27 RCTs were identified for this Cochrane review update early v late orthodontic treatment for class II div 1 malocclusion. The main advantage of early treatment was a reduction of incisal trauma.
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This Cochrane review of orthodontic treatment for class II div 2 malocclusion updates the previous 2006 version. No RCTs or CCTs were identified so It is not possible to provide any evidence-based guidance to recommend or discourage any type of orthodontic treatment to correct Class II division 2 malocclusion in children.
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This review looked at the impact of premolar extraction on soft tissue profile in class II division 1 malocclusions. 13 studies were included the majority being retrospective. There is some evidence to suggest an increase in the nasolabial angle but the quality is limited.
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Factors affecting relapse after treatment of class II malocclusion was investigated in this review. Only 17 retrospected studies met the review criteria providing limited evidence to support the influence of factors predictive of sagittal stability following orthodontic treatment.
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This review looked at the efficacy of fixed and removable functional appliances for the treatment of class II malocclusion. Just 4 trials were identified 2 of which were randomised. Limited evidence found fixed and removable functional appliances are effective in reducing overjet in children but there is little evidence to differentiate the approaches.
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