Osteoporosis, Bisphosphonates, and Dental Work: What You Must Know

You have osteoporosis. Your doctor prescribed a bisphosphonate (Fosamax, Actonel, Boniva, Prolia, or similar) to strengthen your bones. Smart move for your hip and spine. But then your dentist mentions a needed tooth extraction, and suddenly they're worried about something called "osteonecrosis of the jaw."

What is osteonecrosis? How common is it really? And should you skip the dental work?

The answers are more nuanced than fear-based internet searches suggest.

What Are Bisphosphonates?

Bisphosphonates are medications that slow bone loss. They work by inhibiting osteoclasts (cells that break down bone). The result: denser bones, fewer fractures. They're one of the most effective osteoporosis treatments available.

Common bisphosphonates: - Alendronate (Fosamax) - Risedronate (Actonel) - Ibandronate (Boniva) - Zoledronic acid (Reclast) - IV formulation - Denosumab (Prolia) - similar mechanism, different class

They're highly effective. But they have a rare, serious complication in the jaw.

Osteonecrosis of the Jaw (ONJ): What It Really Is

Osteonecrosis means "bone death." In ONJ, part of your jaw bone dies and becomes exposed. It usually starts after dental work (extraction, implant, or major procedure) but can occur spontaneously.

What it looks like: - Exposed bone visible in the mouth - Pain and swelling - Foul odor or discharge - Difficulty healing after dental work - Teeth becoming loose

What it feels like: - Significant pain - Swelling of jaw - Difficulty eating or swallowing - Numbness

Why it happens: - Bisphosphonates suppress bone turnover so much that bone can't repair itself - When you have dental work, bone is stressed - If the bone can't repair, it dies - Dead bone is exposed and becomes infected

How Common Is ONJ Really?

This is where fear meets reality:

Oral surgery (extractions, implants): 1 in 100 to 1 in 1000 patients on long-term bisphosphonates develop ONJ

IV bisphosphonates (Reclast, used for osteoporosis): ~0.1% risk per year of treatment

Spontaneous ONJ (without dental work): Very rare (~0.01% per year)

Context: If you have been on oral bisphosphonates for 5 years and have dental work, your ONJ risk is somewhere between 0.5-5%. This isn't zero. It's not negligible. But it's not "definitely going to happen."

For comparison: your lifetime risk of a serious car accident is ~10%; your lifetime risk of dying in a car accident is ~1%.

Risk Factors for ONJ

Not everyone on bisphosphonates develops ONJ. Higher-risk factors:

If you have none of these factors, your ONJ risk is very low. If you have multiple factors, your risk increases.

Dental Work and Bisphosphonates: The Strategy

Before Any Dental Work

1. Tell your dentist about your bisphosphonate: How long, what dose, IV or oral, when you started
2. Get optimization: Before extractions or implants, optimize your oral health
3. Professional cleaning
4. Treatment of cavities
5. Gum disease treatment

6. Extract any hopeless teeth

7. Consider a "drug holiday": Some dentists recommend stopping your bisphosphonate before dental work

8. Oral bisphosphonates: Usually stop 3 months before and resume 3 months after
9. IV bisphosphonates: Can't stop (too long-acting), but work with your doctor

10. This reduces ONJ risk but increases osteoporosis fracture risk

11. Get imaging: X-rays or CT to assess bone quality and quantity

12. Discuss the plan: What's being done? Can it wait? Is extraction necessary?

For Routine Work (Cleaning, Filling)

These are safe. Your dentist won't worry about ONJ. Just maintain excellent oral hygiene.

For Gum Disease Treatment (Scaling, Root Planing)

Generally safe. But tell your dentist about your bisphosphonate.

