Many authors such as Morgenstern, ROse, Ahrens and N or b e r g have reported about the origin of the permanent tooth germs but the later development of this dentition has not been well illustrated. And there are few, if any, detailed studies concerning the position changes during development of permanent tooth germs. The present author previously (1957) postulated that deciduous tooth germs or...

INTRODUCTION Our aim was to investigate the effect of rapid maxillary expansion and transpalatal arch therapy combined with deciduous canine extraction on the eruption rate of palatally displaced canines (PDCs) in patients in the late mixed dentition in a 2-center prospective study. METHODS Seventy subjects were enrolled based on PDCs diagnosed on panoramic radiographs. The treatment group (T...

INTRODUCTION This retrospective cephalometric study analyzed the influence of intentional ankylosis of deciduous canines in patients with Class III malocclusion and anterior crossbite, in the deciduous and early mixed dentition stages, treated by orthopedic maxillary expansion followed by maxillary protraction. METHODS Lateral cephalograms of 40 patients were used, divided in 2 groups paired ...

Introduction Supernumerary teeth may be defined as extra teeth occurring within the dental arch. These teeth may be found within the deciduous dentition, but are more commonly found within the permanent dentition. The prevalence of supernumerary teeth in the permanent dentition has been investigated in several studies (Table 1); it varies from 0.45% to 4.5%. In Ireland the levels vary between 2...