Evaluation of efficacy of different types of retainers post orthodontic treatment

Abstract

Aim: Purpose of this study was to evaluate the efficacy of 3 different types of retainers (Hawley removable, Essix removable and Fixed) of the mandibular and maxillary anterior sextant and to assess patient perception of crowding. Methodology: A retrospective study of 80 patients was carried out for a time period of 1-2 years into retention. E models (digital models) were assessed pre- and post-orthodontically using Little’s Irregularity Index. The amount of Irregularity was compared for 3 retention groups (Hawley, Essix and Fixed). Relapse was also subjectively measured. Results: Increase in the Irregularity Index of the mandibular incisors was observed after wearing Hawley retainers, including crowding which was significantly more than patients with Fixed retainers. Conclusion: Hawley retainers allow for more mandibular incisor movement rather than the Fixed retainers.