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In vivo deep-flexion kinematics in patients with posterior-cruciate retaining and anterior-cruciate substituting total knee arthroplasty. 2010

Y Mikashima, and T Tomatsu, and M Horikoshi, and T Nakatani, and S Saito, and S Momohara, and S A Banks
Institute of Rheumatology, Tokyo Women's Medical University, Tokyo, Japan.

BACKGROUND Posterior-cruciate ligament retaining total knee arthroplasty designs have long been used with excellent clinical success, but often have shown kinematics and flexion performance that are significantly different from the natural knee. The purpose of this study was to compare deep-flexion knee kinematics in patients with two types of posterior-cruciate ligament retaining total knee arthroplasty. METHODS One group received a traditional curved symmetric articular configuration, and one group received a design incorporating a lateral compartment which constrains the lateral condyle to the antero-posterior center of the tibial plateau in extension, but allows translation in flexion--roughly approximating the role of the anterior cruciate ligament. In vivo kinematics were analyzed using three-dimensional model registration and plain radiographs of kneeling and squatting activities in 20 knees in 18 patients. RESULTS Knees with the anterior cruciate ligament substituting design exhibited greater flexion, femoral antero-posterior translation and tibial internal rotation. CONCLUSIONS Geometric features intended to improve knee flexion, including greater antero-posterior stability, a more posterior tibial sulcus, and reshaped femoral condyles, do provide measurable and significant differences in deep-flexion knee kinematics.

UI MeSH Term Description Entries
D007719 Knee Joint A synovial hinge connection formed between the bones of the FEMUR; TIBIA; and PATELLA. Superior Tibiofibular Joint,Joint, Knee,Joint, Superior Tibiofibular,Knee Joints,Superior Tibiofibular Joints,Tibiofibular Joint, Superior
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016059 Range of Motion, Articular The distance and direction to which a bone joint can be extended. Range of motion is a function of the condition of the joints, muscles, and connective tissues involved. Joint flexibility can be improved through appropriate MUSCLE STRETCHING EXERCISES. Passive Range of Motion,Joint Flexibility,Joint Range of Motion,Range of Motion,Flexibility, Joint
D016118 Anterior Cruciate Ligament A strong ligament of the knee that originates from the posteromedial portion of the lateral condyle of the femur, passes anteriorly and inferiorly between the condyles, and attaches to the depression in front of the intercondylar eminence of the tibia. Cruciate Ligament, Anterior,Anterior Cranial Cruciate Ligament,Cranial Cruciate Ligament,Anterior Cruciate Ligaments,Cranial Cruciate Ligaments,Cruciate Ligament, Cranial,Cruciate Ligaments, Anterior,Cruciate Ligaments, Cranial,Ligament, Anterior Cruciate,Ligament, Cranial Cruciate,Ligaments, Anterior Cruciate,Ligaments, Cranial Cruciate
D016119 Posterior Cruciate Ligament A strong ligament of the knee that originates from the anterolateral surface of the medial condyle of the femur, passes posteriorly and inferiorly between the condyles, and attaches to the posterior intercondylar area of the tibia. Cruciate Ligament, Posterior,Cruciate Ligaments, Posterior,Ligament, Posterior Cruciate,Ligaments, Posterior Cruciate,Posterior Cruciate Ligaments
D016896 Treatment Outcome Evaluation undertaken to assess the results or consequences of management and procedures used in combating disease in order to determine the efficacy, effectiveness, safety, and practicability of these interventions in individual cases or series. Rehabilitation Outcome,Treatment Effectiveness,Clinical Effectiveness,Clinical Efficacy,Patient-Relevant Outcome,Treatment Efficacy,Effectiveness, Clinical,Effectiveness, Treatment,Efficacy, Clinical,Efficacy, Treatment,Outcome, Patient-Relevant,Outcome, Rehabilitation,Outcome, Treatment,Outcomes, Patient-Relevant,Patient Relevant Outcome,Patient-Relevant Outcomes
D019645 Arthroplasty, Replacement, Knee Replacement of the knee joint. Knee Replacement, Total,Arthroplasties, Knee Replacement,Arthroplasties, Replacement, Knee,Arthroplasty, Knee Replacement,Arthroplasty, Replacement, Partial Knee,Knee Arthroplasty,Knee Arthroplasty, Total,Knee Replacement Arthroplasties,Knee Replacement Arthroplasty,Partial Knee Arthroplasty,Partial Knee Replacement,Replacement Arthroplasties, Knee,Replacement Arthroplasty, Knee,Replacement, Total Knee,Total Knee Replacement,Unicompartmental Knee Arthroplasty,Unicompartmental Knee Replacement,Unicondylar Knee Arthroplasty,Unicondylar Knee Replacement,Arthroplasty, Knee,Arthroplasty, Partial Knee,Arthroplasty, Total Knee,Arthroplasty, Unicompartmental Knee,Arthroplasty, Unicondylar Knee,Knee Arthroplasty, Partial,Knee Arthroplasty, Unicompartmental,Knee Arthroplasty, Unicondylar,Knee Replacement, Partial,Knee Replacement, Unicompartmental,Knee Replacement, Unicondylar,Total Knee Arthroplasty

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