[Pathogenesis of infraclusions]

Any case of infraclusion should be considered to be a defect of the vertical adaptation of the dental system, i.e. as a local alveolar disturbance. Two types of pathogenesis can be proposed: an interposition between the dental arches of an obstacle which prevents the egression of the teeth and, the lesser known pathogenesis, the pressure exerted simultaneously on the vestibular and lingual surfaces of the incisors can, because of the oblique surface of contact, result in a system of forces which results in the arrest of dental eruption.