Category Archives: HR Devices Medical Studies

Medical studies about hip resurfacing devices including metal on metal and ceramic on ceramic.

Hip Resurfacing Devices Medical Studies

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Gait after Birmingham Hip Resurfacing Study 2019 by Wiik, Lambkin & Cobb

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Gait after Birmingham Hip Resurfacing an age-matched controlled prospective study
Anatole V. Wiik, Rhiannon LambkinJustin P. CobbPublished Online: https://doi.org/10.1302/0301-620X.101B11.BJJ-2019-0383.R1
Conclusion
Patients undergoing HRA improved their preoperative gait pattern of a significant limp to a symmetrical gait at high speeds and on inclines, almost indistinguishable from normal controls. HRA with an approved device offers substantial functional gains, almost indistinguishable from healthy controls. Read Full Study Here:  https://online.boneandjoint.org.uk/doi/full/10.1302/0301-620X.101B11.BJJ-2019-0383.R1 … Read the rest

Mortality after Hip Resurfacing VS THR Medical Study

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Original Abstract Available Here:  https://www.ncbi.nlm.nih.gov/pubmed/30963072

Mortality after hip resurfacing versus total hip arthroplasty in young patients: a single surgeon experience.
Brooks PJ1, Samuel LT1, Levin JM1, Sultan AA1, Khlopas A1, Brigati D1, Ng M1, Greenwald AS1, Mont MA2.
Author information    Department of Orthopaedic Surgery, Cleveland Clinic, Cleveland, OH, USA. & Department of Orthopaedic Surgery, Lenox Hill Hospital, New York, NY, USA.

Background:

The aims of this study were to investigate the following questions: (I) what are the mortality rates in patients age 55 years and younger who underwent a hip resurfacing arthroplasty (HRA) versus a standard total hip arthroplasty (THA)? (II) is the type of operation independently associated with mortality?

…Conclusions:

We have demonstrated that patients age 55 and younger who undergo HRA have a … Read the rest

Five to Ten-Year Results of the Birmingham Hip Resurfacing Implant in the U.S. 2018

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International surgeon series and registry data have demonstrated positive outcomes and long-term survival of the Birmingham Hip Resurfacing (BHR) implant. We report the 5 to 10-year results from a single center in the U.S.

Read or download the pdf here

…Conclusions: BHR demonstrated excellent survivorship and clinical outcomes at 5 to 10 years in selected patients. As compared with total hip arthroplasty, the use of the BHR may provide highly active patients with clinically important advantages in postoperative activity as well as a greater likelihood of remaining highly active. Continued follow-up is
necessary to validate long-term BHR outcomes…

A Single Institution’s Experience

Marcus C. Ford, MD, Michael D. Hellman, MD, Gregory S. Kazarian, John C. Clohisy, MD,
Ryan M. Nunley, MD, Robert L. Barrack, MD… Read the rest

Hip Resurfacing Using Highly Cross-linked Polyethylene Study 2016

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Read Complete Study Here

By  Pritchett JW

In this prospective study, 190 hip resurfacing procedures (164 participants) were performed using a cobalt-chromium femoral component and a cementless acetabular cup with a 3.8-mm highly cross-linked polyethylene acetabular liner…

…The mean follow-up was 8.5 (range, 7-10) years…

…(With Highly Cross-linked Polyethylene device) The low incidence of osteolysis and the low rate of wear found on retrievals suggest that many years of use in highly active patients is possible.… Read the rest

Outcomes of the Birmingham Hip Resurfacing System Study 2016

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Clinical and Functional Outcomes of the Birmingham Hip Resurfacing System by Cecilia Pascual-Garrido, MD; Brandon L. Morris, MD; Michael R. Dayton, MD

This study reported the outcomes of patients treated with the Birmingham Hip Resurfacing System (Smith & Nephew, Memphis, Tennessee) to identify the prevalence of complications and failures. A retrospective review of 202 patients (206 hips) was performed. Outcomes were assessed clinically with Harris Hip Score at 6 and 12 months and then yearly…

…According to the authors’ results, the Birmingham Hip Resurfacing System resulted in good clinical outcomes at 4 years. Survival and outcomes in women, particularly those with modest bone size, are inferior. ..

