Sato Hideaki, Kameyama Yutaka, Shimpo Ryokichi, Yang Yuanyuan, Komasa Satoshi
Department of Mechanical Engineering, Faculty of Science and Engineering, Tokyo City University, Setagaya-ku, Tokyo, Japan.
Department of Prosthodontics & Orthodontics, The Second Affiliated Hospital Zhejiang University School of Medicine, Hangzhou, P.R. China.
Biomed Mater Eng. 2025 Jul;36(4):241-256. doi: 10.1177/09592989241313327. Epub 2025 Apr 15.
BackgroundThe success of dental restorations depends on achieving adequate surface integrity. However, grinding and polishing are generally ineffective because of the special physical and chemical compositions and properties of the composites. Polyurea resin is an elastomer with high elasticity, abrasion resistance, heat resistance, and toughness. When it is used as a bond, grinding wheels with high grain grip strength can be fabricated.ObjectiveWe fabricated a mounted wheel with a polyurea resin as the bond and used it to polish a composite resin and porcelain under clinical polishing conditions. The effects of the approach on the polished surface roughness and morphology were evaluated with respect to the type of mounted wheel, initial surface roughness, abrasive particle size, and polishing time.MethodsThis study fabricates a mounted wheel with polyurea resin as the bond and uses it to polish composite resin and porcelain under clinical polishing conditions. The effects of the approach on the polished surface roughness and morphology are evaluated against the type of mounted wheel, initial surface roughness, abrasive particle size, and polishing time.ResultsAmong single-crystal diamond, siliconcon carbide (GC), and alumina (WA) abrasive grains, diamond abrasive grains produced the best finish for most tested resin composites. However, WA abrasive grains are effective for polishing Estenia (it has the highest filler content). The polishing performance of the porcelain varied with the initial surface roughness and abrasive particle diameter.ConclusionThis study provides guidance for improving and developing mounted wheels for clinical applications.
背景
牙齿修复体的成功取决于实现足够的表面完整性。然而，由于复合材料特殊的物理和化学组成及性质，打磨和抛光通常效果不佳。聚脲树脂是一种具有高弹性、耐磨性、耐热性和韧性的弹性体。当用作粘结剂时，可以制造出具有高磨粒握持强度的砂轮。
目的
我们制造了一种以聚脲树脂为粘结剂的安装式砂轮，并在临床抛光条件下用它对复合树脂和瓷器进行抛光。针对安装式砂轮的类型、初始表面粗糙度、磨粒尺寸和抛光时间，评估了该方法对抛光表面粗糙度和形貌的影响。
方法
本研究制造了一种以聚脲树脂为粘结剂的安装式砂轮，并在临床抛光条件下用它对复合树脂和瓷器进行抛光。针对安装式砂轮的类型、初始表面粗糙度、磨粒尺寸和抛光时间，评估了该方法对抛光表面粗糙度和形貌的影响。
结果
在单晶金刚石、碳化硅（GC）和氧化铝（WA）磨粒中，对于大多数测试的树脂复合材料，金刚石磨粒产生的抛光效果最佳。然而，WA磨粒对Estenia（其填料含量最高）的抛光有效。瓷器的抛光性能随初始表面粗糙度和磨粒直径而变化。
结论
本研究为改进和开发临床应用的安装式砂轮提供了指导。
