Aims. The aim of this study was to evaluate the long-term clinical
and radiographic outcomes of the
We report the findings of an independent review
of 230 consecutive
We present the clinical results and survivorship
of consecutive 100
Aims. The
Aims. The
Hip resurfacing is a bone-conserving procedure with respect to proximal femoral resection, but there is debate in the literature as to whether the same holds true for the acetabulum. We have investigated whether the
The effects of the method of fixation and interface conditions on the biomechanics of the femoral component of the
Aims. The first aim of this study was to evaluate whether preoperative renal function is associated with postoperative changes in whole blood levels of metal ions in patients who have undergone a
We report the survival, radiological and functional outcomes of a single surgeon series of his first 144 consecutive
Aims. It is not known whether change in patient-reported outcome measures (PROMs) over time can be predicted by factors present at surgery, or early follow-up. The aim of this study was to identify factors associated with changes in PROM status between two-year evaluation and medium-term follow-up. Patients and Methods. Patients undergoing
When the
We report the outcome at a minimum of five years of 110 consecutive metal-on-metal
Aims. The aim of this study was to assess the functional gain achieved following hip resurfacing arthroplasty (HRA). Patients and Methods. A total of 28 patients (23 male, five female; mean age, 56 years (25 to 73)) awaiting
Femoral neck fracture is a recognised complication of
We present a consecutive case cohort of the first 100
A concern of metal on metal hip resurfacing arthroplasty is long term exposure to Cobalt (Co) and Chromium (CR) wear debris from the bearing. This study compares whole blood metal ion levels from patients drawn at one-year following
We report an independent prospective review of the first 230
Purpose: To find the incidence of Periprosthitic fracture following
Purpose of study. This study is to determine the survival and outcomes of the
To review the early functional results of
Despite the increasing interest and subsequent published literature on hip resurfacing arthroplasty, little is known about the prevalence of its complications and in particular the less common modes of failure. The aim of this study was to identify the prevalence of failure of hip resurfacing arthroplasty and to analyse the reasons for it. From a multi-surgeon series (141 surgeons) of 5000
The rate and mode of early failure in 463
Introduction. In the early 2000s hip resurfacing became an established bone conserving hip arthroplasty option particularly for the fit and active patient cohort. The performance of second-generation metal-on-metal bearings had led to the reintroduction of hip resurfacing. The
The purpose of this study is to show our experience with
We describe the experience with the first consecutive 230
Modern Metal on Metal hip resurfacing originated from
We report a 12- to 15-year implant survival assessment
of a prospective single-surgeon series of
The Articular Surface Replacement (ASR) hip resurfacing arthroplasty has a failure rate of 12.0% at five years, compared with 4.3% for the
Introduction: The
Introduction: Femoral neck failure due to avascular necrosis (AVN) is one of the most significant complications following resurfacing hip arthroplasty. It is likely that the surgical approach is one of the factors influenc-ing the development of AVN. Positron emission tomography (PET) is the only form of imaging that allows visualisation of bone metabolic activity deep to a metal surface. Objectives: To establish the reliability and accuracy of PET using fluorine-18 to evaluate viability of the femoral head and neck after resurfacing hip arthroplasty. To assess the viability of ten proximal femora after
Introduction: Hip Resurfacing has always been an attractive concept for the treatment of hip arthritis in young patients. Excellent early and medium-term results have been reported with the
Introduction: The
Introduction: Although resurfacing hip replacements are widely used there are few little independent outcome data to support this. The aim of this study was to report the 5 year clinical outcome and 7 year survival of an independent series. Method: 610
Aims: To review the early results of
Few independent studies have reported the outcome of resurfacing arthroplasty of the hip. The aim of this study was to report the five-year clinical outcome and seven-year survival of an independent series. A total of 610
Between April 1999 and April 2004, 3497
The
The early designs of hip resurfacing implants suffered high rates of early failure, making it impossible to obtain valuable mid-term radiostereophotogrammetric (RSA) results. The metal-on-metal
Aim: The purpose of this study was to analyze the in-vivo wear rates of
We present the results of our initial experience with the use of the
My experience with
Hip resurfacing is being performed more frequently in the United Kingdom. The possible benefits include more accurate restoration of leg length, femoral offset and femoral anteversion than occurs after total hip arthroplasty (THA). We compared anteroposterior radiographs from 26 patients who had undergone hybrid THA (uncemented cup/cemented stem), with 28 who had undergone
