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Am J Orthod Dentofacial Orthop. 2009 Sep;136(3):318.e1-9; discussion 318-9. doi: 10.1016/j.ajodo.2009.02.017.

Oropharyngeal airway in children with Class III malocclusion evaluated by cone-beam computed tomography.

Author information

1
Research associate, Developmental Medicine, Health Research Course, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan. yamame@dentb.hal.kagoshima-u.ac.jp

Abstract

INTRODUCTION:

Upper airway size is increasingly recognized as an important factor in malocclusion. However, children with Class III malocclusion are somewhat neglected compared with those with a Class II skeletal pattern. Therefore, the purpose of this study was to establish the characteristic shape of the oropharyngeal airway (OA) in children with Class III malocclusion.

METHODS:

The sample comprised 45 children (average age, 8.6 +/- 1.0 years) divided into 2 groups: 25 with Class I and 20 with Class III malocclusions. OA size of each group was evaluated by cone-beam computed tomography. Cluster analysis, based on OA shape, redivided the subjects into wide, square, and long types. The distributions of Class I and Class III subjects were compared among the types.

RESULTS:

The Class III group showed statistically larger OA area and width compared with the Class I group. Area was positively correlated with Class III severity. The square type included 84% of the Class I malocclusions but only 30% of the Class III malocclusions, indicating that the OA in Class III malocclusion tends to be flat.

CONCLUSIONS:

The Class III malocclusion is associated with a large and flat OA compared with the Class I malocclusion.

PMID:
19732662
DOI:
10.1016/j.ajodo.2009.02.017
[Indexed for MEDLINE]
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