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가토경골에서 즉시 부하된 교정용 Miniscrew의 시간에 따른 제거회전력값 및 전자현미경 관찰소견 비교

Time-dependent Removal Torque Values and Scanning Electron Microscopic Views of Immediately Loaded Orthodontic Miniscrews in Rabbit Tibias

대한병원치과의사협의회지 2006년 2권 2호 p.106 ~ 112
한형욱, 김성훈, 지유진, 이원, 국윤아, 송현철,
소속 상세정보
한형욱 ( Han Hyung-Uck ) - 가톨릭대학교 의정부성모병원 치과 구강악안면외과
김성훈 ( Kim Seong-Hun ) - 가톨릭대학교 의정부성모병원 치과 보철과
지유진 ( Jee Yu-Jin ) - 가톨릭대학교 성빈센트병원 치과 구강악안면외과
이원 ( Lee Won ) - 가톨릭대학교 의정부성모병원 치과 구강악안면외과
국윤아 ( Kook Yoon-Ah ) - 가톨릭대학교 강남성모병원 교정과
송현철 ( Song Hyun-Chul ) - 가톨릭대학교 성빈센트병원 치과 구강악안면외과

Abstract


We evaluated the possibility of immediate loading of orthodontic miniscrew. Two miniscrews (Dual-Top JB screw, Jaeil corp., Seoul, Korea) were inserted about 18 mm apart in one tibia and immediate load (100 gm) was applied. The size of miniscrews were 1.6 mm in diameter, 8.0 mm in length. Twenty New Zealand white mature male rabbits were used and classified into four groups. A total of 80 miniscrews were inserted. Removal torque values measured in miniscrews which were removed immediately after insertion were used as control. After 1 week, 6 weeks and 10 weeks, removal torque values of miniscrews were measured and rabbits were sacrificed. Surface textures of a part of 1 week, 6 week group miniscrews were observed with Scanning electron microscopy (JSM5410LV, Jeol corp., Tokyo, Japan). The average removal torque values were 5.375±2.21 Ncm for control group, 2.285±1.37 Ncm for 1 week group, 3.580±2.19 Ncm for 6 week group, 3.415±1.22 Ncm for 10 week group. The torque measurements yielded statistically significant differences among the control group, 1 week group, and 6 week group. Scanning electron microscopic views of 1 week and 6 week groups, demonstrated cell attachments on the surface of miniscrews, while cell attachments were disappeared after washing procedure. These findings demonstrate that removal torque value loss of early period can be recovered and miniscrews can resist the continous load. Immediately loaded orthodontic miniscrews have potential as a anchorage for orthodontic treatment.

키워드

Removal torque;Immediate loading;Miniscrew;Scanning electron microscopy

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