Harris, AngelaJulyan, Johan Christian2018-09-042024-06-042018-12-312024-06-042018https://hdl.handle.net/10566/15877Magister Scientiae Dentium - MSc(Dent) (Orthodontics)Orthodontic treatment has the ability to improve the aesthetics and the function of patients. In order to create space, orthodontic treatment often requires removal of teeth. The most common teeth removed for orthodontic treatment are the premolars. It has become popular to remove second premolars in certain cases where the soft tissue profile should not be altered. The Damon self-ligating orthodontic system is renowned for not requiring dental extractions in the majority of cases. The effect of extractions on the soft tissue profile of patients, in conjunction with using the Damon system, has therefore not been researched. It is important to understand the effect that orthodontic treatment and extractions can have on the soft tissue profile of patients. This effect can accurately be determined by making use of the soft tissue cephalometric analysis, developed by Dr Reed A. Holdaway in 1983.enOrthodontic treatment, Soft tissue profile changes, Premolar extractions, Second premolar extraction, Non - extraction, Cephalometric analysis, Damon System, Self-ligating brackets, Fixed appliance, Holdaway soft tissue analysisUniversity of the Western Cape