성인에서 Hyrax 장치로 완속상악확장하여 폭경부조화를 개선한 증례
Correction of Transverse Discrepancy with Slowly Maxillary Expansion by Hyrax type expander in Adult Patient
곽경호, 김성식, 김용일, 박수병, 손우성,
소속 상세정보
곽경호 ( Kwak Kyoung-Ho ) - 부산대학교 치의학전문대학원 치과교정학교실
김성식 ( Kim Seong-Sik ) - 부산대학교 치의학전문대학원 치과교정학교실
김용일 ( Kim Yong-Il ) - 부산대학교 치의학전문대학원 치과교정학교실
박수병 ( Park Soo-Byung ) - 부산대학교 치의학전문대학원 치과교정학교실
손우성 ( Son Woo-Sung ) - 부산대학교 치의학전문대학원 치과교정학교실
KMID : 0362720170550060400
Abstract
Approximately 30% of adult patients who want orthodontic treatment have transverse discrepancy with insufficient width of the maxilla. Particularly, in Class III patients requiring orthognathic surgery, the frequency of insufficient width of the maxillary arch related to respiratory problems is high. We report a case of non-surgical maxillary expansion using a Hyrax type expander with an orthognathic surgery, based on the reports that the ratio of non-fused midpalatal suture is not high in adults. A 30 years and 2 months old woman with a long face showed an Angle Class III with a vertical growth pattern. Class III molar and canine relation, anterior edge bite, and mandibular incisor compensatory lingual inclination were observed. The posterior buccal overjet seemed to be appropriate, but I diagnosed that there was a transverse discrepancy, for the following reasons. The inter-canine and inter-molar widths were sufficient but excessive lingual inclination of the mandibular molars was observed when assessing the bucco-lingual inclination based on the center of resistance of the maxillary and mandibular first molar. For this reason, it was expected that intercuspal interference would occur during orthodontic decompensation. Therefore, slow maxillary expansion using Hyrax type expander was performed and 2-jaw rotation surgery was performed to improve aesthetic and occlusion. Adults can also improve width discrepancy by non-surgical methods, which can avoid SARPE requiring additional surgery or segmental surgery lacking stability and predictability.
키워드
Maxillary expansion; Hyrax; Adult
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