文章基本信息

标题：Statistical Comparison of the Hardness and Scratch-Resistance of the PMMA Polymers Used in Orthodontic Appliances
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作者：Ivo Domagała ; Leszek Gil ; Marcel Firlej 等
期刊名称：Advances in Science and Technology Research Journal
印刷版ISSN：2080-4075
电子版ISSN：2299-8624
出版年度：2020
卷号：14
期号：4
页码：250-261
DOI：10.12913/22998624/127437
语种：English
出版社：Society of Polish Mechanical Engineers and Technicians
摘要：The paper presents the studies and results of the Shore hardness and scratch test of polymer materials used inmedical devices. Polymers of organic PMMA (poly(methyl methacrylate)) origin for the manufacture of orth-odontic appliances were tested. Samples of test materials differed in manufacturing technology. The surfacefunctional properties of four materials were compared. Hardness tests were performed with the Shore D hard-ness test method. The scratch test was done with a Rockwell diamond cone indenter. The hardness was alsocalculated from the scratch test. Shore’s highest hardness was demonstrated in 1A material. But the differencesin Shore’s hardness were small. Larger differences between the tested materials were shown in the scratch testthan in the Shore hardness test. The lowest residual scratch depth (Rd) was obtained for 1A material. 3A mate-rial had the highest scratch hardness.
关键词：orthodontic appliances; PMMA; hardness; scratch resistance.