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Manjunath V, Badhe RV, McCoy M, Rynne J, Bhatti A, Segu A, Oral E, Jacobs JJ, Chastain P, Bijukumar D, Mathew MT. The role of Vitamin E in hip implant-related corrosion and toxicity: Initial outcome. J Mech Behav Biomed Mater 2021; 123:104769. [PMID: 34412025 PMCID: PMC10559727 DOI: 10.1016/j.jmbbm.2021.104769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 07/27/2021] [Accepted: 08/07/2021] [Indexed: 10/20/2022]
Abstract
In orthopedic healthcare, Total Hip Replacement (THR) is a common and effective solution to hip-related bone and joint diseases/fracture; however, corrosion of the hip implant and the release of degradation metal ions/particles can lead to early implant failure and pose potential toxicity risk for the surrounding tissues. The main objective of this work was to investigate the potential role of Vitamin E to minimize corrosion-related concerns from CoCrMo hip implants. The study focused on two questions (i) Can Vitamin E inhibit CoCrMo corrosion? and (ii) Does Vitamin E moderate the toxicity associated with the CoCrMo implant particles? In the study (i) the electrochemical experiments (ASTM G61) with different concentrations of Vitamin E (1, 2, 3 mg/ml against the control) were performed using normal saline and simulated synovial fluid (Bovine calf serum-BCS, 30 g/L protein, pH 7.4) as electrolytes. The polished CoCrMo disc (Ra 50 nm) was the working electrode. The findings suggested that both Vitamin E-Saline (45 ± 0.9%) and Vitamin E-BCS (91 ± 3%) solutions protected against implant corrosion at a Vitamin E concentration of 3 mg/ml, but Vitamin E-BCS showed protection at all Vitamin E (1-3 mg/ml) concentration levels. These results suggested that the Vitamin E and the protein present in the BCS imparted additive effects towards the electrochemical inhibition. In the study (ii) the role of Vitamin E in cytotoxicity inhibition was studied using a mouse neuroblastoma cell line (N2a) for CoCrMo particles and Cr ions separately. The CoCrMo particles were generated from a custom-built hip simulator. The alamarBlue assay results suggested that Vitamin E provides significant protection (85% and 75% proliferation) to N2a cells against CoCrMo particles and Cr ions, respectively at 1 μg/ml concentration, as compared to the control group. However, the results obtained from ROS expression and DNA fiber staining suggest that Vitamin E is only effective against CoCrMo degradation particles and not against Cr ions. In summary, the findings show that Vitamin E can minimize the corrosion processes and play a role in minimizing the potential toxicity associated with implants.
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Affiliation(s)
- Vikas Manjunath
- Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL, USA
| | - Ravindra V Badhe
- Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL, USA
| | - Maureen McCoy
- Department of Biochemistry, University of Illinois, Urbana-Champaign, IL, USA
| | - Josiah Rynne
- Department of Mechanical Science and Engineering, University of Illinois, Urbana-Champaign, IL, USA
| | - Aisha Bhatti
- Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL, USA
| | - Abhijith Segu
- Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL, USA
| | - Ebru Oral
- Department of Orthopedic Surgery, Harvard Medical School, Boston, MA, USA
| | - Joshua J Jacobs
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA
| | - Paul Chastain
- Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL, USA
| | - Divya Bijukumar
- Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL, USA
| | - Mathew T Mathew
- Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL, USA.
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Wang X, Han X, Li C, Chen Z, Huang H, Chen J, Wu C, Fan T, Li T, Huang W, Al-Hartomy OA, Al-Ghamdi A, Wageh S, Zheng F, Al-Sehemi AG, Wang G, Xie Z, Zhang H. 2D materials for bone therapy. Adv Drug Deliv Rev 2021; 178:113970. [PMID: 34509576 DOI: 10.1016/j.addr.2021.113970] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/24/2021] [Accepted: 09/07/2021] [Indexed: 12/12/2022]
Abstract
Due to their prominent physicochemical properties, 2D materials are broadly applied in biomedicine. Currently, 2D materials have achieved great success in treating many diseases such as cancer and tissue engineering as well as bone therapy. Based on their different characteristics, 2D materials could function in various ways in different bone diseases. Herein, the application of 2D materials in bone tissue engineering, joint lubrication, infection of orthopedic implants, bone tumors, and osteoarthritis are firstly reviewed comprehensively together. Meanwhile, different mechanisms by which 2D materials function in each disease reviewed below are also reviewed in detail, which in turn reveals the versatile functions and application of 2D materials. At last, the outlook on how to further broaden applications of 2D materials in bone therapies based on their excellent properties is also discussed.
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Affiliation(s)
- Xiangjiang Wang
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan 511518, Guangdong, China
| | - Xianjing Han
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan 511518, Guangdong, China
| | - Chaozhou Li
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Zhi Chen
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Hao Huang
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jindong Chen
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan 511518, Guangdong, China
| | - Chenshuo Wu
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Taojian Fan
- College of Health Science and Environmental Engineering, Shenzhen Technology University, Shenzhen 518118, China
| | - Tianzhong Li
- Shenzhen International Institute for Biomedical Research, Shenzhen 518116, Guangdong, China
| | - Weichun Huang
- Nantong Key Lab of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, Jiangsu, PR China
| | - Omar A Al-Hartomy
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ahmed Al-Ghamdi
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Swelm Wageh
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Fei Zheng
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Abdullah G Al-Sehemi
- Department of Chemistry, Faculty of Science, Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia
| | - Guiqing Wang
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, Qingyuan 511518, Guangdong, China
| | - Zhongjian Xie
- Institute of Pediatrics, Shenzhen Children's Hospital, Shenzhen 518038, Guangdong, PR China; Shenzhen International Institute for Biomedical Research, Shenzhen 518116, Guangdong, China
| | - Han Zhang
- Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics, International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
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Damm P, Bender A, Waldheim V, Winkler T, Duda GN. Surgical cup placement affects the heating up of total joint hip replacements. Sci Rep 2021; 11:15851. [PMID: 34349160 PMCID: PMC8338953 DOI: 10.1038/s41598-021-95387-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 07/07/2021] [Indexed: 11/16/2022] Open
Abstract
The long-term success of highly effective total hip arthroplasty (THA) is mainly restricted by aseptic loosening, which is widely associated with friction between the head and cup liner. However, knowledge of the in vivo joint friction and resulting temperature increase is limited. Employing a novel combination of in vivo and in silico technologies, we analyzed the hypothesis that the intraoperatively defined implant orientation defines the individual joint roofing, friction and its associated temperature increase. A total of 38,000 in vivo activity trials from a special group of 10 subjects with instrumented THA implants with an identical material combination were analyzed and showed a significant link between implant orientation, joint kinematics, joint roofing and friction-induced temperature increase but surprisingly not with acting joint contact force magnitude. This combined in vivo and in silico analysis revealed that cup placement in relation to the stem is key to the in vivo joint friction and heating-up of THA. Thus, intraoperative placement, and not only articulating materials, should be the focus of further improvements, especially for young and more active patients.
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Affiliation(s)
- Philipp Damm
- Berlin Institute of Health at Charité-Universitätsmedizin Berlin, Julius Wolff Institute, Berlin, Germany.
| | - Alwina Bender
- Berlin Institute of Health at Charité-Universitätsmedizin Berlin, Julius Wolff Institute, Berlin, Germany
| | - Vivian Waldheim
- Berlin Institute of Health at Charité-Universitätsmedizin Berlin, Julius Wolff Institute, Berlin, Germany
| | - Tobias Winkler
- Berlin Institute of Health at Charité-Universitätsmedizin Berlin, Julius Wolff Institute, Berlin, Germany
- Center for Musculoskeletal Surgery, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Berlin Institute of Health Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Georg N Duda
- Berlin Institute of Health at Charité-Universitätsmedizin Berlin, Julius Wolff Institute, Berlin, Germany
- Berlin Institute of Health Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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Patnaik L, Maity SR, Kumar S. Effect of lubricated sliding wear against CFRPEEK on the nanomechanical properties of Ag alloyed Cr/DLC thin film. J Mech Behav Biomed Mater 2021; 118:104478. [PMID: 33770586 DOI: 10.1016/j.jmbbm.2021.104478] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 03/10/2021] [Accepted: 03/15/2021] [Indexed: 01/21/2023]
Abstract
Ag-doped Cr/DLC coatings were deposited on medical grade 316 LVM stainless steel using DC magnetron sputtering. Morphological study of the coating indicated the formation of island of Ag clusters owing to the inability of Ag to form carbides, which is also corroborated from the XRD analysis. The composite coating showcased elastic nature suggestive from the p-h curve obtained from the nanoindentation test. However, the coating possesses 33% ductility, which is an important virtue for stress relieving attributed to Ag in the carbon matrix. The coating registered improved adhesion due to Cr3C2 carbide formation in the interlayer. The composite coating was subjected to lubricated sliding in physiological fluid against carbon fiber reinforced PEEK (CFRPEEK) friction pair to realize a closer scenario to hip implant articulation. A lubricious film of Ag with scattered particles of PEEK was formed in the sliding interface resulting in a long run-in process during sliding. The composite coating suffered mild wear on the Ag-doped DLC top layer with few gullies of wear scar deep into the interlayer due to graphitization of carbon in the film. A statistically significant difference was observed in the hardness, H3/E2, elastic work, and plastic work; however, there was no statistically significant difference in H/E attribute between the unworn and worn surface. What is more, Raman spectra of the worn (ID/IG = 1.9 ± 0.2) and unworn surface (ID/IG = 2.1 ± 0.1) were indicative of no significant loss in the structural integrity of the composite coating.
