What D5671 means

D5671 covers replacing all teeth and acrylic on a cast metal framework, mandibular. "D" is dental, "56" is this partial denture repair/modification area, and "71" is this mandibular framework refurbishment. A 'cast metal framework' is the precision-cast metal skeleton of a cast partial denture (it carries the clasps/rests/connectors and is the durable backbone). 'Replace all teeth and acrylic' means replacing all the prosthetic teeth and all the acrylic (the resin base material) on that framework. 'Mandibular' specifies the lower arch. So D5671 is rebuilding the teeth and acrylic of a lower cast partial on its existing metal framework.

So it's replacing all the worn/damaged teeth and acrylic of a lower cast partial, while reusing the still-good metal framework.

A cast partial denture has a durable cast metal framework plus prosthetic teeth and acrylic (resin) base material. Over years of use, the teeth and acrylic can wear out, fracture, discolor, or deteriorate — even while the metal framework remains structurally sound and well-fitting. When this happens, rather than making an entirely new partial (including a new framework), the existing serviceable framework can be reused, with all the teeth and acrylic replaced — refurbishing the partial. D5671 covers this for the lower (mandibular) arch: the old teeth and acrylic are removed from the framework, and new teeth and new acrylic are processed onto the existing framework (in a dental lab) — producing essentially a rebuilt partial on its original metal skeleton. This is more extensive than a repair or adding a tooth (it's replacing ALL the teeth and acrylic), but less involved/costly than a completely new partial (the framework — a major part of a cast partial's cost and craftsmanship — is preserved). Important: this code is appropriate only when the framework is sound and serviceable; if the framework itself is damaged or needs replacing, a new partial is made instead (not D5671). The maxillary (upper) counterpart is D5670. D5671 is specifically the lower. It's provided by a dentist (with lab work). Coverage depends on the plan (often with frequency limits, e.g., every 5-7 years). This code is in the removable prosthodontics area. Documentation supports the claim.

When it's typically used

D5671 is reported for replacing all the teeth and acrylic on a mandibular (lower) cast partial denture's existing metal framework — a major refurbishment done when the lower partial's teeth and acrylic are worn out, fractured, or deteriorated but the cast metal framework remains sound and serviceable. It rebuilds the partial on its existing framework (vs a new partial). The upper counterpart is D5670.

How much does D5671 cost?

Replacing all teeth and acrylic on a lower partial's framework costs more than a minor repair (it's a major lab refurbishment — all new teeth and acrylic), but less than a completely new partial (the framework is reused). Fees vary by region/lab. Coverage often has frequency limits (e.g., once every 5-7 years, and sometimes a waiting period after the original partial). Verify your specific coverage.

Is D5671 covered by insurance?

Coverage depends on the plan — this major refurbishment is often covered with frequency limits (e.g., once every several years), and may require the framework to be documented as serviceable. A narrative explaining that the teeth/acrylic are worn but the framework is sound (justifying refurbishment vs a new partial) supports the claim. Photos help. Preauthorization is advisable. Verifying coverage helps.

Reusing the framework, rebuilding the rest

The metal skeleton stays; teeth and acrylic are renewed, and understanding this clarifies the code.

Understanding the concept clarifies D5671. A cast partial denture has two kinds of components with very different lifespans: the cast metal framework — the precision-cast metal skeleton (with clasps, rests, connectors) — very durable, often lasting many years; a significant part of the partial's cost and custom craftsmanship; and the teeth and acrylic — the prosthetic teeth and the resin (acrylic) base material — these wear, chip, discolor, or fracture over time (the teeth wear down with chewing; the acrylic can degrade).

So a cast partial often reaches a point where the teeth and acrylic are worn out, but the metal framework is still sound and fits well. D5671 addresses exactly this: reuse the framework (the good metal skeleton stays), and replace all the teeth and acrylic on it (remove the old worn teeth/acrylic, and process new teeth and new acrylic onto the existing framework) — essentially rebuilding the partial on its original framework. The result is a refurbished partial: a 'like-new' set of teeth and base on the proven, well-fitting metal framework. This preserves the costly framework while renewing the parts that wear out. So D5671 reuses the framework and rebuilds the teeth/acrylic. Understanding this helps patients see that a cast partial denture has two kinds of components with very different lifespans — the cast metal framework (the precision-cast metal skeleton, with clasps, rests, connectors, very durable, often lasting many years, a significant part of the partial's cost and custom craftsmanship) and the teeth and acrylic (the prosthetic teeth and the resin/acrylic base material, these wearing, chipping, discoloring, or fracturing over time, the teeth wearing down with chewing and the acrylic able to degrade) — so a cast partial often reaching a point where the teeth and acrylic are worn out but the metal framework is still sound and fits well, D5671 addressing exactly this (reuse the framework/the good metal skeleton stays, and replace all the teeth and acrylic on it/remove the old worn teeth/acrylic and process new teeth and new acrylic onto the existing framework, essentially rebuilding the partial on its original framework), the result being a refurbished partial (a 'like-new' set of teeth and base on the proven well-fitting metal framework), preserving the costly framework while renewing the parts that wear out.

