1
|
Fischer A, Telouk P, Beckmann C, Heermant S, Wittrock A, Debus J, Wimmer MA. Performance of Austenitic High-Nitrogen Steels under Gross Slip Fretting Corrosion in Bovine Serum. J Funct Biomater 2024; 15:110. [PMID: 38667567 PMCID: PMC11051106 DOI: 10.3390/jfb15040110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
Modular artificial hip joints are a clinical standard today. However, the release of wear products from the head-taper interface, which includes wear particles in the nm size range, as well as metal ions, have raised concerns. Depending on the loading of such taper joints, a wide variety of different mechanisms have been found by retrieval analyses. From these, this paper concentrates on analyzing the contribution of gross slip fretting corrosion at ultra-mild wear rates using a bovine calf serum solution (BCS) as the lubricant. The parameters were chosen based on biomechanical considerations, producing wear rates of some ng/m wear path. In parallel, the evolution of tribomaterial (third bodies) was analyzed as to its constituents and generation rates. It has already been shown earlier that, by an advantageous combination of wear mechanisms and submechanisms, certain constituents of the tribomaterial remain inside the contact area and act like extreme-pressure lubricant additives. For the known wear and corrosion resistance of austenitic high-nitrogen steels (AHNSs), which outperform CoCrMo alloys even under inflammatory conditions, we hypothesized that such steels will generate ultra-mild wear rates under gross slip fretting. While testing AHNSs against commercially available biomedical-grade materials of CoCrMo and TiAlV alloys, as well as zirconia-toughened alumina (ZTA) and against itself, it was found that AHNSs in combination with a Ti6Al4V alloy generated the smallest wear rate under gross slip fretting corrosion. This paper then discusses the wear behavior on the basis of ex situ analyses of the worn surfaces as to the acting wear mechanisms and submechanisms, as well as to the tribological reaction products.
Collapse
Affiliation(s)
- Alfons Fischer
- Max Planck Institute for Sustainable Materials, Microstructure Physics and Alloy Design, 40237 Duesseldorf, Germany
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612, USA;
| | - Philipe Telouk
- Laboratoire de Géologie, Université de Lyon, 69342 Lyon, France;
| | - Christian Beckmann
- Department of Physics, TU Dortmund University, 44227 Dortmund, Germany; (C.B.); (S.H.); (A.W.); (J.D.)
| | - Saskia Heermant
- Department of Physics, TU Dortmund University, 44227 Dortmund, Germany; (C.B.); (S.H.); (A.W.); (J.D.)
| | - Adrian Wittrock
- Department of Physics, TU Dortmund University, 44227 Dortmund, Germany; (C.B.); (S.H.); (A.W.); (J.D.)
| | - Jörg Debus
- Department of Physics, TU Dortmund University, 44227 Dortmund, Germany; (C.B.); (S.H.); (A.W.); (J.D.)
| | - Markus A. Wimmer
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612, USA;
| |
Collapse
|
2
|
Mathew MT, Cheng KY, Sun Y, Barao VAR. The Progress in Tribocorrosion Research (2010-21): Focused on the Orthopedics and Dental Implants. JOURNAL OF BIO- AND TRIBO-CORROSION 2023; 9:48. [PMID: 38525435 PMCID: PMC10959289 DOI: 10.1007/s40735-023-00767-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 04/20/2023] [Accepted: 05/05/2023] [Indexed: 03/26/2024]
Abstract
Tribocorrosion is an integration of two areas-tribology and corrosion. It can be defined as the material degradation caused by the combined effect of corrosion and tribological process at the material interfaces. Significant development has occurred in the field of tribocorrosion over the past years. This development is due to its applications in various fields, such as aerospace, marine, biomedical, and space. Focusing on biomedical applications, tribocorrosion finds its applications in the implants used in cardiovascular, spine, orthopedics, trauma, and dental areas. It was reported that around 7.2 million Americans are living with joint implants. Implant surgery is a traumatic and expensive procedure. Tribocorrosion can affect the lifespan of the implants, thus leading to implant failure and a potential cause of revision surgery. Hence, it is essential to understand how tribocorrosion works, its interaction with the implants, and what procedures can be implemented to protect materials from tribocorrosion. This paper discusses how tribocorrosion research has evolved over the past 11 years (2010-2021). This is a comprehensive overview of tribocorrosion research in biomedical applications.
