Abstract
Design
Single centre randomised controlled trial.
Intervention
Patients treated by a single orthodontist were randomised to one of three retention methods: removable vacuum-formed retainer (VFR) covering the palate and the maxillary anterior teeth from canine-to-canine and bonded canine-to-canine retainer in the lower arch (group V-CTC); maxillary VFR combined with stripping of the lower anterior teeth (group V-S); prefabricated positioner covering all erupted teeth in the maxilla and the mandible (group P). All retention appliances were provided within one hour of debonding.
Outcome measure
Dental study casts were taken before treatment, at appliance removal and five years or more out of retention. Little's irregularity index, intercanine and intermolar width, arch length and overbite/overjet were recorded.
Results
Twenty-five patients were randomised to each group with 69 completing the two-year retention period (24 in V-CTC group; 23 in V-S group; 22 in P group). Forty-nine patients were available five years post retention (16 in V-CTC group; 17 in V-S group; 16 in P group). No significant differences were found between the groups.
Conclusions
After five years or more out of retention, the three retention methods had achieved equally favourable clinical results. Thus a maxillary VFR combined with a bonded canine-to-canine retainer in the mandible, a maxillary VFR combined with stripping of the mandibular anterior teeth and a prefabricated positioner can all be recommended.
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References
Horowitz SL, Hixon EH . Physiologic recovery following orthodontic treatment. Am J Orthod 1969; 55: 1–4.
Little RM, Riedel RA, Artun J . An evaluation of changes in mandibular anterior alignment from 10 to 20 years postretention. Am J Orthod Dentofacial Orthop 1988; 93: 423–428.
Bolla E, Cozzani M, Doldo T, Fontana M . Failure evaluation after a 6-year retention period: a comparison between glass fiber-reinforced (GFR) and multistranded bonded retainers. Int Orthod 2012: 10: 16–28.
Littlewood SJ, Millett DT, Doubleday B, Bearn DR, Worthington HV . Retention procedures for stabilising tooth position after treatment with orthodontic braces. Cochrane Database Syst Rev 2016; 1: CD002283. doi: 10.1002/14651858.CD002283.pub4.
Iliadi A, Kloukos D, Gkantidis N, Katsaros C, Pandis N . Failure of fixed orthodontic retainers: A systematic review. J Dent 2015; 43: 876–896.
Littlewood SJ, Millett DT, Doubleday B, Bearn DR, Worthington HV . Retention procedures for stabilising tooth position after treatment with orthodontic braces. Cochrane Database Syst Rev 2006; 1: CD 002283.
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Authors and Affiliations
Additional information
Address for correspondence: Gudrun Edman Tynelius, Harvigslund Stubbarp 112, S-274 91 Skurup, Sweden. E-mail: gudrunedmantynelius@gmail.com
Edman Tynelius G, Petrén S, Bondemark L, Lilja-Karlander E. Five-year postretention outcomes of three retention methods – a randomized controlled trial. Eur J Orthod 2015; 37: 345–353.
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Cope, J., Lamont, T. Orthodontic retention – three methods trialed. Evid Based Dent 17, 29–30 (2016). https://doi.org/10.1038/sj.ebd.6401157
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DOI: https://doi.org/10.1038/sj.ebd.6401157
