The posterior cruciate ligament in total knee arthroplasty |
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| Authors: | Joel I. Sorger MD Doug Federle MS Patrick G. Kirk MD Edward Grood PhD James Cochran PhD Martin Levy PhD |
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| Affiliation: | aDepartment of Orthopaedic Surgery, University of Cincinnati Medical Center, Cincinnati, Ohio, USA;bUniversity of Cincinnati Noyes-Giannestras Biomechanics Laboratory, Cincinnati, Ohio, USA;cCBA Quality Assurance and Operations Management, University of Cincinnati, Cincinnati, Ohio, USA |
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| Abstract: | The purpose of this study was to answer 2 questions: Does the posterior cruciate ligament (PCL) produce femoral rollback in a single-design, cruciate-sparing total knee arthroplasty (TKA)? Does the PCL prevent posterior tibial displacement when it is retained after a single-design, cruciate-sparing TKA? Knee kinematics and limits of motion were measured with the knees in the following states: (1) intact knee, (2) anterior cruciate-deficient knee, (3) PCL-retaining total knee of a single design (TKA), (4) PCL-retaining TKA with PCL cut, and (5) PCL-substituting TKA. Femoral rollback was then calculated from the above data. The results showed that the PCL was able to prevent posterior translation and maintain femoral rollback when it was preserved during TKA. Therefore, the PCL can be functional after TKA, in a single-design, cruciate-sparing TKA. When the PCL was cut, significant changes in knee kinematics were observed. |
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| Keywords: | posterior cruciate ligament total knee arthroplasty femoral rollback |
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