TJ Joyce
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View article: An Analysis of the Food and Drug Administration Manufacturer and User Facility Device Experience Database for MAGnetic Expansion Control Spinal Rods
An Analysis of the Food and Drug Administration Manufacturer and User Facility Device Experience Database for MAGnetic Expansion Control Spinal Rods Open
Background MAGnetic Expansion Control (MAGEC) rods can prevent repeated lengthening operations for scoliosis patients. However, there have been several Field Safety Notices issued, including a worldwide product recall due to actuator endca…
View article: Is MAGEC X better than earlier designs of magnetically controlled growing rod: an explant study
Is MAGEC X better than earlier designs of magnetically controlled growing rod: an explant study Open
Purpose Determine the performance of MAGEC X rods through retrieval analysis and comparison with clinical data. Methods A multicentre explant database was searched to identify cases using MAGEC X device. Clinical and surgical data was gath…
View article: Significantly less wear of UHMWPE rubbing against pyrocarbon than against CoCr
Significantly less wear of UHMWPE rubbing against pyrocarbon than against CoCr Open
The history of joint replacement can be framed as a battle to reduce wear. Pyrocarbon has been shown to be a low wear material, but can low wear against an ultra high molecular weight polyethylene (UHMWPE) counterface be achieved? To inves…
View article: Explant analysis of a chromium nitride coated metal-on-metal total wrist replacement: A case study
Explant analysis of a chromium nitride coated metal-on-metal total wrist replacement: A case study Open
Explant analysis can provide important understanding of how artificial joints perform in the human body. The articulating surfaces of the metacarpal head and the radius cup from a chromium nitride coated metal-on-metal Motec wrist implant …
View article: Investigation of the short-term in vivo performance of metal-on-carbon fibre reinforced poly ether ether ketone Motec wrists: an explant analysis
Investigation of the short-term in vivo performance of metal-on-carbon fibre reinforced poly ether ether ketone Motec wrists: an explant analysis Open
Total wrist arthroplasty (TWA) aims to restore pain-free motion to diseased joints. One such TWA, the Motec, has demonstrated good results with acceptable complication rates. It has recently been suggested that the metal-on-carbon fibre re…
View article: The impact of femoral head size on the wear evolution at contacting surfaces of total hip prostheses: A finite element analysis
The impact of femoral head size on the wear evolution at contacting surfaces of total hip prostheses: A finite element analysis Open
Total Hip Arthroplasty has been a revolutionary technique in restoring mobility to patients with damaged hip joints. The introduction of modular components of the hip prosthesis allowed for bespoke solutions based on the requirements of th…
View article: Investigation of the In Vivo Performance of Metal-on-Metal Motec Total Wrist Arthroplasty – An Explant Analysis
Investigation of the In Vivo Performance of Metal-on-Metal Motec Total Wrist Arthroplasty – An Explant Analysis Open
Background Despite the Motec metal-on-metal (MoM) total wrist arthroplasty (TWA) being among the most implanted and most reported implants, there remains concern about the articulation following the issues in hips, where early wear led to …
View article: Multi-functional bioactive silver- and copper-doped diamond-like carbon coatings for medical implants
Multi-functional bioactive silver- and copper-doped diamond-like carbon coatings for medical implants Open
Diamond-like carbon (DLC) coatings doped with bioactive elements of silver (Ag) and copper (Cu) have been receiving increasing attention in the last decade, particularly in the last 5 years, due to their potential to offer a combination of…
View article: Metal debris release is commonly seen from explanted total ankle replacements
Metal debris release is commonly seen from explanted total ankle replacements Open
This study aimed to characterise the damage mechanisms present on the metal components used in various contemporary total ankle replacements. Twenty-seven explanted total ankle replacements comprising 8 different designs (3 fixed bearing a…
View article: Testing the efficiency of Bronze Age axes: An interdisciplinary experiment
Testing the efficiency of Bronze Age axes: An interdisciplinary experiment Open
This paper discusses an interdisciplinary research project testing the efficiency of European Bronze Age axes through experiments with replica tools and the usewear analysis of prehistoric axe-heads from the collections of the Great North …
View article: Explant analysis of a Discocerv cervical disc: A case study for a ceramic-on-ceramic cervical disc
Explant analysis of a Discocerv cervical disc: A case study for a ceramic-on-ceramic cervical disc Open
Explant analyses are key to better understanding the effectiveness of medical implants in replacing natural joints. For the first time, an explanted Discocerv cervical disc was examined. The implant utilised the articulation of a caudal zi…
