How changes in the occlusal plane relate to craniofacial growth and development : Skeletal 1 patterns

概要

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We studied how changes in the occlusal plane of elementary school students affect growth and development. Lateral cephalograms were exposed of 16 male and 19 female Japanese elementary school children in the second and sixth grades. The subjects selected were all in Hellman's developmental stages IIC-IIIC at the time they were in the second grade, and had an ANB angle between 2 and 5.5 degrees. The angle formed by the occlusal plane and the mandibular plane (the OM angle) increased an average of 3.5 degrees during the four years. Twenty-eight of the 35 students had an increase in the OM angle, four showed a decrease, and three were essentially unchanged. In the majority of students who showed an increase, the total alveolar vertical growth of the mandibular incisors and maxillary molars was greater than the total alveolar vertical growth of the maxillary incisors and mandibular molars. In 23 of the 28 students who showed an increase in the OM angle, the ANB angle either decreased or remained essentially unchanged. These results suggest that changes in the occlusal plane affect craniofacial growth.
大阪歯科学会の論文