Weight of Polyethylene Wear Particles is Similar in TKAs with Oxidized Zirconium and Cobalt-chrome Prostheses
Open Access
- 1 May 2010
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Clinical Orthopaedics & Related Research
- Vol. 468 (5), 1296-1304
- https://doi.org/10.1007/s11999-009-1179-x
Abstract
The greater lubricity and resistance to scratching of oxidized zirconium femoral components are expected to result in less polyethylene wear than cobalt-chrome femoral components. We examined polyethylene wear particles in synovial fluid and compared the weight, size (equivalent circle diameter), and shape (aspect ratio) of polyethylene wear particles in knees with an oxidized zirconium femoral component with those in knees with a cobalt-chrome femoral component. One hundred patients received an oxidized zirconium femoral component in one knee and a cobalt-chrome femoral component in the other. There were 73 women and 27 men with a mean age of 55.6 years (range, 44–60 years). The minimum followup was 5 years (mean, 5.5 years; range, 5–6 years). Polyethylene wear particles were analyzed using thermogravimetric methods and scanning electron microscopy. The weight of polyethylene wear particles produced at the bearing surface was 0.0223 ± 0.0054 g in 1 g synovial fluid in patients with an oxidized zirconium femoral component and 0.0228 ± 0.0062 g in patients with a cobalt-chrome femoral component. Size and shape of polyethylene wear particles were 0.59 ± 0.05 μm and 1.21 ± 0.24, respectively, in the patients with an oxidized zirconium femoral component and 0.52 ± 0.03 μm and 1.27 ± 0.31, respectively, in the patients with a cobalt-chrome femoral component. Knee Society knee and function scores, radiographic results, and complication rate were similar between the knees with an oxidized zirconium and cobalt-chrome femoral component. The weight, size, and shape of polyethylene wear particles were similar in the knees with an oxidized zirconium and a cobalt-chrome femoral component. We found the theoretical advantages of this surface did not provide the actual advantage. Level I, therapeutic study. See the guidelines for Authors for a complete description of levels of evidence.Keywords
This publication has 40 references indexed in Scilit:
- The Use of a Ceramic Surfaced Oxidized Zirconium Implant in Total Knee ReplacementTechniques in Knee Surgery, 2007
- Revision Total Hip ArthroplastyClinical Orthopaedics & Related Research, 2006
- Characteristics of polyethylene wear particles isolated from synovial fluid after mobile‐bearing and posterior‐stabilized total knee arthroplastiesJournal of Biomedical Materials Research Part B: Applied Biomaterials, 2004
- An Oxidized Zr Ceramic Surfaced Femoral Component for Total Knee ArthroplastyClinical Orthopaedics & Related Research, 2003
- Polyethylene Wear Particles in Synovial Fluid After Total Knee ArthroplastyClinical Orthopaedics & Related Research, 2003
- Why Are Total Knee Arthroplasties Failing Today?Clinical Orthopaedics and Related Research, 2002
- Total Condylar Knee ReplacementPublished by Ovid Technologies (Wolters Kluwer Health) ,2001
- Number of Polyethylene Particles and Osteolysis in Total Joing Replacements: A Quanatitive Study Using a Tissue-Digestion MethodThe Journal of Bone and Joint Surgery, 1997
- Bone formation and bone resorption in failed total joint arthroplasties: Histomorphometric analysis with histochemical and immunohistochemical techniqueJournal of Orthopaedic Research, 1996
- The Knee Society Total Knee Arthroplasty Roentgenographic Evaluation and Scoring SystemClinical Orthopaedics and Related Research, 1989