View article: The influence of HLA genotype on the development of metal hypersensitivity following joint replacement
The influence of HLA genotype on the development of metal hypersensitivity following joint replacement Open
Background Over five million joint replacements are performed across the world each year. Cobalt chrome (CoCr) components are used in most of these procedures. Some patients develop delayed-type hypersensitivity (DTH) responses to CoCr imp…
View article: Comparative retrieval analysis of contemporary mobile and fixed unicompartmental knee bearing designs
Comparative retrieval analysis of contemporary mobile and fixed unicompartmental knee bearing designs Open
There are two different concepts behind Unicompartmental Knee Replacement (UKR). Mobile bearings, as exemplified by the Oxford UKR, and fixed bearings, as exemplified by the Physica ZUK. These are the two most commonly implanted UKRs in th…
View article: The influence of hla genotype on the development of metal hypersensitivity following joint replacement
The influence of hla genotype on the development of metal hypersensitivity following joint replacement Open
Joint replacement surgery provides pain relief and restoration of mobility for millions of patients around the world each year.[1] However, the release of wear debris from implant surfaces can limit the lifespan of a prosthesis through the…
View article: Retrieval analysis of the PRECICE OPTY-LINE magnetically controlled realignment nail: A report of two cases
Retrieval analysis of the PRECICE OPTY-LINE magnetically controlled realignment nail: A report of two cases Open
The OPTY-LINE extendable nail is a magnetically-controlled, intra-medullary realignment device that is specifically designed for open-wedge high tibial osteotomy (HTO). The aim of this study was to perform a comprehensive retrieval analysi…
View article: Framing the failure of medical implants: Media representations of the ASR hip replacements in the UK
Framing the failure of medical implants: Media representations of the ASR hip replacements in the UK Open
Background During the twentieth century, hip replacement became one of the most popular and successful operations. In the 1990s, a new type of hip replacement namely the metal‐on‐metal hip resurfacing was developed. This paper draws on one…
View article: Aseptic lymphocyte-dominated vasculitis-associated lesions are related to changes in metal ion handling in the joint capsules of metal-on-metal hip arthroplasties
Aseptic lymphocyte-dominated vasculitis-associated lesions are related to changes in metal ion handling in the joint capsules of metal-on-metal hip arthroplasties Open
Objectives We have encountered patients who developed large joint fluid collections with massive elevations in chromium (Cr) and cobalt (Co) concentrations following metal-on-metal (MoM) hip arthroplasties. In some cases, retrieval analysi…
View article: Explant analysis of the Biomet Magnum/ReCap metal-on-metal hip joint
Explant analysis of the Biomet Magnum/ReCap metal-on-metal hip joint Open
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 o…
View article: Potential Synthetic Biolubricant as an Alternative to Bovine Serum
Potential Synthetic Biolubricant as an Alternative to Bovine Serum Open
It is crucial that orthopaedic implant materials are tested in conditions that replicate the natural body’s environment as closely as possible. Bovine serum is currently recommended for use by the International Organisation for Standardisa…
View article: A Tribological Assessment of Ultra High Molecular Weight Polyethylene Types GUR 1020 and GUR 1050 for Orthopedic Applications
A Tribological Assessment of Ultra High Molecular Weight Polyethylene Types GUR 1020 and GUR 1050 for Orthopedic Applications Open
The wear properties of biomaterials have been demonstrated to have a high importance within orthopedic bearing surfaces. This study performed a comparison of the wear between the two main grades of Ultra High Molecular Weight Polyethylene …
View article: Evaluating the Surface Topography of Pyrolytic Carbon Finger Prostheses through Measurement of Various Roughness Parameters
Evaluating the Surface Topography of Pyrolytic Carbon Finger Prostheses through Measurement of Various Roughness Parameters Open
The articulating surfaces of four different sizes of unused pyrolytic carbon proximal interphalangeal prostheses (PIP) were evaluated though measuring several topographical parameters using a white light interferometer: average roughness (…
View article: Retrospective cohort study of the performance of the Pinnacle metal on metal (MoM) total hip replacement: a single-centre investigation in combination with the findings of a national retrieval centre
Retrospective cohort study of the performance of the Pinnacle metal on metal (MoM) total hip replacement: a single-centre investigation in combination with the findings of a national retrieval centre Open
Objectives To determine risk factors for revision in patients implanted with a commonly used metal on metal (MoM) hip replacement. Design Retrospective cohort study in combination with a prospective national retrieval study (Northern Retri…