Your browser doesn't support javascript.
loading
Reasons for Revision, Oxidation, and Damage Mechanisms of Retrieved Vitamin E-Stabilized Highly Crosslinked Polyethylene in Total Knee Arthroplasty.
Spece, Hannah; Schachtner, Jaclyn T; MacDonald, Daniel W; Klein, Gregg R; Mont, Michael A; Lee, Gwo-Chin; Kurtz, Steven M.
Afiliação
  • Spece H; Implant Research Center, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA.
  • Schachtner JT; Biomedical Engineering Practice, Exponent Inc, Menlo Park, CA.
  • MacDonald DW; Implant Research Center, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA.
  • Klein GR; Department of Orthopaedic Surgery, Hartzband Center for Hip and Knee Replacement, Paramus, NJ.
  • Mont MA; Department of Orthopaedic Surgery, The Cleveland Clinic, Cleveland, OH.
  • Lee GC; Department of Orthopaedic Surgery, Penn Presbyterian Medical Center, University of Pennsylvania, Philadelphia, PA.
  • Kurtz SM; Implant Research Center, School of Biomedical Engineering, Science and Health Systems, Drexel University, Philadelphia, PA; Biomedical Engineering Practice, Exponent Inc, Menlo Park, CA.
J Arthroplasty ; 34(12): 3088-3093, 2019 Dec.
Article em En | MEDLINE | ID: mdl-31416742
BACKGROUND: In order to improve oxidation resistance, antioxidants such as vitamin-E are added to polyethylene used in the bearing surfaces of orthopedic components. Currently, little is known about the efficacy of this treatment in vivo. This study therefore reports on the reasons for revision, surface damage mechanisms, and oxidation of retrieved vitamin E-stabilized highly crosslinked polyethylene (HXLPE) for total knee arthroplasty. METHODS: We examined 103 retrieved knee inserts fabricated from vitamin E (VE)-stabilized HXLPE and 67 fabricated from remelted HXLPE as a control. The implantation times were 1.2 ± 1.3 and 1.5 ± 1.3 years for the VE and control cohorts, respectively. The inserts were evaluated for 7 surface damage mechanisms using a semiquantitative scoring method and analyzed for oxidation using Fourier-transform infrared spectroscopy. Reasons for revision were also assessed using operative notes created at time of retrieval. RESULTS: Both groups were revised primarily for instability, infection, and loosening. Burnishing, pitting, and scratching were the most common damage mechanisms observed, with the VE cohort demonstrating less surface damage than the control. Measured oxidation for the cohort was low, with a median oxidation index of 0.09 ± .05 for the articulating surface, 0.05 ± 0.06 for the backside, 0.08 ± 0.06 for the anterior/posterior surfaces, and 0.08 ± 0.05 for the stabilizing post. As compared to the control cohort, oxidation tended to be less for the VE group at the articulating (P < .001) and backside (P = .003) surfaces, although the median differences were minimal and may not be clinically significant. CONCLUSION: The results indicate positive fatigue damage resistance and oxidation resistance for the retrieved VE-stabilized total knee arthroplasty inserts.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Vitamina E / Falha de Prótese / Polietileno / Prótese do Joelho / Antioxidantes Limite: Aged / Female / Humans / Male / Middle aged Idioma: En Revista: J Arthroplasty Assunto da revista: ORTOPEDIA Ano de publicação: 2019 Tipo de documento: Article País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Vitamina E / Falha de Prótese / Polietileno / Prótese do Joelho / Antioxidantes Limite: Aged / Female / Humans / Male / Middle aged Idioma: En Revista: J Arthroplasty Assunto da revista: ORTOPEDIA Ano de publicação: 2019 Tipo de documento: Article País de publicação: Estados Unidos