The effects of fixed and removable orthodontic retainers: a systematic review.

Al-Moghrabi, Dalya; Pandis, Nikolaos; Fleming, Padhraig S (2016). The effects of fixed and removable orthodontic retainers: a systematic review. Progress in orthodontics, 17(1), p. 24. Springer 10.1186/s40510-016-0137-x

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OBJECTIVE In the view of the widespread acceptance of indefinite retention, it is important to determine the effects of fixed and removable orthodontic retainers on periodontal health, survival and failure rates of retainers, cost-effectiveness, and impact of orthodontic retainers on patient-reported outcomes. METHODS A comprehensive literature search was undertaken based on a defined electronic and gray literature search strategy ( PROSPERO CRD42015029169). The following databases were searched (up to October 2015); MEDLINE via OVID, PubMed, the Cochrane Central Register of Controlled Trials, LILACS, BBO, ClinicalTrials.gov, the National Research Register, and ProQuest Dissertation and Thesis database. Randomized and non-randomized controlled clinical trials, prospective cohort studies, and case series (minimum sample size of 20) with minimum follow-up periods of 6 months reporting periodontal health, survival and failure rates of retainers, cost-effectiveness, and impact of orthodontic retainers on patient-reported outcomes were identified. The Cochrane Collaboration's Risk of Bias tool and Newcastle-Ottawa Scale were used to assess the quality of included trials. RESULTS Twenty-four studies were identified, 18 randomized controlled trials and 6 prospective cohort studies. Of these, only 16 were deemed to be of high quality. Meta-analysis was unfeasible due to considerable clinical heterogeneity and variations in outcome measures. The mean failure risk for mandibular stainless steel fixed retainers bonded from canine to canine was 0.29 (95 % confidence interval [CI] 0.26, 0.33) and for those bonded to canines only was 0.25 (95 % CI: 0.16, 0.33). A meta-regression suggested that failure of fixed stainless steel mandibular retainers was not directly related to the period elapsed since placement (P = 0.938). CONCLUSION Further well-designed prospective studies are needed to elucidate the benefits and potential harms associated with orthodontic retainers.

Item Type:

Journal Article (Review Article)

Division/Institute:

04 Faculty of Medicine > School of Dental Medicine > Department of Orthodontics

UniBE Contributor:

Pandis, Nikolaos

Subjects:

600 Technology > 610 Medicine & health

ISSN:

2196-1042

Publisher:

Springer

Language:

English

Submitter:

Eveline Carmen Schuler

Date Deposited:

16 Feb 2017 10:38

Last Modified:

06 Oct 2017 10:57

Publisher DOI:

10.1186/s40510-016-0137-x

PubMed ID:

27459974

Uncontrolled Keywords:

Cost-effectiveness, Failure rate, Orthodontic retainer, Patient-reported outcomes, Periodontal, Survival rate

BORIS DOI:

10.7892/boris.94259

URI:

https://boris.unibe.ch/id/eprint/94259

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