CAJ | 학술논문

背景:在临床修复过程中,人工牙材料的硬度和耐磨性高低会直接影响修复效果.然而到目前为止,在中国的树脂牙行业标准中并没有提到对树脂牙耐磨性和硬度的要求.目的:通过对7种常用的树脂牙进行硬度和耐磨性的比较,为临床修复牙列缺损缺失时人工牙的选择提供理论基础.设计、时间及地点:对比观察实验,于2003-11/2004-05在上海交通大学机械工程学院实验室完成.材料:选择7种不同树脂牙,它们分别为硬质复色合成树脂牙(A)、复色合成树脂牙(B)、合成树脂牙(C)、ENDURA塑钢牙(D)、三层色合成树脂牙(E)、Optostar四层色合成树脂牙(F)、CosmosHXL(G).方法:用销-盘式摩擦磨损试验机进行磨耗试验,用磨耗质量损耗及电镜观察比较这7种树脂牙的耐磨性能.采用努氏硬度法测试树脂牙的显微硬度.分析树脂牙耐磨性和硬度之间的相关性.主要观察指标:树脂牙耐磨性和硬度.结果:通过磨耗前后各树脂牙质量的损耗及电镜观察结果得出不同树脂牙耐磨性从高到低排列为:D>A>G>E>B>F>C;努氏硬度值由高到底的顺序是:D>A>G>E>F>B>C.树脂牙磨耗失质量和硬度值的相关系数为-0.888(P<0.01).结论:材料组成成分、相对分子质量和树脂牙加工工艺的差别可造成不同树脂牙硬度和耐磨性能之间的差异;不同树脂牙的硬度和耐磨性呈正相关.
배경:재림상수복과정중,인공아재료적경도화내마성고저회직접영향수복효과.연이도목전위지,재중국적수지아행업표준중병몰유제도대수지아내마성화경도적요구.목적:통과대7충상용적수지아진행경도화내마성적비교,위림상수복아렬결손결실시인공아적선택제공이론기출.설계、시간급지점:대비관찰실험,우2003-11/2004-05재상해교통대학궤계공정학원실험실완성.재료:선택7충불동수지아,타문분별위경질복색합성수지아(A)、복색합성수지아(B)、합성수지아(C)、ENDURA소강아(D)、삼층색합성수지아(E)、Optostar사층색합성수지아(F)、CosmosHXL(G).방법:용소-반식마찰마손시험궤진행마모시험,용마모질량손모급전경관찰비교저7충수지아적내마성능.채용노씨경도법측시수지아적현미경도.분석수지아내마성화경도지간적상관성.주요관찰지표:수지아내마성화경도.결과:통과마모전후각수지아질량적손모급전경관찰결과득출불동수지아내마성종고도저배렬위:D>A>G>E>B>F>C;노씨경도치유고도저적순서시:D>A>G>E>F>B>C.수지아마모실질량화경도치적상관계수위-0.888(P<0.01).결론:재료조성성분、상대분자질량화수지아가공공예적차별가조성불동수지아경도화내마성능지간적차이;불동수지아적경도화내마성정정상관.
BACKGROUND: The wear resistance and hardness of artificial tooth would affect repairing effects in clinic. However, there is lack of professional standard for resin teeth in China.OBJECTIVE: To provide a theoretic foundation for the choosing of the resin teeth in clinic via comparing the wear resistance and hardness among 7 different resin teeth.DESIGN, TIME AND SETTING: A contrast observation. The experiment was performed at the laboratory of Mechanical Engineering College, Shanghai Jiao Tong University from November 2003 to May 2004.MATERIALS: A total of 7 kinds of different resin teeth were selected, namely, hard multi-layer synthetic resin teeth (A); multi-layer synthetic resin teeth (B); synthetic resin teeth (C); EMDURA resin teeth (D); three-layer synthetic resin teeth (E); optostar four-layer synthetic resin teeth (F); and Cosmo HXL (G).METHODS: The wear test was processed by a pin-plate wear machine. The result was measured by the weight loss through wearing and the surfaces of the wear scar were observed by a scanning electronic microscope (SEM); hardness was measured by Knoop hardness. Meanwhile, the relativity between the hardness and wear resistance of resin teeth was analyzed.MAIN OUTCOME MEASURES: The wear resistance and hardness of resin teeth.RESULTS: According to the weight loss and SEM examination, the wear resistance of the different resin teeth was D>A>G>E>B>F>C; and the hardness of different resin teeth was D>A>G>E>F>B>C. The correlation coefficient between the weight loss and hardness was -0.888 (P < 0.01).CONCLUSION: The variation of the wear resistance of the resin teeth may influenced by their different components, molecular weight and manufacturel methods. There are positive correlation between the hardness and wear resistance of resin teeth.