Targeted presurgical decompensation in patients with yaw-dependent facial asymmetry
김경아, 이지원, 박정호, 김병호, 안효원, 김수정,
소속 상세정보
김경아 ( Kim Kyung-A ) - Kyung Hee University School of Dentistry Department of Orthodontics
이지원 ( Lee Ji-Won ) - Kyung Hee University Graduate School Department of Dentistry
박정호 ( Park Jeong-Ho ) - Kyung Hee University Graduate School Department of Dentistry
김병호 ( Kim Byoung-Ho ) - Seoul National University School of Dentistry Department of Orthodontics
안효원 ( Ahn Hyo-Won ) - Kyung Hee University School of Dentistry Department of Orthodontics
김수정 ( Kim Su-Jung ) - Kyung Hee University School of Dentistry Department of Orthodontics
KMID : 0361920170470030195
Abstract
Facial asymmetry can be classified into the rolling-dominant type (R-type), translation-dominant type (T-type), yawing-dominant type (Y-type), and atypical type (A-type) based on the distorted skeletal components that cause canting, translation, and yawing of the maxilla and/or mandible. Each facial asymmetry type represents dentoalveolar compensations in three dimensions that correspond to the main skeletal discrepancies. To obtain sufficient surgical correction, it is necessary to analyze the main skeletal discrepancies contributing to the facial asymmetry and then the skeletal-dental relationships in the maxilla and mandible separately. Particularly in cases of facial asymmetry accompanied by mandibular yawing, it is not simple to establish pre-surgical goals of tooth movement since chin deviation and posterior gonial prominence can be either aggravated or compromised according to the direction of mandibular yawing. Thus, strategic dentoalveolar decompensations targeting the real basal skeletal discrepancies should be performed during presurgical orthodontic treatment to allow for sufficient skeletal correction with stability. In this report, we document targeted decompensation of two asymmetry patients focusing on more complicated yaw-dependent types than others: Y-type and A-type. This may suggest a clinical guideline on the targeted decompensation in patient with different types of facial asymmetries.
키워드
Facial asymmetry; Decompensation; Orthognathic surgery; Mandi-bular yaw
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