Dental chair utilisation: how to fill the chair, not the diary

The chair is the unit of production

A dentist can work two chairs with assistants if the schedule allows. A chair only works when a patient is in it. So the number that describes a clinic is not patient count or appointment count but chair utilisation: minutes with a patient in the chair divided by minutes the chair was available.

A clinic measuring this number for the first time usually finds it far lower than it thought.

Why the chair is empty while the diary is full

Five causes repeat. Appointments are booked in one standard length (30 minutes) while a check-up needs 15, a filling 45 and a root canal 75. A patient arrives 20 minutes late and the whole day slips. Sterilisation between patients is not in the schedule. One assistant across two chairs slows both. A no-show with no warning leaves a whole hour.

Every one of these is solved by scheduling, not by an extra chair.

A duration per service, not one duration for everyone

The first step is for every service to have its real duration in the system, including set-up and sterilisation. The booking then holds the chair for the right length. After two months the numbers show that this dentist's filling takes 50 minutes not 45, so their duration is adjusted, not everyone's.

Schedule around the chair and the assistant, not only the dentist

A booking that checks only the dentist books a dentist onto an occupied chair. The right booking checks dentist, chair, assistant and equipment (x-ray, laser) together and blocks the clash before it becomes a crowd in the waiting room.

In a clinic where a dentist runs two chairs, the schedule puts anaesthesia and set-up on one chair and the work on the other, which raises utilisation without hiring a dentist.

Fill the gap before it happens

A morning cancellation leaves an afternoon gap. The waitlist fills it: patients who asked for an earlier time get an automatic WhatsApp message with the open slot, and the first to confirm takes it.

Recurring weak hours (Tuesday 2 to 4, say) are opened to online booking for short services, cleanings or check-ups, so time that was never being sold fills up.

Lateness is managed, not tolerated

A patient 20 minutes late for a 30-minute appointment takes the appointment after theirs. The written rule (after 15 minutes the appointment is rebooked) is enforced with a reminder an hour before, a message asking for confirmation in the morning, and check-in from the patient's phone on arrival. A dentist who starts late shows in the numbers too.

When you need a new chair

When utilisation of the existing chairs exceeds 80% on most days with a waitlist longer than two weeks. Before that, a new chair spreads the empty time across three chairs instead of two. The number that settles the decision is revenue per chair hour: if the current chair produces below its capacity, the problem is the schedule.

What to ask of the software

A booking that checks dentist, chair, assistant and equipment, a duration per service and per dentist, a waitlist that fills cancellations automatically, check-in from the phone, and a utilisation report per chair, per hour and per weekday.