…At 3 years, mean survival was better for men than for women (99% vs … Read the rest

Long-term Outcome of a Metal-on-Polyethylene Cementless Hip Resurfacing Study 2014

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Tan TL, Ebramzadeh E, Campbell PA, Al-Hamad M, Amstutz HC

…it may be beneficial to investigate the long-term outcome of hip resurfacings using metal-on-polyethylene in the 1980’s. We report the long-term survivorship and modes of failure of a cementless metal-on-polyethylene resurfacing.

Ongoing developments using the lessons learned from these previous generation components and utilizing modern low wear materials, e.g., cross-linked polyethylene, may lead to improved implants for future hip resurfacings.

 

 … Read the rest

Conserve Plus 3-5 Year Outcome Study 2015

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Read Complete Study Here Results of Conserve Plus Hip Resurfacing: prospective clinical, radiographic and ion study.  Somers JF, Vanbiervliet J, Lefevere F. We report the 3- to 5-year clinical results of 42 hip resurfacing arthroplasties using the Conserve Plus from one surgeon series… …This independent series of Conserve Plus HRA confirms good results at short- to mid-term with excellent wear characteristics. Results for avascular necrosis were equal to those for osteoarthritis…… Read the rest

Global Study on Hip Resurfacing Implants 2015 – 2021

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Read Complete Article Here Hip resurfacing techniques are used to treat hip fractures while avoiding total hip replacement procedure… …Healthcare professionals prefer hip resurfacing surgery over total hip replacement surgery due to advantages of this technique over total hip replacement surgery… …Currently, North America dominates the hip resurfacing implants market followed by Europe… …Hip Resurfacing Implants market estimates and forecasts(2015 -2021)… available in this report… Read the rest

Hip Resurfacing and Conventional THR Comparison of Acetabular Bone Stock Removal, Leg Length, and Offset Medical Study 2013

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 http://www.healio.com/orthopedics/journals/ORTHO/%7BACDF855C-1EA2-4525-9017-3B3127D94918%7D/Hip-Resurfacing-and-Conventional-THA-Comparison-of-Acetabular-Bone-Stock-Removal-Leg-Length-and-Offset Nicholas M. Brown, MD; Jared R. H. Foran, MD; Craig J. Della Valle, MD May 2013 The purpose of this study was to compare total hip arthroplasty (THA) and hip resurfacing arthroplasty (HRA) with regard to the amount of acetabular bone stock removed and the ability to restore leg length and offset. Anteroposterior pelvis radiographs of 153 consecutive THAs and 84 consecutive HRAs were compared. Excluded patients were those with prior hip surgery, those in which a best-fit circle could not be adequately matched to the femoral head, and those with preoperative radiographic findings that precluded consideration for HRA (ie, disease severity, deformity, leg-length discrepancy). A significant difference was found between THA and HRA with regards to age and sex but not primary diagnosis.… Read the rest

Metal-on-Metal Hip Resurfacing: The Effect of Component Position

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Link 2006 D.H. Williams; U. Masood; and M.N. Norton Royal Cornwall Hospital, Truro, Cornwall TR1 3LJ, UK.

Decreased head-neck ratio diameter and component malposition in total hip arthroplasty are factors known to result in impingement, increased rates of dislocation, wear and failure. In addition to these complications, impingement of the femoral neck on the acetabular component of a hip resurfacing may result in femoral neck fracture and loosening of the acetabular component. Little is known regarding the optimum femoral and acetabular hip resurfacing component position to avoid impingement.

In the first part of this study we analyzed the radiographic component position of 131 consecutive hip resurfacings. In the second part the effect of three component variables on the range of motion to impingement were analyzed

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10 year survival of double heat-treated resurfacings McMinn Center

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Joseph Daniel, Director of Research at the McMinn Center in Birmingham UK,  talks about the 10 year survival of double heat-treated resurfacings from 1996 and the effect that these heat treatments had on this series of hip resurfacings.

