What D6930 means

D6930 covers the re-cementation or re-bonding of a fixed partial denture (bridge). "D" is dental, "69" is the fixed prosthodontic services group, and "30" is this re-cement code. A fixed bridge replaces one or more missing teeth by anchoring artificial teeth to crowns on the natural teeth (or implants) on either side of the gap, all cemented in place. Over time, the cement holding the bridge onto its supporting teeth can break down, or the bridge can loosen or come off. If the bridge itself and the supporting teeth are still in good condition, the dentist can clean both and re-cement the existing bridge back into place.

The key is that nothing new is made — the existing bridge is reattached. This is far cheaper and faster than fabricating a new bridge, and it's the right solution when a sound bridge has simply lost its grip. The dentist checks that the bridge fits well and the supporting teeth underneath are healthy (no new decay or fracture) before re-cementing.

A common consideration: if a bridge keeps coming loose, or there's decay or damage on a supporting tooth, re-cementing may not be a lasting fix and a new bridge might be needed. Many plans have a waiting period after a bridge is first placed before they'll separately pay to re-cement it. If your bridge comes loose, see your dentist promptly, as a partially-detached bridge can trap food and risk decay.

When it's typically used

D6930 is reported when an existing fixed bridge that has loosened or come off is cleaned and re-cemented back onto its supporting teeth — when the bridge and the supporting teeth are still in good condition and a new bridge isn't needed.

How much does D6930 cost?

Re-cementing a bridge is a low-to-moderate fee, often roughly 80 to 250 USD depending on region — far cheaper than a new bridge. If a supporting tooth or the bridge turns out to be compromised, a new bridge (a much larger cost) may be needed instead.

Is D6930 covered by insurance?

Often covered under basic/prosthodontic benefits, but many plans won't separately pay re-cementation within a set period after the bridge was first placed (it's considered part of the original service). Repeated re-cementations may prompt consideration of a new bridge. Coverage is generally modest, matching the small fee.

What to do if your bridge comes loose

Having a bridge loosen or come off can be unsettling, but it's a manageable situation if you take the right steps promptly.

If the bridge has come off completely, save it — rinse it gently and keep it safe, since in many cases it can simply be re-cemented. Don't try to glue it back yourself with household adhesives, which can be toxic, set it incorrectly, and complicate a proper re-cementation. If the bridge is loose but still partly attached, be gentle with it, avoid chewing on that side, and keep the area clean. A loose or detached bridge leaves the supporting teeth (which have been prepared and crowned) exposed and can trap food, so it shouldn't be left unaddressed for long. Over-the-counter temporary dental cement can sometimes hold a fully-detached bridge in place briefly if you can't see the dentist right away, but it's only a stopgap.

Contact your dentist to arrange an appointment reasonably promptly. While not usually an emergency unless there's pain, you don't want the supporting teeth exposed for an extended time, as they can be sensitive or develop decay, and the teeth could potentially shift. Bringing the bridge with you (if it came off) lets the dentist assess whether it can be re-cemented (D6930), which is the quick, economical outcome when the bridge and supporting teeth are still sound.

Why bridges come loose

Understanding why a bridge comes loose helps determine whether re-cementing it will be a lasting fix or whether something more is needed.

The most common reason is simply that the cement holding the bridge has worn out or washed out over years of use, allowing it to loosen — in which case the bridge and supporting teeth are often fine and re-cementing works well. But a bridge can also come loose because of problems with a supporting tooth: decay forming at the margin where a crown of the bridge meets a supporting tooth can undermine the bond, or a supporting tooth can fracture or develop a problem. Heavy chewing forces, grinding, or a bridge that never fit perfectly can also contribute.

The cause matters because it determines the fix. If it's just old cement and the supporting teeth are healthy, a simple re-cementation restores the bridge. But if there's decay or damage on a supporting tooth under the bridge, re-cementing alone won't last — the underlying problem must be treated, which sometimes means a new bridge (especially if a supporting tooth is significantly compromised). This is why the dentist examines the bridge and especially the supporting teeth before re-cementing, to make sure they're not just reattaching a bridge over a hidden problem that will cause it to fail again or worsen unseen.