Collapse
Affiliation(s)
- Mathew T. Mathew
- Department of Biomedical Science, UIC College of Medicine, Rockford, IL 61107, USA
- Department of Biomedical Engineering, UIC, Chicago, IL 60612, USA
- Department of Restorative Dentistry, College of Dentistry, UIC, Chicago, IL 60612, USA
- Department of Orthopedic Surgery, Rush University Medical Center, Chicago, IL 60612, USA
| | - Kai-yuan Cheng
- Department of Biomedical Science, UIC College of Medicine, Rockford, IL 61107, USA
| | - Yani Sun
- Department of Biomedical Science, UIC College of Medicine, Rockford, IL 61107, USA
| | - Valentim A. R. Barao
- Departament of Prosthodontics and Periodontology, Piracicaba Dental School, University of Campinas (UNICAMP), Piracicaba, Sao Paulo 13414-903, Brazil
| |
Collapse
|
3
|
Pu J, Zhang Y, Zhang X, Yuan X, Yang S, Zhang G, Cui W, Tan Q, Jin Z. Fretting corrosion behavior of Ti6Al4V alloy against zirconia-toughened alumina ceramic in simulated body fluid. J Mech Behav Biomed Mater 2023; 142:105860. [PMID: 37127011 DOI: 10.1016/j.jmbbm.2023.105860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/13/2023] [Accepted: 04/16/2023] [Indexed: 05/03/2023]
Abstract
The fretting corrosion at the head-neck interface of artificial hip joints is an important reason for the failure of prostheses. The Ti6Al4V alloy-zirconia-toughened alumina (ZTA) ceramic combination has been widely used to make the head and neck of artificial hip joints. In this study, its fretting corrosion behavior in simulated body fluid was studied by electrochemical monitoring, surface morphology characterization, and chemical composition analysis. A running condition fretting map (RCFM) of load and displacement was established, including three regimes, namely partial slip regime (PSR), mixed fretting regime (MFR), and gross slip regime (GSR). The friction dissipation energy increased gradually from the PSR to MFR and GSR. In the PSR, the damage mechanisms were slight abrasive wear and tribocorrosion at the edge of contact area, as well as extremely slight adhesive wear at the center. In the MFR, the damage mechanisms were mainly adhesive wear, abrasive wear, and corrosive wear. In the GSR, the damage mechanism was serious abrasive wear, fatigue wear, and corrosive wear combined with slight adhesive wear. Finally, an ion-concentration map was created, displaying the material-loss transition of different displacements and loads. The material loss increased with the increased displacement, and increased first and then decreased with the increased load.
Collapse
Affiliation(s)
- Jian Pu
- School of Mechanical Engineering, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China
| | - Yali Zhang
- School of Mechanical Engineering, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China.
| | - Xiaogang Zhang
- School of Mechanical Engineering, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China
| | - Xinlu Yuan
- School of Mechanical Engineering, Chengdu University, Sichuan, Chengdu, 610106, China
| | - Shu Yang
- School of Mechanical Engineering, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China
| | - Guoxian Zhang
- School of Mechanical Engineering, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China
| | - Wen Cui
- Beijing AKEC Medical Co., Ltd., Beijing, 102200, China; School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Qin Tan
- School of Mechanical Engineering, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China
| | - Zhongmin Jin
- School of Mechanical Engineering, Southwest Jiaotong University, Sichuan, Chengdu, 610031, China; School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT, UK
| |
Collapse
|
4
|
A Review of Biomaterials and Associated Performance Metrics Analysis in Pre-Clinical Finite Element Model and in Implementation Stages for Total Hip Implant System. Polymers (Basel) 2022; 14:polym14204308. [PMID: 36297885 PMCID: PMC9607025 DOI: 10.3390/polym14204308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 10/01/2022] [Accepted: 10/06/2022] [Indexed: 11/30/2022] Open
Abstract
Total hip replacement (THR) is a common orthopedic surgery technique that helps thousands of individuals to live normal lives each year. A hip replacement replaces the shattered cartilage and bone with an implant. Most hip implants fail after 10–15 years. The material selection for the total hip implant systems is a major research field since it affects the mechanical and clinical performance of it. Stress shielding due to excessive contact stress, implant dislocation due to a large deformation, aseptic implant loosening due to the particle propagation of wear debris, decreased bone remodeling density due to the stress shielding, and adverse tissue responses due to material wear debris all contribute to the failure of hip implants. Recent research shows that pre-clinical computational finite element analysis (FEA) can be used to estimate four mechanical performance parameters of hip implants which are connected with distinct biomaterials: von Mises stress and deformation, micromotion, wear estimates, and implant fatigue. In vitro, in vivo, and clinical stages are utilized to determine the hip implant biocompatibility and the unfavorable local tissue reactions to different biomaterials during the implementation phase. This research summarizes and analyses the performance of the different biomaterials that are employed in total hip implant systems in the pre-clinical stage using FEA, as well as their performances in in vitro, in vivo, and in clinical studies, which will help researchers in gaining a better understanding of the prospects and challenges in this field.
