Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Yoshinori Sawae Last modified date:2018.07.24

Professor / Machine Elements and Design Engineering Laboratory / Department of Mechanical Engineering / Faculty of Engineering


Papers
1. Maiko Mieda, Atsuta Ikiru, Yasuyuki Matsushita, Takehiro Morita, Yasunori Ayukawa, Yoshihiro Tsukiyama, Yoshinori Sawae, Kiyoshi Koyano, The effective design of zirconia coping on titanium base in dental implant superstructure, Dental Materials Journal, 10.4012/dmj.2017-022, 37, 2, 237-243, 2018.01, Zirconia exhibits good tissue compatibility and nontoxicity, making it a widely used esthetic replacement material for implant abutments. To avoid abutment-fracture, the parts composed of zirconia with a bonded metal component connected to the implant can be used. The purpose of this study was to design titanium and zirconia components with high fracture resistance at the zirconia component’s edge line. Three edge line designs of the titanium base and zirconia sleeve were made: chamfer, shoulder, and back-taper. To assess the strength of the abutment design, static loads were applied vertically and 30 degrees from the vertical axis. A test of tensile strength was also performed after chewing simulation. Conventional zirconia components mounted on a chamfer-type titanium base showed significantly lower fracture resistance than shoulder and back-taper types. This study suggests that to improve the durability of zirconia abutments with a titanium base, a back-tapered edge design is recommended..
2. Mechanical design assessment of zirconia abutment supported on titanium base.
3. D. Nečas, Yoshinori Sawae, T. Fujisawa, Kazuhiro Nakashima, Takehiro Morita, Tetsuo Yamaguchi, M. Vrbka, I. Křupka, M. Hartl, The Influence of Proteins and Speed on Friction and Adsorption of Metal/UHMWPE Contact Pair, Biotribology, 10.1016/j.biotri.2017.03.003, 11, 51-59, 2017.09, It was reported in several studies that friction and wear of joint prosthesis are apparently influenced by the proteins contained in the synovial fluid. However, detailed mechanisms of these tribological processes have not been clarified yet. The present study aims on the effect of adsorbed protein film on frictional behaviour of metal/polyethylene contact pair. Reciprocating pin-on-plate test was conducted, while the CoCrMo pin was sliding against UHMWPE plate. The contact was lubricated by various solutions of albumin and γ-globulin solved in PBS. After the friction test, the thickness of adsorbed film was evaluated using spectroscopic ellipsometry. Structure of the adsorbed proteins was later examined by FT-IR. The results showed that at low sliding speed equal to 10 mm/s, there was a linear correlation between the friction coefficient and the thickness of the adsorbed protein film. An increase of friction was thus accompanied by the evolution of protein film. In that case, both proteins undergone substantial conformational changes, losing their original structure. On the contrary, proteins could sustain their secondary structure to some extent at higher sliding speed (50 mm/s), when different behaviour of the both proteins could be observed. This phenomenon was attributed to different structure of albumin and γ-globulin in its native state. It might be concluded that friction coefficient of metal-on-polyethylene joint prosthesis is influenced by protein content, as well as kinematic conditions, since the sliding conditions have a certain effect on both the adsorbed film formation and structure of the adsorbed molecules..
4. Teruo Murakami, Seido Yarimitsu, Nobuo Sakai, Kazuhiro Nakashima, Tetsuo Yamaguchi, Yoshinori Sawae, Atsushi Suzuki, Ardian Morina, Anne Neville, Tomasz Liskiewicz, Superior lubrication mechanism in poly(vinyl alcohol) hybrid gel as artificial cartilage, Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 10.1177/1350650117712881, 231, 9, 1160-1170, 2017.09, With recent progress of material technologies, the wear resistance of ultra-high molecular weight polyethylene for total joint prostheses has been improved, but under severe conditions friction and wear problems have not yet been completely solved. Therefore, the application of artificial hydrogel cartilage with similar properties to natural articular cartilage is expected to solve the friction and wear problems by improvement of lubrication mechanism with superior tribological functions. In this study, reciprocating tests of four kinds of poly(vinyl alcohol) hydrogels were carried out and the biphasic finite element analysis was conducted. As artificial cartilage specimens, four kinds of poly(vinyl alcohol) hydrogels were prepared using the repeated freeze-thawing (FT) method, the cast-drying (CD) method and the hybrid method with different layered structure as FT on CD or CD on FT. In reciprocating test of ellipsoidal poly(vinyl alcohol) hydrogel specimen against flat glass plate in saline solution, four kinds of hydrogels exhibited very different frictional levels as hybrid (CD on FT) < CD < FT < hybrid (FT on CD). It is noticed that hybrid (CD on FT) gel maintained extremely low friction and showed minimal wear. The effectiveness of biphasic lubrication was evaluated by biphasic finite element analysis. The importance of the load support by fluid phase at early stage and the surface lubricity after lowering of interstitial fluid pressure in poly(vinyl alcohol) hybrid (CD on FT) gel are discussed by comparison of experiment and finite element analysis..
