A Maryland bridge is a type of dental bridge that replaces a missing tooth by bonding thin wings to the back of your neighboring teeth, rather than covering those teeth with crowns. It’s one of the most conservative ways to fill a gap in your smile because it preserves nearly all of your natural tooth structure. You’ll also hear it called a resin-bonded bridge.
How a Maryland Bridge Works
A traditional bridge requires your dentist to grind down the teeth on either side of the gap and cap them with crowns to anchor the replacement tooth. A Maryland bridge skips that step entirely. Instead, it uses thin metal or ceramic wings that attach to the back surfaces of your neighboring teeth. The replacement tooth (called a pontic) sits in the gap, and the wings hold it in place. From the front, only the replacement tooth is visible.
The wings are bonded using a resin cement after both the tooth surface and the wing are lightly etched with acid. This creates a microscopic texture on both surfaces so the cement locks into tiny grooves, forming a strong mechanical grip. The preparation stays within your enamel layer, and in many cases, no drilling of the neighboring teeth is needed at all. Research published in the British Dental Journal notes that more extensive preparation actually leads to reduced survival of the bridge, so the trend has moved toward minimal or no tooth reduction.
Who It’s Best For
Maryland bridges work best when you’re missing a single tooth in the front of your mouth, the teeth on either side are healthy and intact, and those neighboring teeth have enough surface area for the wings to grip. They’re a particularly popular choice for adolescents and young adults who lose a front tooth but whose jaws are still growing, making dental implants inappropriate until growth is complete. In these cases, the Maryland bridge serves as a reliable interim solution, sometimes lasting years, until a permanent option becomes viable.
They’re less ideal for back teeth, where chewing forces are significantly higher. Debonding rates for bridges placed on posterior teeth run about 5% per year, compared to roughly 3% per year for bridges in the front of the mouth. If you grind your teeth, have a deep bite, or the neighboring teeth already have large fillings (meaning less intact enamel for bonding), your dentist may steer you toward a different option.
What the Procedure Looks Like
Getting a Maryland bridge is one of the simpler restorative procedures in dentistry. Your dentist prepares the back surfaces of the neighboring teeth, though “preparation” here is minimal. It typically involves light roughening of the enamel rather than significant drilling. An impression or digital scan of your teeth is taken and sent to a lab, where the bridge is custom-fabricated.
At your second appointment, the dentist tries in the bridge, checks the fit and your bite, then bonds it permanently. The tooth and wing surfaces are etched with phosphoric acid, a bonding agent is applied, and resin cement locks everything together. The cement is hardened with a curing light. The whole process usually requires just two visits, and because there’s little to no drilling, you may not even need local anesthesia.
Materials: Metal Wings vs. Ceramic
The original Maryland bridges used metal alloy wings, which are strong and thin but can sometimes create a grayish shadow that shows through the neighboring teeth. This is more noticeable on people with thinner or more translucent enamel. Newer versions use zirconia or glass-ceramic frameworks instead. Zirconia is highly translucent and mimics natural tooth appearance, making it the preferred material when aesthetics matter, especially for front teeth.
The material choice also affects longevity. A review in the European Journal of Dentistry found that glass-ceramic Maryland bridges had a 100% success rate at five years, while zirconia versions came in at about 88%. Metal-framed bridges sat at roughly 86%. At the ten-year mark, one research group reported zirconia bridges surviving at 98.2%, and another found 100% survival in a smaller group of ten zirconia bridges followed for a decade. These numbers suggest that newer ceramic materials perform at least as well as metal, with better cosmetic results.
How Long They Last
A meta-analysis of 17 studies found that Maryland bridges have an overall five-year survival rate of about 88%. That’s solid, though lower than traditional bridges or implants. The most common reason they fail isn’t fracture. It’s debonding: the wing simply comes unglued. This happened in about 19% of cases over five years across the studies reviewed.
The good news is that debonding isn’t a catastrophe. The bridge usually pops off intact, and your dentist can often re-bond it in a single appointment. Your natural teeth underneath are unharmed because so little (or no) enamel was removed in the first place. This is one of the key advantages of the Maryland bridge: failure is low-stakes compared to a traditional bridge, where the crowned teeth can develop decay or sensitivity over time.
Design matters too. Bridges with a single wing on one side (cantilever design) actually outperform the traditional two-wing version, with a five-year success rate of about 92% versus 85% for two-wing designs. This seems counterintuitive, but a single-wing bridge allows slight natural movement of each neighboring tooth independently, reducing stress on the bond.
Maryland Bridge vs. Traditional Bridge vs. Implant
- Tooth preservation: A Maryland bridge removes little to no enamel. A traditional bridge requires grinding down two healthy teeth to stumps for crowns. An implant doesn’t touch neighboring teeth at all.
- Invasiveness: Maryland bridges involve no surgery. Implants require a surgical procedure and months of healing while the implant fuses with your jawbone. Traditional bridges need significant drilling but no surgery.
- Durability: Implants last the longest, often decades. Traditional bridges typically last 10 to 15 years. Maryland bridges are reliable for 5 to 10 years or more, depending on material and location.
- Cost: Maryland bridges generally cost less than implants and are comparable to or slightly less than traditional bridges, since the lab work and preparation are simpler.
- Reversibility: A Maryland bridge is essentially reversible. If it debonds or you decide on an implant later, your natural teeth are still intact. A traditional bridge is not reversible, because the neighboring teeth have been permanently reshaped.
Potential Complications
Debonding is by far the most common issue, accounting for the vast majority of complications. Biological problems are uncommon: cavities developed on the supporting teeth in only about 1.5% of cases over five years, and gum disease led to bridge loss in about 2% of cases. These rates are low, partly because the edges of a Maryland bridge sit in areas that are relatively easy to keep clean.
One cosmetic concern with metal-winged bridges is the shadow effect mentioned earlier. If the metal shows through thin enamel, it can make the neighboring tooth look slightly darker. Switching to a ceramic framework eliminates this. Fracture of the replacement tooth itself is possible but rare with modern materials, particularly zirconia, which resists chipping and cracking well under normal biting forces.