KMID : 0361920100400050304
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Korean Journal of Orthodontics 2010 Volume.40 No. 5 p.304 ~ p.313
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Comparisons of occlusal force according to occlusal relationship, skeletal pattern, age and gender in Koreans
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Choi Yoon-Jeong Kim Kyung-Ho Chung Choo-Ryung
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Abstract
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Objective: The aim of this study was to evaluate the occlusal force and contact area and to find its associating
factors in Koreans.
Methods: Occlusal force and contact area in maximum intercuspation were measured using
the Dental Prescale¨Þ system in 651 subjects (15 with normal occlusion, 636 with various malocclusions divided
into subgroups according to the skeletal pattern, Angle¡¯s molar relationship, age and gender).
Results: Occlusal force of the normal occlusion group (744.5 ¡¾ 262.6 N) was significantly higher than those of the malocclusion group (439.0 ¡¾ 229.9 N, p £¼ 0.05). Occlusal force was similar regardless of differences in ANB angle or Angle¡¯s molar classification, however the increase in vertical dimension significantly reduced occlusal force (p £¼ 0.05).
Conclusions: Occlusal force was significantly lower in the malocclusion group compared to the normal occlusion
group, and in females compared to males, but it was not affected by age, antero-posterior skeletal pattern or molar classification. Although a hyperdivergent facial pattern indicated lower occlusal force compared to a hypodivergent facial pattern, the differences in skeletal pattern were not the primary cause of its decrease, but a secondary result induced by the differences in occlusal contact area according to the facial pattern.
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KEYWORD
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Occlusal force, Contact area, Maxillofacial skeletal pattern
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