Influence of friction Coefficient on wear of enamel and various dental restorative materials.

固定义齿咬合面修复材料的一个重要特点是耐磨损，对对牙不产生负面影响。用于咬合面修复的材料的选择应显示对变形的机械阻力，包括磨损。当讨论用于咬合表面的假体材料时，感兴趣的两个方面是假体材料对磨料磨损的抵抗力，以及材料在天然或人工牙列上产生相反咬合表面磨损的倾向。这项磨损的体外研究评估了5种修复材料和牙釉质的物理和摩擦学特性。牙用金属、牙瓷、复合树脂和人牙釉质。在滑动磨损试验机上模拟了咬合接触磨损。每种材料的5个试件在49N垂直荷载下采用销板振荡滑动设计进行试验。拮抗剂的水平偏移量为3mm。磨损被量化为50000次循环。瓷对立复合树脂和瓷的磨损值明显大于其他材料。摩擦力在口腔修复材料的磨损过程中起着重要的作用，研究摩擦产生的能量如何在材料表面耗散是一个值得关注的问题。本研究的目的是确定摩擦能耗散与磨损特性之间的关系。采用磨损试验对5种修复材料与牙釉质的摩擦系数进行评价。然而，在本研究中，对牙材料的摩擦系数和磨损的评估并没有发现这两者之间的关系。

An important feature of materials used in the restoration of occlusal surface of fixed prosthodontics is resistance to wear and the lack of a negative influence on the opposite teeth. The choice of materials used for the restoration of occlusal surfaces should show mechanical resistance to de formation, including attrition. Two aspects of interest when discussing prosthetic materials used for occlusal surfaces are the resistance to abrasive wear of the prosthetic material, and the predisposition of the materials to create wear of the opposing occlusal surfaces on natural or artificial dentition. This in vitro investigation of wear evaluated the physical and tribological characteristics of 5 restorative materials and dental enamel. Three dental metals, dental porcelain, composite resin and human enamel were used. Occlusal contact wear was simulated in a sliding wear tester. Five specimens of each material were tested in a pin-on-plate design with oscillating sliding at a vertical load of 49N. The horizontal excursion of the antagonist was 3 mm. Wear was quantified by 50,000 cycles. The wear values for porcelain opposing composite resin or porcelain were significantly greater than others.Frictional forces play a major role in the oral wear process of dental restorative materials and it would be of interest to consider how the energy from friction is dissipated at the material surface. The aim of the current investigation was to determine the relationship between the dissipation of frictional energy and the wear characteristics. Friction coefficient of 5 restorative materials and dental enamel, used by wear test were evaluated. However, the evaluation of friction coefficient and wear of dental materials in this study has identified no relationship between these two factors.