Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Randomized Controlled Trial
. 2013 Sep 11:14:25.
doi: 10.1186/2196-1042-14-25.

Comparison of survival time between two types of orthodontic fixed retainer: a prospective randomized clinical trial

Parisa Salehi  1 , Hooman Zarif Najafi, Seyyed Mehdi Roeinpeikar
Affiliations
Randomized Controlled Trial

Comparison of survival time between two types of orthodontic fixed retainer: a prospective randomized clinical trial

Parisa Salehi et al. Prog Orthod. .

Abstract

Background: The aim of this prospective clinical study was to compare the mean durability and the failure rates of two types of orthodontic retainers.

Methods: Orthodontic patients (142) aged between 14 and 28 years were recruited in this study. The polyethylene woven ribbon (Ribbond, Seattle, WA, USA) retainer was compared with a 0.0175-in flexible spiral wire (Respond, Ormco, Glendora, CA, USA) retainer. When treatment was completed, the retainers were bonded from canine to canine in the maxillary and the mandibular arches of the participants. In the follow-up visits, the patients were re-evaluated every 3 months over a period of 18 months. The time taken for the retainers to remain without any fracture was appraised. Kaplan-Meier analysis and the logrank test were employed to identify significant differences in the survival functions between the groups. The rates of the retainers' failure between the groups were analyzed using Chi-square test.

Results: It was revealed that the mean survival of the flexible spiral wire retainer was 15.34±0.47 and 15.60±0.42 months in the maxillary and mandibular arches, respectively. The mean survival of the ribbon retainer was 13.95±0.55 and 14.26±0.57 months in the maxillary and mandibular arches, respectively. Ribbon retainers showed a failure rate of 50% in the maxillary and 42.6% in the mandibular arches. Flexible spiral retainers showed a failure rate of 36.5% in the maxillary and 37.8% in the mandibular arches. The differences were not statistically significant. Regarding the evaluation period, the differences had limited clinical significance.

Conclusion: The mean survival time and the failure rates of the polyethylene woven ribbon retainer were comparable to the flexible spiral wire retainer during the 18 months after orthodontic treatment.

PubMed Disclaimer

Figures

Figure 1
Figure 1
CONSORT flow diagram.
Figure 2
Figure 2
Kaplan-Meier survival plot of the multi-stranded and ribbon retainer in the maxillary arch.
Figure 3
Figure 3
Kaplan-Meier survival plot of the multi-stranded and ribbon retainer in the mandibular arch.
See this image and copyright information in PMC

Similar articles

See all similar articles

Cited by

See all "Cited by" articles

References

    1. Little RM, Wallen TR, Riedel RA. Stability and relapse of mandibular anterior alignment—first premolar extraction cases treated by traditional edgewise orthodontics. Am J Orthod. 1981;80:349–65. doi: 10.1016/0002-9416(81)90171-8. - DOI - PubMed
    1. Little RM, Riedel RA, Årtun J. An evaluation of changes in mandibular anterior alignment from 10 to 20 years postretention. Am J Orthod Dentofacial Orthop. 1988;93:423–28. doi: 10.1016/0889-5406(88)90102-3. - DOI - PubMed
    1. Uhde MD, Sadowsky C, BeGole EA. Long-term stability of dental relationships after orthodontic treatment. Angle Orthod. 1983;53:240–52. - PubMed
    1. Sadowsky C, Schneider BJ, BeGole EA, Tahir E. Long-term stability after orthodontic treatment: nonextraction with prolonged retention. Am J Orthod Dentofacial Orthop. 1994;106:243–49. doi: 10.1016/S0889-5406(94)70043-5. - DOI - PubMed
    1. Parker WS. Retention-retainers may be forever. Am J Orthod Dentofacial Orthop. 1989;95:505–13. doi: 10.1016/0889-5406(89)90414-9. - DOI - PubMed

Publication types

MeSH terms

LinkOut - more resources