Bolton tooth-size analysis
Overall and anterior ratios with the arch and amount of tooth-size excess.
Inputs
0 of 2First molar to first molar
mm
mm
Optional, canine to canine
mm
Optional
mm
When to use
- Treatment planning, especially before finishing or IPR decisions.
Pearls and pitfalls
- Ratios outside about 2 standard deviations (overall ±1.91, anterior ±1.65) are usually clinically significant.
Why use
Tells you which arch has the excess and by how many millimeters.
- where
- Md, Mx
- Sum of mandibular and maxillary widths, mm
Ideal overall 91.3% (±1.91); anterior 77.2% (±1.65).