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Cephalometric configuration of the occlusal plane in patients with anterior open bite

 Yoon Jeong Choi  ;  Dong Jae Kim  ;  Jaewook Nam  ;  Chooryung J. Chung  ;  Kyung-Ho Kime 
 American Journal of Orthodontics and Dentofacial Orthopedics, Vol.149(3) : 391-400, 2016 
Journal Title
 American Journal of Orthodontics and Dentofacial Orthopedics 
Issue Date
Adult ; Alveolar Process/pathology ; Anatomic Landmarks/pathology ; Bicuspid/pathology ; Cephalometry/methods* ; Cephalometry/statistics & numerical data ; Cluster Analysis ; Cuspid/pathology ; Dental Arch/pathology ; Dental Occlusion ; Female ; Humans ; Image Processing, Computer-Assisted/methods ; Incisor/pathology ; Male ; Mandible/pathology ; Molar/pathology ; Open Bite/pathology* ; Palate/pathology ; Tooth Crown/pathology* ; Young Adult
INTRODUCTION: This study was performed to investigate the cephalometric configuration of the occlusal plane in patients with anterior open bite. METHODS: Of 61 subjects with open bite (overbite ≥3.75 mm) who had been recruited consecutively from January 2006 to November 2013 and had no history of orthodontic treatment, 14 cephalometric landmarks indicating the incisal edge or the buccal or mesiobuccal cusp tips of each tooth were used for K-means clustering to classify the occlusal plane configuration. For the open-bite group and a control group with normal occlusion (n = 38), dentoalveolar height, which is the perpendicular distance of each tooth to the palatal or mandibular plane, was compared among the clusters and between the 2 groups. RESULTS: The open-bite subjects were divided into 2 clusters according to occlusal contact of the premolars: Y-form and V-form (with and without premolar contact, respectively). The normalized dentoalveolar heights of the 4 mandibular teeth (lateral incisor to second premolar) were significantly greater in the Y-form class than in the V-form class. The dentoalveolar heights of the 5 maxillary teeth (lateral incisor to first molar) were significantly greater in the open-bite group than in the control group. CONCLUSIONS: For anterior open-bite treatment, the cephalometric configuration of the occlusal plane should be considered based on the occlusal contacts of the premolars.
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2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyung Ho(김경호) ORCID logo https://orcid.org/0000-0002-8154-2041
Chung, Chooryung J.(정주령) ORCID logo https://orcid.org/0000-0001-9399-7193
Choi, Yoon Jeong(최윤정) ORCID logo https://orcid.org/0000-0003-0781-8836
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