Article In: scopus

Wear of zirconia/leucite glass-ceramics composites: a chewing simulator study

Ceramics International

Branco A.C.; Santos T.; Figueiredo-Pina C.G. — 2022 — Elsevier

Key information

Authors:

Branco A.C. (Ana Catarina Moreno Branco); Santos T.; Polido M.; Colaço R. (Rogério Anacleto Cordeiro Colaço); Serro A.P. (Ana Paula Valagão Amadeu do Serro); Figueiredo-Pina C.G.

Published in

02/15/2022

Abstract

Leucite and zirconia are commonly used in the production of prosthetic dental materials. Leucite presents attractive optical properties but low toughness and wear resistance, which limits its use. Zirconia has much higher toughness, but due to aesthetic reasons and ageing issues, needs to be glass veneered. Chipping of such veneer is usually responsible for the abnormal wear induced on the antagonist teeth. Leucite reinforced with 25% of nano-zirconia is a promising alternative to overcome these issues, allowing the production of dental restorations without veneer. This study aims to investigate if leucite-zirconia composites have suitable optical, mechanical and tribological properties to be used in dental restoration. Samples with different compositions of leucite and/or nano-zirconia were produced by unidirectional compression and characterized concerning density, surface morphology, roughness, hardness, toughness, and translucency. Wear tests were performed in a chewing simulator using human cusps as counterbodies. Tests were also performed in glazed zirconia for comparison. 25% ZrO2 leads to the lowest wear of the tribological pair among the studied systems, except 100% ZrO2. This can be attributed to the toughening effect of zirconia and reduced size of third body particles. Abrasion was the main wear mechanism observed in this pair. In addition, this was the composite that presented the highest translucency.

Publication details

Authors in the community:

Publication version

VoR - Version of Record

Publisher

Elsevier

Link to the publisher's version

https://www.sciencedirect.com/science/article/pii/S0272884221033988

Title of the publication container

Ceramics International

First page or article number

4604

Last page

4613

Volume

48

Issue

4

DOI

10.1016/j.ceramint.2021.10.247

Fields of Science and Technology (FOS)

materials-engineering - Materials engineering

Keywords

  • Leucite
  • Zirconia
  • Composites
  • Chewing simulator
  • Tribological behaviour
  • Wear

Publication language (ISO code)

eng - English

Rights type:

Only metadata available