Yoshinori Ishii

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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. Fifty-three knees had PCLR and 24 had PCLS prostheses. The selected patients had(More)
In this study, we examined effects of a newly synthesized chemical compound, FR260330, (2E)-3-(4-chlorophenyl)-N-[(1S)-2-oxo-2-{[2-oxo-2-(4-{[6-(trifluoromethyl)-4-pyrimidinyl]oxy}-1-piperidinyl)ethyl]amino}-1-(2-pyridinylmethyl)ethyl]acrylamide on nitric oxide (NO) production in rat splenocytes and human colon cancer cell line, DLD-1 cells. FR260330(More)
A preoperative quantitative evaluation of soft tissues is helpful for planning total knee arthroplasty, in addition to the conventional clinical examinations involved in moving the knee manually. We evaluated preoperative coronal laxity with osteoarthritis in patients undergoing total knee arthroplasty by applying a force of 150 N with an arthrometer. We(More)
The control of perioperative blood loss is a major concern in cementless knee arthroplasty surgery. We randomized retrospectively 55 patients (60 knees in total) who had undergone cementless total knee arthroplasty and determined the efficacy of tourniquet release either "before" (30 knees) or "after" (30 knees) wound closure. Measurements of total blood(More)
This study evaluated the changes in the range of motion (ROM) with time postoperatively. 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 changes in the ROM in(More)
INTRODUCTION This study determined the relationship between the in vivo kinematics and joint laxity of mobile-bearing knees. MATERIALS AND METHODS Ten subjects who were judged clinically successful after a posterior-cruciate-ligament-retaining mobile-bearing total knee arthroplasty were analyzed under dynamic conditions using fluoroscopy, following a(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)
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)
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)
This study analyzed the data from 82 primary total knee arthroplasties performed in 74 patients using the Genesis Total Knee Arthroplasty System. Ten men and 64 women with a mean age of 78 years were evaluated at a mean follow-up of 7 years. Seventy procedures used cemented femoral and tibial components, and 12 used cementless femoral and tibial components.(More)