• METAL-ON-METAL RESURFACING WITH AN UNCEMENTED FEMORAL COMPONENT.

  A seven-year follow-up study, J Bone Joint Surg Am 2008; 90 Suppl 3:32-7.

  Metal-on-metal hip resurfacing with hybrid fixation has been introduced as an alternative to standard total hip arthroplasty, especially for young and active patients. There are few studies in the literature on the midterm results of cementless femoral side resurfacing. The purpose of this study was to present our seven-year clinical results of a series of twenty cementless metal-on-metal hip resurfacing procedures.

• MINIMALLY INVASIVE POSTERIOR APPROACH FOR HIP RESURFACING ARTHROPLASTY

  Techniques in Orthopaedics 2010; 25 issue 1: pp39-49.

  With the improvement of metal-on-metal bearings, hip resurfacing has become a viable option for hip arthroplasty in young patients. It is technically more complicated to gain access to the acetabulum while preserving the femoral head. In some countries, this type of bone-preserving hip arthroplasty is used in a substantial percentage of young patients.

• INTRAOPERATIVE RADIOGRAPHS FOR PLACING ACETABULAR COMPONENTS IN HIP RESURFACING ARTHROPLASTY

  Clin Orthop Relat Res. 2011 Jun;469(6):1554-9.

  Various clinical and biomechanical studies suggest certain acetabular positions may be associated with higher wear and failure rates in modern metal-on-metal hip resurfacing arthroplasties. However, there are no widely available, reliable, and cost-effective surgical techniques that ensure surgeons are able to place an acetabular component within the safe range of inclination angles after hip resurfacing surgeries.

• IS RESURFACING ARTHROPLASTY APPROPRIATE FOR POSTTRAUMATIC OSTEOARTHRITIS?

  Clin Orthop Relat Res. 2011 Jun;469(6):1567-73.

  High survival has been reported for resurfacing arthroplasty in patients with femoral deformities. Also, hardware removal may not always be necessary with resurfacing arthroplasty and may eliminate some of the difficulties performing total hip arthroplasty (THA) in patients with posttraumatic osteoarthritis

• HIP RESURFACING IN PATIENTS WHO HAVE OSTEONECROSIS AND ARE 25 YEARS OR UNDER

  Clin Orthop Relat Res. 2011 Jun;469(6):1582-8.

  Young patients with osteonecrosis (ON) treated with THA often have suboptimal function and radiographic failure with eventual revision. Resurfacing may be an option because of potentially increased functionality and decreased radiographic failure, although neither has been confirmed in the literature.

• COMPARISON OF UNILATERAL AND RAPIDLY STAGED BILATERAL HIP RESURFACING ARTHROPLASTY

  Acta Orthop Belg. 2011 Apr;77(2):203-10.

  The purpose of this study was to compare the clinical results and complication rates after unilateral vs. staged bilateral metal-on-metal hip resurfacing arthroplasty (HRA) when using a comprehensive blood management program, to determine if there was increased risk for staged HRAs.

• COMPARISON OF FULLY POROUS-COATED AND HYBRID HIP RESURFACING

  A minimum two-year follow-up study, Orthopedic Clinics of North America.2011 Apr;42(2):231-9.

  The purpose of this study was to compare clinical and radiological outcomes of the first 191 fully porous-coated hip resurfacing arthroplasties with 96 hybrid hip resurfacing arthroplasties performed during the same period at a minimum 2-year follow-up to evaluate the initial fixation of uncemented femoral resurfacing components.

• THE FIRST 100 FULLY POROUS-COATED FEMORAL COMPONENTS IN HIP RESURFACING

  Bull NYU Hosp Jt Dis 2011 Volume 69 (S1) - August 2011.

  Uncemented fixation of implants to bone is a proven technology in traditional hip arthroplasty surgery. However, cement fixation is currently the standard method for the femoral component in hip resurfacing.

• PREVALENCE OF DYSPLASIA AS THE SOURCE OF WORSE OUTCOME IN YOUNG FEMALE PATIENTS AFTER HIP RESURFACING ARTHROPLASTY

  International Orthopaedics: Volume 36, Issue 1 (2012), Page 27-34.

  Smaller femoral component size has been implicated as underlying the risk factor that explains the higher failure rate in women who have a hip resurfacing arthroplasty (HRA). We suspect that the diagnosis of dysplasia may be a more important causative risk factor than either small component size or female gender.

• CLINICAL OUTCOME OF THE METAL-ON-METAL HYBRID CORIN CORMET 2000 HIP RESURFACING SYSTEM

  AN UP TO 11-YEAR FOLLOW-UP STUDY J Arthroplasty. 2011 Sep 9. [Epub ahead of print].

  This report extends the follow-up for the largest center of the first multicenter US Food and Drug Administration investigational device exemption study on metal-on-metal hip resurfacing arthroplasty up to 11 years. A single surgeon performed 373 hip resurfacing arthroplasties using the hybrid Corin Cormet 2000 system.

• RISK FACTOR ANALYSIS FOR EARLY FEMORAL FAILURE IN METAL-ON-METAL HIP RESURFACING ARTHROPLASTY

  THE EFFECT OF BONE DENSITY AND BODY MASS INDEX J Orthop Surg Res. 2012 Jan 10;7(1):1.

  The importance of appropriately selecting patients based on factors such as bone mineral density, body mass index, age, gender, and femoral component size has been demonstrated in many studies as an aid in decreasing the rate of revisions and improving the outcomes for patients after hip resurfacing arthroplasty (HRA).

• IS THERE ADDED RISK IN RESURFACING A FEMORAL HEAD WITH CYSTS?

  Journal of Orthopaedic Surgery and Research. 2011 Oct 17;6:55.

