In knee arthroplasty, which design preserves the posterior cruciate ligament?

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Multiple Choice

In knee arthroplasty, which design preserves the posterior cruciate ligament?

Explanation:
Preserving the posterior cruciate ligament is achieved with a cruciate-retaining knee implant. In this design, the PCL is kept intact so it can continue to guide knee motion and help control posterior movement of the tibia, maintaining more natural knee kinematics. This contrasts with posterior-stabilized designs, which remove the PCL and rely on a post-and-cam mechanism for stability. The other ligaments listed aren’t the feature that defines this preservation approach.

Preserving the posterior cruciate ligament is achieved with a cruciate-retaining knee implant. In this design, the PCL is kept intact so it can continue to guide knee motion and help control posterior movement of the tibia, maintaining more natural knee kinematics. This contrasts with posterior-stabilized designs, which remove the PCL and rely on a post-and-cam mechanism for stability. The other ligaments listed aren’t the feature that defines this preservation approach.

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