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Soltani-Kordshuli F, Choudhury D, Goss JA, Campbell M, Smith E, Sonntag S, Niyonshuti II, Okyere D, Smeltzer MS, Chen J, Zou M. Cartilage-inspired surface textures for improved tribological performance of orthopedic implants. J Mech Behav Biomed Mater 2023; 138:105572. [PMID: 36435033 DOI: 10.1016/j.jmbbm.2022.105572] [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: 06/28/2022] [Revised: 08/16/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022]
Abstract
Joint replacements have become one of the most common orthopedic procedures due to the significant demands of retaining functional mobility. While these procedures are of great value to patients, there are some limitations. Durability is the most important limitation associated with joint replacement that needs to be addressed due to the increasing number of younger patients. Titanium is a commonly used implant material which has high biocompatibility, high strength-to-density ratio, and high corrosion resistance. However, current titanium implants have poor wear resistance which shortens their lifespan. In this study, microscale dimples with four different dimple shapes (circular, triangular, square, and star) of similar sizes to the pores found in natural articular cartilage were fabricated on titanium disks to improve implant lubrication and reduce wear. Biotribology tests were performed on dimpled and non-dimpled titanium disks in a condition similar to that inside of a patient's body. It was shown that dimpling the titanium disks optimized the lubricant film formation and decreased the wear rate significantly while also reducing the coefficient of friction (COF). The star-shaped dimples had the lowest COF and almost no detectable wear after 8 h of testing. To investigate whether dimpling increased bacterial colonization due to increased surface area, and to determine whether any increase could be limited by coating with antibacterial materials, bacterial colonization with Staphylococcus aureus was tested with non-dimpled and star-shaped dimpled titanium disks with and without coating with polydopamine (PDA), silver (Ag) nanoparticles (NPs), and PDA + Ag NPs. It was found that dimpling did not increase bacterial colonization, and that coating with PDA, Ag NPs, or PDA + Ag NPs did not decrease bacterial colonization. Nevertheless, we conclude that star-shaped dimpled titanium surfaces have potential utility as more durable orthopedic implants.
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Affiliation(s)
- Firuze Soltani-Kordshuli
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Dipankar Choudhury
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Josue A Goss
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Mara Campbell
- Department of Microbiology & Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Evelyn Smith
- Department of Computer Science and Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Steven Sonntag
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Isabelle I Niyonshuti
- Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Deborah Okyere
- Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Materials Science and Engineering Program, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Mark S Smeltzer
- Department of Microbiology & Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA; Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA
| | - Jingyi Chen
- Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, 72701, USA
| | - Min Zou
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR, 72701, USA; Center for Advanced Surface Engineering, University of Arkansas, Fayetteville, AR, 72701, USA.
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Zhu D, Liu Y, Gilbert JL. In vitro fretting crevice corrosion damage of CoCrMo alloys in phosphate buffered saline: Debris generation, chemistry and distribution. Acta Biomater 2020; 114:449-459. [PMID: 32771589 DOI: 10.1016/j.actbio.2020.07.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/21/2020] [Accepted: 07/30/2020] [Indexed: 12/17/2022]
Abstract
Fretting crevice corrosion in modular tapers of total hip replacements has become a major concern in orthopedic medical devices. Solid and ionic debris arising from fretting crevice corrosion have been implicated in device failure and revision surgery. This study aims to use a 2D pin-on-disk fretting corrosion test system to visualize damage progression and debris generation during fretting corrosion of CoCrMo alloys in phosphate buffered saline (PBS). The results provide direct evidence of rapid debris generation during fretting corrosion (after only 12 min of testing). Debris was generated and either extruded from the contact region or impacted into adjacent crevice sites as long as fretting continued. After testing, the fretting region consisted of a damaged and plastically deformed contact region surrounded by a halo of fretting debris consisting entirely of oxides and phosphates within the crevice region. Evidence of pitting corrosion and grain boundary corrosion was observed. Solid debris consisted of chromium (Cr), phosphate (P) and oxygen (O). X-ray photoelectron spectroscopy analysis of the near-fretted metal surface area showed a thicker oxygen (O1s) containing film with the depth profile of O1s above 10% penetrating up to 5.75 nm while the O1s concentration on the unfretted area fell to below 10% after 1 nm depth. Ion concentration in the PBS, measured using inductively coupled mass spectrometry, showed cobalt (Co) ions were most prevalent (1.46 ppm) compared to chromium (Cr) (0.07 ppm) and molybdenum (Mo) (0.05 ppm) (p <0.05). All of these results are consistent with the analysis of in vivo modular taper corrosion processes. STATEMENT OF SIGNIFICANCE: CoCrMo alloys has been widely used as a metallic biomaterial for implant devices and can lose their durability and reliability due to wear, corrosion and tribocorrosion. Debris, as one of the major products of these reactions, is associated with implant device failure. In the first time, we developed a fretting corrosion testing system to visualize the debris generation process in real-time between CoCrMo alloy pin and disk samples. Debris was generated rapidly during fretting corrosion and some of the debris egressed from the crevice site while also accumulating within the crevice area as fretting continued. Our study opens a new method for future studies to advance understanding of debris generation processes during wear and tribocorrosion phenomenon.
