Proprioception following total knee arthroplasty with and without the posterior cruciate ligament |
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| Affiliation: | 1. Carilion Clinic Orthopaedics, Virginia Tech, 2331 Franklin Rd, Roanoke, VA 24014, USA;2. Wilmer Eye Institute, Johns Hopkins University School of Medicine, 600 N. Wolfe St, Baltimore, MD 21287, USA;3. Rothman Institute, Thomas Jefferson University, 925 Chestnut St, Philadelphia, PA 19107, USA;4. Independent Statistical Support, Rochester, NY, USA;5. Department of Orthopaedics and Rehabilitation, University of Texas, 6431 Fannin St, Houston, TX 77030, USA;6. Department of Orthopaedics, Veterans Affairs Medical Center, 1100 Tunnel Rd, Asheville, NC 28805, USA |
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| Abstract: | Proprioception was measured in two groups of patients following successful total knee arthroplasty (TKA). In one group, the posterior cruciate ligament was retained and an unconstrained cruciate-retaining total knee component was used; in the other group, the posterior cruciate ligament was excised and a cruciate-substituting design was implanted. Threshold to detection of passive motion was quantified as a measure of proprioception. The degree of preoperative arthritis was objectively classified according to Resnick and Niwoyama. There was no difference in threshold to detection of passive motion in cruciate-retaining versus cruciate-substituting TKA. In patients with a moderate grade of arthritis before surgery, the postoperative scores were virtually identical. When the grade of preoperative arthritis was severe, patients with cruciate-substituting TKAs performed significantly better than those with cruciate-retaining TKAs. |
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