Treatment of Adults with Anterior Mandibular Teeth Crowding: Reliability of Little’s Irregularity Index

Table 1

Group	Dentoalveolar discrepancy	Treatment option	Number
1	Less than 3 mm	Expansion of the dental arch	100
2	From 1 to less than 5 mm	Interproximal enamel reduction	101
3	More than 5 mm	Extraction of one lower incisor	101