Our 20‑year implant survivorship of 97.6% with the M2a‑38 bearing surpassed registry benchmarksfor THA. This large‑bearing (38 mm), full hemisphere coverage metal‑on‑metal system had no bearing wear failures,one failure of instability, one failure of fixation, and three trunnion failures, perhaps suggesting an optimum balancebetween stability of the joint and the trunnion. Jones, C.S., Gaillard-Campbell, D. & Gross, T.P. Long-term clinical outcomes of the Biomet M2a-38: a retrospective review of 335 total hip arthroplasty cases. J Orthop Surg Res 18, 721 (2023). https://doi.org/10.1186/s13018-023-04223-4
The primary advantages of hip resurfacing are stability, functionality, durability, and bone preservation. Over the past 15 years, technology has changed dramatically allowing surgeons to perform hip resurfacing with minimal blood loss and good pain control.

Advances in Orthopedics; 2019

We investigate the efficacy of a modified acetabular bone-preparation technique in reducing the incidence of two clinical problems (lack of bone ingrowth and cup shift) identified in hip resurfacing arthroplasty.

Tech Orthop. 2010.

A prospective analysis has demonstrated improved clinical results and no increased compli- cations when employing MIS techniques for HRA using a posterior approach. Key

Acta Orthop Belg. 2012.

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).

The Journal of Arthroplasty. 2016

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.

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. 2012

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.

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