brackets slide. friction.orthodontics self ligating brackets ligation wires class ii subdivision pre molars review of literature pre treatment andpost treatment. extractions study models space closure arm of couple leveling and aligning anchorage. couple translation moment tipping force of moment force torque anna hopkins. extraction pliers merrifield tweed angle swain occlusion orthodontic bands cements. bonding bond failure white spot lesions bodily movement. non-extraction tipping movement molar distalization distal jet appliance pendulum appliance bimpler functional regulator haupl functional appliances activator
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