  Femoral head cysts have been identified as a risk factor for early femoral failures after metal-on-metal hip resurfacing arthroplasty (HRA) based on limited scientific data. However, we routinely performed HRA if less than 1/3 of the femoral head appeared destroyed by cysts on the preoperative radiograph.

• HIP RESURFACING WITH THE BIOMET HYBRID RECAP-MAGNUM SYSTEM

  7-YEAR RESULTS J Arthroplasty. 2012 May. [Epub ahead of print].

  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.

• TOTAL KNEE ARTHROPLASTY WITH FULLY POROUS COATED STEMS IN THE TREATMENT OF LARGE BONE DEFECT

  J Arthroplasty. April,2013.

  Between February1999 and April 2006, 25 patients (28 knees) underwent a TKA by a single surgeon. At an average final follow-up of 7±2years (range, 3-10years), 34 (100%) of 34 fully porous stems had achieved bone ingrowth. However, one case (3%) had a component loosening due to the de-bonding of sheets of beads from the stem.

• A SAFE ZONE FOR ACETABULAR COMPONENT POSITION IN METAL-ON-METAL HIP RESURFACING ARTHROPLASTY

  WINNER OF THE 2012 HAP PAUL AWARD J Arthroplasty. Mar 2013.

  A safe zone for acetabular component positioning in hip resurfacing (RAIL: Relative Acetabular Inclination Limit) was calculated based on implant size and acetabular inclination angle (AIA). For AIA below the RAIL, there were no adverse wear failures or dislocations, and only 1% of caseswith ion levels above 10 μg/L. Other than high inclination angle and small bearing size, female gender was the only other factor that correlated with high ion levels in the multivariate analysis.

• COMPARATIVE STUDY BETWEEN PATIENTS WITH OSTEONECROSIS AND OSTEOARTHRITIS AFTER HIP RESURFACING ARTHROPLASTY

  Acta Orthop Belg. 2012 Dec; 78(6): 735-44.

  The purpose of this study was to compare the clinical outcomes of osteonecrosis (ON) and osteoarthritis (OA) patients after metal-on-metal hip resurfacing arthroplasty (HRA). We retrospectively reviewed our database and identified a study group of 122 HRA cases with the primary diagnosis of ON. A control group of 122 OA cases were randomly selected by a computer program to match the surgical date, gender and the femoral component type and size with the study group.

• CURRENT STATUS OF MODERN FULLY POROUS COATED METAL-ON-METAL HIP RESURFACING ARTHROPLASTY

  Arthroplasty. J Arthroplasty. 2013 May 13. pii: S0883-5403(13)

  Between March 2007 and July 2010, 1000 consecutive fully porous coated hip resurfacing arthroplasties (HRA) were performed by a single surgeon in 871 patients. The average length of follow-up was 3 ± 1 years. Three cases (0.3%) in three patients showed adverse wear related failures. Another 17 (1.7%) failures were identified at the time of this study. Using any failure of any component as the endpoint, the survivorship rate was 98.8% at two years and 97.4% at five years.

• INCIDENCE OF ADVERSE WEAR REACTIONS IN HIP RESURFACING ARTHROPLASTY

  A single surgeon series of 2,600 cases. Hip International. 2013 May-Jun; 23(3): 250-8.

  A single surgeon performed 2,559 metal-on-metal hip resurfacing arthroplasties in 
2,109 patients. The Corin Cormet 2000 (393 cases) and Biomet Recap implants (2,166 cases) were used in our series. In this study, the adverse wear failure (AWF) rate was 0.27%. At 10 years postoperatively, our Kaplan-Meier cumulative revision rate for AWF was 1% for all patients, 0.2% for men, 2.6% for women, and 9% for patients with a diagnosis of dysplasia.

• REDUCING THE RISK OF EARLY FEMORAL FAILURE AFTER METAL-ON-METAL HIP RESURFACING ARTHROPLASTY

  European Orthopaedics and Traumatology Accepted.

   

• OUTCOMES AFTER REVISION OF METAL-ON-METAL HIP RESURFACING ARTHROPLASTY

  J Arthroplasty, Accepted.

  We report the results of 58 hip resurfacing arthroplasties (HRA) revised by a single surgeon with an average of 5.2±2.6 years follow-up. The four most common causes for revision were acetabular component loosening, femoral neck fracture，femoral component loosening, and adverse wear related failure (AWRF). In 95% of cases (55/58), the revision bearing was a large metal-on-metal type including in all seven AWRF cases; three cases were revised to ceramic-onpolyethylene. There were two repeat revisions due to acetabular component loosening.

Abstracts

• MY THREE TIPS TO START HSR

  Abstract for the Third Annual US Comprehensive Course on Total Hip Resurfacing Arthroplasty in Baltimore, MD, September 2009: SESSION 7: TIPS TO GET STARTED by Thomas P. Gross, M.D.

• IN FAVOR OF A CEMENTLESS FEMORAL COMPONENT

  This lecture reviews the advantages and disadvantages of cement vs. cementless (porous) fixation in general and speculates why cement fixation was initially chosen on the femoral side of hip resurfacing. The possible advantages of uncemented fixation are discussed.

• MINIMALLY INVASIVE POSTERIOR

  Traditionally, a larger more extensive approach has been required for hip surface replacement (HSR) than for standard stemmed total hip replacement. As we have gained experience with HSR, a minimally invasive surgical technique (MIS) using the posterior approach has been developed.

• THE UNCEMENTED FEMORAL COMPONENT IN HIP SURFACE REPLACEMENT

  This lecture reviews the 15 year history of modern metal-metal hip surface replacement as it relates to uncemented femoral components. The results of McMinn, Wagner, Villar, Spriggins and Griffin, Fern are reviewed. The specific types of implants used are highlighted.