THE JOURNAL OF THE TOKYO DENTAL COLLEGE SOCIETY

Vol. 108 No. 2      April 2008

ISSN: 0037-3710      UBIC: 342-J

ABSTRACT

Posterior open bite has several possible causes. including primary failure of eruption (PFE). Primary failure of eruption is a rare condition where there is eruption failure with no obvious cause. First and second molar teeth are most commonly affected. Affected teeth will not respond to orthodontic force. Therapy of patients with this condition is extremely difficult. Two methods of moving unerupted teeth into occlusion have been reported: to reposition them surgically by small segment alveolar osteotomy or reconstruction of occlusion by prosthetic treatment. This clinical report describes a case of primary failure of eruption with mandibular prognathism. The patient underwent a Le Fort I osteotomy and sagittal split ramus osteotomy. The occlusal plane was controlled by orthodontic surgery. A good occlusion and facial esthetics were achieved, and these results have been maintained for one year after completion of active treatment. This case report shows the effectiveness of reconstruction of the occlusal plane by orthognathic surgery in PFE. (The Shikwa Gakuho, 108 :143-152. 2008) Key words: primary failure of tooth eruption, orthognathic surgery, posterior open bite.

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