LncRNA DANCR involved osteolysis after total hip arthroplasty by regulating FOXO1 expression to inhibit osteoblast differentiation
Aseptic loosening of artificial hip joint is a major complication affecting the long-term use of the artificial hip joint, and is the main cause of joint replacement failure. However, the mechanism of aseptic ... (Source: Journal of Biomedical Science)
Source: Journal of Biomedical Science - January 16, 2018 Category: Biomedical Science Authors: Zhenyu Tang, Zongming Gong and Xiaoliang Sun Tags: Research Source Type: research
Pelvic tilt displacement before and after artificial hip joint replacement surgery
This study aimed to evaluate the effect of contralateral joint conditions on pelvic displacement after THA. (Source: The Journal of Arthroplasty)
Source: The Journal of Arthroplasty - October 15, 2017 Category: Orthopaedics Authors: Toru Nishiwaki, Ryosuke Hata, Akihito Oya, Masaya Nakamura, Morio Matsumoto, Arihiko Kanaji Tags: Original Article Source Type: research
An international comparison of the regional variation in clinical interventions: Germany and Austria
ConclusionsThe regional variation in selected surgical procedures can be analysed not only within each country separately, but also for Germany and Austria as a single unit, ignoring the border between them. In both countries, the regional cross-sectional analysis at the county level highlights regional distribution patterns whose causes merit further investigation. (Source: Journal of Public Health)
Source: Journal of Public Health - October 12, 2017 Category: Health Management Source Type: research
Does a micro-grooved trunnion stem surface finish improve fixation and reduce fretting wear at the taper junction of total hip replacements? A finite element evaluation
In this study, we asked whether a micro-grooved trunnion surface finish (1) improves the fixation and (2) reduces the wear rate at the taper junction of THRs. (Source: Journal of Biomechanics)
Source: Journal of Biomechanics - August 10, 2017 Category: Biomedical Science Authors: Ariyan Ashkanfar, David J. Langton, Thomas J. Joyce Source Type: research
Range of Motion Simulation of Hip Joint Movement during Salat Activity
Impingement of an artificial hip joint due to limited range of motion (RoM) during human activity is one of the main sources of hip joint failure. The aim of this paper is to simulate the RoMs of hip joints during salat, the practice of formal worship in Islam. (Source: The Journal of Arthroplasty)
Source: The Journal of Arthroplasty - March 31, 2017 Category: Orthopaedics Authors: J. Jamari, Iwan Budiwan Anwar, Eko Saputra, Emile van der Heide Tags: Original Articles Source Type: research
Spatial stress distribution analysis by thermoelastic stress measurement and evaluation of effect of stress concentration on durability of various orthopedic implant devices
Publication date: 1 June 2017 Source:Materials Science and Engineering: C, Volume 75 Author(s): Yoshimitsu Okazaki, Daisuke Ishii, Atsushi Ogawa Toward the development of highly durable devices, we investigated the effect of the thermoelastic constants of implantable raw metals and the surface stress distribution on the durability of various types of implant device by thermoelastic stress measurement and by evaluating the effect of the stress concentration. Surface stress was dynamically calculated from the bending moment, and the modulus of a section of a device was found to be consistent with the surface stress obta...
Source: Materials Science and Engineering: C - February 11, 2017 Category: Materials Science Source Type: research
Release of metal ions from nano CoCrMo wear debris generated from tribo-corrosion processes in artificial hip implants.
In this study, to accurately analyse the fresh wear debris retrieved from the hip simulator and the interaction between the particles and tribocorrosion of CoCrMo, wear debris was observed without protein digest, using a combined experimental approach involving the employment of TEM and ICP-MS. The results suggest that nanoscale wear debris generated from a hip simulator in bovine serum albumin (BSA) lubrication was Cr-rich, containing crystalline and amorphous structures; meanwhile, without any proteins, the wear particles mostly had an hcp-Co crystalline structure.
PMID: 28161662 [PubMed - as supplied by publishe...
Source: Journal of the Mechanical Behavior of Biomedical Materials - January 29, 2017 Category: Materials Science Authors: Wang Y, Yan Y, Su Y, Qiao L Tags: J Mech Behav Biomed Mater Source Type: research
Corrosion of the Head-Stem Taper Junction —Are We on the Verge of an Epidemic?
ConclusionNo, this is not the beginning of an epidemic. It is rather the consequence of disregarding known mechanical and electrochemical relationships, which in combination have recently caused a more frequent occurrence —and mainly reporting—of corrosion issues. (Source: HSS Journal)
Source: HSS Journal - September 19, 2016 Category: Orthopaedics Source Type: research
Improved mechanical properties of the new Ti-15Ta-xZr alloys fabricated by selective laser melting for biomedical application
In this study, we have developed new biocompatible Ti-15Ta-xZr (1.5, 5.5, 10.5 and15.5 wt%) alloys fabricated by selective laser melting. The SLM process inputs a mixture of 65% argon and 35% nitrogen to prevent oxidation and degradation of the alloys followed by appropriate post heat-treatment to improve the chemical homogeneity at high-temperatures. The microanalysis reveals that the microstructures of the Ti-15Ta-xZr alloys changed from α phase into β phase and finally became α + β stable. The Photomicrograph of the alloy mini-plate osteosynthesis in the rat’s tibia fracture reveals that the Ti-15Ta-10.5Zr allo...
