What D5740 means

D5740 covers relining a maxillary partial denture, chairside. "D" is dental, "57" is this denture repair/reline/rebase area, and "40" is this chairside partial reline. A 'reline' resurfaces the tissue (fitting) side of a denture — adding a new layer of base material to re-adapt it to the tissues. 'Maxillary partial denture' = an upper partial. 'Chairside' (also called 'direct') means the reline is performed directly in the dental office at the chair (using a reline material that sets in/at the mouth), as opposed to 'laboratory' (sent to a dental lab). So D5740 is an in-office reline of an upper partial denture.

So it's resurfacing the fitting side of an upper partial's base with new material, done right in the office (chairside) at the appointment.

A reline re-adapts a denture's base to the current tissues (after the ridge has changed) by adding a new layer of material to the fitting (tissue) surface — restoring a snug fit without replacing the whole base (that's a rebase) or making a new denture. For a partial denture, the reline resurfaces the base portions (that rest on the edentulous ridge areas). There are two ways to do a reline: chairside (direct) — D5740 — done in-office at the chair: the dentist applies a reline material to the fitting surface of the partial and seats it in the mouth so it adapts to the tissues, and the material sets; the partial is then trimmed/finished — typically completed in the single visit, so the patient keeps their denture the same day; and laboratory (indirect) — D5760 for the upper partial — an impression is taken with the denture and sent to a dental lab, which processes the reline (the patient may be without the denture briefly). The chairside reline (D5740) is faster (same-visit) and convenient, while a lab reline can offer a more durable/precise result (processed under controlled conditions). The dentist chooses based on the situation. D5740 specifically is the chairside (direct), maxillary (upper), partial-denture reline. It's provided by a dentist. Coverage depends on the plan (relines have timing/frequency rules). This code is in the removable prosthodontics area. Documentation supports the claim.

When it's typically used

D5740 is reported for relining a maxillary (upper) partial denture chairside (directly in the office) — resurfacing the tissue side of the partial's base with new material to re-adapt it to the changed tissues and restore the fit, completed in-office (typically same-visit). It's used when an upper partial's fit has deteriorated (ridge changes) and a chairside reline (vs a lab reline or rebase) is appropriate.

How much does D5740 cost?

A chairside reline of an upper partial's cost reflects the in-office procedure (done at the chair, typically same-visit) — generally less than a laboratory reline or a rebase. Sample fee-schedule values are in the low-hundreds range (varying by region). Relines usually aren't covered for a period after the original partial, and have frequency limits afterward. Verify your specific coverage.

Is D5740 covered by insurance?

Coverage for a reline depends on the plan — relines are typically not covered for a period after the original partial is delivered (often 6 months to ~2 years), and have frequency limits afterward. Documentation of the partial, the poor fit (ridge changes), and the reline supports the claim. Chairside (direct) and laboratory (indirect) relines are coded separately (D5740 vs D5760). Verifying coverage and the timing/frequency rules helps.

What a reline does

It resurfaces the fitting side to restore the fit, and understanding this clarifies the code.

Understanding what a reline does clarifies D5740. A denture's fit depends on how well its tissue (fitting) surface adapts to the underlying tissues (the ridge). When the ridge changes (resorbs) over time, the fitting surface no longer matches the tissues — so the denture loosens. A reline restores the fit by resurfacing the fitting side: a new layer of base material is added to the tissue surface of the denture, shaped to the current tissues — so the denture once again adapts closely (snugly) to the ridge.

For a partial denture (D5740), this means resurfacing the base portions (the parts resting on the edentulous ridge areas) — re-adapting them to the changed ridge there. The reline: restores the snug fit (re-establishing close adaptation and the resulting stability/comfort); doesn't replace the whole base — it adds a layer to the existing base (unlike a rebase, which replaces the base); and keeps the teeth and framework (only the fitting surface is renewed). So a reline is a relatively conservative way to refresh a denture's fit. So D5740 resurfaces the fitting side to restore the fit. Understanding this helps patients see that a denture's fit depends on how well its tissue (fitting) surface adapts to the underlying tissues (the ridge), and when the ridge changes/resorbs over time the fitting surface no longer matches the tissues so the denture loosens — a reline restoring the fit by resurfacing the fitting side (a new layer of base material added to the tissue surface of the denture, shaped to the current tissues, so the denture once again adapting closely/snugly to the ridge) — for a partial denture (D5740) this meaning resurfacing the base portions (the parts resting on the edentulous ridge areas, re-adapting them to the changed ridge there) — the reline restoring the snug fit (re-establishing close adaptation and the resulting stability/comfort), not replacing the whole base (adding a layer to the existing base, unlike a rebase which replaces the base), and keeping the teeth and framework (only the fitting surface renewed) — so a reline being a relatively conservative way to refresh a denture's fit.

