Orthodontic management of a bimaxillary protrusion malocclusion using a continuous T-loop archwire

Abstract

Bimaxillary protrusion, which is characterised by proclined and protrusive upper and lower incisors, was identified early in the orthodontic profession as a highly unfavourable result of non-extraction treatment. Indeed, it is likely that Charles Tweed's legendary standing in our specialty stems from his effective treatment of bimaxillary protrusion and the subsequent improvements in face aesthetics. The treatment of a young woman with a significant bimaxillary protrusion is described in this case report. To minimise lip procumbency, four first premolars were removed, followed by the en-masse retraction and torque control of upper and lower anterior teeth using a continuous T-Loop archwire. The patient's facial aesthetics improved dramatically. Lip eversion and dentoalveolar protrusion were greatly improved, as was considerable retraction of the upper and lower lips. Mentalis strain was reduced when the lips were retracted, which enhanced chin projection. The dental proclination and facial esthetics were substantially improved.