구내 장치 종류에 따른 facemask의 효과 비교 : bonded expander와 Hyrax
Facemask Effects in Two Types of Intraoral Appliances : Bonded Expander vs. Hyrax
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초록
본 연구의 목적은 3급 부정교합 환자에서 facemask를 이용한 악정형치료 시, 고정원으로 사용하기 위해 장착되는 구내 장치의 종류에 따른 효과를 비교하는 것이다. 3급 부정교합 환자 18명을 대상으로 악정형치료를 평균 12개월 동안 시행하였으며, 이 중 9명은 구내 장치로 bonded expander를, 9명은 Hyrax를 사용하였다. 치료 시작 전, 그리고 치료 직후에 측면 두부방사선사진을 촬영하여 비교 분석하였다. 또한 고정원 소실 정도를 조사하고, 장치에 따른 차이를 비교하였다. 악정형치료효과에서는 두 군 모두 뚜렷한 개선을 보였고, 군간의 유의한 차이는 없었다. 각 구내 장치 모두 어느 정도의 고정원 소실량은 존재하였지만 군간의 차이는 없었다. Facemask는 성장기 3급 부정교합 환자의 치료에 있어서 효과적인 치료 방법이며, 구내 장치로 사용된 bondedexpander와 Hyrax 간에 유의한 차이는 없었다.
Abstract
The purpose of this study was to compare and evaluate facemask effects when two types of intraoralappliances were used for maxillary protraction for patients with class III malocclusion. Eighteen patients withclass III malocclusion were treated with a facemask for an average of 12 months. Two types of intraoralappliances were used: nine patients were treated with bonded expander (Group 1), and nine patients withHyrax (Group 2). Cephalometric radiographs were taken before and after treatment. Cephalometric radiographswere traced, analyzed, and the results such as sagittal, vertical and soft-tissue changes were compared betweentwo groups. The amount of anchorage loss was also measured to evaluate the difference between two groups. All patients showed significant sagittal skeletal changes after treatment, and there was no statisticallysignificant difference between the two groups. When anchorage loss was evaluated, no differences were shownbetween the two. Facemask with Hyrax or bonded expander is similarly an effective method as a treatment in class IIImalocclusion patients.
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