Aims. Isolated acetabular liner exchange with a highly crosslinked
Aims. The aim of our study was to investigate the effect of asymmetric crosslinked
Aims. Oxidized zirconium (OxZi) and highly cross-linked
Aims. The primary objective of this study was to compare the five-year tibial component migration and wear between highly crosslinked
Aims. The purpose of this study was to assess mid-term survivorship following primary total knee arthroplasty (TKA) with Optetrak Logic components and identify the most common revision indications at a single institution. Methods. We identified a retrospective cohort of 7,941 Optetrak primary TKAs performed from January 2010 to December 2018. We reviewed the intraoperative findings of 369 TKAs that required revision TKA from January 2010 to December 2021 and the details of the revision implants used. Kaplan-Meier analysis was used to determine survivorship. Cox regression analysis was used to examine the impact of patient variables and year of implantation on survival time. Results. The estimated survivorship free of all-cause revision was 98% (95% confidence interval (CI) 97% to 98%), 95% (95% CI 95% to 96%), and 86% (95% CI 83% to 88%) at two, five, and ten years, respectively. In 209/369 revisions there was a consistent constellation of findings with varying severity that included
Aims. The use of cementless total knee arthroplasty (TKA) components has increased during the past decade. The initial design of cementless metal-backed patellar components had shown high failure rates due to many factors. The aim of this study was to evaluate the clinical results of a second-generation cementless, metal-backed patellar component of a modern design. Methods. This was a retrospective review of 707 primary TKAs in 590 patients from a single institution, using a cementless, metal-backed patellar component with a mean follow-up of 6.9 years (2 to 12). A total of 409 TKAs were performed in 338 females and 298 TKAs in 252 males. The mean age of the patients was 63 years (34 to 87) and their mean BMI was 34.3 kg/m. 2. (18.8 to 64.5). The patients were chosen to undergo a cementless procedure based on age and preoperative radiological and intraoperative bone quality. Outcome was assessed using the Knee Society knee and function scores and range of motion (ROM), complications, and revisions. Results. A total of 24 TKAs (3.4%) in 24 patients failed and required revision surgery, of which five were due to patellar complications (0.71%): one for aseptic patellar loosening (0.14%) and four for
Aims. Robotic arm-assisted surgery offers accurate and reproducible guidance in component positioning and assessment of soft-tissue tensioning during knee arthroplasty, but the feasibility and early outcomes when using this technology for revision surgery remain unknown. The objective of this study was to compare the outcomes of robotic arm-assisted revision of unicompartmental knee arthroplasty (UKA) to total knee arthroplasty (TKA) versus primary robotic arm-assisted TKA at short-term follow-up. Methods. This prospective study included 16 patients undergoing robotic arm-assisted revision of UKA to TKA versus 35 matched patients receiving robotic arm-assisted primary TKA. In all study patients, the following data were recorded: operating time,
Aims. The use of vitamin E-infused highly crosslinked
Aims. A significant reduction in wear at five and ten years was previously reported when comparing Durasul highly cross-linked
Aims. Uncemented metal acetabular components show good osseointegration, but material stiffness causes stress shielding and retroacetabular bone loss. Cemented monoblock
Aims. Highly cross-linked
Aims. Vitamin E-infused highly cross-linked
Aims. The aim of this study was to compare the migration of the femoral component, five years postoperatively, between patients with a highly cross-linked
Aims. The primary outcome was investigating differences in wear, as measured by femoral head penetration, between cross-linked vitamin E-diffused
Aims. The aim of this study was to evaluate the performance of first-generation annealed highly cross-linked
Aims. Wear of the
Aims. Vitamin E-infused highly crosslinked
Aims. The aim of this study was to establish the results of isolated exchange of the tibial
Aims. We aimed to investigate if the use of the largest possible cobalt-chromium head articulating with
Aims. The aim of this study was to evaluate the surface damage, the density of crosslinking, and oxidation in retrieved antioxidant-stabilized highly crosslinked
Aims. There is insufficient evidence to recommend the use of alternative
Aims. The aim of this study was to investigate whether wear and backside deformation of
