This Cochrane review update of interceptive procedures included 4 RCTs to promote the eruption of palatally displaced permanent canines (PDCs) involving a total of 199 patients. The findings indicate that extraction of the primary canine man increase the the proportion of erupted PDCs but the evidence is very uncertain.
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This review of orthodontic procedures for the management of displaced permanent canines in the mixed dentition. 5 RCTs, all at high risk of bias were identified with treatment comparisons being mainly based on single studies.
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This review evaluating the difference in stability between lower fixed retainers bonded on all six anterior teeth and those bonded only to the canines included 5 studies. Only 2 of the studies were RCTs with finding suggesting better outcomes with bonding to all anterior teeth but the quality of the evidence is low.
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This review of the effects of micro-osteoperforation on the rate of tooth movement in patients undergoing orthodontic treatment included 6 RCTs. Although meta-analysis found a small statistical benefit in favour of micro-osteoperforation in the short term the clinical benefits particularly over the duration of a course of treatment remain unclear.
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Two surgical approaches ( open and closed) for palatally displaced canines were compared in this multi-centre RCT. No differences in operating time was seen between the two approaches but those in the open group had more pain.
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This review of canine autotransplantation included 6 low quality studies are suggests good survival although both resorption and ankylosis increase after 5 years
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8 studies were included in this review of vibrational stimulus to accelerate orthodontic treatment. The studies were small and of short duration providing very low quality evidence to support any effect. Further high quality studies of longer duration are needed.
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This review comparing cone-beam computed tomography (CBCT) and conventional radiography (CR) for localising impacted canines included 8 mainly cross-sectional studies and suggests that CBCT is more accurate. However the quality of the studies is low and further research is needed.
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This updated Cochrane review comparing open v closed surgical approaches for palatally displaced canines includes 3 studies involving 146 patients with the available evidence suggesting that neither surgical technique for exposing canine teeth is superior.
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4 RCTs were included in this review of interceptive primary canine extraction. They provide some limited evidence that extractions may facilitate permanent canine eruption but the study quality is low.
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