Re-cement vs replace: when a new bridge is needed

When a bridge comes loose, there's a decision between re-cementing the existing one and making a new bridge, and the right choice depends on what the dentist finds.

Re-cementing (D6930) is the ideal, economical outcome when the existing bridge is intact and fits well, and the supporting teeth underneath are healthy and sound — the bridge simply needs to be reattached. A new bridge becomes necessary when there's a fundamental problem that re-cementing can't address: significant decay on a supporting tooth, a fractured supporting tooth or bridge, a bridge that no longer fits well, or a bridge that keeps coming loose repeatedly despite re-cementing (which signals an underlying issue). In those cases, re-cementing would just be a temporary patch over a real problem.

The dentist evaluates both the bridge and the supporting teeth to decide. Sometimes what seems like a simple 'cement it back' turns out to need more once decay or a crack is discovered on a supporting tooth. A new bridge is a much larger undertaking and cost than re-cementation, but it's the right call when the foundation isn't sound, since re-cementing over a compromised supporting tooth would fail and could let problems worsen hidden under the bridge. If a supporting tooth is badly compromised, the situation can become more complex (potentially affecting the whole bridge), which is why an honest assessment of the supporting teeth guides the decision between a quick re-cementation and a new bridge.

Caring for a bridge to prevent problems

Good care of a fixed bridge helps prevent it from coming loose and protects the supporting teeth, extending the life of the bridge.

The supporting teeth (abutments) under a bridge are crowned, but they remain natural teeth vulnerable to decay at the margins where the crowns meet the teeth, especially at and below the gumline. Decay on a supporting tooth is a leading cause of bridge failure, so meticulous oral hygiene is essential: brushing well, and crucially cleaning under the bridge and around the supporting teeth. Because you can't floss between the connected teeth of a bridge normally, special tools are used — a floss threader to pass floss under the bridge, interdental brushes, or a water flosser — to clean the area beneath the artificial tooth (pontic) and around the supporting teeth. This daily under-cleaning protects the supporting teeth from the decay that undermines bridges.

It's also wise to avoid very hard or sticky foods that could loosen or damage the bridge, and to wear a night guard if you grind. Regular dental checkups let the dentist monitor the bridge, the supporting teeth, and the cement, catching any developing problems early. With good hygiene (especially cleaning under the bridge), sensible habits, and regular monitoring, a bridge can last many years. Much of preventing a bridge from coming loose or failing comes down to protecting the supporting teeth from decay — which is squarely in the patient's hands through diligent daily cleaning.

Frequently asked questions

What is the D6930 dental code?

It's the re-cementing or re-bonding of a fixed bridge that has come loose or off — cleaning and reattaching the existing bridge to its supporting teeth, when it and the teeth are still in good condition.

What should I do if my bridge comes loose?

Save it if it came off, don't use household glue, be gentle with the area, keep it clean, and see your dentist reasonably promptly. Temporary dental cement can hold it briefly if needed.

Why do bridges come loose?

Most often the cement wears out over years. But decay at a supporting tooth's margin or a fractured supporting tooth can also cause it, which would need treatment beyond re-cementing.

How much does it cost to re-cement a bridge?

Often around 80 to 250 USD, far cheaper than a new bridge. If a supporting tooth or the bridge is compromised, a new bridge may be needed instead.

When is a new bridge needed instead of re-cementing?

When there's decay or a fracture on a supporting tooth, the bridge no longer fits, or it keeps coming loose despite re-cementing — signs the foundation isn't sound.

How do I care for a bridge?

Clean under the bridge and around the supporting teeth with a floss threader, interdental brush, or water flosser, brush well, avoid hard/sticky foods, and keep up with checkups to prevent decay on the supporting teeth.

This page is an independent, plain-language explanation for general information only. It is not billing, coding, or clinical advice. For the official CDT descriptor and current-year wording, refer to the American Dental Association.