Methods: Using 3-D digital models, position of bracket slots were calculated. Archwire-like curves were designed to analyze the relationship between overjet and dental arch width.
Results:
1. There were no statistically valid difference between right and left overjet.
2. Average overjets were found to be 2.41±0.79 mm at the middle incisor, 2.37±0.69 mm at the canine, 2.2±0.63 mm at the first premolar and 1.98±0.5 mm at the first molar.
3. There was no statistically significant interrelationship between dental arch widths and overjet.
Conclusions: It is recommended that overjet of individualized upper and lower arch to be 2.5mm at the anteriors and 2mm at the posterior.