We compared the medium-term clinical and radiological results of hybrid total hip replacement (THR) with metal-on-metal
The dysplasia cup, which was devised as an adjunct to the
A cadaver study using six pairs of lower limbs was conducted to investigate the accuracy of computer navigation and standard instrumentation for the placement of the
Introduction: Hip resurfacing has undergone a resurgence of interest in the past five years. With it, the awareness of femoral neck fractures associated with this prosthesis has grown. We report the first national review of femoral neck fractures over a four-year period. Method: All surgeons using the
The use of
This is a longitudinal study of the daily urinary output and the concentrations in whole blood of cobalt and chromium in patients with metal-on-metal resurfacings over a period of four years. Twelve-hour urine collections and whole blood specimens were collected before and periodically after a
We compared the long-term clinical and radiological results of hybrid total hip replacement (THR) with metal-on-metal
Background: Metal on metal resurfacing of the hip is an attractive conservative treatment option for the younger, active arthritic patient. It has the advantages of bone preservation and the longevity of metal bearing surfaces. Concerns remain over the performance of these implants due to historical failure of similar devices. The possible longer-term survival of these implants can only be justified if the early results are as successful as conventional hip replacement. Patients &
Methods: The clinical and radiological follow-up of our first 25 consecutive resurfacing patients is presented. The
Aim: We present the outcome of
Thirty nine
The
There has been renewed interest in metal-on-metal bearings as hip resurfacing components for treatment in young, active patients. This study examines the effects of fixation (cemented or uncemented heads) and bone-implant interface conditions (stem-bone and head-bone) on the biomechanics of the
Aims. We investigated whether blood metal ion levels could effectively
identify patients with bilateral
Surface replacement arthroplasty (SRA) has been proposed as a viable option for the treatment of osteoarthritis in young, active patients. Positive results of the
The
We undertook this study to determine whether the concerns regarding early complications following hip resurfacing were justified. One hundred and twenty-nine consecutive resurfacing procedures (118 patients, mean age 52.3 years) utilising the
We report the survival at ten years of 173 consecutive
Maintenance of the bone stock is a primary goal in hip surgery. The idea of a resurfacing hip prosthesis had already been proposed in the past without success. The improvement in prosthetic materials, however, has mades it possible to reconsider the use of resurfacing prostheses. We report our experience with the
Introduction: The
Introduction: The results of
Introduction. The results of the
The
Introduction. Since the introduction of 3rd generation Metal-on-Metal-Hip-Resurfacing-Arthroplasty (MoMHRA), thousands of such prostheses have been implanted worldwide in younger patients with end-stage hip osteoarthritis. However, no independent centre has reported their medium-to-long term outcome. The aim of this study is to report the ten year survival and outcome of the
Introduction: The incidence of younger people requiring arthroplasty is on the rise. Metal on metal Hybrid hip resurfacing arthroplasty is an exciting alternative to conventional arthroplasty, to Orthopaedic surgeons, in young active patients where preserving bone stock is important. Materials and Methods: All patients with a hybrid
Introduction: The
Conversion of failed femoral components of total hip resurfacing to conventional hip replacement is reportedly a straightforward procedure. There is little published to qualify this and what is available suffers from small study numbers and various combinations pre and post-operative implants. Between 1997 and 2002, the Oswestry Outcome Centre prospectively collected data on 5000
We report the long-term survival and functional
outcome of the
Introduction: Conversion of failed femoral components of total hip resurfacing to conventional hip replacement is reportedly a straightforward procedure. There is little published to qualify this and what is available suffers from small study numbers and various combinations pre and post-operative implants. Method: Between 1997 and 2002, the Oswestry Outcome Centre prospectively collected data on 5000
Introduction: Interest in hip resurfacing has recently been renewed by the introduction of metal-on-metal designs; it is being increasingly used for young patients, with over 30,000 implanted worldwide. The 5 year clinical results appear promising, but there are no long term data available. Radiostereometry (RSA) measures of implant migration have been able to predict implant failure; specifically large and continuous migration predicts aseptic loosening. We present the results of a five year RSA study examining the migration of the
Approximately 46,000 total hip replacements are performed in the U.K. annually with a dislocation rate between 2 and 5%.
