Dental Bridge Problems: Failure Signs, Repair Costs, and When to Replace
Updated 16 April 2026
Dental bridges do not last forever. Understanding what can go wrong, what repairs cost, and when replacement is necessary helps you budget for the full lifecycle cost and catch problems early when they are cheaper to fix.
Bridge Lifespan and Survival Rates
| Bridge Type | 5-Year Survival | 10-Year Survival | 15-Year Survival |
|---|---|---|---|
| Traditional (PFM) | 93-96% | 85-90% | 75-80% |
| Traditional (Zirconia) | 95-98% | 90-95% | 80-90% |
| Cantilever | 85-90% | 70-80% | 55-65% |
| Maryland | 80-87% | 60-70% | N/A (usually replaced) |
| Implant-Supported | 97-99% | 95-97% | 90-95% |
Survival rates represent the percentage of bridges still functioning at each timepoint. "Functioning" means the bridge has not needed replacement, though minor repairs may have been performed. These figures come from clinical studies published in dental journals.
Common Problems and Repair Costs
Cement washout (bridge loosening)
Most common issue
Over time, the dental cement holding the bridge can dissolve or wash out, causing the bridge to feel loose or wobbly. If caught early, the bridge can be cleaned and re-cemented at minimal cost. If ignored, bacteria enter under the loose crown and cause decay, turning a $200 repair into a $2,500+ replacement.
What to do: See your dentist immediately if the bridge feels loose or you taste a bad flavour.
Decay under anchor crowns
15-20% of bridges within 10 years
Decay can develop where the crown meets the natural tooth, especially if cement has washed out or oral hygiene is inadequate. Small decay can sometimes be treated with a filling, but if it reaches the nerve, a root canal ($700-$1,200) is needed. If the decay is too extensive, the anchor tooth may be lost, requiring full bridge replacement.
What to do: Prevent with thorough daily cleaning under the bridge and regular professional cleanings.
Porcelain chipping or fracture
5-10% of bridges within 10 years
The porcelain layer on PFM or all-ceramic bridges can chip. Small chips can be smoothed or repaired with composite resin ($150-$300). If the chip exposes the metal substructure or compromises the bridge structure, full replacement may be needed. Zirconia bridges rarely chip due to their superior strength.
What to do: Avoid biting hard objects (ice, bones, pens) and wear a night guard if you grind your teeth.
Gum recession around anchor teeth
Gradual, affects most bridges over time
Gums naturally recede with age, exposing the edge of the crown where it meets the natural tooth. On PFM bridges, this exposes the dark metal margin, creating an unsightly grey line. On all-ceramic or zirconia bridges, the transition is less noticeable. Gum recession itself does not require bridge replacement, but it increases the risk of decay at the exposed margin.
What to do: Maintain good gum health with gentle brushing and regular dental visits.
Abutment tooth failure
10-15% within 15 years
The anchor tooth can fracture, develop root damage, or lose too much bone support to hold the bridge. When an anchor tooth fails, the entire bridge must be removed and replaced. This is the most expensive bridge complication because it often requires extraction ($150-$400), bone grafting ($300-$800), and either a new, larger bridge or an implant.
What to do: Regular X-rays monitor anchor tooth health. Report any pain or sensitivity immediately.
Repair vs Replace: Decision Guide
Repair is viable ($100-$600)
- Bridge has come loose but structure is intact (re-cementation)
- Small porcelain chip that does not affect function
- Minor sensitivity on anchor teeth (bite adjustment)
- Bridge is less than 5 years old and well-made
Replacement is needed ($2,000-$5,000)
- Anchor tooth has decay that cannot be treated without removing the bridge
- Bridge framework (metal or zirconia) is cracked or fractured
- Anchor tooth has fractured or been extracted
- Bridge is 10+ years old with multiple repairs
- Poor fit causing chronic gum inflammation
Insurance typically covers bridge replacement if the original bridge is 5+ years old. Most plans treat it as a new major restorative procedure covered at 50%. If your bridge needs replacement before 5 years, check if the original dentist offers any warranty coverage.
When to Switch to an Implant
After multiple bridge failures or replacements, switching to a dental implant may be the smarter long-term investment. Consider the switch if:
- You have already replaced the bridge once and it is failing again
- An anchor tooth has been lost, requiring a larger or redesigned bridge
- Bone loss under the bridge has progressed and will continue
- The total spent on bridge repairs and replacements approaches implant cost
- You are under 60 and facing decades of future tooth replacement needs
See the full bridge vs implant comparison for 10-year and 20-year cost analysis.