다양한 스테인레스 강 교정용 와이어의 토오크 특성
Torque properties of various stainless steel orthodontic wires
송규철, 강혜연, 주성원, 이상혁, 이유미, 임범순,
소속 상세정보
송규철 ( Song Kyu-Cheol ) - 서울대학교 치의학대학원 치과생체재료과학교실
강혜연 ( Kang Hye-Yeon ) - 서울대학교 치의학대학원 치과생체재료과학교실
주성원 ( Ju Sung-Won ) - 서울대학교 치의학대학원 치과생체재료과학교실
이상혁 ( Lee Sang-Hyeok ) - 서울대학교 치의학대학원 치과생체재료과학교실
이유미 ( Lee Yoo-Mee ) - 서울대학교 치의학대학원 치과생체재료과학교실
임범순 ( Lim Bum-Soon ) - 서울대학교 치의학대학원 치과생체재료과학교실
KMID : 0362220130400010015
Abstract
The aim of present study was to evaluate the torque characteristics of stainless steel orthodontic wires. Forty six rectangular stainless wires were tested. Torque testing was performed by stepwise twisting of the rectangular wires to increasing values of torsion using a torquemeter. The wire was clamped at one end and gripped at the other end by a torquemeter. As the rotating torquemeter turned by step motor controlled by computer, the resulting torque from 0o to 90o was recorded. Five measurements were performed at each experimental group. The data were analyzed using t-test and Newman-Keuls multiple comparisons test (p=0.05). All experimental groups showed the clinically effective torque value ranged of 5-20 N?mm. Torque of wires increased with the increasing of dimensions (p<0.05).Correlation of dimension of wires and torque became high at twist angle above 30o. There were no significant difference in torque between wire manufacturers with same dimensions (p>0.05). Among the 3 different types (standard, resilient, HI-T) of wire, the resilient wire showed the highest torque whereas the HI-T wire showed the lowest torque. All experimental groups showed proper torque for clinical applications at twist angle above 30o.
키워드
Torque; twist; stainless steel wires; dimension
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