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Affiliation(s)
- Lokeswar Patnaik
- Department of Mechanical Engineering, National Institute of Technology Silchar, Assam- 788 010, India.
| | - Saikat Ranjan Maity
- Department of Mechanical Engineering, National Institute of Technology Silchar, Assam- 788 010, India
| | - Sunil Kumar
- Department of Mechanical Engineering, National Institute of Technology Silchar, Assam- 788 010, India
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Nečas D, Sadecká K, Vrbka M, Galandáková A, Wimmer MA, Gallo J, Hartl M. The effect of albumin and γ-globulin on synovial fluid lubrication: Implication for knee joint replacements. J Mech Behav Biomed Mater 2020; 113:104117. [PMID: 33065468 DOI: 10.1016/j.jmbbm.2020.104117] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 08/31/2020] [Accepted: 09/24/2020] [Indexed: 02/07/2023]
Abstract
Total knee arthroplasty has become a routine procedure for patients suffering from joint diseases. Although the number of operations continuously increases, a limited service-life of implants represents a persisting challenge for scientists. Understanding of lubrication may help to suitably explain tribological processes on the way to replacements that become durable well into the third decade of service. The aim of the present study is to assess the formation of protein lubricating film in the knee implant. A developed knee simulator was used to observe the contact of real femoral and transparent polymer tibial component using fluorescent microscopy. The contact was lubricated by various protein solutions with attention to the behaviour of albumin and γ-globulin. In order to suitably mimic a human synovial fluid, hyaluronic acid and phospholipids were subsequently added to the solutions. Further, the change in shape and the migration of the contact zone were studied. The results showed considerable appearance differences of the contact over the swing phase of the simplified gait cycle. Regarding film formation, a strong interaction of the various molecules of synovial fluid was observed. It was found that the thickness of the lubricating layer stabilizes within around 50 s. Throughout the contact zone, protein agglomerations were present and could be clearly visualised using the applied optical technique.
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Affiliation(s)
- D Nečas
- Dept of Tribology, Faculty of Mechanical Engineering, Brno University of Technology, Czech Republic.
| | - K Sadecká
- Dept of Tribology, Faculty of Mechanical Engineering, Brno University of Technology, Czech Republic
| | - M Vrbka
- Dept of Tribology, Faculty of Mechanical Engineering, Brno University of Technology, Czech Republic
| | - A Galandáková
- Dept of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University Olomouc, Czech Republic
| | - M A Wimmer
- Dept of Orthopedic Surgery, Rush University Medical Center, Chicago, IL, USA
| | - J Gallo
- Dept of Orthopaedics, Faculty of Medicine and Dentistry, Palacky University Olomouc, University Hospital Olomouc, Czech Republic
| | - M Hartl
- Dept of Tribology, Faculty of Mechanical Engineering, Brno University of Technology, Czech Republic
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Montes-seguedo JL, Garcia-garcia AL, Barceinas-sanchez JDO, Sosa-savedra JC, Morales-garcia MRJ, Gonzalez-jasso E, Dominguez-lopez I. Mapping the friction coefficient of AISI 316L on UHMWPE lubricated with bovine serum to study the effect of loading and entrainment at high values of sliding-to-rolling ratio. Health Technol 2020; 10:385-90. [DOI: 10.1007/s12553-019-00355-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Fu J, Ni M, Chai W, Li X, Hao L, Chen J. Synovial Fluid Viscosity Test is Promising for the Diagnosis of Periprosthetic Joint Infection. J Arthroplasty 2019; 34:1197-1200. [PMID: 30837099 DOI: 10.1016/j.arth.2019.02.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/21/2019] [Accepted: 02/07/2019] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND So far there is no "gold standard" test for the diagnosis of periprosthetic joint infection (PJI), compelling clinicians to rely on several serological and synovial fluid tests with no 100% accuracy. Synovial fluid viscosity is one of the parameters defining the rheology properties of synovial fluid. We hypothesized that patients with PJI may have a different level of synovial fluid viscosity and aimed to investigate the sensitivity and specificity of synovial fluid viscosity in detecting PJI. METHODS This prospective study was initiated to enroll patients undergoing primary and revision arthroplasty. Our cohort consisted of 45 patients undergoing revision for PJI (n = 15), revision for aseptic failure (n = 15), and primary arthroplasty (n = 15). PJI was defined using the Musculoskeletal Infection Society criteria. In all patients, synovial fluid viscosity, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), and plasma d-dimer levels were measured preoperatively. RESULTS The synovial fluid viscosity level was significantly lower (P = .0011) in patients with PJI (7.93 mPa·s, range 3.0-15.0) than in patients with aseptic failure (13.11 mPa·s, range 6.3-20.4). Using Youden's index, 11.80 mPa·s was determined as the optimal threshold value for synovial fluid viscosity for the diagnosis of PJI. Synovial fluid viscosity outperformed CRP, ESR, and plasma d-dimer, with a sensitivity of 93.33% and a specificity of 66.67%. CONCLUSION Synovial fluid viscosity seems to be on the same level of accuracy with CRP, ESR, and d-dimer regarding PJI detection and to be a promising marker for the diagnosis of PJI.
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Affiliation(s)
- Jun Fu
- Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, PR China
| | - Ming Ni
- Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, PR China
| | - Wei Chai
- Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, PR China
| | - Xiang Li
- Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, PR China
| | - Libo Hao
- Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, PR China
| | - Jiying Chen
- Department of Orthopaedics, Chinese People's Liberation Army General Hospital (301 Hospital), Beijing, PR China
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Braun S, Sonntag R, Schroeder S, Mueller U, Jaeger S, Gotterbarm T, Kretzer JP. Backside wear in acetabular hip joint replacement. Acta Biomater 2019; 83:467-476. [PMID: 30408561 DOI: 10.1016/j.actbio.2018.10.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 10/30/2018] [Accepted: 10/31/2018] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Besides head-insert articulation in hip joint replacements, micro-motions between the backside of assembled polyethylene acetabular liners and the metal cup may cause additional wear. Pelvic osteolysis frequently occurs in the region of screw holes, and cup loosening hints to clinically relevant amounts of polyethylene backside wear. It has yet to be confirmed whether backside wear particles differ in size and morphology compared to articulating wear. Previous methods have been limited to subjective assessment of backside surface damages without consideration of wear debris. The aim of this study was to develop and validate a method for quantitative in vitro measurements of polyethylene backside wear in artificial hip cups and to characterize these wear particles for the first time. METHODS Titanium cup-systems (Plasmafit®Plus7, Aesculap, UHMWPE liner) were sinusoidally loaded (2.5 kN) and a torque of 5 Nm was simultaneously applied. The front and rear side of the cup were separated to isolate backside wear. After 2 × 106 cycles the surrounding fluid was filtered and a particle analysis was performed. RESULTS Backside wear had a particles size of 64.1 ± 1.9 nm and was verified as round and oval particles with partly rough outlines. An estimated total number of particles of 1.26 × 109 ± 1.67 × 108 per 106 cycles was determined. CONCLUSION Backside wear was estimated to be several times lower than published values of articulating wear. However, polyethylene backside wear particles represented significantly smaller particles with partly roughened outlines than articulating wear particles and may therefore cause higher biological response in macrophage-mediated bone resorption compared to articulated particles. STATEMENT OF SIGNIFICANCE Within this study, an analytical method for quantitative measuring polyethylene backside wear of artificial hip cups was successfully developed and validated for the first time. It could be shown that backside wear is still present, even in modern cup-systems. These findings can be further used for investigations of the osteolytic potential of polyethylene particles, for evaluating and improving new implant systems and to evaluate the effectiveness of screw hole plugs to prevent the particle migration to the acetabulum.
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Han L, Xiang L, Zhang J, Chen J, Liu J, Yan B, Zeng H. Biomimetic Lubrication and Surface Interactions of Dopamine-Assisted Zwitterionic Polyelectrolyte Coatings. Langmuir 2018; 34:11593-11601. [PMID: 30156852 DOI: 10.1021/acs.langmuir.8b02473] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A bioinspired zwitterionic polyelectrolyte coating with excellent hydration ability has been regarded as a promising lubricating candidate for modifying artificial joint cartilage surface. In physiological fluids, the ubiquitous proteins play an important role in achieving outstanding boundary lubrication; however, a comprehensive understanding of the hydration lubrication between polyelectrolyte coatings and proteins still remains unclear. In this work, a facile fabrication of ultrasmooth polyelectrolyte coatings was developed via codeposition of synthesized poly(dopamine methacrylamide- co-2-methacryloyloxyethyl phosphorylcholine) (P(DMA- co-MPC)) and dopamine (DA) in a mild condition. Upon optimization of the feeding ratio of P(DMA- co-MPC) and DA, the as-fabricated PDA/P(DMA- co-MPC) coatings exhibit excellent lubricating properties when sliding with each other (friction coefficient μ = 0.036 ± 0.002, ∼2.8 MPa), as well as sliding with a model protein (bovine serum albumin (BSA)) layer (μ = 0.041 ± 0.005, ∼4.8 MPa) in phosphate-buffered saline (PBS, pH 7.4). Intriguingly, the lubrication in both systems shows Amontons-like behaviors: the friction is directly proportional to the applied load but independent of the shear velocity. Moreover, the PDA/P(DMA- co-MPC) coatings could resist the protein fouling (i.e., BSA) in PBS, which is crucial to prevent the surfaces from being contaminated when applied in biological media, thus maintaining their lubricating properties. Our results provide a versatile approach for facilely fabricating polyelectrolyte coatings with superior lubrication properties to both polyelectrolyte coatings and protein surfaces, with useful implications into the development of novel lubricating coatings for bioengineering applications (e.g., artificial joints).
