Journal of Technologic Dentistry (대한치과기공학회지)
- Volume 6 Issue 1
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- Pages.19-26
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- 1984
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- 1229-3954(pISSN)
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- 2288-5218(eISSN)
Effect of Two Variables on the Casting Ability of Some Nonpercious Alloys for Porcelain-Metal Restorations
납형의 직경 및 소환방법이 도재-금속 보철물용 비귀금속 합금의 주조성에 미치는 영향
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Kim, Uoong-Chul
(Dept. of Dental Laboratory Technology, Junior College of Public Health and Medical Technology, Korea University)
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김웅철
(고려대학교 보건전문대학 치기공과)
- Published : 1984.05.01
Abstract
This Experimental study was performed to study the effect of the heat soaking and the diameter of pattern on the casting ability of three nonprecious alloys manufactured for porcelain-metal restorations, with respect to their ability to reproduce test pieces by casting over a selected range of uniform diameters. Samples of total 60 were constructed and divided into 6 groups according to the two variables, the diameter and the heat soaking. The completed cast samples were examined visually and measured with a caliper calibrated to 0.05mm. The results obtained were as follows: 1. Length cast was significantly related to the diameter to be cast, especially in the case of the marrowest diameter of 230m. 2. Length cast not significantly related to the heat soaking. 3. The completeness of casting was significantly related to the diameter to be cast, particularly in the case of the narrowest diameter of 230m. 4. The completeness of casting was not significantly related to the heat soaking. 5. All of the three nonprecious alloys used for this experiment were significantly different from an ideal alloy in the completeness of casting.
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