How changes in the occlusal plane relate to craniofacial growth and development : Skeletal 2 patterns

概要

論文の詳細を見る
A thorough understanding of dentofacial growth is indispensable for treatment of children with skeletal malocclusion. We did a longitudinal study to assess changes in the posterior face, dentoalveolar area and occlusal plane in school children with untreated skeletal maxillary protrusion. Lateral cephalograms were obtained for 16 boys and 10 girls in the second grade of elementary school (mean age 7 years 8 months) who exhibited skeletal maxillary protrusion with an ANB angle greater than 5.5 degrees. Analysis indicated that their OM angle (the angle between the occlusal plane and the mandibular plane) was on average 2.5 degrees greater than normal. Four of the 26 children had an apparent increase in the OM angle that ranged from 2.3 to 3.4 degrees. There was no indication that this increase in the OM angle correlated with changes in the SNA, SNB or ANB angles measured in the children during the second and sixth grades. The increase, however, did correlate with growth of the mandibular ramus. These findings indicated that growth of the dentofacial profile in school children, in particular vertical growth of the mandibular ramus and molar region, has significant influence on lower face morphology. The occlusal plane also had a strong influence.
大阪歯科学会の論文