Dislocation of the polyethylene inlay due to anterior tibial slope in revision total knee arthroplasty.
case_report · Level V
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- Record sourced from PubMed, PMID 11685361.
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Abstract
We report a case of dislocation of the polyethylene inlay in revision total knee arthroplasty. Eight days after revision arthroplasty due to a previous infection, the polyethylene inlay of a PCL- retaining cemented total knee arthroplasty dislocated at about 80 degrees of flexion on the CPM machine. Lateral X-ray examination revealed an anterior slope of the tibial cut of 5 degrees. Correction of the tibial slope to a posterior tibial slope of 7 degrees reduced the forces on the posterior aspect of the inlay and no redislocation occurred. The mechanisms causing tibial inlays to dislocate in TKA are analyzed and discussed.
Medical subject headings
- Arthroplasty, Replacement, Knee
- Knee Prosthesis
- Prosthesis Failure
- Tibia
Anatomy
- knee
- tibia