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Affiliation(s)
- Linbo Han
- College of Health Science and Environmental Engineering , Shenzhen Technology University , Shenzhen 518118 , China
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Li Xiang
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Jiawen Zhang
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Jingsi Chen
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
| | - Jifang Liu
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
- The Fifth Affiliated Hospital , Guangzhou Medical University , Guangzhou , Guangdong 510700 , China
| | - Bin Yan
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
- College of Light Industry, Textile & Food Engineering, Sichuan University , Chengdu 610065 , China
| | - Hongbo Zeng
- College of Health Science and Environmental Engineering , Shenzhen Technology University , Shenzhen 518118 , China
- Chemical and Materials Engineering , University of Alberta , Edmonton , Alberta T6G 1H9 , Canada
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Cowie RM, Briscoe A, Fisher J, Jennings LM. Wear and Friction of UHMWPE-on-PEEK OPTIMA™. J Mech Behav Biomed Mater 2019; 89:65-71. [PMID: 30265867 DOI: 10.1016/j.jmbbm.2018.09.021] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/11/2018] [Accepted: 09/17/2018] [Indexed: 12/28/2022]
Abstract
PEEK-OPTIMA™ is being considered as an alternative bearing material to cobalt chrome in the femoral component of total knee replacement to provide a metal-free implant. The aim of this study was to investigate the influence of lubricant temperature (standard rig running and elevated temperature (~36 °C)) on the wear of a UHMWPE-on-PEEK OPTIMA™ bearing couple using different lubricant protein concentrations (0%, 2%, 5%, 25% and 90% bovine serum) in a simple geometry pin-on-plate configuration. Friction was also investigated under a single temperature condition for different lubricant protein concentrations. The studies were repeated for UHMWPE-on-cobalt chrome in order to compare relationships with temperature (wear only) and lubricant protein concentration (wear and friction). In low lubricant protein concentrations (≤ 5%) there was no influence of temperature on the wear factors of UHMWPE-on-PEEK. With 25% bovine serum, the wear factor of UHMWPE-on-PEEK reduced by half at elevated temperature. When tested in high protein concentration (90% serum), there was no influence of temperature on the wear factor of UHMWPE-on-PEEK. These temperature dependencies were not the same for UHMWPE-on-cobalt chrome. For both material combinations, there was a trend of decreasing friction with increasing protein concentration once protein was present in the lubricant. This study has shown the importance of the selection of appropriate test conditions when investigating the wear and friction of different materials, in order to minimise test artefacts such as polymer transfer, and protein precipitation and deposition.
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Nečas D, Vrbka M, Křupka I, Hartl M. The Effect of Kinematic Conditions and Synovial Fluid Composition on the Frictional Behaviour of Materials for Artificial Joints. Materials (Basel) 2018; 11:E767. [PMID: 29748491 PMCID: PMC5978144 DOI: 10.3390/ma11050767] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/08/2018] [Accepted: 05/08/2018] [Indexed: 11/16/2022]
Abstract
The paper introduces an experimental investigation of frictional behaviour of materials used for joint replacements. The measurements were performed using a ball-on-disc tribometer, while four material combinations were tested; metal-on-metal, ceramic-on-ceramic, metal-on-polyethylene, and ceramic-on-polyethylene, respectively. The contact was lubricated by pure saline and various protein solutions. The experiments were realized at two mean speeds equal to 5.7 mm/s and 22 mm/s and two slide-to-roll ratios, −150% and 150%. It was found that the implant material is the fundamental parameter affecting friction. In general, the metal pair exhibited approximately two times higher friction compared to the ceramic. In particular, the friction in the case of the metal varied between 0.3 and 0.6 while the ceramic pair exhibited friction within the range from 0.15 to 0.3 at the end of the test. The lowest friction was observed for polyethylene while it decreased to 0.05 under some conditions. It can be also concluded that adding proteins to the lubricant has a positive impact on friction in the case of hard-on-hard pairs. For hard-on-soft pairs, no substantial influence of proteins was observed. The effect of kinematic conditions was found to be negligible in most cases.
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Affiliation(s)
- David Nečas
- Faculty of Mechanical Engineering, Institute of Machine and Industrial Design, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic.
| | - Martin Vrbka
- Faculty of Mechanical Engineering, Institute of Machine and Industrial Design, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic.
| | - Ivan Křupka
- Faculty of Mechanical Engineering, Institute of Machine and Industrial Design, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic.
| | - Martin Hartl
- Faculty of Mechanical Engineering, Institute of Machine and Industrial Design, Brno University of Technology, Technická 2896/2, 616 69 Brno, Czech Republic.
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Nečas D, Sawae Y, Fujisawa T, Nakashima K, Morita T, Yamaguchi T, Vrbka M, Křupka I, Hartl M. The Influence of Proteins and Speed on Friction and Adsorption of Metal/UHMWPE Contact Pair. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.biotri.2017.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Damm P, Bender A, Duda G, Bergmann G. In vivo measured joint friction in hip implants during walking after a short rest. PLoS One 2017; 12:e0174788. [PMID: 28350858 PMCID: PMC5370152 DOI: 10.1371/journal.pone.0174788] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Accepted: 03/15/2017] [Indexed: 11/18/2022] Open
Abstract
Introduction It has been suspected that friction in hip implants is higher when walking is initiated after a resting period than during continuous movement. It cannot be excluded that such increased initial moments endanger the cup fixation in the acetabulum, overstress the taper connections in the implant or increase wear. To assess these risks, the contact forces, friction moments and friction coefficients in the joint were measured in vivo in ten subjects. Instrumented hip joint implants with telemetric data transmission were used to access the contact loads between the cup and head during the first steps of walking after a short rest. Results The analysis demonstrated that the contact force is not increased during the first step. The friction moment in the joint, however, is much higher during the first step than during continuous walking. The moment increases throughout the gait cycle were 32% to 143% on average and up to 621% individually. The high initial moments will probably not increase wear by much in the joint. However, comparisons with literature data on the fixation resistance of the cup against moments made clear that the stability can be endangered. This risk is highest during the first postoperative months for cementless cups with insufficient under-reaming. The high moments after a break can also put taper connections between the head and neck and neck and shaft at a higher risk. Discussion During continuous walking, the friction moments individually were extremely varied by factors of 4 to 10. Much of this difference is presumably caused by the varying lubrication properties of the synovia. These large moment variations can possibly lead to friction-induced temperature increases during walking, which are higher than the 43.1°C which have previously been observed in a group of only five subjects.
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Affiliation(s)
- Philipp Damm
- Julius Wolff Institute, Charité–Universitätsmedizin Berlin, Berlin, Germany
- * E-mail:
| | - Alwina Bender
- Julius Wolff Institute, Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Georg Duda
- Julius Wolff Institute, Charité–Universitätsmedizin Berlin, Berlin, Germany
| | - Georg Bergmann
- Julius Wolff Institute, Charité–Universitätsmedizin Berlin, Berlin, Germany
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Safari A, Espanol M, Ginebra M, Cervantes MJ, Emami N. Effect of dynamic loading versus static loading on the frictional behavior of a UHMWPE pin in artificial biolubricants. Biosurface and Biotribology 2017; 3:35-44. [DOI: 10.1016/j.bsbt.2017.03.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Abstract
Metal-on-metal articulations have fallen out of favour in larger joint replacements, but are still used in smaller joints. Coating the articulation has been suggested as one way of reducing wear. We compared a standard 6 mm CrCoMo articulation designed for the carpometacarpal joint of the thumb with a chromium nitride-coated version after 512,000 cycles in a joint simulator. A total of 6 articulations in each group were tested with a unidirectional load of 5 kg in Ringer's solution. We found a statistically significant reduction in weight loss, amount of metallic wear produced and volumetric wear for the chromium nitride-coated articulation. Our findings support the use of chromium nitride coating in order to minimize the amount of metallic wear produced.
