keyword
https://read.qxmd.com/read/38428026/surface-modification-of-zn-cu-alloy-with-heparin-nanoparticles-for-urinary-implant-applications
#21
JOURNAL ARTICLE
Bukola O Awonusi, Hongwei Li, Zecheng Yin, Jing Zhao, Ke Yang, Jianzhong Li
In this work, an investigation on the Zn-Cu alloy coated with heparin was conducted in order to explore the potentiality of its application as a feasible alternative for biodegradable implants, with the specific goal of addressing the issue of encrustation in the urinary system. The stability of the nanoparticles were characterized by dynamic light scattering. Typical surface characterization such as X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy were used to demonstrate a successful immobilization of the NPs...
March 1, 2024: ACS Applied Bio Materials
https://read.qxmd.com/read/38417644/increasing-temperature-accelerates-ti-6al-4v-oxide-degradation-and-selective-dissolution-an-arrhenius-based-analysis
#22
JOURNAL ARTICLE
Michael A Kurtz, Kazzandra Alaniz, Lilliana M Taylor, Aldo Moreno-Reyes, Jeremy L Gilbert
Ti-6Al-4V selective dissolution occurs in vivo on orthopedic implants as the leading edge of a pitting corrosion attack. A gap persists in our fundamental understanding of selective dissolution and pre-clinical tests fail to reproduce this damage. While CoCrMo clinical use decreases, Ti-6Al-4V and the crevice geometries where corrosion can occur remain ubiquitous in implant design. Additionally, most additively manufactured devices cleared by the FDA use Ti-6Al-4V. Accelerated preclinical testing, therefore, would aid in the evaluation of new titanium devices and biomaterials...
February 26, 2024: Acta Biomaterialia
https://read.qxmd.com/read/38411355/a-novel-porous-titanium-with-engineered-surface-for-bone-defect-repair-in-load-bearing-position
#23
JOURNAL ARTICLE
Wei Liu, Dong Wang, Guo He, Tingting Li, Xianlong Zhang
Porous titanium exhibits low elastic modulus and porous structure is thought to be a promising implant in bone defect repair. However, the bioinert and low mechanical strength of porous titanium have limited its clinical application, especially in load-bearing bone defect repair. Our previous study has reported an infiltration casting and acid corrosion (IC-AC) method to fabricate a novel porous titanium (pTi) with 40% porosity and 0.4 mm pore diameter, which exerts mechanical property matching with cortical bone and interconnected channels...
February 27, 2024: Journal of Biomedical Materials Research. Part A
https://read.qxmd.com/read/38411089/evaluation-of-corrosion-performance-of-az31-mg-alloy-in-physiological-and-highly-corrosive-solutions
#24
JOURNAL ARTICLE
Berzah Yavuzyegit, Aikaterina Karali, Arianna De Mori, Nigel Smith, Sergey Usov, Pavel Shashkov, Roxane Bonithon, Gordon Blunn
Resorbable Mg and Mg alloys have gained significant interest as promising biomedical materials. However, corrosion of these alloys can lead to premature reduction in their mechanical properties, and therefore their corrosion rate needs to be controlled. The aim of this study is to select an appropriate environment where the effects of coatings on the corrosion rate of the underlying Mg alloy can be discerned and measured in a relatively short time period. The corrosion resistance of uncoated AZ31 alloy in different solutions [Hank's Balanced Salt Solution, 1× phosphate buffered solution (PBS), 4× PBS, 0...
February 27, 2024: ACS Applied Bio Materials
https://read.qxmd.com/read/38409581/phase-electronic-structure-tuning-via-pt-p-doped-ni-4-mo-implanted-ti-4-o-7-for-highly-efficient-water-splitting-and-mg-seawater-batteries
#25
JOURNAL ARTICLE
Van Hien Hoa, Sampath Prabhakaran, Mai Mai, Huyen Thi Dao, Do Hwan Kim
Fine-tuning nanoscale structures, morphologies, and electronic states are crucial for creating efficient water-splitting electrocatalysts. In this study, a method for electronic structure engineering to enhance overall water splitting in a corrosion-resistant electrocatalyst matrix by integrating Pt, P dual-doped Ni4 Mo electrocatalysts onto a Ti4 O7 nanorod grown on carbon cloth (Pt, P-Ni4 Mo-Ti4 O7 /CC) is introduced. By optimizing platinum and phosphorus concentrations to 1.18% and 2.42%, respectively, low overpotentials are achieved remarkably: 24 mV at 10 mA cm-2 for the hydrogen evolution reaction and 290 mV at 20 mA cm-2 for the oxygen evolution reaction in 1...
