Dental implants have a very high success rate — often over 95%. But in rare cases, the body doesn’t accept the implant, or healing doesn’t go as planned. This is sometimes called implant failure or rejection.
While it’s uncommon, it’s important to recognize the early signs so your dentist can step in quickly to protect your oral health and, in some cases, save the implant.
Here’s what implant rejection looks like, why it can happen, and what to do if you’re concerned.
🦷 What Does “Implant Rejection” Really Mean?
Unlike organ transplants, dental implants aren’t rejected due to immune response. However, the term “implant rejection” is often used to describe:
- The body not integrating the implant into the bone
- Bone loss or instability around the implant
- Infection that prevents proper healing
This typically happens during the early healing phase, within the first few months after placement.
⚠️ Common Signs of Implant Failure or Rejection
While some soreness is normal in the first few days, persistent or worsening symptoms may signal a problem. Watch for:
- ❗ 1. Persistent Pain or Discomfort – Mild soreness is expected, but if you feel sharp, worsening pain after the first week, it could indicate infection or implant instability.
- ❗ 2. Swelling That Doesn’t Go Down – Some swelling is normal after surgery, but it should gradually improve. Ongoing or increasing swelling may signal a problem.
- ❗ 3. Red or Inflamed Gums – Gums around the implant should be pink and healthy. If they’re red, puffy, or bleeding, it may be a sign of peri-implantitis — a gum infection that can lead to bone loss.
- ❗ 4. Loosening of the Implant – An implant should feel just like a natural tooth — stable and unmoving. If it wobbles, shifts, or feels “off,” it could mean the implant hasn’t fused properly with the bone.
- ❗ 5. Pus or Bad Taste – Discharge, a foul taste, or odour from the implant site could mean there’s an infection that needs prompt treatment.
- ❗ 6. Difficulty Chewing or Biting – If the implant feels uncomfortable or painful when chewing — especially after healing should be complete — it may not be integrating correctly.
⏳ When Do Signs of Rejection Appear?
Early rejection: Within the first 3–6 months
Late failure: Can happen years later, often due to gum disease or biting stress
The earlier the issue is caught, the better the chances of saving the implant or preventing further damage.
🩺 What Causes Implant Failure?
Possible causes include:
- Poor bone quality or insufficient bone
- Infection at the implant site
- Smoking (which reduces blood flow and healing)
- Uncontrolled diabetes or medical conditions
- Teeth grinding (bruxism)
- Poor oral hygiene after surgery
- Allergic reaction (rare, but possible with titanium in sensitive patients)
Your dentist will assess all these factors before treatment to minimize risk.
🛠 What Happens If an Implant Fails?
If your implant doesn’t integrate properly, your dentist may:
- Remove the implant
- Clean and disinfect the site
- Let the area heal
- Consider bone grafting or a new implant later
In some cases, a replacement can be placed after healing — often with even better results, thanks to modern materials and improved planning.
✅ How to Reduce the Risk of Implant Rejection
- Follow all aftercare instructions closely
- Brush and floss around the implant daily
- Avoid smoking and limit alcohol during healing
- Keep up with regular dental check-ups
- Let your dentist know about any discomfort or concerns right away
Final Thoughts
Implant rejection is rare, but it’s important to know what to look for. The earlier any issues are caught, the easier they are to treat — and the better the chance of a successful outcome.
Concerned about your dental implant? We’re here to help.
Our experienced team is committed to your comfort and long-term success. If you’re noticing discomfort or have questions about your healing, book a follow-up appointment today — we’re here to support you every step of the way.