I have a dentist appointment on [day] and will need to leave by [time]; I'll wrap up the urgent bits first.
Running late
Running Late From A dentist appointment: Telling Your Boss
If a dentist appointment runs over, a prompt update with a revised time keeps your manager informed and your day workable.
Say what you need, briefly
Dental slots rarely fall outside work hours. Give notice with the date and leaving time; you don't need to explain the treatment.
Update your return time clearly
If you're running late back, send a short update as soon as you know, with a revised time and confirmation that nothing urgent is slipping. A prompt, factual update protects trust better than going quiet.
Example messages
Reminder that my dental appointment is this afternoon; I'll head out around [time].
I need to leave by [time] for an appointment I couldn't reschedule; priorities are covered.
Mistakes to avoid
Don't go quiet and let people wonder. A short, prompt update with a new time is what's needed.
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This page shares wording ideas, not legal or HR advice. Follow your own employer's time-off policy.
Common questions
Do I have to say it's the dentist?
No. An appointment you can't move is a complete reason.
When should I send the update?
As soon as you know you'll be late back, with a revised time and cover confirmed.