Wear model simulating clinical abrasion on composite filling materials

• Published in: Dental Materials Journal Vol. 30; no. 5; pp. 739 - 748
• Main Authors: JOHNSEN, Gaute Floer, TAXT-LAMOLLE, Sébastien F., HAUGEN, Håvard J.
• Format: Journal Article
• Language: English; Japanese
• Published: Japan The Japanese Society for Dental Materials and Devices 2011; Japanese Society for Dental Materials and Devices
• Subjects: Abrasion; Abrasion resistance; Acetophenones - chemistry; Acid Etching, Dental; Bisphenol A-Glycidyl Methacrylate - chemistry; Composite materials; Composite Resins - chemistry; Dental Cavity Preparation - classification; Dental Materials - chemistry; Dental Polishing; Dental Restoration Wear; Dental Restoration, Permanent; Dentistry; Filler volume; Fillers; Filling composite materials; Holes; Humans; Incisor; Microscopy, Electron, Scanning; Particle Size; Phosphoric Acids - chemistry; Polyethylene Glycols - chemistry; Polymerization; Polymethacrylic Acids - chemistry; Saliva - physiology; Silanes - chemistry; Silicon Dioxide - chemistry; Spectroscopy, Fourier Transform Infrared; Surface Properties; Surface roughness; Temperature; Tooth Abrasion - physiopathology; Wear; Wear model; Wear resistance; X-Ray Microtomography; Zirconium - chemistry
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2011-077

The aim of this study was to establish a wear model for testing composite filling materials with abrasion properties closer to a clinical situation. In addition, the model was used to evaluate the effect of filler volume and particle size on surface roughness and wear resistance. Each incisor tooth was prepared with nine identical standardized cavities with respect to depth, diameter, and angle. Generic composite of 3 different filler volumes and 3 different particle sizes held together with the same resin were randomly filled in respective cavities. A multidirectional wet-grinder with molar cusps as antagonist wore the surface of the incisors containing the composite fillings in a bath of human saliva at a constant temperature of 37°C. The present study suggests that the most wear resistant filling materials should consist of medium filling content (75%) and that particles size is not as critical as earlier reported.