Introduction: There has been a renewed interest in metal-on-metal bearing for total hip replacement with the benefit of a larger head size and decreased incidence of dislocation. In the revision hip scenario cementation of a polyethylene liner, for a previously compromised liner fixation mechanism into a preexisting well-fixed shell or a cage, has become an accepted method to decrease the morbidity of the procedure. Perhaps Bir-mingham cementless cups could be used as cemented devices in primary and revision hip surgery where a cementless cup is not possible. Aim: To study the pull-out strength of cemented Bir-mingham sockets in an experimental model. Materials and Methods: Eight
Introduction: Hip resurfacing is a renaissance of metal on metal hip arthroplasty. It preserves bone stock and a large head allows greater range of motion. This new technique is gaining popularity among patients and surgeons alike. We present a nine year follow up in the context of survival, function and complications. Methods: We analysed follow up data of 4778 patients who have had hip resurfacing using
Introduction: The
The
We report the survival, functional and radiological outcome of a series of
This study reports the early results of
Aim: Hip resurfacing is a bone conserving procedure with respect to proximal femoral resection. For previous generations of conservative hip replacement, preservation of the natural femoral head diameter necessitated additional sacrifice of acetabular bone in order to accommodate a sufficiently thick polyethylene acetabular component. We have investigated whether the BHR offers a bone conserving procedure with respect to the acetabular bone stock. Method: We reviewed 284
Introduction. Secondary osteoarthritis in a dysplastic hip is a surgical challenge. Severe leg length discrepancies and torsional deformities add to the problem of inadequate bony support available for the socket. Furthermore, many of these patients are young and wish to remain active, thereby jeopardising the long-term survival of any arthroplasty device. For such severely dysplastic hips, the
A review of the first two hundred and ten patients undergoing
Introduction: We aimed to examine the effect of neck notching during hip resurfacing on the strength of the proximal femur. Methods: Third generation composite femurs that have been shown to replicate the biomechanical properties of human bone were utilised. Imageless computer navigation was used to position the initial guide wire during head preparation. Six specimens were prepared without a superior notch being made in the neck of the femur, six were prepared in an inferiorly translated position to cause a 2mm notch in the superior femoral neck and six were prepared with a 5mm notch. All specimens had radiographs taken to ensure that the stem shaft angle was kept constant. The specimens were then loaded to failure in the axial direction with an Instron mechanical tester. A three dimensional femoral finite element model was constructed and molded with a femoral component constructed from the dimensions of a
Abstract: resurfacing hip arthroplasty has shown promising early results in the treatment of hip arthrosis in younger patients as published from specialist centres in the United Kingdom. We are reporting early results and complications of
Introduction: Recently, high-flexion knee implants have been developed to provide for a large range of motion (ROM >
120°) after total knee arthroplasty (TKA). High-flexion knee implants are more likely subjected to large knee loads than conventional implants since knee joint forces increase with larger flexion angles. Highly conforming knee replacements are designed to minimise polyethylene peak stresses during (deep) knee flexion. The
Metal-metal hip resurfacing offers the advantage of conservation of femoral bone stock. In addition, the implant may offer enhanced resistance to dislocation in comparison with conventional total hip arthroplasty. We present a series of 32 female patients with one to 4 year follow up (mean age 57 ranges 50–70 at time of surgery). All patients required hip arthroplasty. Careful preoperative selection was carried out with particular attention paid to estimation of bone density. A standard resurfacing operation was carried out. Patients had pre and postoperative WOMAC and SF36 scoring. All patients were followed closely in the post operative period. No significant complications were noted at follow up. In our study we have shown that given careful patient selection
