Hygiene Capacity, a 1,150-Patient Recall Backlog, and 14% Failed Appointments
Your two-hygienist practice has 2,400 active patients on a six-month recall and no dedicated recall coordinator. Each hygienist has eight one-hour appointments per day and works four days per week; the practice is open 50 weeks per year. A chart audit shows 1,150 patients are more than 30 days past their recall due date. In addition, 180 patients are on three-month periodontal maintenance and new-patient hygiene averages 55 per month. Last year 14% of hygiene appointments were no-shows or late cancellations, and the two doctors each produce about $85,000 per month in restorative care; the hygienists produce about $22,000 each per month. The front desk calls patients who are 60 days overdue, but only when the schedule has empty time. The doctors want to add a third hygiene day but are unsure whether the problem is demand or throughput.
1. Calculate hygiene capacity and demand, and identify whether the practice has a demand problem, a throughput problem, or both.
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Capacity is 2 hygienists x 8 appointments per day x 4 days per week x 50 weeks = 3,200 appointments per year, or about 267 per month. A 14% failed-appointment rate removes about 448 appointments, leaving roughly 2,752 usable appointments.
Demand is larger. Recall at 2,400 patients x 2 visits = 4,800; periodontal maintenance at 180 x 4 = 720; new-patient hygiene at 55 x 12 = 660. Total demand is about 6,180 visits per year. Even if only 60% of recall patients return, demand is 2,880 + 720 + 660 = 4,260, still about 33% above capacity.
The practice has both problems. The 1,150 overdue patients are a backlog, not the entire demand. The no-show loss alone equals about 448 appointments, or nearly one full hygiene day per week (8 x 50 = 400). Adding a third day would add only 400 appointments per year, about 12.5% capacity, so it would not by itself close the gap.
2. The doctors want to add a third hygiene day. What do you recommend, and what evidence would support the decision?
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Recommend a staged response rather than an immediate permanent payroll increase. First, recover the lost capacity: assign a recall coordinator or a dedicated front-desk block, call and text overdue patients, confirm appointments 48 hours ahead, use a waitlist, and set a written late-cancellation policy with deposits for repeat offenders. Fill open time from the overdue list, not from walk-ins. Measure for 90 days.
At the same time, test a temporary third hygiene day or extended hours. The evidence for making it permanent should include schedule utilization above 85%, a third-next-available hygiene appointment longer than three weeks, a stable or falling overdue count, and failed appointments below 8%. Also confirm the doctors can absorb the restorative flow; track hygiene-to-restorative conversion so hygiene growth does not create a restorative bottleneck. If those markers are met, add a part-time hygienist or an additional day. If not, the problem is throughput and recall management, not chair capacity.
3. Which metrics should the practice track monthly, and why?
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Track leading and lagging indicators together. Useful measures are failed-appointment rate, schedule utilization by hygienist, days to third available hygiene appointment, percentage of active patients overdue, recall compliance, reappointment rate before the patient leaves, new-patient call-to-appointment conversion, hygiene production per visit, and hygiene-to-restorative conversion. Add the number of overdue patients contacted and the number reappointed.
These measures separate demand from throughput. For example, high demand with low utilization points to scheduling and confirmation failures; high utilization with a long third-next-available time points to capacity; a falling overdue count with stable production suggests the recall process is working. Review the dashboard monthly with the doctors and hygienists, assign an owner for each metric, and set a small number of targets rather than tracking everything without action.