Chairside (direct) vs laboratory (indirect)

Chairside is done in-office same-visit, and understanding this clarifies the method.

Understanding chairside vs laboratory clarifies D5740. A reline can be done two ways, and the code distinguishes them: chairside (direct) reline — D5740 for the upper partial — performed directly in the dental office at the chair: the dentist applies a reline (relining) material to the fitting surface of the partial, seats it in the patient's mouth so the material adapts to the tissues, lets it set, then removes, trims, and finishes the denture — typically all in the single appointment, so the patient leaves the same day with their relined denture; and laboratory (indirect) reline — D5760 for the upper partial — the dentist takes an impression using the denture (capturing the fit), and sends it to a dental laboratory, which processes the new reline material onto the denture under controlled conditions; the patient may be without the denture for a short time while the lab works.

The trade-offs: chairside (D5740) is faster and more convenient (one visit, same-day) and doesn't require sending the denture away — but the in-mouth-set materials may be less durable/precise than a lab-processed reline; laboratory (D5760) offers a more durable, precisely-processed result (heat-cured/processed material), but takes longer and the patient is briefly without the denture. The dentist chooses based on the situation (the degree of correction needed, durability needs, convenience, etc.). D5740 is specifically the chairside (direct) method. So chairside means an in-office, same-visit reline. Understanding this helps patients see that a reline can be done two ways and the code distinguishes them — chairside (direct) reline (D5740 for the upper partial, performed directly in the dental office at the chair: the dentist applying a reline material to the fitting surface of the partial, seating it in the patient's mouth so the material adapts to the tissues, letting it set, then removing, trimming, and finishing the denture, typically all in the single appointment, so the patient leaving the same day with their relined denture) and laboratory (indirect) reline (D5760 for the upper partial, the dentist taking an impression using the denture/capturing the fit and sending it to a dental laboratory which processes the new reline material onto the denture under controlled conditions, the patient possibly without the denture for a short time while the lab works) — the trade-offs being that chairside is faster and more convenient (one visit, same-day) and doesn't require sending the denture away but the in-mouth-set materials may be less durable/precise than a lab-processed reline, while laboratory offers a more durable precisely-processed result (heat-cured/processed material) but takes longer with the patient briefly without the denture — the dentist choosing based on the situation, D5740 being specifically the chairside (direct) method.

When a reline is the right choice

It suits a fit refresh when the base is otherwise good, and understanding this clarifies the indication.

Understanding the indication clarifies D5740. A reline is appropriate when a partial denture's fit has deteriorated (from ridge changes) but the denture is otherwise in good shape — specifically: the fit is loose — the base portions no longer adapt to the (changed) edentulous ridge, so the partial is loose/less stable there; the base is otherwise sound — the existing base material is in good condition (not worn out, degraded, or in need of full replacement) — so just resurfacing it (a reline) suffices, rather than replacing it (a rebase); the framework and teeth are good — no need for a new partial; and the change is suitable for a reline — the amount of correction needed is within what a reline (an added layer) can achieve (a very large change might call for a rebase or new partial).

If instead the base material itself needs replacing (worn/degraded), a rebase (D5720) is more appropriate; if the partial is broken, a repair; if it's worn out overall, a new partial. So a reline (D5740 chairside) is the right choice for refreshing the fit when the partial is otherwise good and the correction is modest. The chairside option specifically suits cases where a same-visit, in-office reline is appropriate. So D5740 suits a fit refresh of an otherwise-good partial. Understanding this helps patients see that a reline is appropriate when a partial denture's fit has deteriorated (from ridge changes) but the denture is otherwise in good shape — specifically the fit is loose (the base portions no longer adapting to the changed edentulous ridge, so the partial loose/less stable there), the base is otherwise sound (the existing base material in good condition, not worn out/degraded/in need of full replacement, so just resurfacing it/a reline suffices rather than replacing it/a rebase), the framework and teeth are good (no need for a new partial), and the change is suitable for a reline (the amount of correction needed within what a reline/an added layer can achieve, a very large change possibly calling for a rebase or new partial) — so if instead the base material itself needs replacing (worn/degraded) a rebase (D5720) being more appropriate, if the partial is broken a repair, if it's worn out overall a new partial — so a reline (D5740 chairside) being the right choice for refreshing the fit when the partial is otherwise good and the correction is modest, the chairside option specifically suiting cases where a same-visit in-office reline is appropriate.

