PFE and ankylosis as a cause of disturbances in teeth eruption

The correct tooth eruption is a key process in the development of occlusion and the stomatognathic system. Despite many studies tooth eruption mechanism is still not fully known process. Tooth eruption failure may be caused by various factors, general and local. Incorrect tooth eruption can be caused by Primary Failure of Eruption(PFE) or ankylosis. The observation that PFE can occur in families suggests that the development disturbances leading to PFE are heritable. PFE may affect only the lateral teeth and includes all distal teeth positioned relative to the tooth with known PFE. Primary Failure of Eruption and ankylosis are very rare problems, most likely genetic etiology. In proper diagnostics of these diseases radiological examinations such as pantomography and computer tomography are helpful. Ankylosis in radiological imaging is revealed as a visible disruption of periodontal fissure. The distinction between PFE and ankylosis is clinically important because PFE affected teeth do not respond to orthodontic treatment and when orthodontic force is applied these teeth can become ankylosed.