Collapse
|
5
|
Wight CM, Schemitsch EH. In vitro testing for hip head-neck taper tribocorrosion: A review of experimental methods. Proc Inst Mech Eng H 2022; 236:9544119221074582. [PMID: 35139678 PMCID: PMC8915230 DOI: 10.1177/09544119221074582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In vitro test methods are challenged by the multi-factorial nature of head-neck taper connection tribocorrosion due to the consequences of simplification. Incorrect study design and misinterpretation of results has led to contradictory findings regarding important factors affecting head-neck taper tribocorrosion. This review seeks to highlight important considerations when developing in vitro test methods, to help researchers strengthen their study design and analyze the implications of others' design decisions. The advantages, disadvantages, limitations and procedural considerations for finite element analyses, electrochemical studies and in vitro simulations related to head-neck taper connection tribocorrosion are discussed. Finite element analysis offers an efficient method for studying large ranges of mechanical parameters. However, they are limited by neglecting electrochemical, biological and fluid flow factors. Electrochemical studies may be preferred if these factors are considered important. Care must be taken in interpreting data from electrochemical studies, particularly when different materials are compared. Differences in material valence and toxicity affect clinical translation of electrochemical studies' results. At their most complex, electrochemical studies attempt to simulate all aspects of headneck taper connection tribocorrosion in a bench top study. Effective execution requires in-depth knowledge of the tribocorrosion phenomenon, the involved mechanisms, and their measures such that each study design decision is fully informed.
Collapse
Affiliation(s)
- Christian M Wight
- Institute of Biomaterial and Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Emil H Schemitsch
- Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine and Dentistry, The University of Western Ontario, London, ON, Canada
| |
Collapse
|
6
|
In-vitro tribological study and submodeling finite element technique in analyzing wear of zirconia toughened alumina against alumina with bio-lubricants for hip implants. Med Eng Phys 2021; 98:83-90. [PMID: 34848043 DOI: 10.1016/j.medengphy.2021.11.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/27/2021] [Accepted: 11/01/2021] [Indexed: 11/21/2022]
Abstract
Tribological study of zirconia toughened alumina against alumina is investigated using ball-on-disk tribometer with different bio-lubricants. Friction and wear coefficients are estimated for these bio-lubricants under four different loading conditions which are equivalent to regular and risky human gait activities. Experiments are carried out for a total sliding distance of 10 km with each bio-lubricant to estimate its friction and wear coefficients. Using submodeling finite element approach, cumulative linear and volumetric wear is estimated with the help of contact pressure. The sesame oil bio-lubricant showed better wear coefficient for risky gait activities and Ringer's solution exhibited minimum wear coefficient for normal walking gait activity. Overall minimum cumulative linear and volumetric wear for 2 million cycles was obtained for Ringer's solution.
