What D5512 means

D5512 covers repairing a broken complete denture base, maxillary. "D" is dental, "55" is this denture repair area, and "12" is this maxillary complete base repair. A 'complete denture' is a full denture (replacing all the teeth in an arch — here the upper/maxillary). The 'base' is the gum-colored (pink acrylic) part of the denture that rests on the tissues and holds the teeth. 'Repair broken... base' means fixing the base when it's broken (cracked or fractured). 'Maxillary' specifies the upper arch. So D5512 is repairing the broken base of a complete upper denture.

So it's fixing a broken (cracked/fractured) acrylic base of a full upper denture — restoring its integrity.

Dentures can break — the acrylic base can crack or fracture from being dropped, from stress/fatigue over time, from a poor fit causing uneven stress, or from biting forces. A common break is a fractured denture base (e.g., an upper denture cracking down the midline, or a piece breaking). When the base breaks, the denture can't function (it's split or compromised) and needs repair. D5512 covers repairing the broken base of a complete upper denture: the pieces are reassembled/the crack is addressed, and the base is repaired with acrylic (bonding/reinforcing the fracture) to restore a solid, functional base. This is often a relatively quick repair (sometimes same-day, in-office or via a lab) — much less involved than making a new denture. The arch-specific coding: as of CDT updates, the complete-denture-base repair is split by arch — D5511 (mandibular/lower) and D5512 (maxillary/upper) — replacing the older single code (D5510). So D5512 is specifically the upper. (Note: repairing/replacing broken teeth on a complete denture is a different code — D5520 — this code, D5512, is for the base.) It's provided by a dentist (sometimes with lab work). Coverage depends on the plan (repairs are often covered, with their own frequency rules). This code is in the removable prosthodontics area. Documentation supports the claim.

When it's typically used

D5512 is reported for repairing a broken complete maxillary (upper) denture base — fixing the cracked/fractured acrylic base of a full upper denture to restore its integrity. It's used when an upper complete denture's base has broken (e.g., from being dropped, fatigue, or stress) and the base is repaired (vs replacing teeth, D5520, or making a new denture). The arch-specific code is for the upper (lower is D5511).

How much does D5512 cost?

Repairing a broken complete upper denture base's cost reflects a relatively minor repair (reassembling/bonding the fractured acrylic) — modest, and far less than a new denture. Sample fee-schedule values are in the tens-of-dollars to low-hundreds range (varying by region and whether lab work is involved). Repairs are often covered by plans. Verify your specific coverage.

Is D5512 covered by insurance?

Coverage for a denture base repair depends on the plan — repairs are commonly covered (with their own frequency rules), unlike relines/rebases which have post-delivery waiting periods. Documentation of the break and the repair (and that it's a base repair, not tooth replacement or a new denture) supports the claim. A narrative describing the damage and repair helps. Verifying coverage helps.

When and why a denture base breaks

Acrylic bases can crack or fracture, and understanding this clarifies the need.

Understanding why denture bases break clarifies the need for D5512. A complete denture's base is made of acrylic (a hard resin) — durable, but breakable under certain conditions: being dropped — dentures are often dropped during cleaning/handling (e.g., onto a hard sink or floor), which can crack or fracture the acrylic; fatigue/stress over time — repeated flexing during chewing can, over years, lead to stress fractures in the acrylic (especially if there's a weak point or thin area); a poor fit — a denture that doesn't fit well (e.g., after the ridge has changed) can flex unevenly under biting forces, stressing the base and predisposing it to crack (a midline fracture of an upper denture is classically associated with fit/stress issues); and strong biting forces or other trauma.

A common pattern is an upper complete denture cracking along the midline (front to back), or a piece of the base breaking off. When this happens, the denture is compromised — it may be split into pieces or have a crack that makes it unusable/unstable — and needs repair to be functional again. D5512 addresses repairing such a broken upper denture base. So denture bases break from drops, fatigue, or stress. Understanding this helps patients see that a complete denture's base is made of acrylic (a hard resin, durable but breakable under certain conditions) — being dropped (dentures often dropped during cleaning/handling, e.g., onto a hard sink or floor, which can crack or fracture the acrylic), fatigue/stress over time (repeated flexing during chewing leading over years to stress fractures in the acrylic, especially if there's a weak point or thin area), a poor fit (a denture that doesn't fit well, e.g., after the ridge has changed, flexing unevenly under biting forces, stressing the base and predisposing it to crack, a midline fracture of an upper denture classically associated with fit/stress issues), and strong biting forces or other trauma — a common pattern being an upper complete denture cracking along the midline (front to back) or a piece of the base breaking off, when the denture is compromised (split into pieces or with a crack that makes it unusable/unstable) and needs repair to be functional again, D5512 addressing repairing such a broken upper denture base.