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Affiliation(s)
- R Thorkildsen
- 1 Orthopaedic Department, University Hospital of Oslo, Oslo, Norway
| | - O Reigstad
- 1 Orthopaedic Department, University Hospital of Oslo, Oslo, Norway
| | - M Røkkum
- 1 Orthopaedic Department, University Hospital of Oslo, Oslo, Norway.,2 University of Oslo, Oslo, Norway
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Scholes SC, Hunt BJ, Richardson VM, Langton DJ, Smith E, Joyce TJ. Explant analysis of the Biomet Magnum/ReCap metal-on-metal hip joint. Bone Joint Res 2017; 6:113-122. [PMID: 28246095 PMCID: PMC5331178 DOI: 10.1302/2046-3758.62.bjr-2016-0130.r2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 12/08/2016] [Indexed: 12/05/2022] Open
Abstract
Objectives The high revision rates of the DePuy Articular Surface Replacement (ASR) and the DePuy ASR XL (the total hip arthroplasty (THA) version) have led to questions over the viability of metal-on-metal (MoM) hip joints. Some designs of MoM hip joint do, however, have reasonable mid-term performance when implanted in appropriate patients. Investigations into the reasons for implant failure are important to offer help with the choice of implants and direction for future implant designs. One way to assess the performance of explanted hip prostheses is to measure the wear (in terms of material loss) on the joint surfaces. Methods In this study, a coordinate measuring machine (CMM) was used to measure the wear on five failed cementless Biomet Magnum/ReCap/ Taperloc large head MoM THAs, along with one Biomet ReCap resurfacing joint. Surface roughness measurements were also taken. The reason for revision of these implants was pain and/or adverse reaction to metal debris (ARMD) and/or elevated blood metal ion levels. Results The mean wear rate of the articulating surfaces of the heads and acetabular components of all six joints tested was found to be 6.1 mm3/year (4.1 to 7.6). The mean wear rate of the femoral head tapers of the five THAs was 0.054 mm3/year (0.021 to 0.128) with a mean maximum wear depth of 5.7 µm (4.3 to 8.5). Conclusion Although the taper wear was relatively low, the wear from the articulating surfaces was sufficient to provide concern and was potentially large enough to have been the cause of failure of these joints. The authors believe that patients implanted with the ReCap system, whether the resurfacing prosthesis or the THA, should be closely monitored. Cite this article: S. C. Scholes, B. J. Hunt, V. M. Richardson, D. J. Langton, E. Smith, T. J. Joyce. Explant analysis of the Biomet Magnum/ReCap metal-on-metal hip joint. Bone Joint Res 2017;6:113–122. DOI: 10.1302/2046-3758.62.BJR-2016-0130.R2.
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Affiliation(s)
- S C Scholes
- School of Mechanical and Systems Engineering, Newcastle University, Claremont Road, Newcastle-upon-Tyne, NE1 7RU, UK
| | - B J Hunt
- School of Mechanical and Systems Engineering, Newcastle University, Claremont Road, Newcastle-upon-Tyne, NE1 7RU, UK
| | - V M Richardson
- School of Mechanical and Systems Engineering, Newcastle University, Claremont Road, Newcastle-upon-Tyne, NE1 7RU, UK
| | - D J Langton
- Freeman Hospital, Newcastle-upon-Tyne, NE7 7DN, UK
| | - E Smith
- Avon Orthopaedic Centre, North Bristol NHS Trust, Southmead Hospital, Westbury-on-Trym, Bristol, BS10 5NB, UK
| | - T J Joyce
- School of Mechanical and Systems Engineering, Newcastle University, Claremont Road, Newcastle-upon-Tyne, NE1 7RU, UK
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Scholl L, Longaray J, Raja L, Lee R, Faizan A, Herrera L, Thakore M, Nevelos J. Friction in modern total hip arthroplasty bearings: Effect of material, design, and test methodology. Proc Inst Mech Eng H 2016; 230:50-7. [PMID: 26721426 DOI: 10.1177/0954411915619452] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to characterize the effect of a group of variables on frictional torque generated by acetabular components as well as to understand the influence of test model. Three separate test models, which had been previously used in the literature, were used to understand the effect of polyethylene material, bearing design, head size, and material combinations. Each test model differed by the way it simulated rotation of the head, the type of frictional torque value it reported (static vs. dynamic), and the type of motion simulated (oscillating motion vs. continuous motion). It was determined that not only test model may impact product ranking of fictional torque generated but also static frictional torque may be significantly larger than a dynamic frictional torque. In addition to test model differences, it was discovered that the frictional torque values for conventional and highly cross-linked polyethylenes were not statistically significantly different in the more physiologically relevant test models. With respect to bearing design, the frictional torque values for mobile bearing designs were similar to the 28-mm diameter inner bearing rather than the large diameter outer liner. Testing with a more physiologically relevant rotation showed that frictional torque increased with bearing diameter for the metal on polyethylene and ceramic on polyethylene bearings but remained constant for ceramic on ceramic bearings. Finally, ceramic on ceramic bearings produced smaller frictional torque values when compared to metal on polyethylene and ceramic on polyethylene groups.
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Nečas D, Vrbka M, Křupka I, Hartl M, Galandáková A. Lubrication within hip replacements – Implication for ceramic-on-hard bearing couples. J Mech Behav Biomed Mater 2016; 61:371-83. [DOI: 10.1016/j.jmbbm.2016.04.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/30/2016] [Accepted: 04/01/2016] [Indexed: 11/23/2022]
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Cui Z, Tian YX, Yue W, Yang L, Li Q. Tribo-biological deposits on the articulating surfaces of metal-on-polyethylene total hip implants retrieved from patients. Sci Rep 2016; 6:28376. [PMID: 27345704 DOI: 10.1038/srep28376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 06/03/2016] [Indexed: 11/08/2022] Open
Abstract
Artificial total hip arthroplasty (THA) is one of the most effective orthopaedic surgeries that has been used for decades. However, wear of the articulating surfaces is one of the key failure causes limiting the lifetime of total hip implant. In this paper, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) were employed to explore the composition and formation mechanism of the tribo-layer on the articulating surfaces of metal-on-polyethylene (MoPE) implants retrieved from patients. Results showed that, in contrast to conventional understanding, the attached tribo-layer contained not only denatured proteins but also a fraction of polymer particles. The formation of the tribo-layer was believed to relate to lubrication regime, which was supposed to be largely affected by the nature of the ultra-high-molecule-weight-polyethylene (UHMWPE). Wear and formation of tribo-layer could be minimized in elasto-hydrodynamic lubrication (EHL) regime when the UHMWPE was less stiff and have a morphology containing micro-pits; whereas the wear was more severe and tribo-layer formed in boundary lubrication. Our results and analyses suggest that enhancing interface lubrication may be more effective on reducing wear than increasing the hardness of material. This finding may shed light on the design strategy of artificial hip joints.
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Haider H, Weisenburger JN, Garvin KL. Simultaneous measurement of friction and wear in hip simulators. Proc Inst Mech Eng H 2016; 230:373-88. [DOI: 10.1177/0954411916644476] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 03/02/2016] [Indexed: 11/15/2022]
Abstract
We propose and have evaluated a method to measure hip friction during wear testing on a popular multi-station hip simulator. A 6-degree-of-freedom load cell underneath the specimen sensed forces and torques during implant wear testing of simulated walking. This included internal–external and adduction–abduction rotations which are often neglected during friction testing on pendulum-type machines. Robust mathematical analysis and data processing provided friction estimates in three simultaneous orthogonal rotations, over extended multi-million cycle wear tests. We tested various bearing couples including metal-on-plastic, ceramic-on-plastic, and metal-on-metal material couples. In one test series, new and intentionally scratched CoCrMo 40-mm-diameter femoral heads were tested against conventional ultrahigh-molecular-weight polyethylene, highly cross-linked, and highly cross-linked with vitamin E versions. The scratching significantly increased friction and doubled the wear of all groups. Before scratching, friction levels for the aforementioned plastic groups were 0.056 ± 0.0060, 0.062 ± 0.0080, and 0.070 ± 0.0045, respectively, but after scratching increased to 0.088 ± 0.018, 0.076 ± 0.0066, and 0.082 ± 0.0049, respectively, all statistically significant increases (p = 0.00059, 0.00005, 0.0115, respectively). In another test series of 44-mm femoral head diameter hips, metal-on-plastic hips with conventional ultrahigh-molecular-weight polyethylene showed the lowest friction at 0.045 ± 0.0085, followed by highly cross-linked with 0.046 ± 0.0035 (not significantly different). In a ceramic-on-plastic design with conventional ultrahigh-molecular-weight polyethylene, higher friction 0.079 ± 0.0070 was measured likely due to that ceramic surface being rougher than usual. Metal-on-metal hips were compared without and with a TiN coating, resulting in 0.049 ± 0.014 and 0.097 ± 0.020 friction factors, respectively (statistically significant, p < 0.001), and the coating wore away on all coated hips eventually. Higher friction mostly correlated with higher wear or damage to femoral heads or implant coatings, except for the highly cross-linked wear resistant ultrahigh-molecular-weight polyethylene which had slightly higher friction, confirming the same finding in other independent studies. This type of friction measurements can help screen for clamping and elevated wear of metal-on-metal and resurfacing total hip replacements, surgical malpositioning, and abraded and otherwise damaged surfaces.
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Affiliation(s)
- Hani Haider
- Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA
| | - Joel N Weisenburger
- Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA
| | - Kevin L Garvin
- Department of Orthopaedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA
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Galandáková A, Ulrichová J, Langová K, Hanáková A, Vrbka M, Hartl M, Gallo J. Characteristics of synovial fluid required for optimization of lubrication fluid for biotribological experiments. J Biomed Mater Res B Appl Biomater 2016; 105:1422-1431. [DOI: 10.1002/jbm.b.33663] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 02/18/2016] [Accepted: 03/10/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Adéla Galandáková
- Department of Medical Chemistry and Biochemistry; Faculty of Medicine and Dentistry, Palacký University Olomouc; Czech Republic
| | - Jitka Ulrichová
- Department of Medical Chemistry and Biochemistry; Faculty of Medicine and Dentistry, Palacký University Olomouc; Czech Republic
| | - Kateřina Langová
- Department of Medical Biophysics; Faculty of Medicine and Dentistry, Palacký University Olomouc; Czech Republic
| | - Adéla Hanáková
- Department of Medical Biophysics; Faculty of Medicine and Dentistry, Palacký University Olomouc; Czech Republic
| | - Martin Vrbka
- Institute of Machine and Industrial Design, Faculty of Mechanical Engineering, Brno University of Technology; Czech Republic
| | - Martin Hartl
- Institute of Machine and Industrial Design, Faculty of Mechanical Engineering, Brno University of Technology; Czech Republic
| | - Jiri Gallo
- Department of Orthopaedics; Faculty of Medicine and Dentistry, Palacký University Olomouc, University Hospital Olomouc; Olomouc Czech Republic
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Nečas D, Vrbka M, Urban F, Křupka I, Hartl M. The effect of lubricant constituents on lubrication mechanisms in hip joint replacements. J Mech Behav Biomed Mater 2016; 55:295-307. [DOI: 10.1016/j.jmbbm.2015.11.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 11/02/2015] [Accepted: 11/09/2015] [Indexed: 01/15/2023]
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Dong Y, Svoboda P, Vrbka M, Kostal D, Urban F, Cizek J, Roupcova P, Dong H, Krupka I, Hartl M. Towards near-permanent CoCrMo prosthesis surface by combining micro-texturing and low temperature plasma carburising. J Mech Behav Biomed Mater 2015; 55:215-227. [PMID: 26594781 DOI: 10.1016/j.jmbbm.2015.10.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/28/2015] [Accepted: 10/23/2015] [Indexed: 11/15/2022]
Abstract
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. In-situ colorimetric interferometry confirmed that the maximum film thickness around texture area was 530nm, indicating that the additional lubricant during sliding motion might provide exceptional bearing life.
