Tracking Lab Turnaround Time Across Cases: From the Office's View

Ask a practice manager how long their lab takes and you will get a range. "Two weeks, maybe three on crowns. A month on implants. Longer if it's a holiday." Ask the same question with a date attached and the answer collapses into a shrug. The lab gets graded on memory, and memory grades the late cases harder than the on-time ones.

That is a problem for two reasons. First, chair time is the most expensive resource in the practice, and lab turnaround is the single biggest external input to chair-time predictability. Second, when it comes time to renegotiate, switch vendors, or onboard a second lab for capacity, the practice has no defensible data. Just opinions.

This post is a working guide for restorative practices, prosthodontists, oral surgeons, and small DSOs (the 10 to 30 office range, where procurement is fast enough to act on data) who want to measure lab turnaround properly. No new software required. The point is to build the habit, not the dashboard.

What Turnaround Time Actually Means

The first mistake is treating turnaround as one number. It is at least four numbers, and conflating them is why the conversation with the lab rep always devolves.

Ship-to-ship timeis the calendar days from when the case leaves your office to when the finished case arrives back. This is what the lab usually quotes. It includes courier time on both ends, which the lab does not control.

In-lab timeis the calendar days the case spent inside the lab's four walls. This is what the lab actually owns. A good lab will give you this number on request. A great lab prints it on the case slip.

Working days vs calendar days.A 10-day quote that crosses a weekend and a federal holiday is a 7-working-day case. Pick one convention and stick to it. Working days is more useful for scheduling; calendar days is more useful for patient communication.

Case-type-specific turnaround.A single-unit zirconia crown and a six-unit anterior bridge with custom shade do not belong in the same bucket. Neither does an All-on-X provisional and a night guard. If you only track one average, you are tracking nothing.

The minimum useful breakdown is four categories: single-unit crown and bridge, multi-unit crown and bridge, removables, and implant prosthetics (including surgical guides and All-on-X). DSOs running across multiple locations should add a fifth: by office, so you can see whether the courier route or the front-desk handoff is the variable.

The Spreadsheet That Actually Works

You do not need a lab management module. You need six columns and the discipline to fill them in.

1. Case ID or patient initials
2. Case type (one of the four or five buckets above)
3. Date shipped to lab
4. Date received back at office
5. Date seated (or remake flag)
6. Notes (any communication delays, shade changes, design revisions)

That is it. Six columns. One row per case. Filled in by whoever logs the impression or scan and updated when the case comes back.

The reason most tracking efforts fail is not the spreadsheet. It is the second entry, the receive date. Front desk signs for the package and stacks it on the case shelf. Nobody writes down the day it arrived. Two weeks later when the patient seats, the only date in the system is the seat date, which tells you nothing about the lab.

Fix this with a sticker. Print a small label that says RECEIVED and a date field. Whoever opens the case box writes the date. Twenty seconds per case. End of problem.

What to Calculate, and How Often

Monthly is the right cadence. Weekly is too noisy; quarterly is too late to act on. Pull the spreadsheet on the first Monday of the month and run four numbers per case-type bucket:

Median in-lab days.Use median, not average. One outlier case (the patient who took three weeks to approve a shade photo) will wreck an average and tell you nothing about the lab's typical performance.

90th percentile in-lab days.This is the number that matters for scheduling. If 90 percent of your single-unit crowns come back in 9 working days or fewer, you can confidently book the seat appointment at day 12 and have a buffer.

Remake rate.Remakes per 100 cases shipped, by category. Industry conversation puts an acceptable benchmark in the low single digits for crown and bridge; anything above 5 percent is a quality conversation with the lab, not a turnaround conversation. (Dani Dental's internal benchmark sits under 2.5 percent across crown and bridge categories.)

Communication delay days.Calendar days the case sat waiting on a response from either side: a shade clarification, a margin question, a design approval. This number lives in the notes column and tells you whether the lab's communication model is costing you time. A lab where the technician on the case picks up the phone in hours will show near-zero delay days. A lab routed through a central CSR queue will show 2 to 4 delay days on every complex case.

What the Numbers Are Actually For

Three decisions, in order of frequency.

Scheduling.Once you have a 90th percentile by case type, you can book seat appointments with a real buffer instead of guessing. A restorative practice that moves from "two to three weeks, we'll call you" to "your seat is November 14 at 2pm" closes more cases on the first visit, because the patient walks out with a date.

Lab review.Once a year, sit with your primary lab and walk through the numbers. Not as an ambush. Send the data a week ahead. A lab that takes the review seriously will come back with explanations (the courier route changed in August, the implant case backed up because the abutment vendor delayed) and adjustments. A lab that gets defensive about its own data is telling you something useful.

Capacity planning.Small DSOs adding offices, or single practices ramping into All-on-X, hit lab capacity ceilings before they hit chair capacity ceilings. The turnaround spreadsheet is the early warning. When the 90th percentile for implant prosthetics drifts from 18 days to 24 days across two quarters, the lab is full. Time to have the conversation about a second vendor or a dedicated capacity carve-out, before the wheels come off.

The Conversation to Have With Your Lab

When you have three months of data, schedule a call. Bring the numbers. Ask three questions:

1. What is your internal in-lab target by case type, and how does it compare to what I'm measuring?
2. When a case slips past that target, what is the most common reason, and what is the notification protocol?
3. Who is the named technician on my complex cases, and what is the direct line?

The answers tell you whether you are working with a lab that owns its turnaround or a lab that hopes you don't notice. Both exist. The data tells you which one you have.