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Comparison of chairside rectangular chain retainers and multi-stranded conventional retainers: a randomized
Sara Waldenström1, Jilah Qaljaee1, Andrea Bresin2
1Specialist Clinic of Orthodontics, Public Dental Service, Region Halland, Kungsbacka, Sweden.
Chairside rectangular chain retainers and conventional bonded retainers show similar short-term results for orthodontic retention stability, biological side effects, complications, and patient experiences. Further research is needed to confirm long-term efficacy.
Area of Science:
- Orthodontics
- Dental Materials Science
- Biomaterials
Background:
- Evidence-based consensus on optimal orthodontic retention appliances and duration is lacking.
- Fixed retainers are crucial for maintaining orthodontic treatment outcomes.
- Chairside vs. conventional bonded retainers require comparative evaluation.
Purpose of the Study:
- To compare chairside rectangular chain retainers with conventional multi-stranded bonded retainers.
- Assess stability, biological side effects, complications, and patient experiences.
- Evaluate outcomes of Ortho FlexTech (OFT) versus Penta One (PeO) retainers.
Main Methods:
- Single-centre, two-arm, parallel-group randomized controlled trial with 48 patients.
- Primary outcome: Little's Irregularity Index (LII) at 3 and 12 months post-debond.
- Secondary outcomes: inter-canine distance, plaque index, calculus index, bleeding on probing, caries, patient perceptions, and complications.
Main Results:
- No significant differences in LII, biological side effects, complications, or patient experiences between OFT and PeO groups.
- A statistically significant difference was observed in inter-canine distance maintenance.
- Increased calculus index in the OFT group and increased bleeding on probing in the PeO group were noted.
Conclusions:
- Chairside rectangular chain retainers and conventional multi-stranded spiral wire retainers offer comparable short-term clinical outcomes.
- Stability of alignment, biological effects, complications, and patient experiences are similar between the two retainer types.
- Further long-term studies are warranted to confirm these findings.
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