5. Teruo Murakami, Seido Yarimitsu, Nobuo Sakai, Kazuhiro Nakashima, Tetsuo Yamaguchi, Yoshinori Sawae, Importance of adaptive multimode lubrication mechanism in natural synovial joints, Tribology International, 10.1016/j.triboint.2016.12.052, 113, 306-315, 2017.09, The superior tribological performance in natural synovial joints with low friction and minimal wear appears to be actualized by not single lubrication mode but the synergistic combination of various modes from the fluid film lubrication to boundary lubrication corresponding to the severity of rubbing conditions. We have conducted the biphasic finite element analysis and some experimental studies for articular cartilage to elucidate this ingenious lubrication mechanism from the viewpoint of the adaptive multimode lubrication mechanism. In this paper, the effectiveness of different lubrication modes such as biphasic, boundary, gel-film and hydration lubrication particularly at low speed conditions is discussed..
6. Keisuke Fukuda, Yoshifumi Shigyo, Hideaki Ariura, Seiji Omata, Takehiro Morita, Tetsuo Yamaguchi, Yoshinori Sawae, Relationship between dynamic stress field and ECM production in regenerated cartilage tissue, 27th International Symposium on Micro-NanoMechatronics and Human Science, MHS 2016 2016 International Symposium on Micro-NanoMechatronics and Human Science, MHS 2016, 10.1109/MHS.2016.7824183, 2017.01, Mechanical stresses exerted in articular cartilage during daily joint movements can stimulate the metabolism of chondrocytes in cartilage. Upregulative effects of mechanical stimuli on extracellular matrix (ECM) biosynthesis of chondrocytes have been utilized in the cartilage tissue for regenerative tissue engineering. However, dynamic functionalities of these regenerated cartilages were lacked compared with the natural arthrodial cartilage. Natural synovial joint surfaces are contacting and sliding each other. As a result, the loading condition applied to the cartilage tissue is not simple. Under the contact between surfaces, non-uniform stress distribution is exerted in the cartilage tissue. The shear stress at contact area is highly depended on the distance from the surface. Moreover, the surface region is exposed to larger shear stress compared with the deep region. We hypothesized that high stress in surface region may stimulate chondrocytes selectively and establish anisotropic structure in elaborated tissue. In this study, the relative motion between cartilage surfaces in a synovial joint is simulated by the rolling-sliding motion of the roller on the cultured chondrocyte-agarose construct. Then, we investigated effects on the ECM distribution and morphology of regenerated cartilage tissue..
7. Tetsuo Yamaguchi, Yoshinori Sawae, Shmuel M. Rubinstein, Effects of loading angles on stick–slip dynamics of soft sliders, Extreme Mechanics Letters, 10.1016/j.eml.2016.09.008, 9, 2, 331-335, 2016.12.
8. Dipankar Choudhury, Juergen M Lackner, Lukasz Major, Takehiro Morita, Yoshinori Sawae, Azuddin Bin Mamat, Ian Stavness, Chanchal K Roy, Ivan Krupka, Improved wear resistance of functional diamond like carbon coated Ti-6Al-4V alloys in an edge loading conditions, JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, 10.1016/j.jmbbm.2016.04.004, 59, 586-595, 2016.06.
9. Changhee Cho, Teruo Murakami, Yoshinori Sawae, Influence of elastic recovery of machining surface asperities on the contact stress and plastic strain of polyethylene tibial insert in virgin knee prosthesis, Tribology Online, 10.2474/trol.11.320, 11, 2, 320-325, 2016.04.
10. Nobuo Sakai, C. Hashimoto, Seido Yarimitsu, Yoshinori Sawae, M. Komori, Teruo Murakami, A functional effect of the superficial mechanical properties of articular cartilage as a load bearing system in a sliding condition, Biosurface and Biotribology, 2016.03.
11. Dipankar Choudhury, Takehiro Morita, Yoshinori Sawae, Juergen M. Lackner, Mark Towler, Ivan Krupka, A novel functional layered diamond like carbon coating for orthopedics applications, DIAMOND AND RELATED MATERIALS, 10.1016/j.diamond.2015.11.011, 61, 56-69, 2016.01.
12. Lei Zhang, Yoshinori Sawae, Teruo Murakami, Hong Yang, Ken Yuki, Investigation of wear and wear particles from shelf-aged crosslinked UHMWPE under
different contact pressures, Triboloby Online, 10.2474/trol.10.404, 10, 6, 404-412, 2015.12.
13. Teruo Murakami, Seido Yarimitsu, Kazuhiro Nakashima, Nobuo Sakai, Yoshinori Sawae, Tetsuo Yamaguchi, Atsushi Suzuki, Biphasic and boundary lubrication mechanisms in artificial hydrogel cartilage: A review, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, 10.1177/0954411915611160, 229, 12, 864-878, 2015.12.
