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Dislocation of posterior-stabilized mobile-bearing knee prosthesis. A case report.
- Source :
-
The Knee [Knee] 2006 Dec; Vol. 13 (6), pp. 478-82. Date of Electronic Publication: 2006 Sep 07. - Publication Year :
- 2006
-
Abstract
- Spin-out of mobile-bearing knees is a significant early complication of mobile-bearing total knee arthroplasty. Dislocation of the cam-post mechanism of fixed-bearing posterior-stabilized knees occurs more rarely. We have observed an unusual case of dislocation of posterior-stabilized rotating-platform total knee arthroplasty, which has both a cam-post mechanism and rotating platform. A 65-year-old man with knee osteoarthritis and cervical spondylotic myelopathy underwent total knee arthroplasty using a mobile-bearing prosthesis. The dislocation, which occurred 4 days postoperatively, could not be reduced by closed manipulation. However, spontaneous reduction occurred 6 days after the dislocation, which did not recur. A gap mismatch or trapezoidal-shaped gaps may lead to dislocation or spin-out of the bearing insert. This case illustrates that dislocation of a posterior-stabilized mobile-bearing total knee arthroplasty can occur, and both quadriceps deficiency and ligament laxity may contribute to the risk of dislocation.
Details
- Language :
- English
- ISSN :
- 0968-0160
- Volume :
- 13
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- The Knee
- Publication Type :
- Academic Journal
- Accession number :
- 16956764
- Full Text :
- https://doi.org/10.1016/j.knee.2006.07.002