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Affiliation(s)
- Dongkai Zhu
- Syracuse Biomaterials Institute, Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, United States; Clemson - MUSC Bioengineering Program, Department of Bioengineering, Clemson University and the Medical University of South Carolina, 68 Presidents Street, Charleston, SC 20425, United States
| | - Yangping Liu
- Syracuse Biomaterials Institute, Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, United States; Clemson - MUSC Bioengineering Program, Department of Bioengineering, Clemson University and the Medical University of South Carolina, 68 Presidents Street, Charleston, SC 20425, United States
| | - Jeremy L Gilbert
- Syracuse Biomaterials Institute, Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, NY 13244, United States; Clemson - MUSC Bioengineering Program, Department of Bioengineering, Clemson University and the Medical University of South Carolina, 68 Presidents Street, Charleston, SC 20425, United States.
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3
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Biomechanical Performance of the Cemented Hip Stem with Different Surface Finish. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9194082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The integrity of the cemented fixation interface is responsible for the long-term longevity of artificial hip prostheses. Metallic stems with roughened surfaces are considered to provide stronger adhesion with cement. However, clinical studies have reported that roughened stems show a lower survival rate than polished stems. These studies clearly reveal that the causes of artificial stem loosening are very complicated and multifaceted. Therefore, this study was conducted to investigate the mechanical effect of stem surface finish in cemented hip replacement. To accomplish this, a series of cement–metal specimens were tested configurations to assess the mechanical characteristics of the cement–metal interface specimens. A finite elemental model of cemented femoral prostheses was then created, in which the cement–stem interface was assumed to be in different bonding states according to the experimentally measured interface properties. The failure probabilities of the cement mantle and cemented interface under physiological loadings were evaluated. Experimental results indicate that the polished metal produced higher interfacial tensile and lower shearing strengths than the roughened metal. The polished stems were predicted to induce a lower failure probability of cement mantle and higher integrity of the cement–stem interface when compared to the roughened stem. Overall, current results provide significant evidence to support the clinical outcomes of cemented hip prostheses with different stem surface finishes.
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Abdelgaied A, Fisher J, Jennings LM. A comprehensive combined experimental and computational framework for pre-clinical wear simulation of total knee replacements. J Mech Behav Biomed Mater 2017; 78:282-291. [PMID: 29195220 PMCID: PMC5776076 DOI: 10.1016/j.jmbbm.2017.11.022] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/10/2017] [Accepted: 11/13/2017] [Indexed: 12/02/2022]
Abstract
A more robust pre-clinical wear simulation framework is required in order to simulate wider and higher ranges of activities, observed in different patient populations such as younger more active patients. Such a framework will help to understand and address the reported higher failure rates for younger and more active patients (National_Joint_Registry, 2016). The current study has developed and validated a comprehensive combined experimental and computational framework for pre-clinical wear simulation of total knee replacements (TKR). The input mechanical (elastic modulus and Poisson’s ratio) and wear parameters of the moderately cross-linked ultra-high molecular weight polyethylene (UHMWPE) bearing material were independently measured from experimental studies under realistic test conditions, similar to the loading conditions found in the total knee replacements. The wear predictions from the computational wear simulation were validated against the direct experimental wear measurements for size 3 Sigma curved total knee replacements (DePuy, UK) in an independent experimental wear simulation study under three different daily activities; walking, deep squat, and stairs ascending kinematic conditions. The measured compressive mechanical properties of the moderately cross-linked UHMWPE material were more than 20% lower than that reported in the literature under tensile test conditions. The pin-on-plate wear coefficient of moderately cross-linked UHMWPE was significantly dependant of the contact stress and the degree of cross-shear at the articulating surfaces. The computational wear predictions for the TKR from the current framework were consistent and in a good agreement with the independent full TKR experimental wear simulation measurements, with 0.94 coefficient of determination of the framework. In addition, the comprehensive combined experimental and computational framework was able to explain the complex experimental wear trends from the three different daily activities investigated. Therefore, such a framework can be adopted as a pre-clinical simulation approach to optimise different designs, materials, as well as patient’s specific total knee replacements for a range of activities.
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Al Thaher Y, Perni S, Prokopovich P. Nano-carrier based drug delivery systems for sustained antimicrobial agent release from orthopaedic cementous material. Adv Colloid Interface Sci 2017; 249:234-247. [PMID: 28477865 DOI: 10.1016/j.cis.2017.04.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 04/25/2017] [Accepted: 04/26/2017] [Indexed: 12/22/2022]
Abstract
Total joint replacement (TJR), such as hip and knee replacement, is a popular procedure worldwide. Prosthetic joint infections (PJI) after this procedure have been widely reported, where treatment of such infections is complex with high cost and prolonged hospital stay. In cemented arthroplasties, the use of antibiotic loaded bone cement (ALBC) is a standard practice for the prophylaxis and treatment of PJI. Recently, the development of bacterial resistance by pathogenic microorganisms against most commonly used antibiotics increased the interest in alternative approaches for antimicrobial delivery systems such as nanotechnology. This review summarizes the efforts made to improve the antimicrobial properties of PMMA bone cements using nanotechnology based antibiotic and non-antibiotic delivery systems to overcome drawbacks of ALBC in the prophylaxis and treatment of PJIs after hip and knee replacement.
