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Hip joint tribology

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https://www.readbyqxmd.com/read/27736716/a-testing-protocol-combining-shocks-hydrothermal-ageing-and-friction-applied-to-zirconia-toughened-alumina-zta-hip-implants
#1
Armelle Perrichon, Bruno Reynard, Laurent Gremillard, Jérôme Chevalier, Frédéric Farizon, Jean Geringer
Ceramics are materials of choice for hip joint implants because of their excellent biocompatibility and mechanical properties. Wear of the bearing couple (femoral head and cup) remains one of the main concerns of hip implants. Although ceramics are known for their good tribological properties, shocks due to micro-separation, friction and hydrothermal ageing in physiological environment remain the three main sources of wear. It has been recently suggested that shock effects dominate but the three degradation mechanisms were so far simulated separately...
September 19, 2016: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27484072/-analysis-of-oxidative-damage-to-components-removed-from-beznoska-poldi-total-hip-replacements
#2
P Fulín, D Pokorný, M Šlouf, M Nevoralová, T Vacková, J Dybal, N Kaspříková, I Landor
UNLABELLED: PURPOSE OF THE STUDY Ultrahigh molecular weight polyethylene (UHMWPE) is today the most frequently used bearing surface in total joint replacements (TJR) because of its properties, i.e., excellent biocompatibility, good mechanical and tribological performance and high wear resistance. UHMWPE liners are the most loaded TJR components and, therefore, their properties are decisive for TJR longevity. This study had three objectives: 1) to evaluate the oxidative degradation of explanted UHMWPE components; 2) to look for a statistically significant relationship between the extent of oxidative degradation and the durability of joint replacements; and 3) to investigate whether the durability of a TJR was related to the type of sterilisation used in manufacture...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/27420572/lubrication-of-articular-cartilage
#3
Sabrina Jahn, Jasmine Seror, Jacob Klein
The major synovial joints such as hips and knees are uniquely efficient tribological systems, able to articulate over a wide range of shear rates with a friction coefficient between the sliding cartilage surfaces as low as 0.001 up to pressures of more than 100 atm. No human-made material can match this. The means by which such surfaces maintain their very low friction has been intensively studied for decades and has been attributed to fluid-film and boundary lubrication. Here, we focus especially on the latter: the reduction of friction by molecular layers at the sliding cartilage surfaces...
July 11, 2016: Annual Review of Biomedical Engineering
https://www.readbyqxmd.com/read/27409127/-scientific-assessment-of-350-failed-metasul-ldh%C3%A2-hip-prostheses-with-durom%C3%A2-acetabulum-component-with-probable-conus-insufficiency-implanted-in-a-single-centre-during-2003-to-2008
#4
D Brauers, M Rütschi, G Pagenstert
Introduction: The revision rates were high for patients with Metasul-LDH® hip prosthesis (LDH = large-diameter head) with DUROM® acetabulum components implanted in a single centre between 2003 and 2008. This suggested that there was a system-related weakness in total hip replacements with large diameter heads. It was suspected that the tapered connection between head and stem was responsible for the implantation failure. This led to a scientific reappraisal of the unsuccessful hip prostheses, in order to clarify whether there was a tribological problem or a cone failure...
July 13, 2016: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/27160559/influence-of-hip-joint-simulator-design-and-mechanics-on-the-wear-and-creep-of-metal-on-polyethylene-bearings
#5
Murat Ali, Mazen Al-Hajjar, Susan Partridge, Sophie Williams, John Fisher, Louise M Jennings
Hip joint simulators are used extensively for preclinical testing of hip replacements. The variation in simulator design and test conditions used worldwide can affect the tribological performance of polyethylene. The aim of this study was to assess the effects of simulator mechanics and design on the wear and creep of ultra-high-molecular-weight polyethylene. In the first part of this study, an electromechanical simulator and pneumatic simulator were used to compare the wear and creep of metal-on-polyethylene components under the same standard gait conditions...
