Your crown remake rate is climbing, and it is not your prep

<p>You are a general dentist running a restorative practice, and you have lost a morning this month to a crown that would not seat. Then it happened again three weeks later. You are pattern-matching now, not venting. The question underneath the frustration is whether your remake rate is actually abnormal, and if it is, whether the fault sits with your prep, your scan, or your lab's QC.</p><p>Here is the number nobody publishes cleanly: most labs quietly accept a 10% remake or significant-adjustment rate as normal. A practice running 15 crown cases per week at that rate loses roughly 1.5 cases weekly to rework. Across a year that is close to 75 cases and, per Glidewell's own operator math, about 40 hours of chair time. A full clinical week you never billed for. A digital lab operating with automated verification should be running under 2.5%. If you are seeing more than one remake per 20 crowns, the arithmetic says the problem is systemic, not one-off.</p><p>The Reddit thread currently ranking #1 for this query is literally titled 'Who's paying for the remake?' That signal matters. Dentists searching this phrase are not asking for a technique refresher. They are asking who eats the cost, and whether the relationship with their current lab still makes economic sense. If your remakes cluster with one lab across multiple operators in your practice, that is your answer.</p><p>For DSO clinical directors reading this: the pattern gets worse across locations. Inconsistent remake rates between offices are almost always a lab-consistency problem, not a doctor-consistency problem. A 10-to-30 office group with three different labs will see three different remake rates, and the delta is not driven by prep quality.</p>

<p>Six causes drive crown remakes, and only two of them are prep-side. Occlusal clearance under 1.5mm and undefined margins account for a real slice, yes. But the other four sit inside the lab: CAD design errors on contact pressure and occlusion, mill calibration drift, sintering variance on zirconia, and verification that happens by eye instead of by machine. When a lab runs 500 units a day through human-only QC, statistical variance guarantees that a percentage ships out-of-spec. That percentage is your remake pile.</p><p>The deeper mechanism is outsourced milling. A mid-market lab that ships CAD files to a third-party milling center loses control of the tolerance chain. The scan is clean, the design is clean, and then the mill runs a worn bur on a case that needed a fresh one. The crown arrives, you seat it, the contact is heavy on the mesial, and now you are grinding a $400 restoration in the chair. The lab blames the scan. You blame the lab. Neither of you can prove it because there is no verification file.</p><p>The other silent driver is turnaround pressure. When a lab is behind, technicians skip the second review. Rushed cases become the next week's remakes. Turnaround and remake rate are the same problem viewed from two angles, which is why the labs winning on speed and the labs winning on fit tend to be the same labs.</p>

<p>Dani Dental runs every crown through machine-vision QC before it ships. Every restoration is scanned against its design file and flagged if it deviates from spec. If it does not meet standard, it does not leave the bench. That single control drops remake rate below 2.5% across our crown-and-bridge line, which is roughly a quarter of the informal industry-average number most labs quote when pressed.</p><p>The second control is single-lab accountability. We do not outsource milling. The scan, the design, the mill, the sinter, and the verification happen under one roof in Arizona, on equipment we calibrate weekly. When something goes wrong, one named case coordinator picks up the phone, and the technician who ran the case is on the line inside the hour, not two business days later. The Dobrikov family has been on the bench since Sofia in 1988, and three generations of technicians means the person answering your call has actually run the case type you are asking about.</p><p>And when a remake does happen: worry-free remake warranty, no chair-time argument, no invoice negotiation. Send us one crown case this month. If it does not seat first-time, we absorb the remake and credit the chair time. That is the offer.</p>