Dissociation of mobile-bearing patellar component in low contact stress patellofemoral arthroplasty, its mechanism and management: two case reports.

Autor: van Jonbergen HP; Department of Orthopaedic Surgery, Deventer Hospital Nico Bolkesteinlaan 75, 7416 SE Deventer The Netherlands. vanjonbergen@dz.nl, Werkman DM, Barnaart AF
Jazyk: angličtina
Zdroj: Cases journal [Cases J] 2009 May 26; Vol. 2, pp. 7502. Date of Electronic Publication: 2009 May 26.
DOI: 10.1186/1757-1626-2-7502
Abstrakt: Introduction: Isolated patellofemoral osteoarthritis can be treated with patellofemoral arthroplasty.
Case Presentation: We present two cases of isolated patellofemoral osteoarthritis treated with Low Contact Stress patellofemoral arthroplasty; in both cases the polyethylene mobile-bearing of the patellar component dissociated from the metal backing. One patient had a revision to a Richards patellofemoral prosthesis, and in the second patient the arthroplasty was converted to a total knee prosthesis because of clinically important femorotibial osteoarthritis.
Conclusion: The possible failure mechanisms are described. We suggest avoiding the use of a metal-backed mobile-bearing patellar component due to the risk of dissociation.
Databáze: MEDLINE
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