How the base is repaired

The fracture is bonded/reinforced with acrylic, and understanding this clarifies the procedure.

Understanding the repair clarifies D5512. Repairing a broken denture base restores the base's integrity, generally by: reassembling the pieces — if the denture is fractured into pieces, they're accurately repositioned/aligned (so the repaired denture has the correct shape/fit); bonding/repairing with acrylic — the fracture is repaired using acrylic (denture repair resin) — bonding the pieces together and reinforcing the area, filling and curing the repair material so the base becomes solid again; and finishing — the repair is trimmed, smoothed, and polished so the base is comfortable and the repair is clean.

The goal is a solid, functional base restored to its proper form — so the denture fits and functions as before. This can often be done relatively quickly (some repairs are same-day, in-office; more involved ones may go to a lab). It's much less involved than fabricating a new denture (reusing the existing denture, just fixing the break). Note: if the fracture was due to a fit problem, addressing the underlying fit (e.g., a reline/rebase) may also be advisable to prevent re-fracture. So the base is repaired by bonding/reinforcing with acrylic. Understanding this helps patients see that repairing a broken denture base restores the base's integrity, generally by reassembling the pieces (if the denture is fractured into pieces, they're accurately repositioned/aligned so the repaired denture has the correct shape/fit), bonding/repairing with acrylic (the fracture repaired using acrylic/denture repair resin, bonding the pieces together and reinforcing the area, filling and curing the repair material so the base becomes solid again), and finishing (the repair trimmed, smoothed, and polished so the base is comfortable and the repair is clean) — the goal being a solid functional base restored to its proper form (so the denture fits and functions as before), often done relatively quickly (some repairs same-day in-office, more involved ones going to a lab), much less involved than fabricating a new denture (reusing the existing denture, just fixing the break) — noting that if the fracture was due to a fit problem, addressing the underlying fit (e.g., a reline/rebase) may also be advisable to prevent re-fracture.

Base repair vs other denture fixes

It addresses the base specifically, and understanding this clarifies the coding distinctions.

Understanding the distinctions clarifies D5512. Denture problems can affect different parts, and there are different codes for different fixes: base repair (D5512 maxillary, D5511 mandibular) — for a broken denture base (the acrylic that holds teeth and rests on tissues) — this code; tooth replacement (D5520) — for replacing missing or broken teeth on a complete denture (when the prosthetic teeth, not the base, are damaged/lost) — a different fix; reline/rebase (D5730-D5761, D5710-D5711) — for refitting (re-adapting/replacing the base to fit changed tissues) — addressing fit, not breakage; and for partial dentures, separate repair codes — e.g., repairing a partial's resin base (D5611/D5612) or cast framework (D5621/D5622), or replacing clasps/teeth (D5630/D5640/D5650/D5660).

So D5512 specifically addresses a broken complete upper denture base — distinct from replacing teeth (D5520), refitting (relines/rebases), or partial-denture repairs. The dentist uses D5512 when the upper complete denture's base is what's broken and being repaired. (If both the base is broken and teeth are lost, both repairs/codes may apply.) So D5512 is the complete-upper base repair specifically. Understanding this helps patients see that denture problems can affect different parts with different codes for different fixes — base repair (D5512 maxillary, D5511 mandibular, for a broken denture base/the acrylic that holds teeth and rests on tissues, this code), tooth replacement (D5520, for replacing missing or broken teeth on a complete denture, when the prosthetic teeth, not the base, are damaged/lost, a different fix), reline/rebase (D5730-D5761, D5710-D5711, for refitting/re-adapting or replacing the base to fit changed tissues, addressing fit not breakage), and for partial dentures separate repair codes (e.g., repairing a partial's resin base D5611/D5612 or cast framework D5621/D5622, or replacing clasps/teeth D5630/D5640/D5650/D5660) — so D5512 specifically addressing a broken complete upper denture base (distinct from replacing teeth, refitting, or partial-denture repairs), the dentist using it when the upper complete denture's base is what's broken and being repaired (if both the base is broken and teeth are lost, both repairs/codes may apply).

