Orthodontic retention--three methods trialed.

Area of Science:

• Orthodontics
• Dental Materials Science
• Clinical Dentistry

Background:

• Orthodontic treatment requires effective retention to maintain results.
• Various retention methods exist, but long-term comparative data is crucial.

Purpose of the Study:

• To compare the long-term clinical effectiveness of three different orthodontic retention strategies.

Main Methods:

• A single-center randomized controlled trial involving 75 patients.
• Three groups: removable vacuum-formed retainer (VFR) with bonded canine-to-canine retainer, VFR with mandibular anterior tooth stripping, and prefabricated positioner.
• Outcome measures included Little's irregularity index, arch dimensions, and overbite/overjet, assessed five years post-retention.

Main Results:

• 69 patients completed two years, and 49 were available at five years post-retention.
• No statistically significant differences were observed between the three retention groups in any measured outcome.
• All methods demonstrated comparable clinical success in maintaining orthodontic results.

Conclusions:

• Maxillary VFR with a mandibular bonded canine-to-canine retainer, maxillary VFR with mandibular anterior tooth stripping, and prefabricated positioners are all effective retention options.
• These methods provide equally favorable clinical outcomes five years after orthodontic treatment.
• Clinicians can confidently recommend any of these three retention approaches.