Long Term Results of Premolar Extractions in Orthodontic Treatment

Abstract

An assessment of the long-term results of a series of first and second premolar extractions. First premolar extractions produced a higher proportion of satisfactory upper contacts and buccal occlusions, but second premolar extractions, were more often associated with space closure. Approximately 40 per cent of lower contacts were unsatisfactory. There was little difference between the premolars in this or with regard to residual lower incisor crowding. No association between the presence of third molars and space closure was found.