All teeth are different—and so are their problems, and so are their necessary solutions.
The main factors that limit the duration of a visit are: the patient’s ability to keep their mouth open without excess strain, our ability to guarantee painlessness (with the maximum amount of anesthesia – usually during surgery), and the need for multiple dental treatments (most commonly in the treatment of root canals).
Appointments for tooth repair typically last under 2 hours to ensure maximum comfort for the patient. The exception is larger prosthetic interventions, where it's possible to perform more work in one visit.