Aim: To verify whether some factors could be related to Bolton's
anterior ratio: buccolingual thickness of upper incisors, mesiodistal
tipping of upper incisors, overjet and overbite, and if there is gender
dimorphism. Methods: Thirty-five pairs of dental casts with natural
normal occlusion were evaluated, proceeding from 27 females and 8 male
Caucasian individuals, aged between 13 years old and 17 years and 4
months (mean age: 15y8m). A digital caliper and a ruler were used to
make the measurements. Results: The anterior ratio was 77.48% ±
2.22, being statistically similar to Bolton's, 77.20% ± 1.65.
Based on Pearson's correlation test, only the overbite presented
relation to the anterior ratio. It was not found gender dimorphism.
Conclusions: Overbite was inversely proportional to Bolton's anterior
ratio, hence, when the anterior ratio is increased, the overbite could
be decreased and vice-versa
