Dentora Timing: the 24-hour + 2-hour pattern
The data-backed standard is two touches: a full reminder 24 hours before (details + confirm + reschedule options) and a short nudge 2 hours before ("See you at 3pm today! Reply YES to confirm").
The 24-hour message does the logistics; the 2-hour message does the psychology — it arrives exactly when the patient is deciding whether to leave.
Channel: match the patient, not your preference
In the US and Canada, SMS gets the highest open rates for appointment logistics. In the UK, EU, Latin America and the Middle East, WhatsApp dominates. Email works as a backup record but rarely as the primary nudge.
The best-performing clinics let patients pick their channel at booking and then respect it. A WhatsApp lover forced onto SMS — or vice versa — confirms less.
Wording: short, warm, actionable
Compare: "This is a reminder of your appointment tomorrow at 10:00. Please arrive 15 minutes early. Reply C to confirm or call the office to reschedule." vs "Hi {name}! Quick reminder: your checkup is tomorrow at 10am with Dr. {dentist}. Reply YES to confirm, or tap here to pick a new time: {link}".
The second wins because it names the patient, names the dentist, and every action is one tap. Warmth is a feature, not decoration.
What to include (and what to leave out)
Include: patient name, date and time, dentist name, one-tap confirm, one-tap reschedule. For longer procedures, add duration ("about 90 minutes") and any prep ("avoid eating 2 hours before").
Leave out: parking instructions, insurance disclaimers, and anything longer than 4 lines. Logistics that aren’t needed for showing up belong in the confirmation email, not the reminder.
Frequency: where reminders become spam
Two reminders per appointment is the sweet spot. A third message is justified only for high-value, long-duration treatments — and even then, make it a value-add ("Your implant prep guide") rather than another "don’t forget".
Every message should earn its place. Message-efficient sequences cost less in WhatsApp fees and annoy fewer patients — the rare true win-win.
Confirmations need a closed loop
A reminder system without confirmation tracking is just hopeful texting. Every "YES" should mark the appointment confirmed in your schedule; every non-response by the cutoff should trigger the waitlist or a front-desk task.
Close the loop and your reminders become a system. Leave it open and they’re just messages.