14. Lei Zhang, Yoshinori Sawae, Tetsuo Yamaguchi, Teruo Murakami, Hong Yang, Effect of radiation dose on depth-dependent oxidation and wear of shelf-aged gamma-irradiated ultra-high molecular weight polyethylene (UHMWPE), TRIBOLOGY INTERNATIONAL, 10.1016/j.triboint.2014.12.011, 89, 78-85, 2015.09.
15. Teruo Murakami, Nobuo Sakai, Tetsuo Yamaguchi, Seido Yarimitsu, Kazuhiro Nakashima, Yoshinori Sawae, Atsushi Suzuki, Evaluation of a superior lubrication mechanism with biphasic hydrogels for artificial cartilage, TRIBOLOGY INTERNATIONAL, 10.1016/j.triboint.2014.12.013, 89, 19-26, 2015.09.
16. Omata Seiji, Yoshinori Sawae, Teruo Murakami, Effect of poly(vinyl alcohol) (PVA) wear particles generated in water lubricant on immune response of macrophage, Biosurface and Biotribology, 10.1016/j.bsbt.2015.02.003, 1, 71-79, 2015.03, To develop a novel biotribological material for artificial cartilage implant with a lubricity supplement of the joint surface, we focused on two
types of poly(vinyl alcohol) (PVA) hydrogel: repeated freeze–thawing (PVA-FT) and cast-drying (PVA-CD) gels. Here we observed the
morphology of wear particles generated during a reciprocating wear test and assessed macrophage immune responses by applying hydrogel wear
particles. As a result, PVA-CD had a significantly lower total amount of wear than did PVA-FT. The size distributions of PVA-FT and -CD wear
particles were similar. Most of the particles were nanoparticles up to approximately 50 nm in diameter. Considering the particle volume
distribution, there were very few micron- and submicron-sized wear particles around 1 μm in diameter. In SEM observations of dried PVA wear
particles, both distributions of wear particles of PVA-FT and -CD were similar. Micron-sized wear particles were chiefly formed by close packing
of 20- to 50-nm-sized particles. Biochemical and immunological evaluations revealed no cytotoxic effects of wear particles on macrophages.
Cytokine synthesis of both wear particle-stimulated groups was significantly lower than that of the lipopolysaccharide-stimulated positive control.
Therefore, it is suggested that PVA wear particles do not affect the macrophage immune response..
17. Lei Zhang, Yoshinori Sawae, Tetsuo Yamaguchi, Teruo Murakami, Hong Yang, Investigation on oxidation of shelf-aged crosslinked Ultra-High Molecular Weight Polyethylene (UHMWPE) and its effects on wear characteristics, Tribology Online, 10, 1, 1-10, 2015.01.
18. Teruo Murakami, Seido Yarimitsu, Kazuhiro Nakashima, Tetsuo Yamaguchi, Yoshinori Sawae, Nobuo Sakai, Atsushi Suzuki, Superior lubricity in articular cartilage and artificial hydrogel cartilage, PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY, 10.1177/1350650114530273, 228, 10, 1099-1111, 2014.10.
19. Seido Yarimitsu, Kazuhiro Nakashima, Yoshinori Sawae, Teruo Murakami, Influence of phospholipid and protein constituents on tribological properties of artificial hydrogel cartilage material, Journal of Biomechanical Science and Engineering, 8, 3, 257-267, 2013.05.
20. Daisuke Esaki, Yasuyuki Matsushita, Yasunori AYUKAWA, NOBUO SAKAI, Yoshinori Sawae, kiyoshi koyano, Relationship between magnitude of immediate loading and peri-implant osteogenesis in dogs, 10.1111/j.1600-0501.2011.02305.x, 23, 11, 1290-1296, 2012.11.
21. Omata Seiji, Shogo Sonokawa, Yoshinori Sawae, Teruo Murakami, Effects of both vitamin C and mechanical stimulation on improving the mechanical characteristics of regenerated cartilage, 10.1016/j.bbrc.2012.07.019, 424, 4, 724-729, 2012.08.
22. NOBUO SAKAI, Yuichiro Hagihara, Tsukasa Furusawa, Natsuko Hosoda, Yoshinori Sawae, Teruo Murakami, Analysis of biphasic lubrication of articular cartilage loaded by cylindrical indenter, 10.1016/j.triboint.2011.03.016, 46, 2, 225-236, 2012.02.
23. Contact Analysis between Microscopic Surface Asperity of a Virgin Femoral Component and Ultra-High Molecular Weight Polyethylene.
24. Seiji OMATA, Yoshinori SAWAE, Teruo MURAKAMI, Influence of Ascorbic acid (AsA) Concentration in Culture Medium on Mechanical Property of Regenerated Cartilage, Journal of Environment and Engineering, 6, 416-425, 2011.03.
25. Y. Sawae, K. Fukuda, E. Miyakoshi, S. Doi, H. Watanabe, K. Nakashima, J. Sugimura, Tribological Characterization of Polymeric Sealing Materials in High Pressure Hydrogen Gas, Proceedings of the STLE/ASME 2010 International Joint Tribology Conference, IJTC2010-41238, 2010.10.
