What D2920 means

D2920 covers re-cementing or re-bonding a crown. "D" is dental, "29" is the other-restorative-services group, and "20" is this recement-crown procedure. A crown is cemented onto a prepared tooth. Sometimes a crown comes loose — the cement bond fails and the crown debonds or falls off — but the crown itself is intact and the tooth underneath is sound. In that case, rather than making a new crown, the existing one can simply be re-cemented back onto the tooth. D2920 covers this re-cementing of a loose crown.

So it's a procedure to reattach an existing, intact crown that has come loose, restoring it to its place. It's a common situation (crowns coming loose over time) and a simple, economical fix compared with making a new crown.

This is one of the recement codes: re-cement inlay/onlay (D2910), re-cement post and core (D2915), and re-cement crown (D2920, this one). Re-cementing a crown is appropriate when the crown is intact, fits well, and the tooth is sound; if there are problems (a damaged crown, decay under the crown, a tooth fracture), a new crown or other treatment may be needed. A loose crown should be addressed promptly (and the loose crown kept safe) to protect the exposed tooth. Coverage is under restorative benefits; recement is a low-cost procedure, sometimes with frequency limits or a waiting period after the original placement.

When it's typically used

D2920 is reported for re-cementing or re-bonding a crown that has come loose but is otherwise intact — reattaching the existing crown to a sound tooth, rather than making a new one, when the crown and tooth are in good condition and just need rebonding.

How much does D2920 cost?

Re-cementing a crown is a low fee, often roughly 50 to 200 USD depending on region — a simple procedure of reattaching the existing crown, much less than making a new crown. It's an economical solution when a crown comes loose but is intact and the tooth is sound.

Is D2920 covered by insurance?

Covered under restorative benefits at a low cost. Some plans have a frequency limitation or a waiting period after the original placement (a recently-placed crown coming loose might be considered the original placement's responsibility, often covered by the dentist within a certain period). Coverage is generally straightforward given the low cost. Verifying any frequency limits helps.

What to do if your crown comes loose

A loose or lost crown is a common situation, and understanding what to do helps protect the tooth and get it re-cemented.

If a crown comes loose or falls off, here's what generally helps. Keep the crown safe: if the crown has come off completely, keep it in a safe place (a small container or bag) and bring it to the dentist — if it's intact, it can likely be re-cemented (much cheaper than a new crown), so don't throw it away. Don't try to glue it yourself: avoid using household glues to reattach it (these aren't safe for the mouth and can damage the crown or tooth, complicating proper re-cementing) — let the dentist re-cement it properly. Protect the exposed tooth: with the crown off, the underlying tooth (often a prepared tooth, which can be sensitive) is exposed — be gentle with it, avoid chewing on that side, and keep it clean (you can gently brush it). Some pharmacies have temporary dental cement for very short-term reattachment until you see the dentist, but this is just a stopgap. See the dentist promptly: contact the dentist to have the crown re-cemented (or assessed) — promptly, to protect the exposed tooth and restore the crown. The dentist will examine the crown and tooth and re-cement the crown if appropriate.

So if a crown comes loose, keep it safe, don't glue it yourself, protect the exposed tooth, and see the dentist promptly. This helps ensure the crown can be re-cemented (saving the cost of a new one) and protects the tooth in the meantime. For patients, understanding what to do if a crown comes loose — keep it safe, don't use household glue, protect the exposed tooth, and see the dentist promptly — helps them handle the situation well. Keeping the intact crown allows economical re-cementing. The dentist re-cements the crown (or advises otherwise) when seen. Understanding what to do helps patients respond well to a loose crown — protecting the tooth and preserving the crown for re-cementing — so the crown can be properly reattached economically and the exposed tooth protected until then, handling this common situation effectively.

Why crowns come loose

Crowns come loose for various reasons, and understanding them clarifies what leads to needing a re-cement (and how to help prevent it).

A crown is held on by cement between it and the prepared tooth. This bond can fail over time or due to factors, causing the crown to come loose. Common reasons: cement breakdown over time — dental cement can gradually degrade or wash out over years, weakening the bond until the crown loosens (a very common cause, especially for crowns in place many years); decay under the crown — if decay develops on the tooth under the crown (often starting at the margin), it can undermine the crown's attachment (in this case the decay needs addressing); chewing or biting forces — forces, especially from hard or sticky foods, can stress and break the bond, or a sticky food can pull a crown off; grinding or clenching — heavy bruxism forces can loosen crowns; inadequate retention — if the tooth preparation provided limited retention (e.g., a short tooth), the crown may be more prone to coming loose; and a less-than-ideal original cementation. So crowns come loose mainly due to cement breakdown over time, decay under the crown, forces, grinding, or retention factors.

Understanding why a crown came loose helps determine the response and prevention. If it's simple cement wear (crown and tooth sound), re-cementing resolves it. If decay caused it, the decay needs treating (possibly a new crown). If forces/grinding are a factor, addressing them (e.g., a night guard) helps prevent recurrence. The dentist assesses why the crown came loose. For patients, understanding why crowns come loose — cement breakdown over time, decay under the crown, forces, grinding, or retention factors — clarifies what leads to needing a re-cement and how to help prevent it (good hygiene to prevent decay under the crown, a night guard for grinding, avoiding very sticky/hard foods on the crown). Often it's simply cement wear (addressable by re-cementing); sometimes decay or other factors need additional attention. The dentist determines the cause. Understanding the reasons helps patients see why their crown came loose, whether re-cementing or additional treatment is needed, and how to help prevent recurrence, addressing this common occurrence and reducing the chance of it happening again.

