Orthodontic space closure – en masse or two-step retraction

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8 small studies were included in this review comparing en masse retraction and two-step retraction for orthodontic space closure. While both were effective the en masse/miniscrew combination demonstrated a small statistically significant benefit in terms of incisor retraction and anchorage preservation.

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Orthodontic space closure – Springs or chains?

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4 RCTs were included in this review of Nickel- titanium closing springs (NiTi-CS) and elastomeric power chains (EPC). The findings suggest there is medium quality evidence that space closure is faster with NiTi-CS.

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Mini-screw implants for orthodontic anchorage

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14 studies, 7 of which were RCTs were included in this review of min-screw implants to prevent anchorage loss during orthodontic treatment. The findings suggest a small but clinically important reducing in anchorage with mini-screw use. However more high quality studies and information on adverse effects is needed.

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Lingual fixed orthodontic appliances: insufficient evidence of effectiveness

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11 studies were identified for this review of lingual fixed orthodontic appliances. while some benefits were suggested the quality of the available studies was very low providing insufficient evidence of the effectiveness of lingual appliances.

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