Tomonori Yagi

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BACKGROUND Several trials have been conducted to compare the clinical results between anatomic double-bundle and single-bundle anterior cruciate ligament (ACL) reconstruction procedures. In these studies, however, the number of patients was insufficient to compare the clinical results of the 2 procedures. HYPOTHESIS The anatomic double-bundle procedure(More)
BACKGROUND The data available from the previously reported clinical studies remains insufficient concerning the hamstring graft preparation in double-bundle anterior cruciate ligament (ACL) reconstruction. OBJECTIVE To test the hypothesis that there are no significant differences between the semitendinosus tendon alone and the semitendinosus and gracilis(More)
The purpose of this study was to clinically and radiologically compare the utility, osteoconductivity, and absorbability of hydroxyapatite (HAp) and beta-tricalcium phosphate (TCP) spacers in medial open-wedge high tibial osteotomy (HTO). Thirty-eight patients underwent medial open-wedge HTO with a locking plate. In the first 19 knees, a HAp spacer was(More)
Eighty-nine knees with medial tibiofemoral and patellofemoral osteoarthritis were treated by high tibial osteotomy between 1972 and 1978, and 71 were followed up for at least 5 years, the average being 6 years and 9 months. There was no significant loss of motion as recorded before and after operation. In most patients pain decreased or disappeared, and(More)
Alterations in the pattern of pulmonary metastasis of patients with osteosarcoma treated with adjuvant chemotherapy were studied. Thirty two patients who were treated with both radical surgery and adjuvant chemotherapy were observed (chemotherapy group). As a control, sixty two patients treated with radical surgery alone were also assessed (non-chemotherapy(More)
The aim of this study was to compare the operation time required and the clinical outcome 2 years postoperatively, after anatomic double-bundle ACL reconstructions using hamstring tendon grafts fixed with either the EndoButton-CL-BTB® (ECL-BTB) or the EndoButton-CL® (ECL). Forty-six patients, who underwent anatomic double-bundle ACL reconstruction, were(More)
BACKGROUND In anatomic double-bundle anterior cruciate ligament (ACL) reconstruction, there are great controversies concerning the ideal graft tension protocols. The purpose of this study was to clarify differences in the effect of two graft tension protocols on the clinical outcome after anatomic double-bundle anterior cruciate ligament (ACL)(More)
BACKGROUND Tunnel enlargement and coalition following double-bundle anterior cruciate ligament (ACL) reconstruction with hamstring tendon autografts has not yet been sufficiently studied. HYPOTHESIS The incidence and the degree of femoral tunnel enlargement will be significantly greater than those for tibial tunnel enlargement after anatomic double-bundle(More)
Thirty cases of human osteosarcoma were transplanted subcutaneously in BALB/c nude mice. Twenty-four tumours survived in animals and showed the histopathology of the original tumours. Growth of transplantable tumours was closely related to the amount of osteoid tissue and tumours with predominant osteoid tissue showed slow growth. Tumours whose(More)
Benign giant cell tumours showed a sharp chromosome number mode at 46 with a superficially normal diploid karyotype. Osteosarcomas, however, were characterised by having aneuploid modal numbers. LDH isozyme patterns of giant cell tumours showed a maximum activity in Fractions IV and V, whereas that of osteosarcomas apparently fell in a range of Fraction(More)