不同树脂材料的强度评价不同树脂材料用于覆盖义齿的强度评价

Future Dental Journal Pub Date : 2021-12-01 DOI:10.54623/fdj.7028

M. Emam, Hesham Alam EL Deen, Hamdy Abu El Fotoh, Ayman Fateen

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引用次数: 1

摘要

引言:寻找合适的材料修复相对较小的弓间空间，既能达到合理的美学效果，又能达到良好的功能强度，这是一个困难的过程，需要对临床情况有很好的了解和精确的管理。历史上，金属用于提供尽可能小的厚度，具有优异的强度，但缺乏弹性，美观性差。研究目的:本体外研究比较了两种不同的美学材料PEEK和ACETAL在相对较小厚度下作为覆盖义齿框架时的机械强度。材料和方法:按照美国材料试验学会(ASTM)国际标准制备120个样品，按材料分为两组，A组PEEK样品和B组ACETAL样品。每组60个标本按1、1.5、2 mm三种不同厚度再分为I、II、III组。每组包含20个相同的样本，其中一半被吸水，另一半不被碰触。然后在通用试验机(UTM)上加载所有试件直至失效。结果:使用独立样本的学生t检验分析数据，并显示厚度的任何增加都会导致弯曲强度的增加，这在所有缩醛样品中与PEEK样品相比是成比例的。所有PEEK样品在每个厚度上的弯曲强度值都比缩醛样品高得多。厚度为2mm的缩醛样品不能提供符合国际高分子材料标准和ISO要求的足够强度。结论:PEEK样品的抗弯强度比缩醛样品高3倍。缩醛厚度应大于2mm。水对缩醛材料的强度有显著影响

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Evaluation of Strength of Different Resin Materials Used in Evaluation of Strength of Different Resin Materials Used in Overdenture

Introduction: Finding a suitable material that could be used to restore relatively small inter-arch spaces in which reasonable aesthetics as well as good functional strength could be achieved is a difficult process that requires good understanding of the clinical situation and precise management. Historically Metal used to offer the smallest possible thickness with excellent strength but lacks resiliency with poor aesthetics. Aim of the study: This In-vitro study was conducted to compare two different aesthetic materials PEEK and ACETAL regarding their mechanical strength when used as Overdenture framework in a relatively small thickness. Material and Methods: 120 specimens were prepared according to the American Society for Testing and Materials (ASTM) International standards and divided into two main groups according to the material, group (A) PEEK samples and group (B) ACETAL samples. Each group of 60 specimens was subdivided into three different groups (I, II, III) according to three different thicknesses (1, 1.5 and 2 mm). Each group contains 20 identical samples, half of them were subjected to water absorption and the other half were left untouched. Then all specimens were loaded to failure in a Universal Testing Machine (UTM). Results: Data analyzed using Student’s t test for independent samples and showed that any increase in thickness lead to increase in the flexural strength which was proportioned in all Acetal samples in contrast to PEEK samples. All PEEK samples recorded significantly higher flexural strength values on every thickness than Acetal samples. Acetal samples with 2 mm of thickness did not offer enough strength as suggested by the international standards for polymer materials and ISO. Conclusions: The flexural strength of PEEK samples was 3 times higher than Acetal samples. Acetal thickness should be more than 2mm. water has a significant effect on the strength of Acetal materials

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Future Dental Journal

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