국소의치용 티나늄의 피로도 및 물리적 성질에 관한 연구
A study on the fatigue and removable partial denture designs for patients in Korea
김학선, 김광남, 장익태,
소속 상세정보
김학선 ( Kim Hak-Sun ) - 서울대학교 치과대학 치과보철학교실
김광남 ( Kim Kwang-Nam ) - 서울대학교 치과대학 치과보철학교실
장익태 ( Chang Ik-Tae ) - 서울대학교 치과대학 치과보철학교실
KMID : 0362419940320020249
Abstract
The purpose of this study was to compare the fatigue, physical properties, flexibility and surface roughness of titanium used in removable partial dentures with those of a type IV gold alloy and a cobalt-chromium alloy. Fatigue testing subjected the test specimen to rapid cycling at a given stress until failure occurred by using a small-sized, electro-dynamic type bending fatigue testing machine. The S-N curves for the framework materials were generated. For tensile testing, a tensile bar as described in the ADA Specification No. 14 was subjected to tensile loading until failure occurred. Load-displacement curves were generated for 18 gauge round specimen and tapered half round specimen. Then the flexibilities were calculated. The surface roughnesses were compared by analyzer. @ES Through analyses of the data, the following conclusions were obtained. @EN 1. The fatigue property of titanium was higher than that of a type IV gold alloy (p≤0.05), but there was no significant difference between titanium and a cobalt-chromium alloy (p≥0.05). 2. The yield strength, the ultimate tensile strength and Vickers hardness of titanium were higher than those of a type IV gold alloy but lower than those of a coalt-chromium alloy(p≤0.05). 3. The percentage of elongation and reduction of area of titanium were the highest(p≤0.05). 4. The surface roughness of titanium was the greatest(p≤0.05). 5. The flexibility of titanium was lower than that of a type that of type IV gold alloy but higher than that of a cobalt-chromium alloy(p≤0.05).
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