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The Experts below are selected from a list of 327 Experts worldwide ranked by ideXlab platform
A Martin – 1st expert on this subject based on the ideXlab platform
implication of femoral stem on performance of Articular Surface replacement asr xl total hip arthroplastyJournal of Arthroplasty, 2014Co-Authors: Archibald Von Strempel, Christian Bach, Matthias Luegmair, Thomas Benesch, A MartinAbstract:
Abstract Taper junctions of large diameter metal-on-metal femoral heads and femoral stems were described as metal ion generator due to accelerated wear and corrosion. However, literature about the Articular Surface Replacement (ASR) total hip arthroplasty (THA) invariably deals with stems manufactured by DePuy Orthopedics (Warsaw, IN, USA). Nothing is known whether different stems with common 12/14 mm tapers affect failure rate or ion release. 99 ASR THA (88 patients) implanted with CoxaFit or ARGE Geradschaft stems (K-Implant, Hannover, Germany) were retrospectively analyzed. After a mean follow-up of 3.5 years revision rate was 24.5%, mostly due to adverse reaction to metal debris (ARMD). CT scan revealed component loosening in 10.3% and pseudotumoral lesions in 12.6%. Elevated ion concentrations (> 7 μg/l) were found in 38.6%.
Matthew C Nadaud – 2nd expert on this subject based on the ideXlab platform
early failure of Articular Surface replacement xl total hip arthroplastyJournal of Arthroplasty, 2011Co-Authors: Garen D Steele, Thomas K. Fehring, Susan M Odum, Anne C Dennos, Matthew C NadaudAbstract:
The ASR (Articular Surface replacement) XL (DePuy, Warsaw, Ind) metal-on-metal hip arthroplasty offers the advantage of stability and increased motion. However, an alarming number of early failures prompted the evaluation of patients treated with this system. A prospective study of patients who underwent arthroplasty with the ASR XL system was performed. Patients with 2-year follow-up or any revision were included. Failure rates, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, and radiographs were evaluated. Ninety-five patients (105 hips) were included. There were 16 revisions. Thirteen (12%) were aseptic acetabular failures. Eight were revised for aseptic loosening; 4, for metallosis; 1, for malposition; 2, for infection; and 1, for periprosthetic fracture. Mean time to revision was 1.6 years (0.18-3.4 years). The ASR XL with a revision rate of 12% is the second reported 1 piece metal-on-metal system with a significant failure rate at early follow-up. This pArticular class of implants has inherent design flaws that lead to early failure.
Ian K Y Lo – 3rd expert on this subject based on the ideXlab platform
arthroscopic repair of Articular Surface partial thickness rotator cuff tears transtendon technique versus repair after completion of the tear a meta analysisAdvances in orthopedics, 2016Co-Authors: Jarret M Woodmass, Aaron J Bois, Richard S Boorman, Gail M Thornton, Ian K Y LoAbstract:
Articular Surface partial-thickness rotator cuff tears (PTRCTs) are commonly repaired using two different surgical techniques: transtendon repair or repair after completion of the tear. Although a number of studies have demonstrated excellent clinical outcomes, it is unclear which technique may provide superior clinical outcomes and tendon healing. The purpose was to evaluate and compare the clinical outcomes following arthroscopic repair of Articular Surface PTRCT using a transtendon technique or completion of the tear. A systematic review of the literature was performed following PRISMA guidelines and checklist. The objective outcome measures evaluated in this study were the Constant Score, American Shoulder and Elbow Surgeons score, Visual Analogue Scale, physical examination, and complications. Three studies met our criteria. All were prospective randomized comparative studies with level II evidence and published from 2012 to 2013. A total of 182 shoulders (mean age 53.7 years; mean follow-up 40.5 months) were analyzed as part of this study. Both procedures provided excellent clinical outcomes with no significant difference in Constant Score and other measures between the procedures. Both procedures demonstrated improved clinical outcomes. However, there were no significant differences between each technique. Further studies are required to determine the long-term outcome of each technique.
transtendon arthroscopic repair of partial thickness Articular Surface tears of the rotator cuffArthroscopy, 2004Co-Authors: Ian K Y Lo, Stephen S BurkhartAbstract:
Partial tears of the Articular Surface of the rotator cuff are common lesions and when not repaired can lead to persistent pain and disability. In this report, we describe a transtendon method of repairing partial Articular Surface lesions that anatomically restores the footprint of the rotator cuff, allowing a broad area for tendon healing to bone.