What Determines How Long a Dental Bridge Lasts
A dental bridge replaces one or more missing teeth by anchoring an artificial tooth (called a pontic) to the teeth on either side of the gap or to dental implants. How long your bridge lasts depends on several factors: the type of bridge, the health of the supporting teeth or implants, the materials used, your bite forces, and your daily oral hygiene.
No dental restoration lasts forever. But with the right type of bridge for your situation and consistent care, many bridges significantly exceed their average lifespan. Some traditional bridges remain functional for 20 years or more. The key is understanding what shortens a bridge's life so you can avoid those factors.
Average Dental Bridge Lifespan by Type
Different types of dental bridges have different expected lifespans based on their design and how they attach to the supporting structures.
Traditional Fixed Bridge (10 to 15 Years)
A traditional bridge uses crowns cemented onto the natural teeth on either side of the gap (called abutment teeth) to support the replacement tooth in the middle. This is the most common type of dental bridge.
Research published in the Journal of Prosthetic Dentistry and Clinical Oral Investigations reports average survival rates of 10 to 15 years for traditional fixed bridges. Some studies report 10-year survival rates above 90%. The primary reasons for failure are decay in the abutment teeth, loss of cement, and fracture of the porcelain or framework.
Maryland Bridge (5 to 10 Years)
A Maryland bridge, also called a resin-bonded bridge, uses thin metal or ceramic wings bonded to the back of the adjacent teeth instead of full crowns. This design preserves more of the natural tooth structure, which is an advantage. However, the adhesive bond is weaker than a full crown, which means Maryland bridges have a higher rate of debonding.
Studies show Maryland bridges have an average lifespan of 5 to 10 years. They are most commonly used to replace a single front tooth where bite forces are lower. In the back of the mouth, where chewing forces are stronger, Maryland bridges are less predictable.
Implant-Supported Bridge (15 to 20 Years or More)
An implant-supported bridge anchors to dental implants rather than natural teeth. Because implants are made of titanium and integrate directly with the jawbone, they provide a stable, independent foundation that does not depend on the health of adjacent teeth.
Research on implant-supported bridges reports survival rates above 95% at 10 years. Many implant-supported bridges last 15 to 20 years or longer. The implants themselves can last a lifetime, though the bridge (the prosthetic portion on top) may eventually need to be replaced due to wear or material fatigue.
Cantilever Bridge (8 to 12 Years)
A cantilever bridge anchors to a natural tooth on only one side of the gap, rather than both sides. This design is used when there is only one suitable abutment tooth available. Because all of the chewing force is concentrated on a single supporting tooth, cantilever bridges tend to have shorter lifespans and higher rates of abutment tooth complications.
Average survival for cantilever bridges is roughly 8 to 12 years, though results vary depending on the location in the mouth and the forces applied to the bridge.
What Shortens a Dental Bridge's Lifespan
Several factors can cause a dental bridge to fail earlier than expected. Most of these are preventable or manageable with proper care and regular dental visits.
Decay in the Abutment Teeth
The most common reason traditional bridges fail is decay in the teeth supporting the bridge. The junction where the crown meets the natural tooth is vulnerable to bacterial infiltration, especially if oral hygiene is poor. Once decay develops under a bridge crown, the bridge may need to be removed, the decay treated, and a new bridge fabricated.
Cement Washout or Failure
Over time, the dental cement holding the bridge to the abutment teeth can break down. This allows the bridge to loosen, which creates a gap where bacteria enter and cause decay. If caught early, the bridge can sometimes be re-cemented. If decay has already started under the loose crown, more extensive treatment is needed.
Teeth Grinding and Heavy Bite Forces
Patients who grind or clench their teeth (bruxism) place excessive force on their bridges, which can fracture the porcelain, crack the framework, or damage the abutment teeth. A custom nightguard can reduce this stress significantly. If you grind your teeth, tell your prosthodontist so the bridge can be designed with stronger materials and your bite can be adjusted to distribute forces evenly.
Inadequate Cleaning Under the Bridge
The underside of a bridge, where the pontic sits over the gum tissue, traps food and bacteria. If this area is not cleaned daily, gum inflammation and decay in the abutment teeth will follow. Many patients do not realize that regular flossing cannot clean under a bridge. You need a floss threader, interdental brush, or water flosser to access this area.
How to Make Your Dental Bridge Last Longer
The habits you maintain at home and the frequency of your dental visits have the greatest impact on how long your bridge lasts.
Brush twice daily with a soft-bristle toothbrush, paying extra attention to the gumline around the bridge crowns. Clean under the bridge every day using a floss threader, super floss, or a water flosser. These tools reach the space between the pontic and the gum tissue that a regular toothbrush cannot access.
See your dentist or prosthodontist for checkups and professional cleanings at least twice a year. Your provider will check the bridge for looseness, examine the abutment teeth for decay, and evaluate the gum health around the bridge. Early detection of problems allows for simpler, less costly repairs.
If you grind your teeth, wear a nightguard. Avoid using your bridge to bite into very hard foods like ice, hard candy, or bone. These habits crack porcelain and stress the framework.
Signs Your Dental Bridge May Be Failing
Knowing the warning signs of bridge failure allows you to seek treatment before the bridge is lost entirely. Contact your dentist or prosthodontist if you notice any of the following.
- The bridge feels loose or rocks when you chew or push on it with your tongue
- You feel a gap between the bridge crown and the gum where food gets trapped more easily than before
- Persistent bad taste or bad breath coming from the bridge area, which may indicate decay or infection underneath
- Sensitivity or pain in the teeth supporting the bridge
- A visible crack or chip in the bridge material
- The bridge feels different when you bite down, as if your bite has shifted
- Gum swelling, redness, or bleeding around the bridge
When to Replace a Dental Bridge
A bridge does not need to be replaced at a specific age. If it fits well, the abutment teeth are healthy, and the gums are in good condition, a bridge can continue to function well beyond its average lifespan. Replacement is needed when the bridge is loose and cannot be re-cemented, when decay has compromised the supporting teeth, when the framework is fractured, or when gum recession has created visible gaps between the bridge and the gumline.
When it is time for a replacement, your prosthodontist will evaluate whether the abutment teeth can support a new bridge or whether a different approach, such as an implant-supported bridge, would be more appropriate given the current condition of the teeth and bone.
When to See a Prosthodontist
A general dentist can place and maintain dental bridges in many situations. However, a prosthodontist offers advanced expertise for complex cases, including bridges that span multiple teeth, cases where the abutment teeth have been previously treated, or situations where the bite needs to be carefully managed.
A prosthodontist is a dentist who has completed an additional three years of residency training focused on restoring and replacing teeth. If your bridge has failed, if you are considering an implant-supported bridge, or if you want a specialist evaluation of your current bridge, a prosthodontist is the right provider to see.
Find a Prosthodontist Near You
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