Collapse
|
7
|
Wight CM, Whyne CM, Bogoch ER, Zdero R, Chapman RM, van Citters DW, Walsh WR, Schemitsch E. Effect of head size and rotation on taper corrosion in a hip simulator. Bone Jt Open 2021; 2:1004-1016. [PMID: 34825826 PMCID: PMC8636299 DOI: 10.1302/2633-1462.211.bjo-2021-0147.r1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
AIMS This study investigates head-neck taper corrosion with varying head size in a novel hip simulator instrumented to measure corrosion related electrical activity under torsional loads. METHODS In all, six 28 mm and six 36 mm titanium stem-cobalt chrome head pairs with polyethylene sockets were tested in a novel instrumented hip simulator. Samples were tested using simulated gait data with incremental increasing loads to determine corrosion onset load and electrochemical activity. Half of each head size group were then cycled with simulated gait and the other half with gait compression only. Damage was measured by area and maximum linear wear depth. RESULTS Overall, 36 mm heads had lower corrosion onset load (p = 0.009) and change in open circuit potential (OCP) during simulated gait with (p = 0.006) and without joint movement (p = 0.004). Discontinuing gait's joint movement decreased corrosion currents (p = 0.042); however, wear testing showed no significant effect of joint movement on taper damage. In addition, 36 mm heads had greater corrosion area (p = 0.050), but no significant difference was found for maximum linear wear depth (p = 0.155). CONCLUSION Larger heads are more susceptible to taper corrosion; however, not due to frictional torque as hypothesized. An alternative hypothesis of taper flexural rigidity differential is proposed. Further studies are necessary to investigate the clinical significance and underlying mechanism of this finding. Cite this article: Bone Jt Open 2021;2(11):1004-1016.
Collapse
Affiliation(s)
- Christian M. Wight
- Institute of Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Cari M. Whyne
- Orthopaedic Biomechanics Laboratory, Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Earl R. Bogoch
- Department of Surgery, University of Toronto, Brookfield Chair in Fracture Prevention, Toronto, Ontario, Canada
| | - Radovan Zdero
- London Health Science Centre, Western University, London, Ontario, Canada
| | - Ryan M. Chapman
- London Health Science Centre, Western University, London, Ontario, Canada
| | - Douglas W. van Citters
- Thayer School of Engineering at Dartmouth College, Western University, Hanover, New Hampshire, USA
| | - William R. Walsh
- Surgical and Orthopaedic Research Laboratory, UNSW Prince of Wales Clinical School, Randwick, New South Wales, Australia
| | - Emil Schemitsch
- Division of Orthopaedic Surgery, Department of Surgery, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| |
Collapse
|
8
|
Feyzi M, Fallahnezhad K, Taylor M, Hashemi R. A review on the finite element simulation of fretting wear and corrosion in the taper junction of hip replacement implants. Comput Biol Med 2020; 130:104196. [PMID: 33516962 DOI: 10.1016/j.compbiomed.2020.104196] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/14/2020] [Accepted: 12/20/2020] [Indexed: 12/13/2022]
Abstract
Taperosis/trunnionosis is a scientific term for describing tribocorrosion (fretting corrosion) at the head-neck taper junction of hip implants where two contacting surfaces are undergone oscillatory micromotions while being exposed to the body fluid. Detached ions and emitted debris, as a result of taperosis, migrate to the surrounding tissues and can cause inflammation, infection, and aseptic loosening with an ultimate possibility of implant failure. Improving the tribocorrosion performance of the head-neck junction in the light of minimising the surface damage and debris requires a better understanding of taperosis. Given its complexity associated with both the mechanical and electrochemical aspects, computational methods such as the finite element method have been recently employed for analysing fretting wear and corrosion in the taper junction. To date, there have been more efforts on the fretting wear simulation when compared with corrosion. This is because of the mechanical nature of fretting wear which is probably more straightforward for modelling. However, as a recent research advancement, corrosion has been a focus to be implemented in the finite element modelling of taper junctions. This paper aims to review finite element studies related to taperosis in the head-neck junction to provide a detailed understanding of the design parameters and their role in this failure mechanism. It also reviews and discusses the methodologies developed for simulating this complex process in the taper junction along with the simplifications, assumptions and findings reported in these studies. The current needs and future research opportunities and directions in this field are then identified and presented.
