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Early short-term postoperative mechanical failures of current ceramic-on-ceramic bearing total hip arthroplasties

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Fernández Fairén, Mariano
Torres Pérez, Ana
Pérez Antoñanzas, Román
Punset Fuste, MiquelMés informacióMés informacióMés informació
Molmeneu Trias, MeritxellMés informacióMés informacióMés informació
Ortiz Hernández, MónicaMés informació
Manero Planella, José MaríaMés informacióMés informacióMés informació
Gil Mur, Javier
CovenanteeUniversitat Internacional de Catalunya; Hospital General Universitario Santa Lucía
Document typeArticle
Defense date2020-11-24
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Although ceramic-on-ceramic (CoC) bearings have been shown to produce the smallest amount of wear volume in vitro as well as in vivo studies when used for total hip arthroplasties (THA), concerns about the failure of these bearing surfaces persist due to early failures observed after short postoperative time. In this study, an exhaustive analysis of the early failure occurred on the new generation of ceramic bearings, consisting of a composite alumina matrix-based material reinforced with yttria-stabilized tetragonal zirconia (Y-TZP) particles, chromium dioxide, and strontium crystals, was performed. For this study, 118 CoC bearings from 117 patients were revised. This article describes a group of mechanical failure CoC-bearing BIOLOX THA hip prosthesis patients without trauma history. The retrieved samples were observed under scanning electron microscopy (SEM), composition was analyzed with energy dispersive X-ray spectroscopy (EDX), and damaged surfaces were analyzed by grazing-incidence X-ray diffraction (GI-XRD) and white light interferometry. In the short term, CoC articulations provided similar mechanical behavior and functional outcome to those in XLPE cases. However, 5% more early mechanical failures cases were observed for the ceramic components. Although the fracture rate of third generation CoC couples is low, the present study shows the need to further improve the third generation of CoC-bearing couples for THA. Despite the improved wear compared to other materials, stress concentrators are sources of initial crack propagation, such as those found in the bore-trunnion areas. Moreover, in view of the evidence observed in this study, the chipping observed was due to the presence of monoclinic phase of the Y-TZP instead of tetragonal, which presents better mechanical properties. The results showed that total safety after receiving a THA is still a goal to be pursued.
CitationFernández-Fairén, M. [et al.]. Early short-term postoperative mechanical failures of current ceramic-on-ceramic bearing total hip arthroplasties. "Materials", 24 Novembre 2020, vol. 13, núm. 23, p. 5318:1-5318:14. 
URIhttp://hdl.handle.net/2117/334467
DOI10.3390/ma13235318
ISSN1996-1944
Publisher versionhttps://www.mdpi.com/1996-1944/13/23/5318
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  • Departament de Ciència i Enginyeria de Materials - Articles de revista [515]
  • BBT - Biomaterials, Biomecànica i Enginyeria de Teixits - Articles de revista [369]
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