May 2016: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/26733644/the-jumbo-acetabular-component-for-acetabular-revision-curtain-calls-and-caveats
#6
REVIEW
P F Lachiewicz, T S Watters
The 'jumbo' acetabular component is now commonly used in acetabular revision surgery where there is extensive bone loss. It offers high surface contact, permits weight bearing over a large area of the pelvis, the need for bone grafting is reduced and it is usually possible to restore centre of rotation of the hip. Disadvantages of its use include a technique in which bone structure may not be restored, a risk of excessive posterior bone loss during reaming, an obligation to employ screw fixation, limited bone ingrowth with late failure and high hip centre, leading to increased risk of dislocation...
January 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/26733634/ceramic-on-ceramic-arthroplasty-of-the-hip-new-materials-confirm-appropriate-use-in-young-patients
#7
U Sentuerk, P von Roth, C Perka
The leading indication for revision total hip arthroplasty (THA) remains aseptic loosening owing to wear. The younger, more active patients currently undergoing THA present unprecedented demands on the bearings. Ceramic-on-ceramic (CoC) bearings have consistently shown the lowest rates of wear. The recent advances, especially involving alumina/zirconia composite ceramic, have led to substantial improvements and good results in vitro. Alumina/zirconia composite ceramics are extremely hard, scratch resistant and biocompatible...
January 2016: Bone & Joint Journal
https://www.readbyqxmd.com/read/26594781/towards-near-permanent-cocrmo-prosthesis-surface-by-combining-micro-texturing-and-low-temperature-plasma-carburising
#8
Yangchun Dong, Petr Svoboda, Martin Vrbka, David Kostal, Filip Urban, Jan Cizek, Pavla Roupcova, Hanshan Dong, Ivan Krupka, Martin Hartl
An advanced surface engineering process combining micro-texture with a plasma carburising process was produced on CoCrMo femoral head, and their tribological properties were evaluated by the cutting-edge pendulum hip joint simulator coupled with thin film colorimetric interferometry. FESEM and GDOES showed that precipitation-free C S-phase with a uniform case depth of 10μm was formed across the micro-textures after duplex treatment. Hip simulator tests showed that the friction coefficient was reduced by 20% for micro-metre sized texture, and the long-term tribological property of microtexture was enhanced by the C-supersaturated crystalline microstructure formed on the surface of duplex treated CoCrMo, thereby enhancing biotribological durability significantly...
March 2015: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/25967039/effect-of-aqueous-solution-and-load-on-the-formation-of-dlc-transfer-layer-against-co-cr-mo-for-joint-prosthesis
#9
Feifei Guo, Zhifeng Zhou, Meng Hua, Guangneng Dong
Diamond-like carbon (DLC) coating exhibits excellent mechanical properties such as high hardness, low friction and wear, which offer a promising solution for the metal-on-metal hip joint implants. In the study, the hydrogen-free DLC coating with the element Cr as the interlay addition was deposited on the surface of the Co-Cr-Mo alloy by a unbalanced magnetron sputtering method. The coating thickness was controlled as 2 µm. Nano-indentation test indicated the hardness was about 13 GPa. DLC coated Co-Cr-Mo alloy disc against un-coated Co-Cr-Mo alloy pin (spherical end SR9...
September 2015: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/25874400/-ceramic-on-ceramic-bearings-in-total-hip-arthroplasty-tha
#10
U Sentürk, C Perka
The main reason for total hip arthroplasty (THA) revision is the wear-related aseptic loosening. Younger and active patients after total joint replacement create high demands, in particular, on the bearings. The progress, especially for alumina ceramic-on-ceramic bearings and mixed ceramics have solved many problems of the past and lead to good in vitro results. Modern ceramics (alumina or mixed ceramics containing alumina) are extremely hard, scratch-resistant, biocompatible, offer a low coefficient of friction, superior lubrication and have the lowest wear rates in comparison to all other bearings in THA...