Aims. We aimed to evaluate the long-term outcome of highly cross-linked
Knee arthroplasty surgery is a highly effective treatment for arthritis and disorders of the knee. There are a wide variety of implant brands and types of knee arthroplasty available to surgeons. As a result of a number of highly publicized failures, arthroplasty surgery is highly regulated in the UK and many other countries through national registries, introduced to monitor implant performance, surgeons, and hospitals. With time, the options available within many brand portfolios have grown, with alternative tibial or femoral components, tibial insert materials, or shapes and patella resurfacings. In this study we have investigated the effect of the expansion of implant brand portfolios and where there may be a lack of transparency around a brand name. We also aimed to establish the potential numbers of compatible implant construct combinations. Hypothetical implant brand portfolios were proposed, and the number of compatible implant construct combinations was calculated.Aims
Methods
Aims. The aim of this study was to identify the effect of the manufacturing characteristics of
Aims. Several short- and mid-term studies have shown minimal liner wear of highly cross-linked
The creep and wear behaviour of highly cross-linked
We conducted a systematic review and meta-analysis of randomised controlled trials comparing cross-linked with conventional
Aims. Vitamin E-diffused, highly crosslinked
Ultra-high-molecular-weight
Aims. The most frequent indication for revision surgery in total hip arthroplasty (THA) is aseptic loosening. Aseptic loosening is associated with
Aims. The primary aim of this study was to compare the wear properties of vitamin E-diffused, highly crosslinked
The Oxford Unicompartmental Knee replacement (UKR) was introduced as a design to reduce
The Oxford unicompartmental knee replacement (UKR) was designed to minimise wear utilising a fully-congruent, mobile,
In this prospective study we studied the effect
of the inclination angle of the acetabular component on
Wear of
We present a case of early retrieval of an Oxinium femoral head and corresponding
Aims. The aim of this study was to determine whether there is a difference
in the rate of wear between acetabular components positioned within
and outside the ‘safe zones’ of anteversion and inclination angle. Patients and Methods. We reviewed 100 hips in 94 patients who had undergone primary
total hip arthroplasty (THA) at least ten years previously. Patients
all had the same type of acetabular component with a bearing couple
which consisted of a 28 mm cobalt-chromium head on a highly crosslinked
polyethylene (HXLPE) liner. A supine radiostereometric analysis
(RSA) examination was carried out which acquired anteroposterior
(AP) and lateral paired images. Acetabular component anteversion
and inclination angles were measured as well as total femoral head
penetration, which was divided by the length of implantation to
determine the rate of
Aims. Radiostereometric analysis (RSA) studies of vitamin E-doped, highly crosslinked
The Norwegian Arthroplasty Register has shown that several designs of uncemented femoral stems give good or excellent survivorship. The overall findings for uncemented total hip replacement however, have been disappointing because of poor results with the use of metal-backed acetabular components. In this study, we exclusively investigated the medium-to long-term performance of primary uncemented metal-backed acetabular components. A total of 9113 primary uncemented acetabular components were implanted in 7937 patients between 1987 and 2007. These were included in a prospective, population-based observational study. All the implants were modular and metal-backed with ultra-high-molecular-weight
There are many methods for analysing wear volume in failed
Aims. Our aim in this study was to describe a continuing review of
11 total hip arthroplasties using 22.225 mm Alumina ceramic femoral
heads on a Charnley flanged femoral component, articulating against
a silane crosslinked
Nanometre-sized particles of ultra-high molecular weight
Between 1999 and 2001, 90 patients underwent
total hip replacement using the same uncemented acetabular and femoral
components with a 28 mm metallic femoral head but with prospective
randomisation of the acetabular liner to either Durasul highly cross-linked
polyethylene or nitrogen-sterilised Sulene
The purpose of this study was to undertake a
meta-analysis to determine whether there is lower
We examined radiographic
We examined 86
We made a clinical study of
Isolated wear of the
Retrieval studies of total hip replacements with highly cross-linked ultra-high-molecular-weight