1. The document describes the Begg orthodontic appliance and treatment methodology. It discusses the history and philosophy of Begg, the features of the appliance, and outlines the objectives and mechanics of the three stages of Begg treatment. 2. Stage I focuses on intra-arch alignment and leveling as well as overcorrection of overbite and overjet. Light class II elastics are used. Stage II aims to maintain stage I results while closing extraction spaces and correcting dental asymmetries using heavier elastics. 3. Stage III involves uprighting and torquing springs to correct tipping and torque. Uprighting springs may be needed to prevent opening of extraction spaces during torqueing. Finishing