Oxford phase III meniscal bearing fracture: case report.

Meniscal bearing fracture is a rare complication of phase III Oxford unicompartmental knee replacement (UKR). We report a case of a meniscal bearing fracture that occurred 7 years after phase III Oxford medial UKR. The meniscal bearing showed uneven delamination of the polyethylene in the thinnest articular surface and an impingement lesion. This lesion initiated a fatigue crack that propagated to cause failure of the meniscal bearing. This is the first report of a meniscal bearing fracture without a posterior marker wire.

[1]  A. Price,et al.  A Second Decade Lifetable Survival Analysis of the Oxford Unicompartmental Knee Arthroplasty , 2011, Clinical orthopaedics and related research.

[2]  D W Murray,et al.  Wear of congruent meniscal bearings in unicompartmental knee arthroplasty: a retrieval study of 16 specimens. , 1998, The Journal of bone and joint surgery. British volume.

[3]  D W Murray,et al.  Examination of ten fractured Oxford unicompartmental knee bearings. , 2011, The Journal of bone and joint surgery. British volume.

[4]  D R Broome,et al.  A knee simulating machine for performance evaluation of total knee replacements. , 1997, Journal of biomechanics.

[5]  H. Gill,et al.  Minimally invasive Oxford phase 3 unicompartmental knee replacement: results of 1000 cases. , 2011, The Journal of bone and joint surgery. British volume.

[6]  E R Valstar,et al.  Polyethylene wear of mobile-bearing unicompartmental knee replacement at 20 years. , 2011, The Journal of bone and joint surgery. British volume.

[7]  David W. Murray,et al.  Wear of congruent meniscal bearings in unicompartmental knee arthroplasty: A RETRIEVAL STUDY OF 16 SPECIMENS , 1998 .

[8]  D W Murray,et al.  Ten-year in vivo wear measurement of a fully congruent mobile bearing unicompartmental knee arthroplasty. , 2005, The Journal of bone and joint surgery. British volume.

[9]  J. Bae,et al.  Oxford phase 3 unicompartmental knee replacement in Korean patients. , 2012, The Journal of bone and joint surgery. British volume.

[10]  D W Murray,et al.  Polyethylene wear in Oxford unicompartmental knee replacement: a retrieval study of 47 bearings. , 2010, The Journal of bone and joint surgery. British volume.