The Journal of Arthroplasty (2016), doi: 10.1016/j.arth.2016.07.028. Background: The optimal surgical treatment for osteonecrosis of the femoral head has yet to be 20 elucidated. To evaluate the role of femoral fixation techniques in hip resurfacing, we present a 21 comparison of the results for two consecutive groups: Group 1 (75 hips) received hybrid hip 22 resurfacing implants with a cemented femoral component; Group 2 (103 hips) received 23 uncemented femoral components. Both groups received uncemented acetabular components. Conclusions: This study demonstrates a superior outcome for cases of osteonecrosis with 36 uncemented hip resurfacings compared to cases employing hybrid devices.

BMC Musculoskeletal Disorders. 2016. DOI: 10.1186/s12891-016-1095-7 Background: Arthritis secondary to developmental hip dysplasia often mandates implant surgery at a relatively young age. Hip resurfacing arthroplasty (HRA), compared with standard stemmed total hip arthroplasty (THA), affords a more active lifestyle including extreme-motion activities but stimulates concerns pertaining to implant failure. Conclusions: We believe the interventions reported here, combined with sufficient surgeon experience and properly designed implants, afford patients with mild developmental dysplasia a more active lifestyle with favorable implant survival.

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.

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.

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.

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.

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.

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.