26. Natsuko Hosoda, Nobuo SAKAI, Yoshinori SAWAE and Teruo MURAKAMI, Finite Element Analyses of Articular Cartilage Models Considering Depth-Dependent Elastic Modulus and Collagen Fiber Network, Journal of Biomechanical Science and Engineering, 5, 4, 437-448, 2010.10.
27. Influence of phospholipid bilayer on frictional behavior of artificial articular cartilage material.
28. K. Nakashima, Y. Sawae, N. Tsukamoto, H. Miura, Y. Iwamoto, T. Murakami, Wear behaviour of an artificial cartilage material for hemiarthroplasty, IFMBE Proceedings, 31, 1169-1172, 2010.08.
29. S. Yarimitsu, K. Nakashima, Y. Sawae and T. Murakami, The Role of Subchondral Tissues on Lubrication Properties of Natural Articular Cartilage, IFMBE Proceedings, 31, 911-914, 2010.08.
30. S. Omata, T. Shimizi, Y. Sawae, T. Murakami, Effect of vitamin C on mechanical property of the regenerated-cartilage tissue, IFMBE Proceedings, 31, 899-902, 2010.08.
31. Influence of synovia constituents on frictional behavior of artificial cartilage material and formation of boundary lubricating film.
32. C. Morillo, Y. Sawae and T. Murakami, Effect of bovine serum constituents on the surface of the tribological pair alumina/alumina nanocomposites for total hip replacement, Tribology International, 43, 5月6日, 1158-1162, 2010.05.
33. C.H. Cho, T. Murakami and Y. Sawae, Influence of microscopic surface asperities on the wear of ultra-high molecular weight polyethylene in a knee prosthesis, Proc. Instn Mech. Engrs Part H, 224, 515-529, 2010.04.
34. K. Nakashima, A. Yamaguchi, Y. Kurono, Y. Sawae, T. Murakami and J. Sugimura, Effect of high-pressure hydrogen exposure on wear of polytetrafluoroethylene sliding against stainless steel, Proc. Instn Mech. Engrs Part J, 224, 285-292, 2010.01.
35. Seido Yarimitsu, Kazuhiro Nakashima, Yoshinori Sawae and Teruo Murakami,, Influences of Lubricant Composition on Forming Boundary Film Composed of Synovia Constituents, Tribology International, 42, 11月12日, 1615-1625, 2009.11.
36. S. Sakai, S. Ito, Y. Ogushi, I. Hashimoto, N. Hosoda, Y. Sawae and K. Kawakami, Enzymatically fabricated and degradable microcapsules for production of multicellular spheroids with well-defined diameters of less than 150 μm, Biomaterials, 30, 30, 5937-5942, 2009.10.
37. Yoshinori SAWAE, Kazuhiro NAKASHIMA, Shunichiro DOI, Teruo MURAKAMI and Joichi SUGIMURA, Effects of High Pressure Hydrogen on Wear of PTFE and PTFE Composite, Proceedings of the ASME/STLE 2009 International Joint Tribology Conference, 2009.10.
38. S. Omata, Y. Sawae and T. Murakami, Influence of Ascorbic acid(AsA) concentration in culture medium on mechanical property of regenerated cartilage, Proceedings of World Congress on Medical Physics and Biomedical Engineering, 25, 2009.09.
39. Yoshinori SAWAE, Takayuki SARUWATARI, Seido YARIMITSU and Teruo MURAKAMI, Effects of Lubricant Lipid Concentration on Wear Rate of UHMWPE and Characteristics of Wear Particles in Multidirectional Sliding Wear Test, Proceedings of World Tribology Congress 2009, 888, 2009.09.
40. Kazuhiro NAKASHIMA, Yoshie KURONO, Yoshinori SAWAE, Teruo MURAKAMI and Joichi SUGIMURA, Effect of Moisture Content on Wear of PTFE in Hydrogen, Proceedings of World Tribology Congress 2009, 658, 2009.09.
41. Changhee CHO, Teruo MURAKAMI and Yoshinori SAWAE, Influence of Microscopic Surface Topography on the Wear Phenomenon in Knee Prosthesis, Proceedings of World Tribology Congress 2009, 648, 2009.09.
42. Teruo MURAKAMI, Yoshinori SAWAE, Kazuhiro NAKASHIMA, Nobuo SAKAI and Seido YARIMITSU, Importance of Materials and Lubricants on Tribological Properties in Joint Prostheses in Comparison with Natural Synovial Joints, Proceedings of World Tribology Congress 2009, 74, 2009.09.
43. Yoshinori SAWAE, Daichi YAMAMOTO, Kazuhiro NAKASHIMA, Shunichiro DOI, Teruo MURAKAMI and Joich SUGIMURA, Wear Characteristics of PTFE and PTFE Based Composites in Gaseous Hydrogen, Proceedings of World Tribology Congress 2009, 18, 2009.09.
