성장기 하악골 열성장 환자의 Berlin standard activator를 이용한 부정교합 치료: 증례보고
Berlin standard activator in the treatment of growing patients with mandibular deficiency: Case report
이승엽,
소속 상세정보
이승엽 ( Lee Seung-Youp ) - 강릉원주대학교 치과대학 치과교정학교실
KMID : 0362720100480110819
Abstract
Activator is a removable functional appliance used for correcting the skeletal Class II malocclusion in children with the mandibular deficiency. Berlin standard activator modified from Andresen activator has following characters; do not cover the palatal surface for tongue space, relief on lingual surface of mandibular incisors and resin capping 1/3-1/2 of crown height on mandibular incisors for preventing labioversion of mandibular incisors, L-hook between maxillary lateral incisor and canine for anterior high pull headgear, relief on mandibular posterior bite block for differential eruption of posterior teeth. Two cases presented here had a mandibular deficiency and slight maxillary protrusion. First case (an 11-year-old girl) treated with Berlin standard activator and anterior high pull headgear for 13 months followed by fixed orthodontic appliance for another 29 months. Second case (a 12-year-old boy) treated with Berlin standard activator for 6 months followed by fixed appliance for another 24 months. Treatment results showed a significant improvement in sagittal skeletal and occlusal relationship without premolar extraction. Mandibular condyles were concentric in TMJ fossa, and masticatory muscle activities were normalized after treatment. In the retention period facial harmony and occlusal stability was maintained.
키워드
Class II; Activator; Headgear; Mandibular deficiency; Mandibular growth
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