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BioMed Research International
Volume 2014 (2014), Article ID 790572, 6 pages
http://dx.doi.org/10.1155/2014/790572
Research Article

Initial Sliding Wear Kinetics of Two Types of Glass Ionomer Cement: A Tribological Study

1UFR d’Odontologie, Université de Lyon, 11 rue Guillame Paradin, 69372 Lyon, France
2Service de Consultations et Traitements Dentaires, Hospices Civils de Lyon, 6-8 Place Deperet, 69365 Lyon, France
3Laboratoire des Multimatériaux et Interfaces, CNRS UMR 5615, Université de Lyon, 11 rue Guillaume Paradin, 69372 Lyon, France
4Laboratoire de Génie des Procédés et Matériaux, Ecole Centrale Paris, Chemin des Vignes, 92295 Châtenay-Malabry, France
5UFR d’Odontologie, Université Denis Diderot Paris 7, 5 rue Garancière, 75006 Paris, France

Received 27 February 2014; Revised 3 June 2014; Accepted 4 June 2014; Published 29 June 2014

Academic Editor: Salvatore Sauro

Copyright © 2014 Cyril Villat et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this work was to characterize the initial wear kinetics of two different types of glass ionomer cement used in dentistry (the conventional glass ionomer cement and the resin-modified glass ionomer cement) under sliding friction after 28-day storing in distilled water or Ringer’s solution. Sliding friction was applied through a pin-on-disk tribometer, in sphere-on-plane contact conditions, under 5 N normal load and 120 rotations per minute. The test lasted 7500 cycles and replicas were performed at 2500, 5000 and 7500 cycles. A profilometer was used to evaluate the wear volume. Data were analysed using Student’s -test at a significant level of 5%. There is no statistical significant difference between the results obtained for a given material with the maturation media ( ). However, for a given maturation medium, there are significant statistical differences between the data obtained for the two materials at each measurement ( ). The wear rates of both materials decrease continuously during the running-in period between 0 and 2500 cycles. After 2500 cycles, the wear rate becomes constant and equal for both materials. The resin matrix contained in the resin-modified glass ionomer cement weakens the tribological behaviour of this material.