44. Hiroyoshi TANAKA, Yoshinori SAWAE, Kanao FUKUDA, Shigemasa YAMAGAMI, Takehiro MORITA, Naoshi IZUMI and Joich SUGIMURA, New Experiment System for Sliding Tests in Hydrogen and Surface Analysis with Transfer Vessel, Tribology Online, 4, 4, 82-87, 2009.07.
45. Teruo MURAKAMI, Kazuhiro NAKASHIMA, Yoshinori SAWAE, Nobuo SAKAI and Natsuko HOSODA, Roles of adsorbed film and gel layer in hydration lubrication for articular cartilage, Proc. IMechE Part J: J. Engineering Tribology, 223, 287-295, 2009.05.
46. Teruo MURAKAMI, Kazuhiro NAKASHIMA, Yoshinori SAWAE, Nobuo SAKAI, Seido YARIMITSU and Natsuko HOSODA, Roles of adsorbed film and gel layer in hydration lubrication in natural synovial joints, Abstract. 4th Asian Pacific Conference on Biomechanics, 178-179, 2009.04.
47. Yu MORIWAKI, Nobuo SAKAI, Yoshinori SAWAE and Teruo MURAKAMI, Development of Forearm Models Based on Human Musculoskeletal System, Journal of Biomechanical Science and Engineering, 4, 1, 153-164, 2009.04.
48. Tribology for Functional Tissue Engineering of Articular Cartilage.
49. Natsuko HOSODA, Nobuo SAKAI, Yoshinori SAWAE, Teruo MURAKAMI, Finite Element Analysis of Articular Cartilage Model Considering the Configuration and Biphasic Property of the Tissue, Proceedings of The 13th International Conference on BIOMEDICAL ENGINEERING 2008, On CD-ROM, 2008.12.
50. Yoshinori SAWAE, Kazuhiro NAKASHIMA, Akira YAMAGUCHI, Shunichiro DOI, Hiroyoshi TANAKA, Shigemasa YAMAGAMI, Yoshie KURONO, Teruo MURAKAMI, and Joich SUGIMURA, Transfer Film Formation and Wear of PTFE in Gaseous Hydrogen, Extended Abstracts of 2nd International Conference on Advanced Tribology 2008, pp.115-117, 2008.12.
51. Carlos MORILLO, Yoshinori SAWAE and Teruo MURAKAMI, Effect of Proteins on the Surface of the Tribological Pair Alumina/Alumina Nanocomposites for Total Hip Replacement, Extended Abstracts of 2nd International Conference on Advanced Tribology 2008, pp.59-61, 2008.12.
52. Carlos MORILLO, Yoshinori SAWAE and Teruo MURAKAMI, Tribological Analysis of Alumina Nanocomposites for Orthopedics Applications, Proceedings of STLE/ASME International Joint Tribology Conference, IJTC2008-71155, 2008.10.
53. Yoshinori SAWAE, Akira YAMAGUCHI, Kazuhiro NAKASHIMA, Teruo MURAKAMI and Joichi SUGIMURA, Wear Behavior of Polymeric Sealing Material in Gaseous Hydrogen, Proceedings of STLE/ASME International Joint Tribology Conference, IJTC2008-71225, 2008.10.
54. Influence of Microscopic Surface Asperity of Metallic Femoral Component on the Wear of Ultra-high Molecular Weight Polyethylene Tibial Insert.
55. Carlos MORILLO, Yoshinori SAWAE and Teruo MURAKAMI, Tribological Characteristics of Al2O3 Nanocomposites for Joint Prostheses, Journal of Biomechanical Science and Engineering, Vol.3, No.3, pp.209-220, 2008.09.
56. Seiji OMATA, Yoshinori SAWAE and Teruo MURAKAMI, The Influence of Mechanical Stimulation on the Development of Tissue-Engineered Cartilage, Proceedings of KAIST-Kyushu University Joint Seminar 2008, p.22, 2008.09.
57. Seido YARIMITSU, Kazuhiro NAKASHIMA, Yoshinori SAWAE and Teruo MURAKAMI, Effects of Lubricant Composition on Adsorption Behavior of Proteins on Rubbing Surface and Stability of Protein Boundary Film, Tribology Online, Vol.3, No.4, pp.238-242, 2008.08.
58. Natsuko HOSODA, Nobuo SAKAI, Yoshinori SAWAE, Teruo MURAKAMI, Depth-Dependence and Time-Dependence in Mechanical Behaviors of Articular Cartilage in Unconfined Compression Test under Constant Total Deformation, Journal of Biomechanical Science and Engineering, Vol.3, No.2, pp.209-220, 2008.07.
59. Yoshinori Sawae, Akio Yamamoto, Teruo Murakami, Influence of protein and lipid concentration of the test lubricant on the wear of ultra high molecular weight polyethylene, Tribology International, Vol.41, pp.648-656, 2008.07.
