After orthodontic treatment 3 different retention devices will be compared.Thirty patients in each group; Group 1) Bonded retainer 13-23, Group 2)Bonded retainer 12-22 and Group 3) Vacuum-formed retainer covering all erupted teeth in the maxilla. Retention capacity between these three devices will be compared after 2 years of retention by measuring Contact Point displacements (CPD) between 6 anterior teeth and sum of 5 anterior CPDs called Little´s Irregularity Index (LII).
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Changes in LII (sum of 5 contact point discrepancy)among 6 maxillary front teeth
Timeframe: 2 years after retention device in place
Changes in CPD
Timeframe: 2 years after retention device in place