Effect of Premature Loss of Deciduous Canines and Molars on Malocclusion of the Permanent Dentition

There was a significantly increased frequency of orthodontic treatment among those with the premature loss of one or more deciduous teeth. Of those with no history of orthodontic treatment, there was a significant effect of the premature loss of molars but not canines on malalignment. Anterior crowding was related only to the premature extraction of canines.