In-vitro study of the sliding-wear of CAD/CAM dental composite materials

IF 6.1 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Fernando Rodríguez-Rojas , Estíbaliz Sánchez-González , Óscar Borrero-López , Mark Hoffman
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引用次数: 0

Abstract

Polymer-ceramic composites are widely employed in dental prostheses. However, due to low hardness values, their lifetime is often limited by wear. Here, the wear of commercially available dental CAD/CAM composites is explored through in-vitro tests involving extended sliding contact with a zirconia antagonist. The predominant wear mode is abrasion, with specific mechanisms including plastic deformation at the asperity level and microcracking. The extent of damage exhibits significant variability as a function of materials’ microstructure, resulting in wear volume differences of up to two orders of magnitude. The findings are analyzed within the framework of tribology and contact fracture mechanics. Strategies for enhancing durability are discussed, emphasizing potential microstructural engineering approaches—increasing hardness, improving particle-matrix adhesive strength, and optimizing particle aspect ratio.
CAD/CAM 牙科复合材料滑动磨损的体外研究
聚合物陶瓷复合材料被广泛应用于牙科修复体中。然而,由于硬度值较低,其使用寿命往往受到磨损的限制。在此,我们通过与氧化锆拮抗剂进行长时间滑动接触的体外测试,探讨了市售牙科 CAD/CAM 复合材料的磨损情况。主要的磨损模式是磨损,具体机制包括基底层的塑性变形和微裂纹。损坏程度因材料微观结构的不同而有很大差异,导致磨损量相差达两个数量级。研究结果在摩擦学和接触断裂力学的框架内进行了分析。讨论了提高耐久性的策略,强调了潜在的微结构工程方法--提高硬度、改善颗粒基体粘合强度和优化颗粒长宽比。
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来源期刊
Tribology International
Tribology International 工程技术-工程:机械
CiteScore
10.10
自引率
16.10%
发文量
627
审稿时长
35 days
期刊介绍: Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.
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