The McMinn Centre
25 Highfield Road
Edgbaston
Birmingham B15 3DP
Tel: 0121 455 0411
Fax: 0121 455 0259
email:enquiries@mcminncentre.co.uk

http://www.mcminncentre.co.uk/

Also view


Mr. McMinn’s
Interview

Mr.
McMinn’s BHR Videos

Mr. McMinn’s Profile

… Read the rest

Hip Resurfacing With the Biomet 7-Year Results 2012 by Dr. Gross

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Hip Resurfacing With the Biomet Hybrid ReCap-Magnum System: 7-Year Results by Dr. Gross & Fei Liu 2012
Gross TP, Liu F. – Midlands Orthopaedics, P.A., Columbia, SC. Abstract The purpose of this study was to report our clinical outcome of a large series of metal-on-metal hip resurfacing arthroplasty (HRA) using the hybrid Biomet ReCap-Magnum system. This is a single-designer surgeon series with an average of 5 ± 1 years. Seven hundred forty consecutive hybrid HRAs were performed in 653 patients. Kaplan-Meier survivorship with any revision as an end point was 96.4% at 7 years. Twenty-five (3.4%) cases were revised: 8 due to acetabular component loosening, 6 due to femoral neck facture, 4 due to failure of femoral component fixation, 2 due to deep infection, 2
… Read the rest

Larger cups and optimal positioning produced lowest ion levels by David Langton

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Larger cups and optimal positioning produced lowest ion levels and wear

In a review of 585 blood serum evaluations following hip resurfacing, only femoral size and cup inclination were found to have an effect on ion levels, according a study by orthopedic investigators.

The findings were presented at the 2010 Annual Meeting of the American Academy of Orthopaedic Surgeons.

David J. Langton, MRCS, and his colleagues also found that the size of the coverage angle of the acetabular component contributed significantly to its tolerance of suboptimal positioning.

“Larger joints, it must be emphasized, tolerated suboptimal cup position,” he said. “This must be taken into account in all analyses.”

Inverse relationships

Using routinely obtained blood serum metal ion levels from patients under the care of the

… Read the rest

Incidence of Adverse Wear Reactions in Hip Resurfacing Study by Dr. Gross 2012

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by Thomas P. Gross, MD (d),

Fei Liu, PhD (d) 
Incidence of Adverse Wear Reactions in Hip Resurfacing Arthroplasty: A Comparison with the Oxford StudyThomas P. Gross, MD (d), Fei Liu, PhD (d) Midlands Orthopaedics, Columbia, SCIntroduction

In 2009, the Oxford Group reported a 1.8% rate of revision for pseudotumours in a series of 1419 hip resurfacings performed by multiple surgeons within a mean 4 year (0-9 years) time period and a 6% Kaplan-Meier failure rate for pseudotumour by 8 years. We were surprised by this high rate of failure due to a primary inflammatory reaction to metal bearings (pseudotumour) and we therefore wanted to evaluate our database for the incidence of failure we experienced due to pseudotumours.

Methods

Between July 1999 and August

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Bone density of the femoral neck following BHR Study

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Bone density of the femoral neck following Birmingham Hip Resurfacing  A 2-year prospective study in 27 hips 

Authors: Nick J. Cooke a;  Lauren

Rodgers b;  David Rawlings c;  Andrew W.
McCaskie d; James P. Holland d

Affiliations:

a North Tees and Hartlepool Hospital,

b Statistics Department, University of
Newcastle,

c Medical Physics and,

d Orthopaedics, Freeman Hospital,
Newcastle upon Tyne, UK

Abstract

Background
Resurfacing is a popular
alternative to a standard
hip replacement in young
arthritic patients. Despite
bone preservation around the
femoral component, there is
little information regarding
the bone quality.

Patients and methods
32 patients underwent
consecutive Birmingham hip
resurfacing. The bone
density of the femoral neck
was measured preoperatively
and then at 6 weeks, 3
months, 1 year,

… Read the rest

Mid-term Results of Hip Resurfacing Dr. Brooks 2015

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Alternative Bearing Surfaces (Hip) Presented at AAOS by Dr. Peter J. Brooks on Tuesday, March 24, 2015 7:00 AM

Author(s): Carlos A. Higuera, MD, Bay Village, Ohio; Kurt P. Spindler, MD, Garfield Hts, Ohio; Gregory J. Strnad, MS, Lyndhurst, Ohio; Peter J. Brooks, MD, FRCS(C) Cleveland, Ohio

INTRODUCTION:

Hip resurfacing has been proposed as a suitable procedure for young, active patients. Given the concerns with metal-on-metal bearings, and the recall or withdrawal of certain devices, it is appropriate to review our results using a resurfacing device with a relatively good clinical record. As our experience and understanding of these bearings grew, we now describe changes to our preferred component position, and have used additional imaging to narrow our indications for this procedure, … Read the rest