Special Issue "Corrosion and Tribology of Biomaterials Used in Hip and Knee Arthroplasty"
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: closed (15 April 2017)
In the orthopedics field, the necessity to wear a prosthesis is a significant clinical problem that sadly too many patients have to adapt to.
Careful evaluation of the clinical data available is required in order to fully assess existing strengths and weaknesses and improve the quality and outcomes in hip/knee replacements. Patients needing arthroplasty have become and continue to become younger. Each year there are over a million cases of patients requiring hip and knee arthroplasty, therefore implants and materials used must be of a highly durable quality, particularly as regards wear resistance. Total joint arthroplasty should be based on extensive research and clinical trials in order to obtain the best possible results. During the last two decades new implant designs, articulating bearings, implant modalities, kinematic concepts and surgical treatments have been put forward, but not all of them have proven beneficial with regard to appropriate in vivo service, patient satisfaction and clinical outcomes. Dedicated corrosion tests and tribological considerations of biomaterials used in this field would provide more knowledge about the complex implant–body-interactions and provide valuable input on implant design, material degradation and adverse side effects in vivo, to create sustainable arthroplasty technologies for the future.
Dr. Saverio Affatato
Manuscript Submission Information
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- Finite Element Model
- Hip simulation
- Knee simulation
- Raman spectroscopy
- Micro-CT analyses
- Particle debris
- Biological media
The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.
Author: Jérôme Chevalier
Abstract: The current study focuses on the analysis of Zirconia Toughened Alumina (ZTA) femoral heads following in vitro tests. Three sources potentially leading to degradation were investigated: shocks, friction and hydrothermal ageing. Shocks due to micro-separation created the main damage with the formation of wear stripes on the femoral head surfaces. AFM images suggested the release of wear debris of various shapes and sizes through inter- and intra-granular fractures. Debris may have an average size lower than hundred nm. A decrease of ~10% in hardness was measured within the wear stripes by nanoindentation technique (the Young’s modulus remained unchanged) and was attributed to the presence of micro-cracks, detectable on cross-section planes by DB-FIB microscope. The formation and propagation of micro-cracks were controlled by toughening mechanisms associated with zirconia phase transformation; this presumably prevented the risk of rupture. In comparison with shocks, friction caused little wear degradation from AFM images. It is symbolized by a few pull-outs of grains. The as-formed composite material confirmed its long-term stability against hydrothermal aging.