Which of the Following Is True About Total Knee Arthroplasty

question 20

Multiple Choice

Which of the following is true about total knee arthroplasty (TKA) ?

• A)When a cruciate-retaining prosthesis/procedure is used for a TKA, the anterior cruciate ligament (ACL) is not excised, thus providing greater anterior-posterior stability to the knee.
• B)A tricompartmental TKA involves replacing not only the articulating surfaces of the proximal tibia and distal femur but also the tibiofibular articulation.
• C)If a semiconstrained or unconstrained prosthetic implant is used, the medial and lateral collateral ligaments (MCL and LCL) must be intact or repairable for adequate postoperative medial-lateral stability of the replaced joint.
• D)A mobile-bearing prosthesis typically is selected for the elderly, relatively sedentary patient because this design permits full weight bearing immediately.

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