For Tooth Extraction

This is the high-risk procedure. Here's the strategy:

Gentle extraction technique: - Elevate teeth minimally (less bone trauma) - Avoid forceful extraction - Minimize bone disruption - Close the site carefully

Antibiotics: - Prophylactic antibiotics before and after (reduces infection risk) - May continue longer than normal

Healing support: - Chlorhexidine rinse to prevent infection - Avoid disturbing the site - Careful follow-up - May take longer to heal than normal

Single vs. multiple extractions: - Single extraction: Can do safely - Multiple extractions: Might need to space them out (do a few, wait 3 months, do more)

For Dental Implants

This is the real challenge. Implants require: 1. Extraction (traumatic to bone) 2. Bone integration of the implant (osseointegration) 3. Months of healing

Bisphosphonates interfere with osseointegration. Your options:

Option A: Drug holiday + implant - Stop bisphosphonate 3 months before extraction - Do extraction - Let bone heal - Place implant - Resume bisphosphonate after 3 months - This increases ONJ risk (lower) but increases fracture risk (during holiday) - Requires coordination with your doctor

Option B: Implant despite bisphosphonate - Proceed with implant while on medication - Higher ONJ risk, but some dentists report success - Requires exceptional oral hygiene and careful monitoring

Option C: No implant, bridge or denture instead - Avoids the problem entirely - No ONJ risk - But requires different restoration

Talk to your dentist and doctor about which option makes sense for you.

Drug Holiday Decision-Making

If you're considering stopping your bisphosphonate:

Factors favoring a drug holiday: - Young age (lower fracture risk) - Short duration on drug (<5 years) - Multiple extractions or implants needed - High ONJ risk factors

Factors against drug holiday: - Severe osteoporosis - Previous fractures - Long duration on drug - Age >70 - Taking other medications (like corticosteroids) that affect bone

This requires a conversation between you, your dentist, and your doctor (rheumatologist or endocrinologist). It's a genuine risk-benefit discussion.

Prevention: The Best Strategy

Best way to avoid ONJ complications: prevent the dental problems in the first place.

1. Excellent oral hygiene: Brush twice daily, floss daily
2. Regular cleanings: Every 6 months
3. Avoid problematic teeth: If a tooth is headed for extraction, fix it now (fill, root canal) before it becomes critical
4. Gum disease treatment: Prevent/treat periodontitis aggressively
5. Avoid smoking: Huge risk factor for both ONJ and dental disease

Prevention is infinitely better than managing ONJ.

If ONJ Develops

If you start having symptoms (exposed bone, persistent pain, swelling after dental work):

1. See your dentist immediately: Don't wait
2. Your dentist will likely refer to a specialist: Oral surgeon or periodontist familiar with ONJ
3. Management options:
4. Careful monitoring (some cases resolve spontaneously)
5. Chlorhexidine rinses to prevent infection
6. Antibiotics if infection develops
7. Possible surgical debridement of dead bone
8. Possible hyperbaric oxygen therapy (unproven but used)

ONJ is serious but manageable. Early recognition and treatment improve outcomes.

The Honest Conversation

Here's what you need to know:

Can you have dental work on bisphosphonates? Yes, mostly safely.

Should you avoid needed dental work? No. Untreated dental disease is riskier than dental work.

Should you stop your bisphosphonate? Maybe, but only after discussion with your doctor about fracture risk.

Is ONJ a dealbreaker? No. It's a real risk, but manageable risk.

Can you have implants? Possibly, but might require drug holiday or alternative restoration.

Questions for Your Doctor

• "How long have I been on this bisphosphonate?"
• "Is a drug holiday feasible for me if I need dental work?"
• "What's my fracture risk if we stop the medication?"
• "Should I tell my dentist anything else about my osteoporosis?"

Questions for Your Dentist

• "Given my bisphosphonate use, what dental work do I need?"
• "What's your ONJ risk assessment for me?"
• "Should I get a drug holiday before work?"
• "How will you minimize my ONJ risk?"
• "What's your postoperative protocol?"

The Bottom Line

Bisphosphonates are excellent osteoporosis drugs. ONJ is a real but manageable complication. You can have dental work safely if you:

1. Tell your dentist about the medication
2. Maintain excellent oral hygiene (to prevent disease)
3. Plan any major dental work carefully
4. Work with your doctor on drug holiday if appropriate
5. Understand the risks and benefits

Don't avoid needed dental care out of fear. But do communicate with your healthcare team and plan carefully.

Your bones are stronger. Your teeth deserve the same vigilance.