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Affiliation(s)
- Yazan Al Thaher
- School of Pharmacy and Pharmaceutical Science, Cardiff University, Cardiff, UK
| | - Stefano Perni
- School of Pharmacy and Pharmaceutical Science, Cardiff University, Cardiff, UK
| | - Polina Prokopovich
- School of Pharmacy and Pharmaceutical Science, Cardiff University, Cardiff, UK.
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Choudhury D, Lackner J, Fleming RA, Goss J, Chen J, Zou M. Diamond-like carbon coatings with zirconium-containing interlayers for orthopedic implants. J Mech Behav Biomed Mater 2017; 68:51-61. [PMID: 28152443 DOI: 10.1016/j.jmbbm.2017.01.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 01/11/2017] [Accepted: 01/13/2017] [Indexed: 02/08/2023]
Abstract
Six types of diamond-like carbon (DLC) coatings with zirconium (Zr)-containing interlayers on titanium alloy (Ti-6Al-4V) were investigated for improving the biotribological performance of orthopedic implants. The coatings consist of three layers: above the substrate a layer stack of 32 alternating Zr and ZrN sublayers (Zr:ZrN), followed by a layer comprised of Zr and DLC (Zr:DLC), and finally a N-doped DLC layer. The Zr:ZrN layer is designed for increasing load carrying capacity and corrosion resistance; the Zr:DLC layer is for gradual transition of stress, thus enhancing layer adhesion; and the N-doped DLC layer is for decreasing friction, squeaking noises and wear. Biotribological experiments were performed in simulated body fluid employing a ball-on-disc contact with a Si3N4 ball and a rotational oscillating motion to mimic hip motion in terms of gait angle, dynamic contact pressures, speed and body temperature. The results showed that the Zr:DLC layer has a substantial influence on eliminating delamination of the DLC from the substrates. The DLC/Si3N4 pairs significantly reduced friction coefficient, squeaking noise and wear of both the Si3N4 balls and the discs compared to those of the Ti-6Al-4V/Si3N4 pair after testing for a duration that is equivalent to one year of hip motion in vivo.
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Affiliation(s)
- Dipankar Choudhury
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR 72701, USA
| | - Juergen Lackner
- JOANNEUM RESEARCH Forschungsgesellschaft mbH, Institute of Surface Technologies and Photonics, Functional Surfaces, Leobner Strasse 94, A-8712 Niklasdorf, Austria
| | - Robert A Fleming
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR 72701, USA
| | - Josh Goss
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR 72701, USA
| | - Jingyi Chen
- Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR 72701, USA
| | - Min Zou
- Department of Mechanical Engineering, University of Arkansas, Fayetteville, AR 72701, USA.
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Li W, Li N, Zheng Y, Yuan G. Fretting properties of biodegradable Mg-Nd-Zn-Zr alloy in air and in Hank's solution. Sci Rep 2016; 6:35803. [PMID: 27812007 PMCID: PMC5095712 DOI: 10.1038/srep35803] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 10/03/2016] [Indexed: 12/28/2022] Open
Abstract
Fretting is a significant cause for the failure of orthopedic implants. Currently, since magnesium and its alloys have been developed as promising biodegradable implant materials, the fretting behavior of the Mg alloys is of great research significance. In this study, a Mg-Nd-Zn-Zr alloy (hereafter, denoted as JDBM alloy) was selected as experimental material, and its fretting behaviors were evaluated under 5 N, 10 N and 20 N normal loads with a displacement of 200 μm under the frequency of 10 Hz at 37 °C in air and in Hank’s solution, respectively. The results indicated that while the friction coefficient decreased with the increment of the normal load, the wear volume of the alloy increased with the increment of the normal load both in air and in Hank’s solution. Both the friction coefficients and the wear volume of the fretting in Hank’s solution were much lower than those in air environment. The evolution trend of friction coefficients with time had different performance in air environment and the Hank’s solution group. Although oxidation occurred during the fretting tests in Hank’s solution, the damage of JDBM alloy was still reduced due to the lubrication effects of Hank’s solution. Moreover, the addition of Fetal bovine serum (FBS) could act as lubrication and result in the reduction of the fretting damage.
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Affiliation(s)
- Wenting Li
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Nan Li
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Yufeng Zheng
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Guangyin Yuan
- National Engineering Research Center of Light Alloys Net Forming, Shanghai Jiao Tong University, Shanghai 200240, China
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