Analysis of polymerization time on abrasive wear of dental resins

• Published in: Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2010-03, Vol.13 (1), p.41-44, Article 41
• Main Authors: Bianchi, Eduardo Carlos, Ulhôa, Michele Paoline de Martins, Aguiar, Paulo Roberto, Freitas, César Antunes de, Gonçalves, Gilberto de Magalhães Bento
• Format: Article
• Language: English
• Subjects: abrasive wear; composite resins; ENGINEERING, CHEMICAL; MATERIALS SCIENCE, MULTIDISCIPLINARY; METALLURGY & METALLURGICAL ENGINEERING; photopolymerization time; sharpness
• ISSN: 1516-1439; 1980-5373; 1980-5373; 1516-1439
• DOI: 10.1590/S1516-14392010000100010

An evaluation was made of the abrasive wear of six composite thermofixed dental resins subjected to different polymerization times. The method of evaluation was based on sharpness measurements to quantify the abrasive wear resistance of the resins. To this end, a test bench was built, consisting of a rotating porcelain cylinder that wears out a resin-coated cylinder placed above it, thus causing vertical displacement of the contact as the wear progresses. The values of vertical displacement, i.e., the input variables, were read and recorded by means of a computer program to obtain the sharpness values. These data indicated that the resins displayed different behaviors as a function of the polymerization times applied, reinforcing the importance of using a practical and rapid method of analysis in order to ensure that the behavior of new materials is fully understood before they are launched on the market.