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KMID : 0361919910210020367
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Korean Journal of Orthodontics
1991 Volume.21 No. 2 p.367 ~ p.397
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A STUDY ON THE OCCLUSAL PLANE INCLINATION IN LATERAL CEPHALOGRAPH
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Abstract
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This study was aimed to investigate the occiusal plane inclination in relation to the skeletal and dental assessment measurements in order to provide a reference in orthodontic treatment planning as the occiusal plane should be reconstructed orthodontically or gnathologically.
The sample consisted of 73 normal occlusions and 113 malocclusions of adults. The computerized statistical analysis of 38 occlusal plane´s and 29 skeletal and dental measurements were carried out with SPSS.
The conclusions were as follows;
1. In normal occlus.on, COP NaPog was average 83.63° (2.44) and occiusal plane inclination had a strong negative correlation with SNB and FH-NaPog.
2. In normal occlusion, :ArANS plane was nearly parallel to the occiusal plane.
3. In malocclusion, the larger the mandibular plane angle and the shorter the ramus height was,
the more downward the occiusal plane had a tendency to tip anteriorly.
4. Occlusal plane was more horizontal in deep bite group, while it was steeper in openbite group. 5. The curve of Spee was severe in deep bite group but in openbite group mandibular occiusal
plane showed average reverse curvature, where it was found that the configuration of the
occlusal plane contributed to the excess or deficiency of anterior overbite.
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