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INTRODUCTION A stress arthrometry study of 77 knees undergoing total knee arthroplasty was performed to determine the difference in anteroposterior (AP) laxity between posterior cruciate ligament (PCL)-retaining (PCLR) and PCL-substituting (PCLS) prostheses using the Genesis I TKA. MATERIALS AND METHODS Fifty-three knees had PCLR and 24 had PCLS(More)
BACKGROUND Studies of medial and lateral femoral posterior condylar offset have disagreed on whether posterior condylar offset affects maximum knee flexion angle after TKA. QUESTIONS/PURPOSES We asked whether posterior condylar offset was correlated with knee flexion angle 1 year after surgery in (1) a PCL-retaining meniscal-bearing TKA implant, or in (2)(More)
The purpose of this study was to clarify the changes between preoperation and postoperation in each posterior condylar offset (PCO) using computed tomography (CT) and to compare them to conventional radiographic (x-ray) evaluation in total knee arthroplasty. One hundred nine knees in 97 patients were evaluated. The medial PCO was significantly larger before(More)
BACKGROUND Stiffness after a TKA can cause patient dissatisfaction and diminished function, therefore it is important to characterize predictors of ROM after TKA. Studies of AP translation in conscious individuals disagree whether AP translation affects maximum knee flexion angle after implantation of a highly congruent sphere and trough geometry(More)
PURPOSE Anteroposterior (AP) joint translation is an important indicator of good clinical outcome following total knee arthroplasty (TKA). This study evaluated the in vivo relationship between changes in the degree of voluntary soft tissue tension and flexion angle versus simultaneous AP translation after TKA. METHODS A posterior cruciate ligament(More)
The in vivo relationship between the degree of voluntary soft tissue tension and articular conformity after total knee arthroplasty (TKA) and anteroposterior (AP) displacement was simultaneously investigated by analyzing LCS prostheses (posterior cruciate ligament-sacrificing rotating platform design) in 20 knees from 20 patients. AP displacement was(More)
PURPOSE This study evaluated the changes in the range of motion (ROM) with time postoperatively. METHOD The pre- and intraoperative ROM was compared with the ROM 3, 6, 12, and 24 months postoperatively to clarify the effects of posterior cruciate ligament-retaining (PCLR) and posterior cruciate ligament-sacrificing (PCLS) prostheses on the ROM. The(More)
BACKGROUND We treated 12 cases of posterior ankle bony impingement in 12 athletes arthroscopically, and examined the operating methods, findings, and postoperative physical therapy and overall results. MATERIALS AND METHODS The patients' average age was 21.4 years. The mean duration of postoperative followup was 33.8 months. A 2.7-mm, 30 degree(More)
BACKGROUND The purpose of this study was to determine the effect of intraoperative coronal laxity in total knee arthroplasty on the postoperative condition. METHODS We conducted stress arthrometric studies using a Telos arthrometer on 40 knees in 36 patients. Both posterior cruciate ligament-retaining (PCLR) prostheses and posterior cruciate-sacrificing(More)
A stress arthrometric study was done on 60 knees in 54 patients with total knee arthroplasties using a Telos arthrometer, to determine anteroposterior and abduction and adduction laxity and to evaluate the relationship between laxity and retention of the posterior cruciate ligament using low contact stress mobile-bearing prostheses. Thirty knees had(More)