Source: Journal of Alloys and Compounds - July 17, 2016 Category: Chemistry Source Type: research
Articular capsule repair in initial artificial hip replacement via anterolateral approach to the hip joint.
This study was carried out to explore articular capsule repair in first artificial hip replacement (AHR) via anterolateral approach and its influence on postoperative dislocation. A total of 292 patients who received AHR via anterolateral approach and had the articular capsule repaired in Peoples Hospital of Zhengzhou (Henan, China) from February 2008 to February 2014 were selected and divided into total hip replacement (THR) group (group A1) and artificial femoral head replacement (AFHR) group (group A2). Five hundred and five cases in the control group treated using the same approach but receiving no articular capsule ...
Source: Journal of Biological Regulators and Homeostatic Agents - July 2, 2016 Category: Biomedical Science Tags: J Biol Regul Homeost Agents Source Type: research
Some aspects of frictional measurements in hip joint simulators
This article attempts to share the thoughts behind over 40 years of measuring friction in artificial joints using the Durham Friction Simulators. This has led to accrued consistency of measurement and a robust scientific design rationale to understand the nature of friction in these spherical contacts. It also impacts on how to obtain accurate measurements as well as on the understanding of where the difficult issues lie and how to overcome them. (Source: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine)
Source: Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine - May 8, 2016 Category: Biomedical Engineering Authors: Unsworth, A. Tags: Special Issue Articles Source Type: research
Improved wear resistance of functional diamond like carbon coated Ti-6Al-4V alloys in an edge loading conditions.
This study investigates the durability of functional diamond-like carbon (DLC) coated titanium alloy (Ti-6Al-4V) under edge loading conditions for application in artificial hip joints. The multilayered (ML) functional DLC coatings consist of three key layers, each of these layers were designed for specific functions such as increasing fracture strength, adapting stress generation and enhancing wear resistance. A 'ball-on-disk' multi-directional wear tester was used in the durability test. Prior to the wear testing, surface hardness, modulus elasticity and Raman intensity were measured. The results revealed a significant we...
Source: Journal of the Mechanical Behavior of Biomedical Materials - April 8, 2016 Category: Materials Science Authors: Choudhury D, Lackner JM, Major L, Morita T, Sawae Y, Bin Mamat A, Stavness I, Roy CK, Krupka I Tags: J Mech Behav Biomed Mater Source Type: research
Calculating the hip center of rotation using contralateral pelvic anatomy
ABSTRACT
Failure to place an artificial hip in the optimal center of rotation results in poor hip function and costly complications. The aim of this study was to develop robust methodology to estimate hip center of rotation (hCoR) from preoperative computed tomography (CT) scans, using contralateral anatomy, in patients with unilateral diseased hips. Ten patients (five male, five female) with normal pelvic anatomy, and one patient with a unilateral dysplastic acetabulum were recruited from the London Implant Retrieval center image bank. 3D models of each pelvis were generated using commercial software. Two methods for esti...
Source: Journal of Orthopaedic Research - December 29, 2015 Category: Orthopaedics Authors: Matthieu Durand‐Hill, Johann Henckel, Keshthra Satchithananda, Shiraz Sabah, Jia Hua, Harry Hothi, Ronald J. Langstaff, John Skinner, Alister Hart Tags: Research Article Source Type: research
Multilayered TiAlN films on Ti6Al4V alloy for biomedical applications by closed field unbalanced magnetron sputter ion plating process.
In this study, a series of multilayered gradient TiAlN coatings were deposited on Ti6Al4V substrate using closed field unbalanced magnetron sputter ion plating (CFUBMSIP) process. Taguchi design of experiment approach was used to reveal the influence of depositing parameters to the film composition and performance of TiAlN coatings. The phase structure and chemical composition of the TiAlN films were characterized by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). Mechanical properties, including hardness, Young's modulus, friction coefficient, wear rate and adhesion strength were systematically eval...
Source: Appl Human Sci - December 16, 2015 Category: Physiology Authors: Yi P, Peng L, Huang J Tags: Mater Sci Eng C Mater Biol Appl Source Type: research
Calculating the hip centre of rotation using contralateral pelvic anatomy
This article is protected by copyright. All rights reserved (Source: Journal of Orthopaedic Research)
Source: Journal of Orthopaedic Research - December 2, 2015 Category: Orthopaedics Authors: Matthieu Durand‐Hill, Johann Henckel, Keshthra Satchithananda, Shiraz Sabah, Jia Hua, Harry Hothi, Ronald J Langstaff, John Skinner, Alister Hart Tags: Research Article Source Type: research
