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Chair time is the only thing a dental clinic really sells. Rent, salaries and equipment leasing are paid by the hour whether anyone is sitting in the chair or not.
Most clinics assume idle time means empty days. Usually it does not. It is fifteen minutes here and twenty there, spread through a full-looking schedule, and it adds up to more than any cancellation.
Measure it before changing anything
Take one ordinary week. For each chair, record booked hours and actual treatment hours.
The gap between those two is where the money goes. A clinic that is booked 85% and treating 60% does not have a demand problem — it has a scheduling problem, and more marketing would make it worse.
The four leaks
Gaps between appointments
A schedule with a 20-minute hole at 11:40 has that hole every day, and nobody notices because the day looks full.
Gaps come from appointment types with mismatched lengths sitting next to each other. Fix it by standardising durations — 20, 40, 60 minutes and nothing in between — so blocks tessellate instead of leaving fragments.
Late starts
The first appointment of the day sets the whole day. If it starts eight minutes late, every subsequent patient waits, and the last one leaves annoyed.
Late starts are usually not the dentist. They are the room not being ready: instruments still being laid out, the previous day's notes being finished, the computer logging in.
Move preparation to the end of the previous day rather than the start of the next.
Cancellations nobody fills
A cancellation is not lost time if you can fill it. Most clinics cannot, because there is no list of people who would come sooner.
Keep a short waiting list — twenty patients who said yes to "would you like an earlier appointment if one opens?" That question costs nothing at booking and turns cancellations into ordinary appointments.
Admin done in the chair
Writing notes, taking payment, and booking the next visit while the patient is still in the chair uses your most expensive room for work that needs no room at all.
Notes belong in the chair — they are clinical, and delaying them costs accuracy. Payment and rebooking do not. Move both to reception.
Sequence appointments deliberately
Two rules recover a surprising amount:
Put long appointments early. A long appointment that overruns at 09:00 has the rest of the day to absorb it. The same overrun at 16:00 pushes into staff overtime.
Cluster by type where you can. Three hygiene appointments in a row need one setup pattern. Alternating hygiene, endodontics, hygiene means changing the room three times.
Buffers are not idle time
There is a temptation, having read all this, to remove every buffer. Do not.
A schedule with no slack converts one delay into a full day of delays, and the recovery costs more than the buffer saved. Five to ten minutes after long or unpredictable appointments is a running cost, not waste.
What to expect
Realistically, a clinic that measures and fixes the four leaks recovers somewhere between half an hour and two hours per chair per day. At your cost per chair-hour, that number is worth calculating before deciding this is not a priority.
Re-measure after a month
Same exercise: booked hours versus treatment hours, one ordinary week. If the gap has not narrowed, the leak is somewhere you have not looked — most often late starts, because they are the easiest to under-report.
In DOQ, appointment types carry their own durations and buffers, and the schedule shows gaps as gaps rather than hiding them between bookings.