Work out orthodontic treatment time instantly with clear inputs, formula shown and shareable results.
Divides the total required tooth movement by the achievable monthly rate and adds a finishing phase, using the well-established figure of about 1 mm of movement per month.
Treatment duration
Active months = total movement (mm) / rate (mm/month); total = active months + finishing months
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
Orthodontic tooth movement is limited by bone remodelling, which proceeds at roughly 1 mm per month regardless of force beyond an optimum.
Comparable for mild to moderate cases; complex cases with extractions generally still favour fixed appliances.