Work out bolton analysis instantly with clear inputs, formula shown and shareable results.
Divides the mandibular anterior six tooth widths by the maxillary six and compares the ratio with Bolton's 77.2 percent norm.
Bolton anterior ratio
Anterior ratio (%) = mandibular anterior 6 sum / maxillary anterior 6 sum x 100; the norm is 77.2%, with an overall 12-tooth norm of 91.3%
Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
It predicts that ideal overbite and overjet cannot be achieved without stripping, build-up or extraction.
The anterior ratio is used more often because anterior discrepancies dominate aesthetic outcomes.