February 26, 2024: Small
https://read.qxmd.com/read/38406106/commercially-pure-titanium-implants-with-selenium-and-hyaluronic-acid-coating-for-dental-applications
#26
JOURNAL ARTICLE
Soorya Ganesh, Gheena S, Kalaiyarasan Madhu
Background The current study demonstrated improved efficiency of commercially pure titanium (CP-Ti) dental implants with a biocompatible coating of selenium (Se) and hyaluronic acid (HA).  Methods The sol-gel solution was made with hyaluronic acid and selenium nitrate in a 1:1 ratio. The coating sample was subjected to characterization studies such as Fourier Transform Infrared (FTIR) spectroscopy, surface morphology analysis, contact angle, etc., to confirm the coating. The antimicrobial activity of the coating was studied by analyzing the zone of inhibition...
January 2024: Curēus
https://read.qxmd.com/read/38405068/how-surface-to-volume-ratio-affects-degradation-of-magnesium-in-vitro-and-in-vivo-studies
#27
JOURNAL ARTICLE
Jiang Sun, Shan-Shan Liu, Da Zou, Xuan He, Zhang-Zhi Shi, Wei-Shi Li
Despite the many studies carried out over the past decade to determine the biodegradation performance of magnesium and its alloys, few studies focused on the effect of altered surface area to volume ratio on in vitro and in vivo degradation rate and osteogenesis. Here, high purity magnesium cylindrical rods with gradient of surface area to volume ratio were processed by excavating different numbers of grooves on the side surface. The immersion test in SBF solution and the rat femoral condylar bone defect model were used to evaluate the degradation of magnesium rods in vitro and in vivo , respectively...
February 21, 2024: RSC Advances
https://read.qxmd.com/read/38401324/pseudotumor-from-ceramic-on-ceramic-total-hip-arthroplasty
#28
Corrado Ciatti, Pietro Maniscalco, Silvia Bosio, Calogero Puma Pagliarello, Giuseppe Bianchi, Fabrizio Quattrini
INTRODUCTION AND IMPORTANCE: Total hip arthroplasty is one of the most performed surgical interventions in the world. Adverse local tissue reactions and pseudotumors are infrequent but dangerous eventualities, which are often related with metal-on-metal or metal-on-polyethylene implants. This study wants to highlight how adverse local tissue reactions and pseudotumors must be taken into consideration during the diagnostic process. CASE PRESENTATION: We report the case of a patient with ceramic-on-ceramic modular total hip arthroplasty with titanium neck...
February 13, 2024: International Journal of Surgery Case Reports
https://read.qxmd.com/read/38399030/ion-implantation-combined-with-heat-treatment-enables-excellent-conductivity-and-corrosion-resistance-of-stainless-steel-bipolar-plates-for-hydrogen-fuel-cells
#29
JOURNAL ARTICLE
Ruijuan Wang, Li Ding, Yong Pan, Xin Zhang, Meng Yang, Chengfei Zhu
316 L stainless steel is an ideal bipolar plate material for a proton exchange membrane fuel cell (PEMFC). However, the thickening of the passivation film on the stainless steel surface and the dissolution of corrosive ions during operation will affect the durability of the PEMFC. Herein, a heterogeneous layer is prepared on the surface of 316 L stainless steel through dual ion implantation of molybdenum ion and carbon ion combined with heat treatment to promote the corrosion resistance and conductivity of the bipolar plate...
February 6, 2024: Materials
https://read.qxmd.com/read/38395100/biodegradation-affected-fatigue-behavior-of-extrusion-based-additively-manufactured-porous-iron-manganese-scaffolds
#30
JOURNAL ARTICLE
Niko E Putra, Vahid Moosabeiki, Marius A Leeflang, Jie Zhou, Amir A Zadpoor
Additively manufactured (AM) biodegradable porous iron-manganese (FeMn) alloys have recently been developed as promising bone-substituting biomaterials. However, their corrosion fatigue behavior has not yet been studied. Here, we present the first study on the corrosion fatigue behavior of an extrusion-based AM porous Fe35Mn alloy under cyclic loading in air and in the revised simulated body fluid (r-SBF), including the fatigue crack morphology and distribution in the porous structure. We hypothesized that the fatigue behavior of the architected AM Fe35Mn alloy would be strongly affected by the simultaneous biodegradation process...
