title: Proprioception following total knee arthroplasty with and without the posterior cruciate ligament.
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.
authors.affiliation: Department of Orthopaedic Surgery, Tulane University School of Medicine, New Orleans, Louisiana 70112, USA.
authors.forename: S
authors.initials: S
authors.lastname: Simmons
authors.forename: S
authors.initials: S
authors.lastname: Lephart
authors.forename: H
authors.initials: H
authors.lastname: Rubash
authors.forename: P
authors.initials: P
authors.lastname: Borsa
authors.forename: R L
authors.initials: RL
authors.lastname: Barrack
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001168:Arthritis / Q000503:physiopathology / Q000601:surgery; D004056:Differential Threshold; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D009039:Motion Perception / Q000502:physiology; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D011434:Proprioception / Q000502:physiology*