April 2015: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/25704181/a-novel-tribological-study-on-dlc-coated-micro-dimpled-orthopedics-implant-interface
#11
Dipankar Choudhury, Filip Urban, Martin Vrbka, Martin Hartl, Ivan Krupka
This study investigates a tribological performance of diamond like carbon (DLC) coated micro dimpled prosthesis heads against ceramic cups in a novel pendulum hip joint simulator. The simulator enables determining friction coefficient and viscous effects of a concave shaped specimen interface (conformal contact). Two types of DLC such as hydrogenated amorphous carbon (a-C:H) and tetrahedral amorphous carbon (Ta-C) and one set of micro dimple (diameter of 300µm, depth of 70µm, and pitch of 900µm) were fabricated on metallic prosthesis heads...
May 2015: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/25621213/biotribology-of-artificial-hip-joints
#12
REVIEW
Francesca Di Puccio, Lorenza Mattei
Hip arthroplasty can be considered one of the major successes of orthopedic surgery, with more than 350000 replacements performed every year in the United States with a constantly increasing rate. The main limitations to the lifespan of these devices are due to tribological aspects, in particular the wear of mating surfaces, which implies a loss of matter and modification of surface geometry. However, wear is a complex phenomenon, also involving lubrication and friction. The present paper deals with the tribological performance of hip implants and is organized in to three main sections...
January 18, 2015: World Journal of Orthopedics
https://www.readbyqxmd.com/read/25220737/fabrication-and-characterization-of-dlc-coated-microdimples-on-hip-prosthesis-heads
#13
Dipankar Choudhury, Hee Ay Ching, Azuddin Bin Mamat, Jan Cizek, Noor Azuan Abu Osman, Martin Vrbka, Martin Hartl, Ivan Krupka
Diamond like carbon (DLC) is applied as a thin film onto substrates to obtain desired surface properties such as increased hardness and corrosion resistance, and decreased friction and wear rate. Microdimple is an advanced surface modification technique enhancing the tribological performance. In this study, DLC coated microdimples were fabricated on hip prosthesis heads and their mechanical, material and surface properties were characterized. An Electro discharge machining (EDM) oriented microdrilling was utilized to fabricate a defined microdimple array (diameter of 300 µm, depth of 70 µm, and pitch of 900 µm) on stainless steel (SS) hip prosthesis heads...
July 2015: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/25063180/study-of-the-effect-of-the-silver-content-on-the-structural-and-mechanical-behavior-of-ag-zrcn-coatings-for-orthopedic-prostheses
#14
I Ferreri, V Lopes, S Calderon V, C J Tavares, A Cavaleiro, S Carvalho
With the increase of elderly population and health problems that are arising nowadays, hip joint prostheses are being widely used. However, it is estimated that 20% of hip replacement surgeries simply fails after few years, mainly due to wear fatigue. Bearing this in mind, this work reports on the development of new coatings that are able to sustain long and innocuous life inside the patient, which will confer to the usual biomaterials improved physical, mechanical and tribological properties. In particular, the development of multifunctional coatings based on Ag-ZrCN, prepared by DC reactive magnetron sputtering using two targets, Zr and a modified Zr target, in an Ar+C2H2+N2 atmosphere...
September 2014: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/24980639/what-is-the-trouble-with-trunnions
#15
REVIEW
Christina I Esposito, Timothy M Wright, Stuart B Goodman, Daniel J Berry
BACKGROUND: Recent studies have attributed adverse local tissue reactions (ALTRs) in patients with total hip arthroplasties (THAs) to tribocorrosion debris generated by modular femoral stems. The presentations of ALTR are diverse, as are the causes of it, and the biological responses can be important reasons for failure after THA. QUESTION/PURPOSES: (1) What clinical problems have been reported in patients with modular stems since 1988? (2) What THA design features are associated with tribocorrosion in taper junctions? (3) What are the microscopic and tribological characteristics of the debris produced at the taper junctions? (4) What are the cellular and immunological traits of the biological response to taper tribocorrosion debris? METHODS: We conducted a systematic review using MEDLINE and EMBASE-cited articles to summarize failure modes associated with modular femoral stems...