February 21, 2024: Acta Biomaterialia
https://read.qxmd.com/read/38391891/fretting-and-fretting-corrosion-behavior-of-additively-manufactured-ti-6al-4v-and-ti-nb-zr-alloys-in-air-and-physiological-solutions
#31
JOURNAL ARTICLE
Annsley O Mace, Michael A Kurtz, Jeremy L Gilbert
Additive manufacturing (AM) of orthopedic implants has increased in recent years, providing benefits to surgeons, patients, and implant companies. Both traditional and new titanium alloys are under consideration for AM-manufactured implants. However, concerns remain about their wear and corrosion (tribocorrosion) performance. In this study, the effects of fretting corrosion were investigated on AM Ti-29Nb-21Zr (pre-alloyed and admixed) and AM Ti-6Al-4V with 1% nano yttria-stabilized zirconia (nYSZ). Low cycle (100 cycles, 3 Hz, 100 mN) fretting and fretting corrosion (potentiostatic, 0 V vs...
February 5, 2024: Journal of Functional Biomaterials
https://read.qxmd.com/read/38391881/mechanical-properties-and-corrosion-rate-of-znag3-as-a-novel-bioabsorbable-material-for-osteosynthesis
#32
JOURNAL ARTICLE
Maria Roesner, Sergej Zankovic, Adalbert Kovacs, Moritz Benner, Roland Barkhoff, Michael Seidenstuecker
Osteosynthesis in fracture treatment typically uses hardware that remains in the patient's body, which brings a permanent risk of negative side effects such as foreign body reactions or chronic inflammation. Bioabsorbable materials, however, can degrade and slowly be replaced by autologous bone tissue. A suitable material is requested to offer great biocompatibility alongside excellent mechanical properties and a reasonable corrosion rate. Zinc-silver alloys provide these characteristics, which makes them a promising candidate for research...
January 25, 2024: Journal of Functional Biomaterials
https://read.qxmd.com/read/38387118/investigation-of-cell-accelerated-corrosion-cac-on-the-cocrmo-alloy-with-segregation-banding-hip-implant-applications
#33
JOURNAL ARTICLE
Hemalatha Kanniyappan, Kai-Yuan Cheng, Ravindra V Badhe, Mozart Neto, Divya Bijukumar, Mark Barba, Robin Pourzal, Mathew Mathew
Metal alloy microstructure plays a crucial role in corrosion associated with total hip replacement (THR). THR is a prominent strategy that uses metal implants such as cobalt-chromium-molybdenum (CoCrMo) alloys due to their advantageous biological and mechanical properties. Despite all benefits, these implants undergo corrosion and wear processes in-vivo in a synergistic manner called tribocorrosion. Also, the implant retrieval findings reported that fretting corrosion occurred in-vivo, evidenced by the damage patterns that appeared on the THR junction interfaces...
January 30, 2024: Journal of the Mechanical Behavior of Biomedical Materials
https://read.qxmd.com/read/38387058/exploration-of-microstructural-characteristics-mechanical-properties-and-in-vitro-biocompatibility-of-biodegradable-porous-magnesium-scaffolds-for-orthopaedic-implants
#34
JOURNAL ARTICLE
Debasish Debbarma, Nikhil Anand, Kaushik Pal
In this study, porous magnesium (Mg) scaffolds were investigated with varying strontium (Sr) and constant zinc (Zn) concentrations through the powder metallurgy process. All samples were examined at room temperature to evaluate their microstructure, mechanical and in-vitro degradation behavior, and biological properties. Results indicated that the addition of Sr was associated with fine average grain size, increased mechanical strength, and a decreased corrosion rate. All samples show small isolated and open interconnected pores (porosities: 18-30%, pores: 127-279 µm) with a suitable surface roughness of less than 0...
February 22, 2024: Biomedical Materials
https://read.qxmd.com/read/38382831/magnesium-lithium-thin-films-for-neurological-applications-an-in-vitro-investigation-of-glial-cytocompatibility-and-neuroinflammatory-response
#35
JOURNAL ARTICLE
Krathika Bhat, Luise Schlotterose, Lisa Hanke, Heike Helmholz, Eckhard Quandt, Kirsten Hattermann, Regine Willumeit-Römer
Lithium (Li), a widely used drug for bipolar disorder management, is associated with many side effects due to systemic exposure. The localized delivery of lithium through implants could be an approach to overcome this challenge, for which biodegradable magnesium (Mg)-based materials are a promising choice. In this study, we focus on Mg-Li thin film alloys as potential Li-releasing implants. Therefore, we investigated the in vitro short-term corrosion behavior and cytocompatibility of two alloys, Mg-1.6wt%Li and Mg-9...