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Affiliation(s)
- Yangchun Dong
- Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic; Central European Institute of Technology (CEITEC), Brno 602 00, Czech Republic.
| | - Petr Svoboda
- Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic
| | - Martin Vrbka
- Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic
| | - David Kostal
- Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic
| | - Filip Urban
- Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic
| | - Jan Cizek
- NETME Centre, Institute of Materials Science and Engineering, Brno University of Technology, 616 69, Czech Republic
| | - Pavla Roupcova
- Central European Institute of Technology (CEITEC), Brno 602 00, Czech Republic
| | - Hanshan Dong
- School of Metallurgy and Materials, Birmingham University, B15 2TT UK
| | - Ivan Krupka
- Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic
| | - Martin Hartl
- Faculty of Mechanical Engineering, Brno University of Technology, Brno 616 69, Czech Republic
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Schröder C, Steinbrück A, Müller T, Woiczinski M, Chevalier Y, Weber P, Müller PE, Jansson V. Rapid prototyping for in vitro knee rig investigations of prosthetized knee biomechanics: comparison with cobalt-chromium alloy implant material. Biomed Res Int 2015; 2015:185142. [PMID: 25879019 DOI: 10.1155/2015/185142] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 09/27/2014] [Indexed: 12/24/2022]
Abstract
Retropatellar complications after total knee arthroplasty (TKA) such as anterior knee pain and subluxations might be related to altered patellofemoral biomechanics, in particular to trochlear design and femorotibial joint positioning. A method was developed to test femorotibial and patellofemoral joint modifications separately with 3D-rapid prototyped components for in vitro tests, but material differences may further influence results. This pilot study aims at validating the use of prostheses made of photopolymerized rapid prototype material (RPM) by measuring the sliding friction with a ring-on-disc setup as well as knee kinematics and retropatellar pressure on a knee rig. Cobalt-chromium alloy (standard prosthesis material, SPM) prostheses served as validation standard. Friction coefficients between these materials and polytetrafluoroethylene (PTFE) were additionally tested as this latter material is commonly used to protect pressure sensors in experiments. No statistical differences were found between friction coefficients of both materials to PTFE. UHMWPE shows higher friction coefficient at low axial loads for RPM, a difference that disappears at higher load. No measurable statistical differences were found in knee kinematics and retropatellar pressure distribution. This suggests that using polymer prototypes may be a valid alternative to original components for in vitro TKA studies and future investigations on knee biomechanics.
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Damm P, Bender A, Bergmann G. Postoperative changes in in vivo measured friction in total hip joint prosthesis during walking. PLoS One 2015; 10:e0120438. [PMID: 25806805 PMCID: PMC4373913 DOI: 10.1371/journal.pone.0120438] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 01/22/2015] [Indexed: 12/02/2022] Open
Abstract
Loosening of the artificial cup and inlay is the most common reasons for total hip replacement failures. Polyethylene wear and aseptic loosening are frequent reasons. Furthermore, over the past few decades, the population of patients receiving total hip replacements has become younger and more active. Hence, a higher level of activity may include an increased risk of implant loosening as a result of friction-induced wear. In this study, an instrumented hip implant was used to measure the contact forces and friction moments in vivo during walking. Subsequently, the three-dimensional coefficient of friction in vivo was calculated over the whole gait cycle. Measurements were collected from ten subjects at several time points between three and twelve months postoperative. No significant change in the average resultant contact force was observed between three and twelve months postoperative. In contrast, a significant decrease of up to 47% was observed in the friction moment. The coefficient of friction also decreased over postoperative time on average. These changes may be caused by ‘running-in’ effects of the gliding components or by the improved lubricating properties of the synovia. Because the walking velocity and contact forces were found to be nearly constant during the observed period, the decrease in friction moment suggests an increase in fluid viscosity. The peak values of the contact force individually varied by 32%-44%. The friction moment individually differed much more, by 110%-129% at three and up to 451% at twelve months postoperative. The maximum coefficient of friction showed the highest individual variability, about 100% at three and up to 914% at twelve months after surgery. These individual variations in the friction parameters were most likely due to different ‘running-in’ effects that were influenced by the individual activity levels and synovia properties.
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Affiliation(s)
- Philipp Damm
- Julius Wolff Institute, Charité—Universitaetsmedizin Berlin, Berlin, Germany
- * E-mail:
| | - Alwina Bender
- Julius Wolff Institute, Charité—Universitaetsmedizin Berlin, Berlin, Germany
| | - Georg Bergmann
- Julius Wolff Institute, Charité—Universitaetsmedizin Berlin, Berlin, Germany
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Vrbka M, Nečas D, Hartl M, Křupka I, Urban F, Gallo J. Visualization of lubricating films between artificial head and cup with respect to real geometry. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.biotri.2015.05.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Huang J, Wang L, Liu B, Wan S, Xue Q. In vitro evaluation of the tribological response of Mo-doped graphite-like carbon film in different biological media. ACS Appl Mater Interfaces 2015; 7:2772-2783. [PMID: 25580834 DOI: 10.1021/am507850r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Complicated tribochemical reactions with the surrounding media often occur at the prosthesis material, which is a dominant factor causing the premature failure in revision surgery. Graphite-like carbon (GLC) film has been proven to be an excellent tribological adaption to water-based media, and this work focused on the friction and wear behavior of Mo-doped GLC (Mo-GLC)-coated poly(aryl ether ether ketone) sliding against Al2O3 counterpart in physiological saline, simulated body fluid, and fetal bovine serum (FBS), which mainly emphasized the interface interactions of the prosthetic materials/lubricant. Results showed different tribological responses of Mo-GLC/Al2O3 pairs strongly correlated with the interfacial reactions of the contacting area. Particularly, a transfer layer was believed to be responsible for the excellent wear reduction of Mo-GLC/Al2O3 pair in FBS medium, in which graphitic carbon and protein species were contained. The wear mechanisms are tentatively discussed according to the morphologies and chemical compositions of the worn surfaces examined by scanning electron microscope as well as X-ray photoelectron spectroscopy.
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Affiliation(s)
- Jinxia Huang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou, 730000, P. R. China
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Reinders J, Sonntag R, Kretzer JP. How do gait frequency and serum-replacement interval affect polyethylene wear in knee-wear simulator tests? J Mater Sci Mater Med 2014; 25:2463-2469. [PMID: 25015325 DOI: 10.1007/s10856-014-5271-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 07/01/2014] [Indexed: 06/03/2023]
Abstract
Polyethylene wear (PE) is known to be a limiting factor in total joint replacements. However, a standardized wear test (e.g. ISO standard) can only replicate the complex in vivo loading condition in a simplified form. In this study, two different parameters were analyzed: (a) Bovine serum, as a substitute for synovial fluid, is typically replaced every 500,000 cycles. However, a continuous regeneration takes place in vivo. How does serum-replacement interval affect the wear rate of total knee replacements? (b) Patients with an artificial joint show reduced gait frequencies compared to standardized testing. What is the influence of a reduced frequency? Three knee wear tests were run: (a) reference test (ISO), (b) testing with a shortened lubricant replacement interval, (c) testing with reduced frequency. The wear behavior was determined based on gravimetric measurements and wear particle analysis. The results showed that the reduced test frequency only had a small effect on wear behavior. Testing with 1 Hz frequency is therefore a valid method for wear testing. However, testing with a shortened replacement interval nearly doubled the wear rate. Wear particle analysis revealed only small differences in wear particle size between the different tests. Wear particles were not linearly released within one replacement interval. The ISO standard should be revised to address the marked effects of lubricant replacement interval on wear rate.
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Affiliation(s)
- Jörn Reinders
- Laboratory of Biomechanics and Implant Research, Department of Orthopedics and Traumatology, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118, Heidelberg, Germany,
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Abstract
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. The 3D surface roughness profiles of the femoral heads and acetabular cups (Srms, Sa, and Ssk) were measured to determine the microscopic wear. The bearings were imaged using an atomic-force microscope in contact mode, to produce a topographical map of the surfaces of the femoral heads. Friction tests were performed on the bearing couples to determine the lubrication regime under which they were operating during the walking cycle. The diametral clearances were also measured. RESULTS 3 femoral heads showed stripe wear and the remaining 6 bearings showed minimal wear. The femoral heads with stripe wear had significantly higher surface roughness than the minimally worn bearings (0.645 vs. 0.289, p = 0.04). High diametral clearances, higher than expected friction, and mixed/boundary lubrication regimes prevailed in these retrieved bearings. INTERPRETATION Despite the less than ideal tribological factors, these first-generation CoC bearings still showed minimal wear in the long term compared to previous retrieval analyses.
