This review assessing the prevalence of failure of both maxillary and mandibular fixed orthodontic bonded retainers (FOBRs) included 34 studies. The findings incicate an overall failure rate of 28.17% (23.19 to 33.15%) based on 31 studies. However the certainty of the evidence was very low to low so the findings should be interpreted cautiously.
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This Cochrane review update evaluating different retention strategies used to stabilise tooth position after orthodontic braces included 47 RCTs. However, only 11 RCTs were at low risk of bias and the overall assessment of the certainty of the evidence is low to very low which means that firm recommendations on orthodontic retention strategies cannot be made.
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While 24 studies were included in this review of the impact of orthodontic retainers on periodontal health there was a lack of high quality evidence to support any particular retainer on this or a range of other parameters. More well-designed and long terms studies are required.
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This review focused on lingual orthodontic retention including 27 studies (9 RCTs; 6 prospective and 12 retrospective studies). However, the quality of evidence was low, providing little evidence for the best treatment protocols.
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The paper reports the finding of a small trial of three type of orthodontic retention 5 years or more post retention and finds no difference. Previously the authors reported their findings after two years of retention again showing no differences.
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