When re-cementing is appropriate

Re-cementing a crown is appropriate in specific situations, and understanding them clarifies when this procedure is used versus needing a new crown.

Re-cementing is appropriate when a crown has come loose but both the crown and the tooth are in good condition. The conditions: the crown is intact (not broken, cracked, or distorted) — so it can be reused; the tooth underneath is sound (no significant new decay, no tooth fracture, no other problem requiring treatment); the crown still fits well (the fit hasn't been compromised); and the reason for the debonding is addressable (often just cement wear, resolved by re-cementing). When these are met, the crown can be cleaned and re-cemented back onto the cleaned tooth, restoring it economically. This is often the case — a well-fitting crown simply coming loose after years (cement having worn out) with everything else sound.

If, however, the crown is damaged, or the tooth has a new problem — particularly decay under the crown (common, and requiring removal of the decay and likely a new crown) or a tooth fracture (which may compromise the tooth) — re-cementing alone isn't appropriate, and a new crown (and treatment of the tooth) is needed. The dentist examines the loose crown and the tooth (often with an X-ray to check for decay under the crown) to determine whether re-cementing is appropriate or a new crown is needed. A consideration: decay under a crown is a common reason crowns come loose and often isn't visible without removing the crown or an X-ray, so the dentist checks for it. For patients, understanding when re-cementing is appropriate — when the crown is intact, the tooth is sound (no decay or fracture under it), and the fit is good — clarifies when this procedure is used versus needing a new crown. Re-cementing is the economical fix when everything is sound; a new crown is needed if there's decay or other problems. The dentist examines (and may X-ray) to determine the appropriate course. Understanding this helps patients see that a loose crown can often be re-cemented economically when the crown and tooth are sound, while decay under the crown or a damaged crown/tooth would require a new crown, with the dentist assessing to determine the best response.

The recement procedure and its longevity

The crown re-cement procedure is simple, and understanding it and the re-cemented crown's longevity clarifies what to expect.

Re-cementing a crown is a simple, quick procedure. After confirming re-cementing is appropriate (the crown intact, the tooth sound, the fit good), the dentist: cleans the crown (removing old cement); cleans and prepares the tooth (removing old cement, preparing for re-bonding); checks the fit; applies fresh cement and seats the crown back onto the tooth; removes excess cement and lets it set; and checks the bite. It's usually done in a single short visit, often without anesthesia (just reattaching the existing crown). So it's a straightforward reattachment, much simpler than making a new crown.

Regarding longevity: a properly re-cemented crown (when the crown and tooth were sound) can serve well, often for a good while — the fresh cement re-establishes the bond. However, the longevity depends on the situation: if the crown came loose simply due to old cement wearing out and everything is otherwise good, re-cementing can last well; if there's an underlying factor (like limited retention from the tooth's shape, or ongoing forces), the crown might come loose again over time, in which case the dentist might address the underlying factor or consider a new crown with better retention. Also, good care (hygiene to prevent decay under the crown, avoiding very sticky/hard foods, a night guard if grinding) helps the re-cemented crown last. For patients, understanding the re-cement procedure (a simple, quick reattachment with fresh cement) and the re-cemented crown's longevity (often serving well, depending on the situation and care) clarifies what to expect. It's a simple, economical fix that can last well when the crown and tooth are sound. The dentist re-cements the crown and advises on care. Understanding this helps patients see that re-cementing a loose crown is a simple, economical procedure that reattaches the sound crown and can serve well with good care, restoring the crown without the cost of a new one, while being aware that underlying factors (if present) might affect how long the re-cementing lasts, with the dentist addressing such factors as needed.

Frequently asked questions

What is the D2920 dental code?

It's re-cementing or re-bonding a crown that has come loose — reattaching an existing, intact crown to a sound tooth, rather than making a new one. It's a simple, common, economical procedure to put a loose crown back in place when the crown and tooth are sound.

What should I do if my crown comes loose?

Keep the crown safe (it can likely be re-cemented, saving money), don't use household glue to reattach it, protect and keep clean the exposed tooth (avoid chewing on that side), and see the dentist promptly. The dentist will examine and re-cement it if appropriate.

Why do crowns come loose?

Common reasons include cement breakdown over time (very common after years), decay under the crown, chewing/biting forces (especially sticky foods), grinding, or limited retention from the tooth's shape. Often it's simply cement wear, which re-cementing resolves.

When can a crown be re-cemented?

When it's intact (not damaged), the tooth underneath is sound (no decay or fracture under it), and the fit is still good. If there's decay under the crown (common) or the crown/tooth is damaged, a new crown is usually needed instead. The dentist examines (often with an X-ray).

How much does re-cementing a crown cost?

Often around 50 to 200 USD, a low fee for the simple reattachment, much less than making a new crown. It's an economical solution when a crown comes loose but is intact and the tooth is sound.

How long does a re-cemented crown last?

Often it serves well, especially if it came loose simply from old cement wearing out and everything is sound. Longevity depends on the situation (underlying factors like limited retention might cause it to loosen again) and good care (hygiene, avoiding sticky foods, a night guard if grinding).

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.