February 19, 2024: Acta Biomaterialia
https://read.qxmd.com/read/38376231/biosurfactant-assisted-cu-doping-of-brushite-coatings-enhancing-structural-electrochemical-and-biofunctional-properties
#36
JOURNAL ARTICLE
Pakanati Siva Prasad, Prasanna Kumar Byram, Chinmay Hazra, Nishant Chakravorty, Ramkrishna Sen, Siddhartha Das, Karabi Das
Stainless steel (316L SS) has been widely used in orthopedic, cardiovascular stents, and other biomedical implant applications due to its strength, corrosion resistance, and biocompatibility. To address the weak interaction between steel implants and tissues, it is a widely adopted strategy to enhance implant performance through the application of bioactive coatings. In this study, Cu-doped brushite coatings were deposited successfully through pulse electrodeposition on steel substrates facilitated with a biosurfactant (BS) (i...
February 20, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38370200/tio-2-peg-as-smart-anticorrosion-and-drug-eluting-platforms-in-inflammatory-conditions
#37
JOURNAL ARTICLE
Sulieman Ibraheem Shelash Al-Hawary, Ruqayah Taher Habash, Munther Abosaooda, Ahmed Hjazi, Ebraheem Abdu Musad Saleh, Zahraa F Hassan, Masoud Soroush Bathaei
The failure of a titanium implant is often attributed to inflammatory reactions following implantation. This study focuses on the synthesis of a polyethylene glycol (PEG) layer on porous titanium dioxide (TiO2 ) coatings using plasma electrolytic oxidation (PEO). This PEG layer serves as a foundation for a drug-eluting platform designed to respond to pH stimuli during inflammation. Betamethasone (BET), a widely used anti-inflammatory drug, was loaded onto the pH-responsive functional PEG layers. The application of the PEG-BET layer onto TiO2 coatings through the vacuum dip coating method resulted in a pH-sensitive sustained release of BET over a 30-day period...
February 29, 2024: Heliyon
https://read.qxmd.com/read/38362138/structural-and-temporal-dynamics-analysis-of-zinc-based-biomaterials-history-research-hotspots-and-emerging-trends
#38
REVIEW
Kunshan Yuan, Chengchen Deng, Lili Tan, Xiangxiu Wang, Wenhua Yan, Xiaozhen Dai, Ruolin Du, Yufeng Zheng, Haijun Zhang, Guixue Wang
OBJECTIVES: To examine the 16-year developmental history, research hotspots, and emerging trends of zinc-based biodegradable metallic materials from the perspective of structural and temporal dynamics. METHODS: The literature on zinc-based biodegradable metallic materials in WoSCC was searched. Historical characteristics, the evolution of active topics and development trends in the field of zinc-based biodegradable metallic materials were analyzed using the bibliometric tools CiteSpace and HistCite...
May 2024: Bioactive Materials
https://read.qxmd.com/read/38343423/early-detection-of-fretting-corrosion-in-hip-replacement-by-acoustic-emission-non-invasive-technique
#39
JOURNAL ARTICLE
Bill Keaty, Yani Sun, Ozevin Didem, Jacob Eapen, Mathew Mathew
The present study aimed to investigate the feasibility of using acoustic emission (AE) as a detection method for identifying failure mechanisms at the modular junction interface in total hip replacements (THRs) subjected to fretting corrosion. The experimental setup involved simulating fretting corrosion using a Ti6Al4V disc representing the femoral neck and a ZrO2 pin representing the femoral head. Mechanical testing provided insights into the wear and frictional behavior occurring at the modular junction interface...
January 15, 2024: Thin Solid Films
https://read.qxmd.com/read/38339916/dual-protection-inorganic-protein-coating-on-mg-based-biomaterials-through-tooth-enamel-inspired-biomineralization
#40
JOURNAL ARTICLE
Ziqian Zhao, Wenting Yu, Wenshuai Yang, Guohao Zhang, Charley Huang, Jianmin Han, Ravin Narain, Hongbo Zeng
Biocompatible magnesium alloys represent revolutionary implantable materials in dentistry and orthopedics but face challenges due to rapid bio-corrosion, necessitating protective coatings to mitigate dysfunction. Directly integrating durable protective coatings onto Mg surfaces is challenging because of intrinsic low coating compactness. Herein, inspired by tooth enamel, a novel highly compact dual-protection inorganic-protein (inorganicPro) coating is in-situ constructed on Mg surfaces through bovine serum albumin (BSA) protein-boosted reaction between sodium fluoride (NaF) and Mg substrates...
February 10, 2024: Advanced Materials
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