ?
The best-known medicines are antiresorptive drugs. These include bisphosphonates such as alendronate and zoledronic acid, and the RANKL inhibitor denosumab. Romosozumab and some antiangiogenic or targeted cancer medicines have also been associated with MRONJ.
Risk is not the same for every patient. It is generally higher with the larger and more frequent doses used for cancer-related indications than with standard osteoporosis treatment. Duration, dental infection, periodontal disease, dentures, smoking, diabetes, corticosteroids and the extent of any proposed surgery may also affect risk. The benefit of osteoporosis or cancer treatment often greatly outweighs the jaw risk, so do not stop or delay prescribed medicine on your own.
What are the early signs?
Some people have no symptoms at first. Possible signs that deserve dental assessment include:
- exposed bone or a rough, hard area that does not heal;
- a gum opening that drains or allows bone to be felt;
- persistent pain, swelling, redness or pus;
- a loose tooth without an obvious cause;
- numbness, tingling or an altered sensation in the jaw;
- a denture sore that repeatedly breaks down; or
- an extraction site that remains open or painful beyond the expected recovery period.
These findings can also result from an ordinary dental infection, trauma or another oral condition. Prompt examination matters more than trying to identify the cause at home.
What should you do before starting the medicine?
If the medical schedule allows, arrange a dental examination before higher-risk antiresorptive or antiangiogenic treatment begins. The aim is to identify active infection, untreated decay, severe gum disease, ill-fitting dentures and teeth with a poor prognosis. Necessary care can then be planned with the medical team.
Dental optimisation can often occur without delaying essential treatment. Bring the exact medicine name, dose, route, reason for treatment and start date. Tell the dentist about cancer therapy, corticosteroids, diabetes, smoking and previous radiotherapy. A vague statement such as “I take a bone tablet” may not provide enough information.
How can the risk be reduced during treatment?
- Brush twice daily with fluoride toothpaste and a soft toothbrush.
- Clean between the teeth with floss or an appropriately sized interdental cleaner.
- Attend recalls based on your individual dental and medical risk.
- Have sore or unstable dentures adjusted instead of tolerating repeated rubbing.
- Seek care early for decay, a gum boil or dental abscess, bleeding gums or a loose tooth.
- Avoid smoking and keep diabetes controlled with your healthcare team.
The American Dental Association notes that sound oral hygiene and regular dental care may be the most useful general approach to lowering risk. Prevention cannot remove the risk completely, but controlling infection may reduce the chance that urgent surgery becomes necessary.
Can you have an extraction or implant?
Being prescribed an antiresorptive medicine does not automatically prevent routine dentistry. Fillings, non-surgical gum care and root-canal treatment can often proceed normally. If extraction, implant placement or another bone-invasive procedure is being considered, the dentist should assess the medicine, indication, duration, other health factors, infection and available alternatives.
When a restorable tooth has pulp or root infection, root-canal treatment may sometimes avoid extraction. If surgery is necessary, the treating dentist or surgeon may use a conservative technique and arrange closer review. Follow the personalised instructions rather than generic online extraction advice; our broader tooth-extraction aftercare guide does not replace an MRONJ-specific plan.
Should the medicine be paused for dental work?
Do not create your own “drug holiday.” Whether a dose should be changed or delayed is a medical decision that depends on the medicine and why it was prescribed. Evidence for routine interruption is limited, and stopping denosumab or another treatment can carry important risks. The dentist and prescriber should make the decision together when a change is being considered.
Blood tests such as serum CTX cannot reliably predict who will develop MRONJ and should not be treated as a simple clearance test.
When should you seek urgent help?
Contact a dentist promptly for exposed bone, a non-healing socket, pus, worsening pain, swelling, numbness or a loose tooth. Seek emergency medical care for rapidly increasing facial or neck swelling, difficulty breathing or swallowing, uncontrolled bleeding, confusion or severe illness.
Frequently asked questions
How common is MRONJ with osteoporosis medicine?
It is rare at standard osteoporosis doses. Risk is higher with cancer-related regimens, but exact estimates vary by medicine, dose, treatment duration and the population studied.
Does every area of exposed jawbone mean MRONJ?
No. Trauma, infection, healing problems and other diseases can look similar. Diagnosis requires clinical assessment and the correct history.
Can MRONJ occur without a tooth extraction?
Yes. Extractions and other bone-invasive procedures are recognised triggers, but MRONJ can develop without a recent dental procedure.
Should I refuse osteoporosis treatment because of MRONJ?
No. Fractures can cause major disability and serious complications, while MRONJ remains uncommon at osteoporosis doses. Discuss your personal benefits and risks with the prescriber and dentist.
Key takeaway
Medication-related osteonecrosis of the jaw is uncommon, and fear should not lead you to stop important treatment. Give every dentist an accurate medication history, control dental infection early, maintain daily oral hygiene and let the dental and medical teams coordinate any invasive procedure.
References
- American Dental Association: Osteoporosis Medications and Medication-Related Osteonecrosis of the Jaw
- American Association of Oral and Maxillofacial Surgeons: MRONJ Position Paper—2022 Update
- Scottish Dental Clinical Effectiveness Programme: MRONJ Guidance
- Systematic review of antiresorptive discontinuation around dental procedures
Dental disclaimer: This article provides general education and cannot diagnose MRONJ or replace advice from your dentist, oral surgeon, oncologist or osteoporosis clinician. Do not stop, delay or alter prescribed medicine without the treating clinician.