What D5711 means

D5711 covers rebasing a complete mandibular denture. "D" is dental, "57" is this denture repair/reline/rebase area, and "11" is this rebase. A 'complete denture' replaces all the teeth in an arch (here the mandibular/lower arch). The 'base' is the gum-colored acrylic that rests on the ridge and holds the teeth. To 'rebase' is to replace that base material, making a new base for the existing teeth. So D5711 is replacing the base of a complete lower denture.

So it's replacing the entire base of a lower full denture with new material, while reusing the existing denture teeth.

D5711 is the lower-arch version of D5710 (the upper). The concept is identical: over time, a complete denture stops fitting because the ridge (gum and bone) resorbs/changes, so the denture base no longer adapts to the shrunken tissues (the denture loosens, rocks, or is uncomfortable). When the teeth are still good but the base no longer fits, the base can be renewed — either by relining (adding a layer to the fitting surface) or, more extensively, rebasing (replacing the entire base, D5711 for the complete lower). A rebase makes a new base for the existing teeth, restoring the fit while preserving the teeth (saving a whole new denture). The only difference from D5710 is the arch — D5711 is mandibular (lower). Lower complete dentures are especially prone to fit issues over time, because: the lower ridge tends to resorb significantly (often more problematically than the upper over the long term); and the lower denture has less retention to begin with (no palate to help with suction, and the tongue/floor of mouth are active) — so maintaining a good fit (via relines/rebases as the ridge changes) is particularly important for lower dentures. D5711 specifically is for the complete (full) mandibular (lower) denture. It's provided by a dentist/prosthodontist (often with lab work). Coverage depends on the plan (relines/rebases have timing/frequency rules). This code is in the removable prosthodontics area. Documentation supports the claim.

When it's typically used

D5711 is reported for rebasing a complete mandibular (lower) denture — replacing the entire denture base with new material while keeping the existing teeth. It's the lower-arch counterpart of D5710, used when a complete lower denture's base no longer fits the tissues well (e.g., after ridge resorption) but the teeth are still good, and a full base replacement (more than a reline) is appropriate.

How much does D5711 cost?

Rebasing a complete lower denture's cost reflects replacing the entire base (more involved than a reline, often with lab work) — typically more than a reline but far less than a new denture. Sample fee-schedule values are in the low-hundreds range (varying by region/lab). Relines/rebases usually aren't covered for a period after the original denture, and have frequency limits afterward. Verify your specific coverage.

Is D5711 covered by insurance?

Coverage for a rebase depends on the plan — relines/rebases are typically not covered for a period after the original denture is delivered (often 6 months to ~2 years), and have frequency limits afterward. Documentation of the denture, the poor fit (ridge changes), and the need for a rebase (vs a reline) supports the claim. Verifying coverage and the timing/frequency rules helps.

The lower complete denture rebase

It's D5710 for the lower jaw, and understanding this clarifies the code.

Understanding D5711 is straightforward once D5710 is understood — it's the same rebase procedure for the lower (mandibular) arch. D5711 is rebasing a complete mandibular denture — replacing the entire base of a full lower denture with new material, while keeping the existing denture teeth. The procedure and rationale are identical to the upper version (D5710): the denture stopped fitting because the ridge changed (resorbed); the teeth are still good, but the base no longer adapts to the tissues; so the base is replaced (rebased) — a new base for the existing teeth — restoring the fit.

The only difference is the arch — D5711 is for the lower (mandibular) complete denture, D5710 for the upper. The dentist uses D5711 when rebasing a complete lower denture. So D5711 is the lower complete denture rebase. Understanding this helps patients see that D5711 is the same rebase procedure as D5710 but for the lower (mandibular) arch — rebasing a complete mandibular denture (replacing the entire base of a full lower denture with new material while keeping the existing denture teeth), the procedure and rationale identical to the upper version D5710 (the denture stopped fitting because the ridge changed/resorbed, the teeth still good but the base no longer adapting to the tissues, so the base replaced/rebased — a new base for the existing teeth — restoring the fit) — the only difference being the arch (D5711 for the lower/mandibular complete denture, D5710 for the upper), the dentist using D5711 when rebasing a complete lower denture.