60. Hironobu KOSEKI, Hiroyuki SHINDO, Koumei BABA, Takamasa FUJIKAWA, Nobuo SAKAI, Yoshinori SAWAE, Teruo MURAKAMI, Surface-engineered metal-on-metal bearings improve the friction and wear properties of local area contact in total joint arthroplasty, Surface & Coatings Technology, Vol.202, No.19, pp.47754779, 2008.06.
61. Seido YARIMITSU, Kazuhiro NAKASHIMA, Yoshinori SAWAE, Teruo MURAKAMI, Study on the Mechanisms of Wear Reduction of Artificial Cartilage through in situ Observation on Forming Protein Boundary Film, Tribology Online, Vol. 2, No. 4, 114-119, 2007.12.
62. Carlos MORILLO, Yoshinori SAWAE, Teruo MURAKAMI, Surface Analysis of the Tribological Pair Al2O3 Nanocomposites and Al2O3 in Different Media, Journal of Biomechanical Science and Engineering, Vol.2, Suppl. 1, p.208, 2007.11.
63. Nobuo SAKAI, Katsuki HAYASHI, Shunsuke YAMAGUCHI, Eiichi FUKAHORI, Shihoko SHIMIZU, Akiomi KOGA, Yoshinori SAWAE, Teruo MURAKAMI, The Development of Shoulder Motor Orthosis for Stroke Rehabilitation, Journal of Biomechanical Science and Engineering, Vol.2, Suppl. 1, p.191, 2007.11.
64. Yu MORIWAKI, Nobuo SAKAI, Yoshinori SAWAE, Teruo MURAKAMI, Development of an Arm Model with a Bionic Elbow Joint, Journal of Biomechanical Science and Engineering, Vol.2, Suppl. 1, p.112, 2007.11.
65. Natsuko HOSODA, Nobuo SAKAI, Yoshinori SAWAE, Teruo MURAKAMI, Finite Element Analysis of Cartilage Considering the Depth Dependence and Time Dependence of Young’s modulus under Constant Total Compressive Deformation, Journal of Biomechanical Science and Engineering, Vol.2, Suppl. 1, p.79, 2007.11.
66. Teruo MURAKAMI, Kazuhiro NAKASHIMA, Yoshinori SAWAE, Roles of Adsorbed Film in Hydration Lubrication for Articular Cartilage, Journal of Biomechanical Science and Engineering, Vol.2, Suppl. 1, p.7, 2007.11.
67. Yoshinori SAWAE, Akira YAMAGUCHI, Kazuhiro NAKASHIMA, Teruo MURAKAMI, Joichi SUGIMURA, Effects of Hydrogen Atmosphere on Wear Behavior of PTFE Sliding Against Austenitic Stainless Steel, Proceedings of ASME/STLE International Joint Tribology Conference, IJTC2007-44285, 2007.10.
68. Kazuhiro NAKASHIMA, Yoshinori SAWAE, Teruo MURAKAMI, Effect of the conformational changes and differences of proteins on the frictional properties of Poly (vinyl alcohol) Hydrogel, Tribology International, Vol.40, pp.1423-1427, 2007.10.
69. Yoshinori SAWAE, Tatsuro IKEGAMI, Yasuyuki MATSUSHITA, Nobuo SAKAI, Kiyoshi KOYANO, Teruo MURAKAMI, Cyclic Loading Test of Dental Implant with Mastication Simulator, Proceedings of International Conference on Advanced Technology in Experimental Mechanics 2007, On CD-ROM, 2007.09.
70. Yoshinori SAWAE, Jun HONDA, Emiko SUZUKI, Yasuyuki MORITA, Masao WATANABE, Toshiyuki SANADA, Teruo MURAKAMI, Experimental Characterization of Regenerated Cartilage Model Cultured under Cyclic Compression, Proceedings of International Conference on Advanced Technology in Experimental Mechanics 2007, On CD-ROM, 2007.09.
71. Seido YARIMITSU, Kazuhiro NAKASHIMA, Yoshinori SAWAE, Teruo MURAKAMI, In Situ Observation of Forming Boundary Film Composed of Synovia Constituents on Rubbing Surface of Artificial Cartilage Material, Proceedings of International Conference on Advanced Technology in Experimental Mechanics 2007, On CD-ROM, 2007.09.
72. Kazuhiro NAKASHIMA, Naohiro TAKAMURA, Yosinori SAWAE, Teruo MURAKAMI, Mechanisms of Protein Boundary Film Formation for Poly (vinyl alcohol) Hydrogel as Artificial Cartilage Material, Proceedings of International Conference on Advanced Technology in Experimental Mechanics 2007, On CD-ROM, 2007.09.
73. Yoshinori SAWAE, Akio YAMAMOTO, Teruo MURAKAMI, Accelerated Wear of UHMWPE for Joint Prosthesis in Physiological Solutions Containing Protein and Lipid, Proceedings of EUROCORR 2007, On CD-ROM, 2007.09.