When a refurbishment makes sense

Worn teeth/acrylic but a sound framework, and understanding this clarifies the indication.

Understanding the indication clarifies D5671. A full teeth-and-acrylic replacement on the existing framework is appropriate in a specific scenario: the teeth/acrylic are worn out — generalized wear of the prosthetic teeth (flattened/worn from years of chewing), multiple fractured/chipped teeth, discolored or degraded acrylic, or an accumulation of issues that makes piecemeal repair impractical (so ALL the teeth and acrylic warrant replacement, not just a tooth or two); AND the framework is sound — the cast metal framework is structurally intact, undistorted, and still fits/engages the teeth well (it's serviceable and worth keeping). When both are true, refurbishing on the existing framework (D5671) is the cost-effective choice — restoring full function and appearance without remaking the framework.

It's distinguished from lesser and greater procedures: minor repairs (replacing a single broken tooth D5640, adding a tooth D5650, repairing the base D5611) are for limited damage — not a full teeth/acrylic renewal; a new partial is made if the framework is ALSO damaged/unfit (then D5671 doesn't apply — you can't reuse a bad framework). So D5671 is specifically the 'framework good, everything else worn' refurbishment. A typical case: a years-old lower partial with worn/fractured teeth and an intact, well-fitting framework. So D5671 suits worn teeth/acrylic on a sound framework. Understanding this helps patients see that a full teeth-and-acrylic replacement on the existing framework is appropriate in a specific scenario — the teeth/acrylic are worn out (generalized wear of the prosthetic teeth/flattened/worn from years of chewing, multiple fractured/chipped teeth, discolored or degraded acrylic, or an accumulation of issues making piecemeal repair impractical, so ALL the teeth and acrylic warrant replacement not just a tooth or two) AND the framework is sound (the cast metal framework structurally intact, undistorted, and still fitting/engaging the teeth well, serviceable and worth keeping) — when both true, refurbishing on the existing framework being the cost-effective choice (restoring full function and appearance without remaking the framework), distinguished from lesser and greater procedures (minor repairs like replacing a single broken tooth D5640, adding a tooth D5650, repairing the base D5611 being for limited damage, not a full teeth/acrylic renewal; a new partial being made if the framework is ALSO damaged/unfit, then D5671 not applying since you can't reuse a bad framework), so D5671 specifically being the 'framework good, everything else worn' refurbishment (a typical case being a years-old lower partial with worn/fractured teeth and an intact well-fitting framework).

Refurbish vs new partial: the value

It saves the costly framework, and understanding this clarifies the benefit.

Understanding the value clarifies D5671. The cast metal framework is the most expensive and technically demanding part of a cast partial denture — it's custom-cast (often cobalt-chromium) to precisely engage the patient's specific remaining teeth, with carefully designed clasps, rests, and connectors. A well-made framework that still fits represents significant value. So when only the teeth and acrylic are worn out, reusing the framework (D5671) rather than making an entirely new partial offers clear benefits: lower cost — avoiding remaking the framework (the costly part) makes the refurbishment less expensive than a new partial; proven fit — the existing framework already fits and engages the patient's teeth well (a known, comfortable fit), whereas a new partial means a new framework that must be fitted/adjusted; less chair time — refurbishing may involve fewer/simpler steps than fabricating a whole new partial from scratch; and conservation — it makes good use of a still-serviceable component.

The trade-off: it only works if the framework is genuinely sound (a refurbishment on a compromised framework would be a poor investment) — so the dentist confirms the framework's integrity first. When the framework is good, D5671 is the economical, sensible way to give the patient a fully renewed partial. So D5671 preserves the costly framework's value. Understanding this helps patients see that the cast metal framework is the most expensive and technically demanding part of a cast partial denture (custom-cast, often cobalt-chromium, to precisely engage the patient's specific remaining teeth, with carefully designed clasps, rests, and connectors, a well-made framework that still fits representing significant value) — so when only the teeth and acrylic are worn out, reusing the framework rather than making an entirely new partial offering clear benefits: lower cost (avoiding remaking the framework/the costly part making the refurbishment less expensive than a new partial), proven fit (the existing framework already fitting and engaging the patient's teeth well/a known comfortable fit, whereas a new partial means a new framework that must be fitted/adjusted), less chair time (refurbishing possibly involving fewer/simpler steps than fabricating a whole new partial from scratch), and conservation (making good use of a still-serviceable component) — the trade-off being that it only works if the framework is genuinely sound (a refurbishment on a compromised framework being a poor investment), so the dentist confirming the framework's integrity first, and when the framework is good D5671 being the economical sensible way to give the patient a fully renewed partial.

