Wear of Dental Filling Materials and Possibilities of its Measurement

Abstract

Background: Tooth wear is a complex multifactorial phenomenon conditioned by the interaction of biological, mechanical, chemical and tribological factors. The surface of hard dental tissues as filling material replacing enamel and dentine has mechanical load by antagonist (attrition) or another object in the oral cavity such toothbrush, toothpaste, etc. (abrasion). These processes lead to surface defects of hard dental tissues and fillings. The report describes the possible methods of experimental ("pin on disc" method, tooth brushing machine, computer-controlled jaw simulator, material hardness and elastic modulus measurement using nanoindentation, scratch test, etc.) and clinical evaluation (Ryge and Cvar criteria, FDI criteria, profilometry, measurement of computer models by CAD/CAM scanner) wear of dental reconstruction materials. Conclusion: Knowledge of the individual properties of the reconstruction materials influencing their wear will help the dentist to choose the appropriate type of material and to properly inform the patient about its reconstruction lifespan.

Keywords

• wear
• ryge and cvar criteria
• fdi criteria
• tribology
• pin on disk
• nanoindentation
• scratch test
• profilometry