T loop mechanics for effective space closure in bimaxillary dentoalveolar protrusion - A case report

This case report intends to highlight the space closure with continuous T-loop mechanics for bimaxillary protrusion. Loops can be fabricated in a sectional or full arch wire, and closing loops are usually used in loop mechanics for extraction space closure. The major advantage of loop mechanics is the lack of friction between the bracket and arch wire during space closure. A 21-year old adult male patient with bimaxillary protrusion and spacing reported to the clinic. The patient was treated successfully by maximum retraction of maxillary and mandibular anterior teeth after extraction of all first premolars. Space closure was achieved using a moment differential between posterior and anterior segments created by a T-loop. A stable result with normal over jet and overbite was achieved with retraction of maxillary and mandibular anterior teeth and no loss of anchorage.