Partial Dentures — Case-First Lab Service for Clinics

Cast metal frameworks in cobalt-chromium, Vitallium (nickel-free), titanium or PEEK, with heat-cured or injection-molded PMMA saddles and VITA, Ivoclar, Shofu or Sinkoyo teeth. All-acrylic partials and flippers. Flexible nylon partial dentures. Reline, rebase, add-a-tooth and repair for appliances made by us or by another lab. Attachment-retained and implant-overdenture partials when the implant brand, platform and components are specified.

A digital scan (STL, PLY, OBJ or 3Shape DCM) or VPS impressions of both arches, a centric bite, a shade photo at the lab light setting, and an Rx that names the teeth to replace, the abutment status, clasp preference, border extent decisions, due date and any allergy notes. A patient case ID is enough — the patient's full name is not required.

Yes, within one business day of arrival. The two most common calls we flag are an unclear ridge border on a free-end case and a bite recorded in a position the opposing cast does not confirm. Both are faster to fix at intake than at try-in.

The design decides this, not a fixed number. In practice, a cast frame is more predictable when there is at least one sound abutment on each side of the arch and two or three in total for a Class III situation; a single-tooth flipper does not require two abutments. For a Class I or II free-end case the number is less important than the condition of the remaining teeth and the ridge. We will tell you after reviewing the scan or model whether the design we would propose is well supported by the dentition you have.

Both. For anterior cases, the question is usually how much metal the patient will accept — a flexible nylon or a cast frame with aesthetic clasps are the two common answers. For posterior and free-end cases, rigidity and clasp strategy matter more than how metal looks.

Yes to both. A single anterior gap is often best served by a flexible nylon or an acrylic flipper; a multi-tooth or long-span case usually earns a cast metal frame. The clinical trade-off against a bridge or an implant stays with the dentist.

A direct-to-consumer kit (DTC flexible or over-the-counter online kit, usually sold in S/M/L sizes) skips the parts of the workflow that matter most for a partial: no survey of the abutments, no bite registered in a reproducible position, no border mold, no finished occlusion, and no articulated check of the opposing arch. The common failure modes on a lab-made partial — framework rock, clasp fatigue, flange lifting, worn rests, failed reline — are themselves mostly consequences of decisions made before the appliance exists. Removing the clinical stage removes those decisions, not the failures.

Routine failure modes on removable partials: base fracture, clasp fatigue or deformation, rest wear, reline failure after ridge resorption, debonded acrylic from the framework. Each is logged under the case ID with the original design and production records; QC does a root-cause review against the stage checks and the signed design. If the cause sits with the lab, we remake, free, prioritized. If the cause sits upstream — a dropped box, a changed opposing arch, a prescription that was later modified — we quote the repair or remake separately and show the trace. The point is to make the attribution visible, not to argue it.

Turnaround depends on the design — a cast CoCr frame with a wax try-in has more stages than a flipper. We confirm the schedule in the design preview, not before. One decision that genuinely shortens the schedule: digital cases skip the stone-pour and the physical shipment of a model, which usually saves one to two working days versus a physical-impression case of the same complexity. Rush slots are available; see "partnership terms" above for how they work.

Yes. White-label packaging and prescriptions are available, Istar does not contact your end dentist, and NDAs or quality agreements are signed on request. A minimum monthly lab-fee threshold applies for ongoing wholesale accounts — single-case shipments are accepted for trial, but a long-term account that would not cover the back-and-forth courier cost is not a fit for either side.

Lab-side defects — a framework that does not seat, a flange that lifts, a clasp placed incorrectly, inaccurate occlusion against the sign-off, shade outside agreed tolerance — are remade free. We cover the remake and the return shipping within our courier scheme; implant parts and third-party components are quoted separately. Changes requested after design sign-off, or remakes on data flagged at intake, are not free. The published terms behind that policy are on the refund and returns page.

That is a clinical call, and the two public references do not say quite the same thing. The NHS tells patients to remove dentures every night, and warns against wearing them overnight unless the dentist advises it: trapped food raises the risk of gum infection and decay, and there is a choking risk (NHS — Dentures). The ADA patient page linked above takes a staged view — a brand-new partial may be worn almost continuously at first, because that is the quickest way to find the spots that need adjusting, and after those adjustments the dentist will usually have the patient take it out before bed and put it back in the morning. Both converge on "out at night, kept moist" for a settled appliance; the early phase is a clinical decision, not a lab one. We build to the wear instruction on the prescription and do not set a schedule from the lab.

The ACP position statement is blunt about the premise: removable complete and partial prostheses are medical devices with limited lifespans, not permanent restorations, and their longevity is limited by continuing change in the hard and soft tissue under the base — which is what drives relining, rebasing, and eventually remaking (ACP — The Frequency of Denture Replacement). On incoming cases the triggers matter more than a year range: a frame that has started to rock because a distal abutment moved; a clasp that no longer engages the survey line; a flange that lifts after ridge resorption; a fracture that keeps recurring at the same point, which usually means the design is fighting the occlusion rather than that the acrylic was bad. Any of these is a signal to reassess. A reline buys time when the tissue has changed but the frame and teeth are sound; a remake is the honest answer when the frame no longer fits the teeth it was designed around.

Yes. The removable department produces both full dentures and implant-retained overdentures. For implant cases, we need the implant brand, platform and connection, scan body model with the matching CAD library, and — for cross-arch work — a verification jig to confirm the scan.