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가공선 크라스프의 가요성에 관한 비교 연구
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  • 가공선 크라스프의 가요성에 관한 비교 연구
  • A COMPARATIVE STUDY ON THE FLEXIBILITY OF THE WROUGHT WIRE CLASPS
저자명
엄태완,장익태,김광남,Eom. Tae-Wan,Chang. Ik-Tae,Kim. Kwang-Nam
간행물명
대한치과보철학회지
권/호정보
1989년|27권 2호|pp.261-270 (10 pages)
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대한치과보철학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

Bend test is one of the methods comparing the physical properties of the clasp wires. The type of bend test used in this investigation was the cantilever loading of a wrought wire. The purpose of this study was to compare the flexibility of a number of commonly used clasp wires, in according to gauge, alloy and heat treatment, under specific condition of load and deflection. Seven noble and one base metal wires were tested under three conditions as follows: (1) as received, (2) quenched (placed in an over at $700^{circ}C$ for ten minutes and immediately quenched in water at room temperature.), (3) oven cooled (quencned as described, then placed in an oven at $450^{circ}C$ for two minutes and uniformly slowly cooled to $250^{circ}C$ in thirty minutes.) The basic test specimen consists of a sample 25 mm in length and 19, 18 gauge in diameter (17 gauge also in two alloys), and the wire was loaded in the form of straight cantilever beams. Force at 0.25 mm (0.01 inch) and 0.5 mm (0.02 inch) deflections for all samples were recorded. The results were as follows ; 1. Ticonium was least flexible and No. 2 was most flexible in according to gauge, alloy and heat treatment. 2. In most of precious wrought wire, the flexibility was increased, but there was no statistically significant differences between as-received and softened condition. 3. There was no statistically differences between as-received and hardened condition. 4. For each alloy, there were statistically significant differences in flexibility due to clasp diameter.