Development of a new standard procedure for the evaluation of composite abrasive wear

Abstract

This article discusses the development of a test bench and a methodology for the study of composite resin abrasive wear. To evaluate the operation of the test bench and to compare the proposed methodology with other existing ones, a study was made of the five composites most commonly used by dentists. The one-way ANOVA method and the Tukey test were used to statistically analyze the results by multiple comparisons of the groups of resins tested. Using the proposed methodology, these resins were classified in an increasing order of abrasive wear strength, as follows: Charisma (the lowest abrasive wear strength), Tetric, TPH, Herculite and Z-100 (the highest abrasive wear strength) (p < 0.05). In comparison to other methodologies, the results of the proposed methodology presented the lowest coefficient of variation.

On evaluation of wear resistance of tooth enamel and dental materials

“…However, in some papers a certain disadvantage is reported, namely poor repeatability of results obtained at potentially the same parameters, i.e. load, contact pressure, sliding speed and so on [3]. It seems that the above statement could be general regarding the majority of tribological tests, as the problem of reproducibility of wear and friction is considered not only for tooth tissues or dental materials [4].…”

“…The coefficient of variation, calculated for the wear depth on the basis of their experimental results, ranged from 18. 6 In order to improve reproducibility of wear both tooth enamel and dental materials different methods towards standardization of test procedure have been used [3,7]. However, the obtained results were not always satisfactory.…”