74. Y. Kitajima, S. Sugino, Toshiyuki Sanada, Yoshinori SAWAE, Teruo MURAKAMI, Masao WATANABE, Transport phenomena in engineered cartilage with tissue development in agarose gel, Proceedings of the 5th Joint ASME/JSME Fluids Engineering Conference, FEDSM2007-37465, 2007.07.
75. Teruo MURAKAMI, Yoshinori SAWAE, Kazuhiro NAKASHIMA, Seido YARIMITSU, Tsutomu SATO, Micro- and Nanoscopic Biotribological Behaviours in Natural Synovial Joints and Artificial Joints, Proceedings of the Institution of Mechanical Engineers, Part J, Journal of Engineering Tribology, Vol.221, No.3, 237-245, 2007.05.
76. Kazuhiro NAKASHIMA, Yoshinori SAWAE, Teruo MURAKAMI, Influence of protein conformation on frictional properties of poly (vinyl alcohol) hydrogel for artificial cartilage, Tribology Letters, Vol.26, pp.145-151, 2007.05.
77. Carlos MORILLO, Yoshinori SAWAE, SW LEE, J Lira OLIVARSE, Teruo MURAKAMI, Tribological Analysis of Al2O3 Nanocomposites as an Alternative for Hip Joint Replacement Materials, Proceedings of 16th International Conference on Wear of Materials, On CD-ROM, 2007.04.
78. An Experimental Study on the Delamination Mechanism of UHMWPE for Artificial Joints.
79. The Development of Elbow Orthosis with Motor Function.
80. The Effect of the Mixing Ratio on the Temporary Cement Retention Force and Seating Discrepancy of Cement-retained Implant Superstructures.
81. K. Nakashima, Y. Sawae, T. Murakami, Study on Wear Reduction Mechanisms of Artificial Cartilage by Synergistic Protein Boundary Film Formation, JSME International Journal Series C, 10.1299/jsmec.48.555, 48, 4, 555-561, Vol.48, 555-561, 2005.12.
82. Y. Sawae, T. Murakami, T. Sawano, The Influences of Lipid and Protein Concentration on Wear of Ultra-High Molecular Weight Polyethylene, Life Cycle Tribology, Ed. D. Dowson et al., 171-177, 2005.11.
83. An Experimental Study on the Cold Flow of UHMWPE Tibial Insert.
84. Mechanical Test of Temporary Cementation for Dental Implant Using a Mastication Simulator.
85. Noninvasive in vivo Human Capillary Vessel Blood Flow Analysis.
86. The Development of Micro Testing Machine Equipped with Microscope and Visualization Method for Investigation of Cartilaginous Tissue.
87. T. Sawano, T. Murakami, Y. Sawae, Evaluation of Wear Resistance of Ultra-High Molecular Weight Polyethylene for Joint Prostheses in the Multi-Directional Pin-on-Plate Tester, Life Cycle Tribology, Ed. D. Dowson et al., 161-169, 2005.10.
88. A Study on the Cold Flow of UHMWPE Tibial Insert in Knee Prostheses.
89. High Speed Observation of Human Capillary Vessel Loop and Blood Flow Analysis.
90. Effect of Gamma Irradiation on Wear Characteristics of UHMWPE for Joint Prostheses.
91. T. MURAKAMI, N. SAKAI, Y. SAWAE, K. TANAKA and M. IHARA, Influence of Proteoglycan on Time-Dependent Mechanical Behaviors of Articular Cartilage under Constant Total Compressive Deformation, JSME International Journal, Series C, 10.1299/jsmec.47.1049, 47, 4, 1049-1055, Vol.47, 1049-1055, 2004.12.
92. Effect of protein boundary films on wear of artificial cartilage (2nd Report).
93. 3-dimensional measurement of range of motion in the shoulder joint in consideration of successive motion.
94. C.H. Cho, T. Murakami, Y. Sawae, N. Sakai, H. Miura, T. Kawano and Y. Iwanoto, Elasto-plastic contact analysis of an ultra-high molecular weight polyethylene tibial component based on geometrical measurement from a retrieved knee prosthesis, Proc. Instn Mech. Engrs, 10.1243/0954411041561018, 218, H4, 251-259, Vol.218 Part H, 251-259, 2004.09.
95. Evaluation of Wear Property of PVA Hydrogel as Artificial Cartilage and Effect of Protein Film on Wear-Resistant Property.
96. Y. Sawae, J. Shelton, D.L. Bader and M.M. Knight, Confocal Analysis of Local and Cellular Strains in Chondrocyte-Agarose Constructs Subjected to Mechanical Shear, Annals of Biomedical Engineering, 10.1023/B:ABME.0000030261.38396.c0, 32, 6, 860-870, Vol.32, 860-870, 2004.06.
97. T. Murakami, Y. Sawae and M. Ihara, Protective Mechanism of Articular Cartilage to Severe Loading: Roles of Lubricants, Cartilage Surface Layer, Extracellular Matrix and Chondrocyte, JSME International Journal Series C, 10.1299/jsmec.46.594, 46, 2, 594-603, Vor.46, 594-603, 2003.12.
