No differences seen in outcomes between three different methods of orthodontic retention

Area of Science:

• Orthodontics
• Dental Materials Science
• Clinical Dentistry

Background:

• Orthodontic treatment aims to correct malocclusions and improve dental aesthetics.
• Retention is crucial to maintain treatment outcomes and prevent relapse.
• Various retention methods exist, but their comparative effectiveness requires ongoing evaluation.

Purpose of the Study:

• To compare the effectiveness of three different orthodontic retention methods.
• To evaluate the long-term stability of orthodontic treatment results.
• To determine the optimal retention strategy for post-orthodontic care.

Main Methods:

• A three-arm, parallel-group, patient-randomized trial involving 75 patients.
• Patients received one of three retention methods after fixed appliance therapy: vacuum-formed retainer with bonded canine-to-canine retainer (Group V-CTC), vacuum-formed retainer with anterior stripping (Group V-S), or a prefabricated positioner (Group P).
• Dental casts were analyzed at baseline, debonding, and 12 and 24 months post-retention for key occlusal parameters.

Main Results:

• No clinically significant differences were found between the three retention methods in maintaining orthodontic treatment results.
• All tested retention strategies effectively controlled relapse to clinically acceptable levels.
• The majority of relapse occurred within the first year of retention, with minimal changes observed in the second year.

Conclusions:

• Removable vacuum-formed retainers combined with bonded retainers, vacuum-formed retainers with stripping, and prefabricated positioners are all effective in retaining orthodontic results.
• Orthodontic relapse is most pronounced during the initial year of retention.
• Long-term stability is achievable with appropriate retention protocols, regardless of the specific method used among those tested.