Why lower dentures especially need refitting

The lower ridge resorbs and retention is harder, and understanding this clarifies the context.

Understanding lower-arch factors clarifies the context of D5711. Lower (mandibular) complete dentures tend to have more fit and retention challenges than upper ones, for a few reasons: significant ridge resorption — the lower ridge often resorbs substantially over time (the bone can shrink considerably with long-term denture wear), changing the foundation the denture rests on — so the fit deteriorates and refitting (relines/rebases) is commonly needed; less inherent retention — the upper denture benefits from the palate (a large surface area that helps create suction/retention), but the lower denture has no palate (the tongue occupies the center), so it relies on a smaller ridge area and has inherently less retention — making a good, well-adapted fit especially important (a poorly-fitting lower denture loosens easily); and active surrounding tissues — the tongue, cheeks, and floor of mouth are active around a lower denture, which can dislodge it if the fit isn't good.

For these reasons, maintaining the fit of a lower denture (through relines/rebases as the ridge resorbs) is particularly important — and lower dentures may need refitting over time as the ridge continues to change. A rebase (D5711) renews the base to re-establish the best possible fit on the changed lower ridge. So lower dentures especially benefit from refitting like D5711. Understanding this helps patients see that lower/mandibular complete dentures tend to have more fit and retention challenges than upper ones — significant ridge resorption (the lower ridge often resorbing substantially over time, the bone shrinking considerably with long-term denture wear, changing the foundation the denture rests on, so the fit deteriorating and refitting/relines/rebases commonly needed), less inherent retention (the upper denture benefiting from the palate, a large surface area helping create suction/retention, but the lower denture having no palate since the tongue occupies the center, so relying on a smaller ridge area and having inherently less retention, making a good well-adapted fit especially important since a poorly-fitting lower denture loosens easily), and active surrounding tissues (the tongue, cheeks, and floor of mouth active around a lower denture, which can dislodge it if the fit isn't good) — so maintaining the fit of a lower denture through relines/rebases as the ridge resorbs being particularly important (lower dentures may need refitting over time as the ridge continues to change), a rebase renewing the base to re-establish the best possible fit on the changed lower ridge.

Rebase, reline, or new denture

The choice depends on the base, teeth, and fit, and understanding this clarifies the options.

Understanding the options clarifies when D5711 is chosen. When a lower complete denture no longer fits well, there are a few paths: reline — add a layer of new material to the fitting surface (D5731 chairside or D5751 laboratory for the complete lower) — the least extensive, re-adapting the existing base's tissue surface; rebase (D5711) — replace the entire base — more extensive than a reline, making a new base for the existing teeth (chosen when the base material itself should be replaced, not just resurfaced); and a new denture — make a completely new denture — when the denture is too worn, the teeth are no longer good, or it's otherwise inadequate (beyond what relining/rebasing can fix).

The dentist chooses based on: the condition of the base (worn/degraded → rebase or new); the condition of the teeth (still good → reline/rebase preserves them; worn out → new denture); the degree of misfit; and the overall denture quality. A rebase (D5711) is the right choice when the teeth are good but the base needs full replacement (more than a reline) to restore the fit. So the path depends on the denture's condition. So D5711 is one option among reline/rebase/new. Understanding this helps patients see that when a lower complete denture no longer fits well there are a few paths — reline (adding a layer of new material to the fitting surface, D5731 chairside or D5751 laboratory for the complete lower, the least extensive, re-adapting the existing base's tissue surface), rebase (D5711, replacing the entire base, more extensive than a reline, making a new base for the existing teeth, chosen when the base material itself should be replaced not just resurfaced), and a new denture (making a completely new denture when the denture is too worn, the teeth are no longer good, or it's otherwise inadequate, beyond what relining/rebasing can fix) — the dentist choosing based on the condition of the base (worn/degraded → rebase or new), the condition of the teeth (still good → reline/rebase preserves them; worn out → new denture), the degree of misfit, and the overall denture quality — so a rebase being the right choice when the teeth are good but the base needs full replacement (more than a reline) to restore the fit.