December 2014: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/24941407/design-of-a-tribocorrosion-bioreactor-for-the-analysis-of-immune-cell-response-to-in-situ-generated-wear-products
#16
Robin Pourzal, R Cichon, M T Mathew, C A Pacione, A Fischer, Nadim James Hallab, Markus Wimmer
Adverse local tissue reactions to wear debris and corrosion products have lead to a sharp decline in the use of metal-on-metal (MOM) total hip athroplasties (THAs) clinically. Today, approximately 1 million patients are still carrying such a device. To gain a better understanding of the effect of wear and corrosion products on cells within the joint environment, it is important to generate conditions in vitro that resemble the in vivo system as closely as possible. In this paper, we present a novel tribocorrosion bioreactor that enables the simultaneous conduction of tribocorrosion and cell-culture experiments...
2014: Journal of Long-term Effects of Medical Implants
https://www.readbyqxmd.com/read/24822088/outcomes-of-dual-modular-cementless-femoral-stems-in-revision-hip-arthroplasty
#17
REVIEW
Ali Ghoz, Matthew L Broadhead, John Morley, Shawn Tavares, David McDonald
With an increasing number of primary hip replacements being performed every year, the burden of revision hip arthroplasty, for septic and aseptic loosening, recurrent dislocation or periprosthetic fracture, is also increasing. In recent years, different approaches to revising the femoral prosthesis have emerged; including both cemented and cementless techniques. With a stable cement mantle and good bone quality, or through the use of impaction bone grafting when bone stock is lacking, it is possible to re-cement a femoral prosthesis...
January 20, 2014: Orthopedic Reviews
https://www.readbyqxmd.com/read/24650021/retrieval-analysis-of-alumina-ceramic-on-ceramic-bearing-couples
#18
Muhammad Korim, Susan Scholes, Anthony Unsworth, Richard Power
BACKGROUND AND PURPOSE: Ceramic-on-ceramic (CoC) bearings have been in use in total hip replacement (THR) for more than 40 years, with excellent long-term survivorship. Although there have been several simulator studies describing the performance of these joints, there have only been a few retrieval analyses. The aim of this study was to investigate the wear patterns, the surface properties, and friction and lubrication regimes of explanted first-generation alumina bearings. MATERIALS AND METHODS: We studied 9 explanted CoC bearings from Autophor THRs that were revised for aseptic loosening after a mean of 16 (range 7-19) years...
April 2014: Acta Orthopaedica
https://www.readbyqxmd.com/read/24462265/on-the-matter-of-synovial-fluid-lubrication-implications-for-metal-on-metal-hip-tribology
#19
REVIEW
Connor Myant, Philippa Cann
Artificial articular joints present an interesting, and difficult, tribological problem. These bearing contacts undergo complex transient loading and multi axes kinematic cycles, over extremely long periods of time (>10 years). Despite extensive research, wear of the bearing surfaces, particularly metal-metal hips, remains a major problem. Comparatively little is known about the prevailing lubrication mechanism in artificial joints which is a serious gap in our knowledge as this determines film formation and hence wear...
June 2014: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/24356820/-complications-of-metal-on-metal-tribological-pairing
#20
M Stiehler, F Zobel, F Hannemann, J Schmitt, J Lützner, S Kirschner, K-P Günther, A Hartmann
BACKGROUND: Metal-on-metal (MoM) tribological pairing results in less volumetric abrasion than pairing with the conventionally used polyethylene and is associated with a lower risk of material failure compared to other hard-hard pairings. An increased frequency of problem cases in recent years has led to a great increase in uncertainty. Against this background in this article the current aspects of epidemiology, etiology, diagnostics and treatment of complications in MoM hip joint endoprostheses will be discussed...
January 2014: Der Orthopäde
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