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Affiliation(s)
- Muhammad Korim
- University Hospitals of Leicester, Leicester General Hospital, Leicester
| | - Susan Scholes
- School of Mechanical and Systems Engineering, Newcastle University, Newcastle
| | - Anthony Unsworth
- School of Engineering and Computing Sciences, Durham University, Durham, UK.
| | - Richard Power
- University Hospitals of Leicester, Leicester General Hospital, Leicester
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Vrbka M, Křupka I, Hartl M, Návrat T, Gallo J, Galandáková A. In situ measurements of thin films in bovine serum lubricated contacts using optical interferometry. Proc Inst Mech Eng H 2014; 228:149-58. [DOI: 10.1177/0954411913517498] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The aim of this study is to consider the relevance of in situ measurements of bovine serum film thickness in the optical test device that could be related to the function of the artificial hip joint. It is mainly focussed on the effect of the hydrophobicity or hydrophilicity of the transparent surface and the effect of its geometry. Film thickness measurements were performed using ball-on-disc and lens-on-disc configurations of optical test device as a function of time. Chromatic interferograms were recorded with a high-speed complementary metal-oxide semiconductor digital camera and evaluated with thin film colorimetric interferometry. It was clarified that a chromium layer covering the glass disc has a hydrophobic behaviour which supports the adsorption of proteins contained in the bovine serum solution, thereby a thicker lubricating film is formed. On the contrary, the protein film formation was not observed when the disc was covered with a silica layer having a hydrophilic behaviour. In this case, a very thin lubricating film was formed only due to the hydrodynamic effect. Metal and ceramic balls have no substantial effect on lubricant film formation although their contact surfaces have relatively different wettability. It was confirmed that conformity of contacting surfaces and kinematic conditions has fundamental effect on bovine serum film formation. In the ball-on-disc configuration, the lubricant film is formed predominantly due to protein aggregations, which pass through the contact zone and increase the film thickness. In the more conformal ball-on-lens configuration, the lubricant film is formed predominantly due to hydrodynamic effect, thereby the film thickness is kept constant during measurement.
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Affiliation(s)
- Martin Vrbka
- Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic
| | - Ivan Křupka
- Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic
| | - Martin Hartl
- Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic
| | - Tomáš Návrat
- Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic
| | - Jiří Gallo
- Orthopaedic Clinic, University Hospital Olomouc, Olomouc, Czech Republic
| | - Adéla Galandáková
- Orthopaedic Clinic, University Hospital Olomouc, Olomouc, Czech Republic
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32
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Kretzer JP, Reinders J, Sonntag R, Hagmann S, Streit M, Jeager S, Moradi B. Wear in total knee arthroplasty--just a question of polyethylene?: Metal ion release in total knee arthroplasty. Int Orthop 2013; 38:335-40. [PMID: 24218115 DOI: 10.1007/s00264-013-2162-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 10/20/2013] [Indexed: 11/25/2022]
Abstract
PURPOSE Biological reactions against wear particles are a common cause for revision in total knee arthroplasty. To date, wear has mainly been attributed to polyethylene. However, the implants have large metallic surfaces that also could potentially lead to metal wear products (metal ions and debris). The aim of this study was to determine the local release of cobalt, chromium, molybdenum and titanium in total knee arthroplasty during a standard knee wear test. METHODS Four moderately conforming fixed-bearing implants were subjected to physiological loadings and motions for 5×10(6) walking cycles in a knee wear simulator. Polyethylene wear was determined gravimetrically and the release of metallic wear products was measured using high resolution-inductively coupled plasma-mass spectrometry. RESULTS A polyethylene wear rate of 7.28 ± 0.27 mg/10(6) cycles was determined and the cumulative mass of released metals measured 1.63 ± 0.28 mg for cobalt, 0.47 ± 0.06 mg for chromium, 0.42 ± 0.06 mg for molybdenum and 1.28 ± 0.14 mg for titanium. CONCLUSION For other metallic implants such as metal-on-metal total hip arthroplasty, the metal wear products can interact with the immune system, potentially leading to immunotoxic effects. In this study about 12 % by weight of the wear products were metallic, and these particles and ions may become clinically relevant for patients sensitive to these materials in particular. Non-metallic materials (e.g. ceramics or suitable coatings) may be considered for an alternative treatment for those patients.
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Affiliation(s)
- Jan Philippe Kretzer
- Laboratory of Biomechanics and Implant Research, Department of Orthopaedics & Trauma Surgery, Heidelberg University Hospital, Heidelberg, Germany,
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Meyer JN, Mathew MT, Wimmer MA, LeSuer RJ. Effect of tribolayer formation on corrosion of CoCrMo alloys investigated using scanning electrochemical microscopy. Anal Chem 2013; 85:7159-66. [PMID: 23848566 DOI: 10.1021/ac400823q] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Scanning electrochemical microscopy was used to probe the topography and electrochemical activity of CoCrMo alloys mechanically polished in the presence of bovine calf serum (BCS) in a hip simulator. These substrates are made of the same alloy used in metal-on-metal bearings for artificial hip joints. The BCS serves as an in vitro substitute for the synovial fluid which forms a lubricant in the actual orthopedic device. Chemical and mechanical processes result in the formation of a tribolayer which passivates the alloy surface. Our studies of the heterogeneous electron transfer between ferrocenemethanol and the alloy indicate that the tribolayer formed on both high- and low-carbon substrates is highly heterogeneous with regions of high electrochemical activity. Whereas pits in the samples polished in the absence of BCS show the regions of highest electrochemical activity, the tribolayer-coated samples have electrochemical hot spots in topographically smooth regions of the surface. The tribolayer provides some attenuation of the electrochemical activity of the alloy but does not prevent the possibility of corrosion from occurring.
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Affiliation(s)
- Joshua N Meyer
- Department of Chemistry and Physics, Chicago State University, Chicago, Illinois 60628, United States
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34
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Moghadas P, Mahomed A, Hukins DWL, Shepherd DET. Effect of lubricants on friction in laboratory tests of a total disc replacement device. Proc Inst Mech Eng H 2013; 227:988-93. [PMID: 23804950 DOI: 10.1177/0954411913485059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Some designs of total disc replacement devices have articulating bearing surfaces, and these devices are tested in vitro with a lubricant of diluted calf serum. It is believed that the lubricant found in total disc replacement devices in vivo is interstitial fluid that may have properties between that in Ringer's solution and diluted calf serum. To investigate the effect of lubricants, a set of friction tests were performed on a generic model of a metal against metal ball-and-socket total disc replacement device. Two devices were tested: one with a ball radius of 10 mm and other with a ball radius of 16 mm; each device had a radial clearance of 0.015 mm. A spine simulator was used to measure frictional torque for each device in axial rotation, flexion-extension and lateral bending at frequencies of 0.25-2 Hz, under 1200 N axial load. Each device was tested with two different lubricants: a solution of new born calf serum diluted with deionised water and Ringer's solution. The results showed that the frictional torque generated between the bearing surfaces was significantly higher in Ringer's solution than in diluted calf serum. The use of Ringer's solution as a lubricant provides a stringent test condition to detect possible problems. Diluted calf serum is more likely to provide an environment closer to that in vivo. However, the precise properties of the fluid lubricating a total disc replacement device are not known; hence, tests using diluted calf serum may not necessarily give the same results as those obtained in vivo.
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Affiliation(s)
- Parshia Moghadas
- School of Mechanical Engineering, University of Birmingham, Birmingham, UK
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35
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Kretzer JP, Zietz C, Schröder C, Reinders J, Middelborg L, Paulus A, Sonntag R, Bader R, Utzschneider S. [Principles of tribological analysis of endoprostheses]. Orthopade 2013; 41:844-52. [PMID: 23052851 DOI: 10.1007/s00132-012-1948-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
For the tribological characterization of artificial joints, various experimental methods are currently available. However, the in vitro test conditions applied are only comparable in a limited way and transferability to the in vivo situation is also restricted. This is due to the different wear simulation concepts used and partly insufficient simulation of clinical worst case situations. In the present paper current scientific methods and procedures for tribological testing of artificial joints are presented. In addition, the biological effects of wear products are described enabling clinicians to challenge tribological studies and to facilitate specific interpretation of scientific results taking the clinical situation into account.
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Affiliation(s)
- J P Kretzer
- Labor für Biomechanik und Implantatforschung, Klinik für Orthopädie und Unfallchirurgie, Universitätsklinikum Heidelberg, 69120, Heidelberg, Deutschland.
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36
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Abstract
The wear of a model metal-on-metal ball-and-socket total disc arthroplasty was measured in a simulator. The ball had a radius of 10 mm, and there was a radial clearance between ball and socket of 0.015 mm. The model was subjected to simultaneous flexion–extension, lateral bending, axial rotation (frequency: 1 Hz) and compression (frequency: 2 Hz, maximum load: 2 kN). Throughout the tests, the models were immersed in calf serum diluted to a concentration of 15 g protein per litre, at a controlled temperature of 37 °C. Tests were performed on three models. At regular intervals (0, 0.5, 1, 2, 3, 4 and 5 million cycles), mass and surface roughness were determined; mass measurements were converted into the volume lost as a result of wear. All measurements were repeated six times. Wear occurred in two stages. In the first stage (duration about 1 million cycles), there was a linear wear rate of 2.01 ± 0.04 mm3 per million cycles; in the second stage, there was a linear wear rate of 0.76 ± 0.02 mm3 per million cycles. Surface roughness increased linearly in the first million cycles and then continued to increase linearly but more slowly.