Collapse
Affiliation(s)
- Mohsen Feyzi
- College of Science and Engineering, Medical Device Research Institute, Flinders University, Tonsley, SA, 5042, Australia
| | - Khosro Fallahnezhad
- College of Science and Engineering, Medical Device Research Institute, Flinders University, Tonsley, SA, 5042, Australia
| | - Mark Taylor
- College of Science and Engineering, Medical Device Research Institute, Flinders University, Tonsley, SA, 5042, Australia
| | - Reza Hashemi
- College of Science and Engineering, Medical Device Research Institute, Flinders University, Tonsley, SA, 5042, Australia.
| |
Collapse
|
9
|
Khullar P, Zhu D, Gilbert JL. Fretting corrosion of Si 3 N 4 vs CoCrMo femoral heads on Ti-6Al-V trunnions. J Orthop Res 2020; 38:1617-1626. [PMID: 32249959 DOI: 10.1002/jor.24681] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/07/2020] [Accepted: 03/25/2020] [Indexed: 02/04/2023]
Abstract
Fretting corrosion at the head-neck taper junction was compared between silicon nitride (Si3 N4 ) and commercially available cobalt chrome (CoCrMo) femoral heads on titanium (Ti-6Al-4V) trunnions. An electrochemical setup was used to capture the fretting currents (characterized by oxide abrasion and repassivation) during cyclic loading. Onset load, pull-off force (disassembly load), short term and long term (1 million cycles) fretting currents were used to compare the fretting corrosion performance between the test group (Si3 N4 /Ti-6Al-4V) and the control group (CoCrMo/Ti-6Al-4V). Incremental cyclic fretting corrosion tests showed that the Si3 N4 /Ti-6Al-4V combination had statistically lower (P < .05) average fretting current of 0.189 µA (SD = 0.114 µA) compared to 0.685 µA (SD = 0.630 µA) for CoCrMo/Ti-6Al-4V for cyclic load of 3200 N. Similarly, for the one million cycle fretting corrosion tests, the Si3 N4 /Ti-6Al-4V couples had statistically lower (P < .05) average current (0.048 µA, SD = 0.025 µA) vs CoCrMo/Ti-6Al-4V couples (0.366 µA, SD = 0.143 µA). The Si3 N4 heads also had higher onset loads (P < .05) for fretting (vs CoCrMo, 2200 N vs 1740 N) indicating a difference in surface contact mechanics between the two groups. Scanning electron microscopy with energy dispersive spectroscopy confirmed material transfer from the trunnions to the heads for both groups tested, and from head to trunnion for the CoCrMo heads. Minimal Si3 N4 transfer was noted. The electrochemical, mechanical, and microscopic inspection data supported the hypothesis that Si3 N4 /Ti-6Al-4Vcombination had better fretting corrosion performance compared to CoCrMo/Ti-6Al-4V.
Collapse
Affiliation(s)
- Piyush Khullar
- Clemson-MUSC Bioengineering Program, Charleston, South Carolina.,Department of Bioengineering, Clemson University, Clemson, South Carolina
| | - Dongkai Zhu
- Clemson-MUSC Bioengineering Program, Charleston, South Carolina.,Department of Bioengineering, Clemson University, Clemson, South Carolina
| | - Jeremy L Gilbert
- Clemson-MUSC Bioengineering Program, Charleston, South Carolina.,Department of Bioengineering, Clemson University, Clemson, South Carolina.,Orthopaedics and Physical Medicine, Medical University of South Carolina, Charleston, South Carolina
| |
Collapse
|
10
|
Effect of ZTA concentration on structural, thermal, mechanical and dielectric behavior of novel ZTA–PVA nanocomposite films. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2232-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
11
|
Bhalekar RM, Smith SL, Joyce TJ. Hip simulator testing of the taper-trunnion junction and bearing surfaces of contemporary metal-on-cross-linked-polyethylene hip prostheses. J Biomed Mater Res B Appl Biomater 2019; 108:156-166. [PMID: 30924612 DOI: 10.1002/jbm.b.34374] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 02/18/2019] [Accepted: 03/11/2019] [Indexed: 12/28/2022]
Abstract
Adverse reaction to metal debris released from the taper-trunnion junction of modular metal-on-polyethylene (MoP) total hip replacements (THRs) is an issue of contemporary concern. Therefore, a hip simulator was used to investigate material loss, if any, at both the articulating and taper-trunnion surfaces of five 32-mm metal-on-cross-linked-polyethylene THRs for 5 million cycles (Mc) with a sixth joint serving as a dynamically loaded soak control. Commercially available cobalt-chromium-molybdenum femoral heads articulating against cross-linked polyethylene (XLPE) acetabular liners were mounted on 12/14 titanium (Ti6Al4V) trunnions. Weight loss (mg) was measured gravimetrically and converted into volume loss (mm3 ) for heads, liners, and trunnions at regular intervals. Additionally, posttest volumetric wear measurements of the femoral tapers were obtained using a coordinate measuring machine (CMM). The surface roughness (Sa) of femoral tapers was measured posttest. After 5 Mc, the mean volumetric wear rate for XLPE liners was 2.74 ± 0.74 mm3 /Mc. The CMM measurements confirmed material loss from the femoral taper with the mean volumetric wear rate of 0.045 ± 0.024 mm3 /Mc. The Sa on the worn area of the femoral taper showed a significant increase (p < 0.001) compared with the unworn area. No other long-term hip simulator tests have investigated wear from the taper-trunnion junction of contemporary MoP THRs. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 108B:156-166, 2020.