Where D5512 fits in the codes

D5512 is among the arch-specific repair codes, and understanding this clarifies the coding.

Understanding where D5512 sits clarifies the coding. D5512 is among the denture repair codes. For complete dentures, the base repair is arch-specific: D5511 (repair broken complete denture base, mandibular/lower), D5512 (repair broken complete denture base, maxillary/upper, this code). These replaced the older single code D5510 (which didn't specify arch) — a CDT update split denture-base repairs by arch. Related complete-denture repair: D5520 (replace missing or broken teeth — complete denture, per tooth). For partial dentures, the parallel arch-specific repairs are: D5611/D5612 (repair resin partial denture base, mandibular/maxillary), D5621/D5622 (repair cast partial framework, mandibular/maxillary), plus D5630 (repair/replace broken clasp — per tooth), D5640 (replace broken teeth — per tooth), D5650 (add tooth to existing partial), D5660 (add clasp — per tooth).

So D5512 is precisely: repair + complete denture base + maxillary (upper). Its direct counterpart is D5511 (the mandibular/lower complete base repair). The dentist codes D5512 when repairing a broken complete upper denture base. So D5512 is the complete-upper base repair among the codes. Understanding this helps patients see that D5512 is among the denture repair codes — for complete dentures the base repair being arch-specific: D5511 (repair broken complete denture base, mandibular/lower), D5512 (repair broken complete denture base, maxillary/upper, this code), these replacing the older single code D5510 (which didn't specify arch, a CDT update splitting denture-base repairs by arch), with related complete-denture repair D5520 (replace missing or broken teeth, complete denture, per tooth) — and for partial dentures the parallel arch-specific repairs being D5611/D5612 (repair resin partial denture base, mandibular/maxillary), D5621/D5622 (repair cast partial framework, mandibular/maxillary), plus D5630 (repair/replace broken clasp, per tooth), D5640 (replace broken teeth, per tooth), D5650 (add tooth to existing partial), D5660 (add clasp, per tooth) — so D5512 is precisely repair + complete denture base + maxillary/upper, its direct counterpart being D5511 (the mandibular/lower complete base repair), the dentist coding D5512 when repairing a broken complete upper denture base.

Frequently asked questions

What is the D5512 dental code?

It's repairing a broken complete maxillary (upper) denture base — fixing the cracked or fractured acrylic base of a full upper denture to restore its integrity. The base is the pink acrylic that holds the teeth and rests on the tissues; if it breaks (e.g., from being dropped or stress), this repair makes it solid and functional again. It's the upper-arch version (the lower is D5511).

Why do denture bases break?

From being dropped (e.g., onto a hard sink during cleaning), fatigue/stress over years of chewing (stress fractures, especially at thin or weak areas), or a poor fit causing the denture to flex unevenly under biting forces (a classic cause of a midline crack in an upper denture). Strong forces or trauma can also break the base. The break leaves the denture compromised and needing repair.

How is a broken base repaired?

The broken pieces are accurately reassembled/aligned, then bonded and reinforced with acrylic (denture repair resin) so the base becomes solid again, and the repair is trimmed, smoothed, and polished. The goal is to restore the base to its proper form and function. It's often relatively quick (sometimes same-day) and far less involved than making a new denture.

How is this different from replacing a denture tooth?

D5512 repairs the broken base (the acrylic that holds the teeth and rests on the tissues). Replacing missing or broken teeth on a complete denture is a different code (D5520). So D5512 is for base damage, D5520 for tooth damage. If both the base broke and teeth were lost, both repairs (and codes) may apply.

Should the cause of the break be addressed too?

Sometimes yes — if the base broke because of a poor fit (the denture flexing unevenly), simply repairing it may not prevent another fracture. In that case, addressing the underlying fit (e.g., a reline or rebase) may also be advisable. Your dentist will assess whether the break was a one-off (like a drop) or points to an underlying issue.

Is it covered, and what does it cost?

Cost reflects a relatively minor repair (reassembling/bonding the fractured acrylic) — modest, far less than a new denture (tens of dollars to low hundreds, varying by region and whether lab work is involved). Repairs are commonly covered by plans (with their own frequency rules), unlike relines/rebases that have post-delivery waiting periods. 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.