Where D5740 fits in the codes

D5740 is among the reline codes, and understanding this clarifies the coding.

Understanding where D5740 sits clarifies the coding. D5740 is among the denture reline codes, which are organized by complete/partial, arch, and chairside/laboratory. The reline grid: chairside (direct) — D5730 (complete maxillary), D5731 (complete mandibular), D5740 (maxillary partial, this code), D5741 (mandibular partial); laboratory (indirect) — D5750 (complete maxillary), D5751 (complete mandibular), D5760 (maxillary partial), D5761 (mandibular partial). (Plus the rebase codes D5710-D5721 for whole-base replacement, and repair codes for breakage.)

So D5740 is precisely: reline + partial + maxillary (upper) + chairside (direct). Its counterparts are D5741 (the mandibular partial chairside reline), D5760 (the maxillary partial laboratory reline — same denture, lab method), and D5730 (the complete maxillary chairside reline — same method, complete denture). The dentist codes D5740 when relining an upper partial denture chairside. So D5740 is the chairside upper partial reline among the codes. Understanding this helps patients see that D5740 is among the denture reline codes (organized by complete/partial, arch, and chairside/laboratory) — the reline grid being chairside (direct): D5730 (complete maxillary), D5731 (complete mandibular), D5740 (maxillary partial, this code), D5741 (mandibular partial); laboratory (indirect): D5750 (complete maxillary), D5751 (complete mandibular), D5760 (maxillary partial), D5761 (mandibular partial); plus the rebase codes D5710-D5721 for whole-base replacement and repair codes for breakage — so D5740 is precisely reline + partial + maxillary/upper + chairside/direct, its counterparts being D5741 (the mandibular partial chairside reline), D5760 (the maxillary partial laboratory reline, same denture/lab method), and D5730 (the complete maxillary chairside reline, same method/complete denture), the dentist coding D5740 when relining an upper partial denture chairside.

Frequently asked questions

What is the D5740 dental code?

It's relining a maxillary (upper) partial denture chairside — resurfacing the tissue (fitting) side of the partial's base with new material, done directly in the office (chairside) at the appointment, to re-adapt it to the changed tissues and restore the fit. 'Chairside' means it's done in-office (not sent to a lab), so you typically keep your denture the same day.

What's the difference between chairside and laboratory relines?

Chairside (direct, D5740) is done in-office at the chair — the dentist applies the reline material, sets it in your mouth, and finishes it, usually in one visit (you keep your denture same-day). Laboratory (indirect, D5760) sends the denture to a lab to process the reline (more durable/precise, but takes longer and you're briefly without it). The dentist chooses based on the situation.

How is a reline different from a rebase?

A reline adds a new layer of material to the fitting surface (resurfacing the existing base). A rebase replaces the entire base material. So a reline is less extensive — it refreshes the fit when the base is otherwise good; a rebase renews the whole base when it needs replacing. Both keep the teeth and framework.

When is a reline needed?

When the partial's fit has loosened because the ridge changed (resorbed), but the denture is otherwise good — the base is sound (just needs resurfacing, not replacing), and the framework and teeth are fine. A reline re-adapts the base to the current tissues to restore a snug, stable fit. If the base itself needs replacing, a rebase is used instead.

Will I keep my denture the same day?

With a chairside reline (D5740), usually yes — it's done in-office in a single visit (the material is applied, set in your mouth, and the denture finished), so you typically leave the same day with your relined partial. A laboratory reline (D5760) would involve sending the denture to a lab, so you might be without it briefly.

Is it covered, and what does it cost?

Cost reflects the in-office procedure (generally less than a lab reline or a rebase) — typically low hundreds, varying by region. Coverage depends on the plan: relines usually aren't covered for a period after the original partial, with frequency limits afterward. Chairside and lab relines are coded separately. Verify your specific coverage.

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.