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Affiliation(s)
- Parshia Moghadas
- School of Mechanical Engineering, University of Birmingham, Birmingham, UK
| | - Aziza Mahomed
- School of Mechanical Engineering, University of Birmingham, Birmingham, UK
| | - David WL Hukins
- School of Mechanical Engineering, University of Birmingham, Birmingham, UK
| | - Duncan ET Shepherd
- School of Mechanical Engineering, University of Birmingham, Birmingham, UK
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37
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Abstract
After the rapid growth in the use of CoCrMo metal-on-metal hip replacements since the second generation was introduced circa 1990, metal-on-metal hip replacements have experienced a sharp decline in the last two years due to biocompatibility issues related to wear and corrosion products. Despite some excellent clinical results, the release of wear and corrosion debris and the adverse response of local tissues have been of great concern. There are many unknowns regarding how CoCrMo metal bearings interact with the human body. This perspective article is intended to outline some recent progresses in understanding wear and corrosion of metal-on-metal hip replacement both in vivo and in vitro. The materials, mechanical deformation, corrosion, wear-assisted corrosion, and wear products will be discussed. Possible adverse health effects caused by wear products will be briefly addressed, as well as some of the many open questions such as the detailed chemistry of corrosion, tribochemical reactions and the formation of graphitic layers. Nowadays we design almost routinely for high performance materials and lubricants for automobiles; humans are at least as important. It is worth remembering that a hip implant is often the difference between walking and leading a relatively normal life, and a wheelchair.
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Affiliation(s)
- Yifeng Liao
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, USA
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38
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Zhang HY, Luo JB, Zhou M, Zhang Y, Huang YL. Biotribological properties at the stem-cement interface lubricated with different media. J Mech Behav Biomed Mater 2013; 20:209-16. [PMID: 23518686 DOI: 10.1016/j.jmbbm.2013.01.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Revised: 01/04/2013] [Accepted: 01/06/2013] [Indexed: 11/16/2022]
Abstract
BACKGROUND Debonding of the stem-cement interface occurs inevitably in-vivo under physiological loading, and pseudo-synovial fluid is subsequently pumped into this interface, serving as the lubricant. However, the influence of protein adsorption onto the femoral stem surface has not been well taken into consideration in previous in vitro studies. MATERIALS AND METHODS The biotribological properties at the stem-cement interface were investigated through a series of fretting frictional tests using polished stainless steel 316L stem and smooth bone cement, lubricated by three different media at body temperature, i.e. 100% calf serum, 25% calf serum, and 0.9% saline solution. The surface characterization of the femoral stem was evaluated sequentially using optical microscope, optical interferometer, scanning electron microscope, and Raman spectroscopy. RESULTS The friction coefficient generally kept stable during the test, and the minimum value (0.254) was obtained when 100% calf serum was used as the lubricant. Slight scratches were detected within the contact area for the stainless steel 316L stems lubricated by 100% calf serum and 25% calf serum, which was further surrounded by the adsorbed protein film with alveolate feature. Additionally, a wear scar was present within the contact area when 0.9% saline solution was used as the lubricant. CONCLUSIONS Protein adsorption onto the stainless steel 316L stem surface affected the biotribological properties at the stem-cement interface under oscillatory fretting mechanism. Generation of wear debris at the stem-cement interface may be postponed by modification of physicochemical properties of the femoral stem to promote protein adsorption.
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Affiliation(s)
- H Y Zhang
- State Key Laboratory of Tribology, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing 100084, China.
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39
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Abstract
BACKGROUND Although numerous in vitro studies report on the tribological performance of and, separately, on the corrosion properties of cobalt-based alloys in metal-on-metal (MoM) bearings, the few studies that take into account the synergistic interaction of wear and corrosion (tribocorrosion) have used canonical tribo-test methods. We therefore developed synergistic study using a test method that more closely simulates hip bearing conditions. QUESTIONS/PURPOSES (1) Is the total material loss during tribocorrosion larger than the sum of its components generated during isolated mechanical wear and isolated corrosion? (2) How is the tribocorrosive process affected by the presence of protein? METHODS High carbon CoCrMo alloy discs (18) were subjected to corrosion and tribocorrosion tests under potentiostatic conditions in an apparatus simulating hip contact conditions. The input variables were the applied potential and the protein content of the electrolyte (NaCl solution versus bovine serum, 30 g/L protein). The output variables were mass loss resulting from wear in the absence of corrosion, mass loss resulting from corrosion in the absence of wear, and the total mass loss under tribocorrosion, from which the additional mass loss resulting from the combined action of wear and corrosion, or synergism, was determined in the presence and absence of protein. RESULTS The degradation mechanisms were sensitive to the interaction of wear and corrosion. The synergistic component (64 μg) in the presence of protein amounted to 34% of total material loss (187 μg). The presence of protein led to a 23% decrease in the total mass loss and to a considerable reduction in the mean current (4 μA to 0.05 μA) under tribocorrosion. CONCLUSIONS Synergistic effects during tribocorrosion may account for a considerable portion of MoM degradation and are affected by proteins. CLINICAL RELEVANCE The in vivo performance of some large-diameter MoM joints is unsatisfactory. The synergistic component resulting from tribocorrosion may have been missed in conventional preclinical wear tests.
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Affiliation(s)
- Mathew T. Mathew
- Section of Tribology, Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612 USA
| | - Joshua J. Jacobs
- Section of Tribology, Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612 USA
| | - Markus A. Wimmer
- Section of Tribology, Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612 USA
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40
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Ma L, Rainforth W. The effect of lubrication on the friction and wear of Biolox®delta. Acta Biomater 2012; 8:2348-59. [PMID: 22342830 DOI: 10.1016/j.actbio.2011.12.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Revised: 12/12/2011] [Accepted: 12/16/2011] [Indexed: 10/28/2022]
Abstract
The performance of total hip-joint replacements depends strongly on the state of lubrication in vivo. In order to test candidate prosthetic materials, in vitro wear testing requires a lubricant that behaves in the same manner as synovial fluid. The current study investigated three lubricants and looked in detail at the lubrication conditions and the consequent effect on ball-on-flat reciprocating wear mechanisms of Biolox®delta against alumina. Biolox®delta, the latest commercial material for artificial hip-joint replacements, is an alumina-matrix composite with improved mechanical properties through the addition of zirconia and other mixed oxides. Three commonly used laboratory lubricants, ultra pure water, 25 vol.% new-born calf serum solution and 1 wt.% carboxymethyl cellulose sodium salt (CMC-Na) solution, were used for the investigation. The lubrication regimes were defined by constructing Stribeck curves. Full fluid-film lubrication was observed for the serum solution whereas full fluid-film and mixed lubrications were observed in both water and the CMC-Na solution. The wear rates in the CMC-Na and new-born calf serum were similar, but were an order of magnitude higher in water. The worn surfaces all exhibited pitting, which is consistent with the transition from mild wear to severe or "stripe" wear. The extent of pitting was greatest in the serum solution, but least in the water. On all worn surfaces, the zirconia appeared to have fully transformed from tetragonal to monoclinic symmetry. However, there was no evidence of microcracking associated with the transformed zirconia. Nevertheless, AFM indicated that zirconia was lost preferentially to the alumina grains during sliding. Thus, the current study has shown conclusively that the wear mechanisms for Biolox®delta clearly depend on the lubricant used, even where wear rates were similar.
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Brockett CL, John G, Williams S, Jin Z, Isaac GH, Fisher J. Wear of ceramic-on-carbon fiber-reinforced poly-ether ether ketone hip replacements. J Biomed Mater Res B Appl Biomater 2012; 100:1459-65. [DOI: 10.1002/jbm.b.32664] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 09/29/2011] [Accepted: 10/20/2011] [Indexed: 12/13/2022]
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Moghadas P, Mahomed A, Hukins DW, Shepherd DE. Friction in metal-on-metal total disc arthroplasty: Effect of ball radius. J Biomech 2012; 45:504-9. [DOI: 10.1016/j.jbiomech.2011.11.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Revised: 11/21/2011] [Accepted: 11/22/2011] [Indexed: 11/26/2022]
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Abstract
Arthritis is a leading cause of disability, and when nonoperative methods have failed, a prosthetic implant is a cost-effective and clinically successful treatment. Metal-on-metal replacements are an attractive implant technology, a lower-wear alternative to metal-on-polyethylene devices. Relatively little is known about how sliding occurs in these implants, except that proteins play a critical role and that there is a tribological layer on the metal surface. We report evidence for graphitic material in the tribological layer in metal-on-metal hip replacements retrieved from patients. As graphite is a solid lubricant, its presence helps to explain why these components exhibit low wear and suggests methods of improving their performance; simultaneously, this raises the issue of the physiological effects of graphitic wear debris.