Collapse
Affiliation(s)
- Rohan M Bhalekar
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, England, UK
| | - Simon L Smith
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, England, UK
| | - Thomas J Joyce
- School of Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, England, UK
| |
Collapse
|
12
|
Kyomoto M, Moro T, Yamane S, Watanabe K, Hashimoto M, Tanaka S, Ishihara K. Hydrated Phospholipid Polymer Gel-Like Layer for Increased Durability of Orthopedic Bearing Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1954-1963. [PMID: 29956942 DOI: 10.1021/acs.langmuir.8b01494] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Recently, traditional strategies for manipulating orthopedic bearing substrates have attempted to improve their wear resistance by adjusting polyethylene substrate through cross-linking and antioxidant blending. However, further research is required on the substrate, as well as the surface focused on the structure and role of articular cartilage. We therefore develop an orthopedic bearing surface comprising a nanometer-scale hydrated gel-like layer by grafting highly hydrophilic poly(2-methacryloyloxyethyl phosphorylcholine), with the aim of mimicking the lubrication mechanism of articular cartilage, and investigate its surface characteristics, bulk characteristics, and behavior under load bearing conditions upon accelerated aging. Neither the hydrophilicity nor lubricity of the gel-like surface was influenced by accelerated aging; instead, high stability was revealed, even under strong oxidation conditions. The characteristics of the hydrated gel-like surface potentiated the wear resistance of the cross-linked polyethylene liner, irrespective of accelerated aging. These results suggest that the hydrated gel-like surface enhances the longevity of cross-linked polyethylene bearings even under load-bearing conditions. Furthermore, the inflection point on the time series of wear can be a suitable indicator of the durability of the life-long protectant. In conclusion, the hydrated gel-like surface can positively increase orthopedic implant durability.
Collapse
Affiliation(s)
- Masayuki Kyomoto
- Department of Materials Engineering, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan
- Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8655 , Japan
- Medical R&D Center, Corporate R&D Group , KYOCERA Corporation , 800 Ichimiyake , Yasu 520-2362 , Japan
| | - Toru Moro
- Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8655 , Japan
- Sensory & Motor System Medicine, Faculty of Medicine , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8655 , Japan
| | - Shihori Yamane
- Department of Materials Engineering, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan
- Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8655 , Japan
- Medical R&D Center, Corporate R&D Group , KYOCERA Corporation , 800 Ichimiyake , Yasu 520-2362 , Japan
| | - Kenichi Watanabe
- Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8655 , Japan
- Medical R&D Center, Corporate R&D Group , KYOCERA Corporation , 800 Ichimiyake , Yasu 520-2362 , Japan
| | - Masami Hashimoto
- Materials Research and Development Laboratory , Japan Fine Ceramics Center , 2-4-1 Mutsuno , Atsuta-ku, Nagoya 456-8587 , Japan
| | - Sakae Tanaka
- Sensory & Motor System Medicine, Faculty of Medicine , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8655 , Japan
| | - Kazuhiko Ishihara
- Department of Materials Engineering, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-8656 , Japan
| |
Collapse
|