Evaluation of wear behavior of dental restorative materials against zirconia in vitro

Maier E, Grottschreiber CM, Knepper I, Opdam N, Petschelt A, Loomans B, Lohbauer U (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Dental Materials Elsevier

Book Volume: 38

Pages Range: 778-788

Journal Issue: 5

DOI: 10.1016/j.dental.2022.04.016

Abstract

Objectives: To evaluate two-body wear (2BW) and three-body wear (3BW) of different CAD/CAM and direct restorative materials against zirconia using a dual-axis chewing simulator and an ACTA wear machine. Methods: 3 CAD-CAM resin-based composite or polymer infiltrated ceramic network blocs, 1 lithium disilicate CAD-CAM ceramic (LS2), 3 direct resin composites, amalgam and bovine enamel were tested. For 2BW, 8 flat specimens per material were produced, grinded, polished, stored wet (37 °C, 28d) and tested (49 N, 37 °C, 1,200,000 cycles) against zirconia. For 3BW, specimens (n = 10) were stored accordingly, and tested against a zirconia antagonist wheel (3Y-TZP, d = 20 mm, h = 6 mm; 200,000 cycles, F = 15 N, f = 1 Hz, 15% slip) in millet seed suspension. Wear resistance was analysed in a 3D optical non-contact profilometer, measuring vertical wear depth and volume loss for 2BW and mean wear depth and roughness (Ra) for 3BW. Vickers hardness (15 s, HV2) was measured. Statistical analysis was performed using non-parametric tests (Mann-Whitney-U test, p < 0.05). Results: 2BW and 3BW have a different impact on material surfaces. Similar wear resistance was observed for direct and indirect resin based materials with analogous filler configurations in both methods. Bovine enamel exhibited the best wear resistance in 2BW, but the least wear resistance in 3BW against zirconia. Regarding 2BW, a direct/indirect composite material pair of the same manufacturer showed the significantly highest mean volume losses (2.72/2.85 mm³), followed by LS2 (1.41 mm³). LS2 presented the best wear resistance in 3BW (mean wear depth 2.85 µm), combined with the highest mean Vickers hardness (598 MPa). No linear correlation was found between Vickers hardness and both wear testing procedures. The zirconia antagonists showed no recordable signs of wear. Significance: Dental restorative materials behave differently in 2BW and 3BW laboratory testing. Vickers hardness testing alone cannot hold for a correlation with wear behavior of materials. Micromorphological investigation of material composition can reveal insights in wear mechanisms related to variations in filler technologies.

Authors with CRIS profile

Eva Maier Department of Operative Dentistry and Periodontology Christine-Maria Grottschreiber Department of Operative Dentistry and Periodontology Ines Knepper Department of Operative Dentistry and Periodontology Anselm Petschelt Lehrstuhl für Zahn-,Mund- und Kieferheilkunde, insbesondere Zahnerhaltung, Parodontologie und Kinderzahnheilkunde Ulrich Lohbauer Medizinische Fakultät

Additional Organisation(s)

Interdisziplinäres Zentrum für Klinische Forschung

Related research project(s)

J103: Accurate prediction modelling of the clinical longevity of milled and novel 3D-printed dental materials Dec. 16, 2022 - June 15, 2025

Involved external institutions

Radboud University Nijmegen Medical Centre / Radboudumc of voluit Radboud Universitair Medisch Centrum (UMC) NL Netherlands (NL)

How to cite

APA:

Maier, E., Grottschreiber, C.-M., Knepper, I., Opdam, N., Petschelt, A., Loomans, B., & Lohbauer, U. (2022). Evaluation of wear behavior of dental restorative materials against zirconia in vitro. Dental Materials, 38(5), 778-788. https://doi.org/10.1016/j.dental.2022.04.016

MLA:

Maier, Eva, et al. "Evaluation of wear behavior of dental restorative materials against zirconia in vitro." Dental Materials 38.5 (2022): 778-788.

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