Zobrazeno 1 - 10
of 49
pro vyhledávání: '"HIROMU SHOJI"'
Autor:
Riichiro Tsukamoto, Kengo Yamamoto, Ian C. Clarke, Masao Akagi, Giuseppe Pezzotti, Hiromu Shoji, Paul Allen Williams
Publikováno v:
Journal of Biomedical Materials Research Part B: Applied Biomaterials. :145-153
Background: Zirconia (ZrO2) ceramics combined with highly cross-linked polyethylene appears to be a promising approach to minimize wear in artificial knee joints. The wear performance of yttria-stabilized zirconia (YZr) femoral condyles on 7-Mrad tib
Autor:
Hiromu Shoji, Ian C. Clarke, Riichro Tsukamoto, Giuseppe Pezzotti, Takashi Nakamura, M. Ogino, Taiyo Asano
Publikováno v:
Key Engineering Materials. :1285-1288
We studied the long-term wear behaviour of alumina-doped zirconia femoral condyles against ultra-high molecular weight polyethylene (UHMWPE) tibial inserts. The simulator kinematics included 20 degrees of flexion/extension, ± 5 degrees of internal/e
Autor:
Mikio Ogino, Ian C. Clarke, Riichiro Tsukamoto, Hiromu Shoji, Takashi Nakamura, Taiyo Asano, Sam Chen
Publikováno v:
Acta Orthopaedica. 77:505-511
Suggestions for improved wear performance of total knee replacements have included replacement of standard CoCr femoral components with ceramic and replacement of 3.5-Mrad ultra-high molecular weight polyethylene (UHMWPE) inserts with 5- or 7-Mrad UH
Autor:
Atsuhiro Imakiire, Kengo Yamamoto, Tatsuro Mizoue, Keiichi Kawanabe, Takaaki Shishido, Jiro Tamura, Ian C. Clarke, Toshinori Masaoka, Hiromu Shoji
Publikováno v:
International Orthopaedics. 27:286-290
Nineteen ultra-high-molecular-weighted polyethylene (UHMWPE) cups were retrieved at revision surgery. The implant period was on average 9.9 (0.25-20.7) years. The cups were classified into the high-wear group (wear rate above 140 mm(3)/year), interme
Autor:
Kengo Yamamoto, Takaaki Shishido, Hiromu Shoji, Atsuhiro Imakiire, Toshinori Masaoka, Paul Allen Williams, Taiyo Asano, M. Boehler, Ian C. Clarke
Publikováno v:
Journal of Biomedical Materials Research. :638-647
Three THAs with cementless monolithic alumina ceramic sockets and cementless Co-alloy stems were retrieved because of aseptic loosening after 17 and 24 years. At revision heads and cups were marked for orientation. Maps were drawn of wear patterns wi
Autor:
Atsuhiro Imakiire, Kengo Yamamoto, Paul Allen Williams, Toshinori Masaoka, Hiromu Shoji, Ian C. Clarke, Victoria D. Good, Jiro Tamura
Publikováno v:
Wear. 254:391-398
Wear in retrieved cups can be assessed by linear measurements of cup thickness, 3-D tracings of cup geometry and by fluid-displacement techniques. We used a hip simulator model to produce both creep and wear in 22.25 and 28 mm diameter hip implants a
Publikováno v:
Orthopedics. 1(5)
Treatment of ankle fractures should restore normal ankle joint anatomy. The systematic approach in analysis based on understanding of the anatomy, the roentgenograms and the mechanism of injury allow one to determine the elements of the lesion. The L
Publikováno v:
Orthopedics. 6(12)
Chemonucleolysis is found to compare favorably with laminectomy (71% good to excellent results versus 63% good to excellent) in the treatment of herniated nucleus pulposus. From a base of over 400 chemonucleolysis cases, recommendations for equipment
Autor:
Paul Allen Williams, Takaaki Shishido, Hiromu Shoji, Ian C. Clarke, Max Böhler, Atsuhiro Imakiire, Allen Gustafson, K. Keggi
Publikováno v:
Key Engineering Materials. :507-510
Autor:
Eiji Shimozaki, Hiromu Shoji
Publikováno v:
The Journal of Arthroplasty. 11:198-201
In a series of 647 total knee arthroplasties, the patella was not resurfaced if bony geometry of the patella was good enough to maintain good congruency of the patella undersurface to the femoral component and the patella was tracking normally at the