We describe our early experience with the implantation of the first consecutive 231 primary
Introduction: While the explant device has made revision of uncemented acetabular components technically easier, the unique design of the
Introduction: The need to meet the demands for a hip replacement that will allow young patients to maintain a high activity level with the expectation of enhanced longevity has been the Holy Grail of modern orthopaedic practice for some time. Novel bearing surfaces and methods of component fixation have not as yet managed to sate this need. The
Background: High volumetric wear of polyethylene was the main factor in periprosthetic bone resorption and the failure of historic metal or ceramic on polyethylene hip resurfacing prosthesis. Metal on metal devices reduce the wear substantially and may solve this problem. The present study describes the clinical and radiographic results of our first 300 hips treated with the
Introduction: Metal on metal hip resurfacing is a bone conserving procedure with excellent medium term results. A retrospective audit of 150 consecutive
Introduction: We compared the eight- to ten-year clinical and radiological results of the metal-on-metal
Introduction: As candidates for arthroplasty become younger and life expectancy increases the required working life of a total hip arthroplasty continues to rise. Hip resurfacing offers potential further advantages in young patients as minimal bone resection makes for easier revision, and the design allows for an increased range of movement. The
Introduction. Hip resurfacing (HRA) designer centres have reported survivorships between 88.5–96% at 12 years. Arthroplasty Registries (AR) reported less favourable results especially in females gender and small sizes. The aim of this study was to evaluate the minimum 10-year survival and outcome of the
Hip resurfacing arthroplasty is emerging as an increasingly popular, conservative option for the treatment of end-stage osteoarthritis in the young and active patient. Despite the encouraging clinical results of hip resurfacing, aseptic loosening and femoral neck fracture remains concerns for the success of this procedure. This study used finite element analysis (FEA) to analyse the stresses within proximal femoral bone resulting from implantation with a conservative hip prosthesis. FEA is a computational method used to analyse the performance of real-world structures through the development of simplified computational models using essential features. The aim of this study was to examine the correlation between the orientation of the femoral component of a hip resurfacing prosthesis (using the
Introduction: The Trent arthroplasty register reported that results of Hip arthroplasty in general setup were less than that reported from specialist centres by 5%. This independent prospective study tests the hypothesis that results of
Background: This study was undertaken to investigate the differences in the metal ion serum concentrations after implantation of a MetaSUL-THR and a
Hip resurfacing has been proposed as an alternative
to traditional total hip arthroplasty in young, active patients.
Much has been learned following the introduction of metal-on-metal resurfacing
devices in the 1990s. The triad of a well-designed device, implanted
accurately, in the correct patient has never been more critical
than with these implants. Following Food and Drug Administration approval in 2006, we studied
the safety and effectiveness of one hip resurfacing device (Birmingham
Hip Resurfacing) at our hospital in a large, single-surgeon series.
We report our early to mid–term results in 1333 cases followed for
a mean of 4.3 years (2 to 5.7) using a prospective, observational
registry. The mean patient age was 53.1 years (12 to 84); 70% were
male and 91% had osteoarthritis. Complications were few, including
no dislocations, no femoral component loosening, two femoral neck
fractures (0.15%), one socket loosening (0.08%), three deep infections
(0.23%), and three cases of metallosis (0.23%). There were no destructive
pseudotumours. Overall survivorship at up to 5.7 years was 99.2%. Aseptic survivorship
in males under the age of 50 was 100%. We believe this is the largest
United States series of a single surgeon using a single resurfacing
system. Cite this article:
Purpose: We report a series of 117 consecutive metal-on-metal