Where D5671 fits in the codes

D5671 is among the partial modification codes, and understanding this clarifies the coding.

Understanding where D5671 sits clarifies the coding. D5671 is among the partial denture repair/modification codes, specifically the major refurbishment codes: D5670 (replace all teeth and acrylic on cast metal framework, maxillary), D5671 (the same, mandibular, this code). These sit alongside the smaller modifications: D5630 (repair/replace broken clasp, per tooth), D5640 (replace broken teeth, per tooth — for one or a few teeth, not all), D5650 (add tooth to existing partial), D5660 (add clasp, per tooth) — and the structural repairs D5611/D5612 (resin base) and D5621/D5622 (cast framework).

So D5671 is precisely: replace ALL teeth and acrylic + on the existing cast metal framework + mandibular (lower). Its direct counterpart is D5670 (the maxillary/upper version). It's distinguished from D5640 (which replaces only broken teeth, not all teeth + acrylic) by being a complete teeth/acrylic renewal, and from a new partial by reusing the framework. The dentist codes D5671 when refurbishing a lower cast partial (all new teeth/acrylic) on its existing framework. So D5671 is the lower full-refurbishment among the codes. Understanding this helps patients see that D5671 is among the partial denture repair/modification codes, specifically the major refurbishment codes — D5670 (replace all teeth and acrylic on cast metal framework, maxillary), D5671 (the same, mandibular, this code) — these sitting alongside the smaller modifications D5630 (repair/replace broken clasp, per tooth), D5640 (replace broken teeth, per tooth, for one or a few teeth not all), D5650 (add tooth to existing partial), D5660 (add clasp, per tooth), and the structural repairs D5611/D5612 (resin base) and D5621/D5622 (cast framework) — so D5671 is precisely replace ALL teeth and acrylic + on the existing cast metal framework + mandibular/lower, its direct counterpart being D5670 (the maxillary/upper version), distinguished from D5640 (which replaces only broken teeth, not all teeth + acrylic) by being a complete teeth/acrylic renewal and from a new partial by reusing the framework, the dentist coding D5671 when refurbishing a lower cast partial (all new teeth/acrylic) on its existing framework.

Frequently asked questions

What is the D5671 dental code?

It's replacing all the teeth and acrylic on a mandibular (lower) cast partial denture's existing metal framework — a major refurbishment where the worn-out prosthetic teeth and acrylic base are all replaced, while the still-sound cast metal framework is reused. It rebuilds the partial on its original framework, costing less than a whole new partial. The upper counterpart is D5670.

Why reuse the old framework?

Because the cast metal framework is the most expensive, technically demanding part of a cast partial — custom-cast to precisely fit your specific teeth. When it's still sound and fits well, reusing it (and just replacing the worn teeth and acrylic) costs less than a new partial, keeps a proven comfortable fit, and conserves a good component. Only the parts that wear out are renewed.

When is this done instead of a new partial?

When the prosthetic teeth and acrylic are worn out, fractured, or deteriorated, BUT the cast metal framework is structurally sound, undistorted, and still fits well. If the framework itself is also damaged or no longer fits, a new partial is made instead (you can't reuse a compromised framework). The dentist confirms the framework's integrity before choosing D5671.

How is this different from replacing a broken tooth?

D5671 replaces ALL the teeth and acrylic (a full refurbishment). Replacing just one or a few broken teeth is a different, smaller code (D5640, per tooth), and adding a tooth is D5650. So D5671 is for generalized wear/damage warranting a complete teeth-and-acrylic renewal, not a spot repair. It's more extensive than a minor repair but less than a new partial.

How is the refurbishment done?

In a dental lab: the old worn teeth and acrylic are removed from the framework, and new teeth and new acrylic base are processed onto the existing, cleaned framework — essentially rebuilding the partial on its original metal skeleton. The result is a 'like-new' set of teeth and base on your proven, well-fitting framework. It involves lab time (your partial is sent out).

Is it covered, and what does it cost?

Cost is more than a minor repair (it's a major lab refurbishment) but less than a new partial (the framework is reused) — varying by region/lab. Coverage often has frequency limits (e.g., once every 5-7 years) and may need the framework documented as serviceable. A narrative (teeth worn, framework sound) and photos help; preauthorization is advisable. Verify your 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.