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Affiliation(s)
- Y Liao
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60201, USA
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44
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Williams SR, Wu JJ, Unsworth A, Khan I. Wear and surface analysis of 38 mm ceramic-on-metal total hip replacements under standard and severe wear testing conditions. Proc Inst Mech Eng H 2011; 225:783-96. [DOI: 10.1177/0954411911404773] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The purpose of this study was to compare the wear of zirconia-toughened alumina (ZTA) and alumina femoral heads tested against as-cast CoCrMo alloy acetabular cups under both standard and severe wear conditions. A new severe test, which included medio-lateral displacement of the head and rim impact upon relocation, was developed. This resulted in an area of metal transfer and an area of increased wear on the superior-anterior segment of the head that were thought to be due to dislocation and rim impact respectively. While the wear of all ceramic heads was immeasurable using the gravimetric method, the wear rates for the metallic cups from each test were readily calculated. An average steady state wear rate of 0.023 ± 0.005 mm3/106 cycles was found for the cups articulating against ZTA under standard wear conditions. A similar result had previously been obtained for the wear of cups articulated against alumina heads of the same size (within the same laboratory). Under severe wear conditions an increase in the metallic cup steady state wear rate was found with the ZTA and alumina tests giving 0.623 ± 0.252 and 1.35 ± 0.154 mm3/106 cycles respectively. Wear of the ceramic heads was detected using atomic force microscopy which showed, under severe wear conditions, a decrease in polishing marks and occasional grain removal. The surfaces of the ZTA heads tested under standard conditions were virtually unchanged from the unworn samples. Friction tests showed low friction factors for all components, pre and post wear.
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Affiliation(s)
- S R Williams
- School of Engineering and Computing Sciences, Durham University, South Road, Durham, UK
| | - J J Wu
- School of Engineering and Computing Sciences, Durham University, South Road, Durham, UK
| | - A Unsworth
- School of Engineering and Computing Sciences, Durham University, South Road, Durham, UK
| | - I Khan
- Biomet UK Ltd, Dorcan Industrial Estate, Swindon, UK
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45
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Maskiewicz VK, Williams PA, Prates SJ, Bowsher JG, Clarke IC. Characterization of protein degradation in serum-based lubricants during simulation wear testing of metal-on-metal hip prostheses. J Biomed Mater Res B Appl Biomater 2010; 94:429-440. [PMID: 20583304 DOI: 10.1002/jbm.b.31671] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A size exclusion high performance liquid chromatography (SEC-HPLC) method has been developed which is capable of separation and quantitation of bovine serum albumin (BSA) and bovine serum globulin (BSG) components of serum-based lubricant (SBL) solutions. This allowed characterization of the stability profiles of these proteins when acting as lubricants during hip wear simulation, and identification of wear-specific mechanisms of degradation. Using cobalt-chromium metal-on-metal (MOM) hip joints, it was observed that BSA remained stable for up to 3 days (215K cycles) of wear testing after which the protein degraded in a fairly linear fashion. BSG on the other hand, began to degrade immediately and in a linear fashion with a rate constant of 5% per day. Loss of both proteins occurred via the formation of high molecular weight aggregates which precipitated out of solution. No fragmentation of the polypeptide backbone of either protein was observed. Data obtained suggest that protein degradation was not due to microbial contamination, denaturation at the air-water interface, or frictional heating of articulating joint surfaces in these studies. We conclude that the primary source of protein degradation during MOM simulation testing occurs via high shear rates experienced by SBL solutions at articulating surfaces, possibly coupled with metal-protein interactions occurring as new and reactive metal surfaces are generated during wear testing. The development of this analytical methodology will allow new studies to clarify the role of SBL solutions in wear simulation studies and the interactions and lubricating properties of serum proteins with prosthetic surfaces other than MOM.
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Affiliation(s)
- Victoria K Maskiewicz
- Department of Pharmaceutical Sciences, Loma Linda University School of Pharmacy, Loma Linda, California 92354, USA.
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46
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Williams SR, Wu JJ, Unsworth A, Khan I. Tribological and surface analysis of 38mm alumina–as-cast Co–Cr–Mo total hip arthroplasties. Proc Inst Mech Eng H 2009; 223:941-54. [DOI: 10.1243/09544119jeim590] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
There is currently much discussion over the use of ceramic femoral components against metal acetabular cups, for use in total hip arthroplasty. The current study investigates six hot isostatically pressed alumina femoral heads of 38 mm diameter articulating against six as-cast Co—Cr—Mo metallic acetabular cups. Standard walking-cycle simulator wear testing was carried out to 5×106 cycles using the Durham Mark II hip wear simulator, and wear was determined gravimetrically. In addition, surface topography, using a non-contacting profilometer, an atomic force microscope, and an optical microscope, was monitored throughout the wear test. The wear of the ceramic heads was found to be undetectable using the current gravimetric method; however, a change in the surface topography was seen, as grain removal on the pole was observed through atomic force microscopy analysis. A biphasic wear pattern was found for the metallic cups, with low wear rates of 1.04 ± 0.293 mm3/106 cycles (mean, ±95 per cent confidence interval) and 0.0209 ± 0.004 mm3/106 cycles (mean, ±95 per cent confidence interval) for running-in and steady state wear phases respectively. Frictional measurement revealed that the joints were tending towards full fluid-film lubrication in parts of the walking cycle. The results show that the combination of hot isostatically pressed alumina and as-cast Co—Cr—Mo is a promising alternative for total hip arthroplasties.
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Affiliation(s)
- S R Williams
- Centre for Biomedical Engineering, School of Engineering, Durham University, Durham, UK
| | - J J Wu
- Centre for Biomedical Engineering, School of Engineering, Durham University, Durham, UK
| | - A Unsworth
- Centre for Biomedical Engineering, School of Engineering, Durham University, Durham, UK
| | - I Khan
- Biomet UK Ltd, Swindon, UK
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Roba M, Naka M, Gautier E, Spencer ND, Crockett R. The adsorption and lubrication behavior of synovial fluid proteins and glycoproteins on the bearing-surface materials of hip replacements. Biomaterials 2009; 30:2072-8. [DOI: 10.1016/j.biomaterials.2008.12.062] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2008] [Accepted: 12/25/2008] [Indexed: 10/21/2022]
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Scholes SC, Unsworth A. Pitch-based carbon-fibre-reinforced poly (ether—ether—ketone) OPTIMA® assessed as a bearing material in a mobile bearing unicondylar knee joint. Proc Inst Mech Eng H 2008; 223:13-25. [DOI: 10.1243/09544119jeim471] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The introduction of unicondylar knee prostheses has allowed the preservation of the non-diseased compartment of the knee while replacing the diseased or damaged compartment. In an attempt to reduce the likelihood of aseptic loosening, new material combinations have been investigated within the laboratory. Tribological tests (friction, lubrication, and wear) were performed on metal-on-carbon-fibre-reinforced (CFR) poly (ether—ether—ketone) (PEEK) (pitch-based) mobile unicondylar knee prostheses up to 5×106 cycles. Both a loaded soak control and an unloaded soak control (both medial and lateral components) were used to compensate for weight change due to lubricant absorption. For this material combination the loaded soak control gave slightly lower wear for both the medial and the lateral components than did the unloaded soak control. The medial components gave higher steady state wear than the lateral components (1.70 mm3 per 106 cycles compared with 1.02 mm3 per 106 cycles with the loaded soak control). The results show that the CFR PEEK unicondylar knee joints performed well in these wear tests. They gave lower volumetric wear rates than conventional metal-on-ultra-high-molecular-weight polyethylene prostheses have given in the past when tested under similar conditions. The friction tests showed that, at physiological viscosities, these joints operated in the boundary—mixed-lubrication regime. The low wear produced by these joints seems to be a function of the material combination and not of the lubrication regime.
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Affiliation(s)
- S C Scholes
- School of Engineering, Durham University, Durham, UK
| | - A Unsworth
- School of Engineering, Durham University, Durham, UK
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Fang HW, Hsieh MC, Huang HT, Tsai CY, Chang MH. Conformational and adsorptive characteristics of albumin affect interfacial protein boundary lubrication: from experimental to molecular dynamics simulation approaches. Colloids Surf B Biointerfaces 2009; 68:171-7. [PMID: 19026525 DOI: 10.1016/j.colsurfb.2008.09.029] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2008] [Revised: 08/26/2008] [Accepted: 09/30/2008] [Indexed: 11/21/2022]
Abstract
The lifetime of artificial joints is mainly determined by their biotribological properties. Synovial fluid which consists of various biological molecules acts as the lubricant. Among the compositions of synovial fluid, albumin is the most abundant protein. Under high load and low sliding speed articulation of artificial joint, it is believed the lubricants form protective layers on the sliding surfaces under the boundary lubrication mechanism. The protective molecular layer keeps two surfaces from direct collision and thus decreases the possibility of wear damage. However, the lubricating ability of the molecular layer may vary due to the conformational change of albumin in the process. In this study, we investigated the influence of albumin conformation on the adsorption behaviors on the articulating surfaces and discuss the relationship between adsorbed albumin and its tribological behaviors. We performed the friction tests to study the effects of albumin unfolding on the frictional behaviors. The novelty of this research is to further carry out molecular dynamics simulation, and protein adsorption experiments to investigate the mechanisms of the albumin-mediated boundary lubrication of arthroplastic materials. It was observed that the thermal processes induce the loss of secondary structure of albumin. The compactness of the unfolded structure leads to a higher adsorption rate onto the articulating material surface and results in the increase of friction coefficient.
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Wang FC, Brockett C, Williams S, Udofia I, Fisher J, Jin ZM. Lubrication and friction prediction in metal-on-metal hip implants. Phys Med Biol 2008; 53:1277-93. [DOI: 10.1088/0031-9155/53/5/008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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