Where D5711 fits in the codes

D5711 is the lower complete rebase, and understanding this clarifies the coding.

Understanding where D5711 sits clarifies the coding. D5711 is among the denture rebase/reline maintenance codes. The rebase codes (whole base replacement) are: D5710 (rebase complete maxillary), D5711 (rebase complete mandibular, this code), D5720 (rebase maxillary partial), D5721 (rebase mandibular partial). The reline codes (added layer), split by chairside/laboratory, are: D5730/D5731 (reline complete maxillary/mandibular chairside), D5740/D5741 (reline maxillary/mandibular partial chairside), D5750/D5751 (reline complete maxillary/mandibular laboratory), D5760/D5761 (reline maxillary/mandibular partial laboratory).

So D5711 is precisely: rebase + complete + mandibular (lower). Its direct counterpart is D5710 (the maxillary/upper complete rebase — same but upper). It's distinguished from the partial rebases (D5720/D5721) by being for a complete denture, and from the reline codes by being a rebase. The dentist codes D5711 when rebasing a complete lower denture. So D5711 is the complete-lower rebase among the codes. Understanding this helps patients see that D5711 is among the denture rebase/reline maintenance codes — the rebase codes (whole base replacement) being D5710 (rebase complete maxillary), D5711 (rebase complete mandibular, this code), D5720 (rebase maxillary partial), D5721 (rebase mandibular partial), and the reline codes (added layer, split by chairside/laboratory) being D5730/D5731 (reline complete maxillary/mandibular chairside), D5740/D5741 (reline maxillary/mandibular partial chairside), D5750/D5751 (reline complete maxillary/mandibular laboratory), D5760/D5761 (reline maxillary/mandibular partial laboratory) — so D5711 is precisely rebase + complete + mandibular/lower, its direct counterpart being D5710 (the maxillary/upper complete rebase, same but upper), distinguished from the partial rebases (D5720/D5721) by being for a complete denture and from the reline codes by being a rebase, the dentist coding D5711 when rebasing a complete lower denture.

Frequently asked questions

What is the D5711 dental code?

It's rebasing a complete mandibular (lower) denture — replacing the entire denture base with new material while keeping the existing teeth. It's the lower-arch counterpart of D5710, used when a complete lower denture's base no longer fits the tissues well (after the ridge has changed) but the teeth are still good.

How is it different from D5710?

Only the arch. D5711 is the mandibular (lower) version; D5710 is the maxillary (upper) version. Both rebase a complete denture (replace the whole base while keeping the teeth) — same procedure, just different jaw. The dentist picks the code matching the arch.

Why do lower dentures often need refitting?

The lower ridge tends to resorb (shrink) significantly over time, changing the foundation. And lower dentures have less inherent retention than uppers (no palate to help with suction; the tongue occupies the center), so a well-adapted fit is especially important. As the ridge changes, refitting (relines/rebases) is commonly needed to keep a lower denture fitting well.

What's the difference between a rebase and a reline?

A reline adds a new layer of material to the fitting surface (resurfacing the existing base). A rebase replaces the entire base (a new base for the existing teeth). A rebase is more extensive — chosen when the base itself needs replacing, not just resurfacing. Both keep the existing teeth and avoid a whole new denture.

When would a new denture be made instead?

When the denture is too worn or otherwise inadequate beyond what refitting can fix — e.g., the teeth are worn out (not just the base's fit), the base is badly degraded, or the denture no longer serves well overall. If the teeth are still good and only the fit is the issue, a reline or rebase preserves the denture; if not, a new denture may be appropriate.

Is it covered, and what does it cost?

Cost reflects replacing the whole base (more than a reline, often with lab work, but far less than a new denture) — typically low hundreds, varying by region/lab. Coverage depends on the plan: relines/rebases usually aren't covered for a period after the original denture, with frequency limits afterward. Verify your specific coverage and timing rules.

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.