98. Effect of Protein Adsorbed Films on Wear of Artificial Cartilage.
99. Finite Element Analysis of Cold Flow in UHMWPE Tibial Component -Influence on Stress Distribution and Wear Behavior-.
100. Study on Surface Morphology of Human Osteoarthritic Cartilage with Atmic Force Microscopy.
101. The Evaluation of Structual Role of Proteoglycan in Articular Cartilage under Constant Compression.
102. Y. Sawae, T. Murakami, T. Sawano, I. Noda and T. Shimotoso, Surface Characteristics and Tribological Behaviour of New Zirconia Ceramics for Cementless Knee Joint Prostheses, Tribological Research and Design for Engineering Systems, 263-271, 263-271, 2003.09.
103. Evaluation of Wear Characteristics of Artificial Joint Materials in the Multi-Directional Pin-on-Plate Tester.
104. Modelling of Articular Cartilage Containing Chondrocytes and Finite Element Analysis for Articular Cartilage and Chondrocytes Under Compression.
105. M. Ihara, T. Murakami and Y, Sawae, Finite Element Analyses for Time-dependent and Depth-dependent Deformation of Articular Cartilage and Chondrocytes Under Constant Compression, Memoirs of the Faculty of Engineering, Vol.62, 165-177, 2002.12.
106. Elasto-Plastic Contact Analysis on Fatigue Wear Behavior of UHMWPE Tibial Components.
107. Effect of Protein Ingredient on Friction and Wear of PVA Hydrogel as Artificial Cartilage.
108. Examination of Chondrocytes within Articular Cartilage Using Confocal Laser Scanning Microscopy and Analysis of Stress-Strain Transmission.
109. Contact Analysis of UHMWPE Tibial Component Based on Geometrical Measurement for Retrieved Knee Prosthesis.
110. N. Sakai, T. Murakami and Y. Sawae, A Development of Joint mechanism of Robot Arm Based on Human Shoulder Mechanism, Memoirs of the Faculty of Engineering, Vol.61, 123-138, 2001.12.
111. Y. Sawae, T. Murakami, K. Matsumoto and M. Horimoto, Study on Morphology and Lubrication of Articular Cartilage Surface With Atomic Force Microscopy, Japanese Journal of Tribology, 45, 2, 150-157, Vol.45, 51-62, 2001.11.
112. Y. Sawae and T. Murakami, Wear Mechanism of Ultra-high Molecular Weight Polyethylene in Multidirectional Sliding Wear Test, Proc. International Tribology Conference Nagasaki, 2000, 1521-1526, 2001.10.
113. K. Nakashima, T. Murakami and Y. Sawae, Evaluation of Tribological Properties of Polyvinyl Alcohol Hydrogel as Artificial Cartilage, Proc. International Tribology Conference Nagasaki, 2000, 1537-1540, 2001.10.
114. C. Cho, T, Murakami and Y. Sawae, Elasto-Plastic Contact Analysis of Ultra-High Molecular Weight Polyethylene for Artificial Knee Joint using Finite Element Method, Proc. International Tribology Conference Nagasaki, 2000, 1503-1508, 2001.10.
115. Plasma Carburized Titanium Alloy as Bearing Surface Material for Joint Prostheses.
116. Trajectory Analysis of Catching Motion in a Hand Using a Falling Weight and Three Dimensional Position Sensor.
117. Evaluation of Wear in Retrieved Knee Prostheses.
118. Strain Analysis of Articular Cartilage Using Finit Element Method.
119. Y. Sawae, T. Murakami, T Sawano, I. Noda and T. Shimotoso, Quantitative Evaluation of Wear Property of Polyethylene-on-Ceramic Sliding Pairs for Joint Prostheses in Multidirectional Sliding Test, Bioceramics, 218-2, 665-668, Vol.14, 665-668, 2001.10.
120. Friction and Wear Properties of PVA Hydrogel.
121. Y.Sawae and T. Murakami, Role of Synovia in Wear Mechanism of UHMWPE, Tribology in Biomechanical Systems, Science and Applications, 31-45, 2001.09.
122. C. Cho, T. Murakami, Y. Sawae, H. Miura, T. Kawano and Y. Iwamoto, A Study on the Fatigue Wear of UHMWPE in Artificial Knee Joints, Proc. The 5th International Joint Symposium between Chungnan National Univ. & Kyushu Univ, 49-55, 2001.09.
123. Y. Sawae, T. Murakami, S. Tashima and T. Shimotoso, Wear Test of Alumina-on-Alumina Sliding Pairs as Model Experiment for Wear in Ceramic-on-Ceramic Joint Prostheses, Tribology Research: From Model Experiment to Industrial Problem, 151-160, 2001.08.
124. Surface layer of articular cartilage observed by atomic force microscopy in liqid - Morphology and role in joint lubrication -.
125. T. Murakami, Y. Sawae, K. Nakashima and J. Fisher, Tribological Behaviour of Artificial Cartilage in Thin Film Lubrication, Thinning Films and Tribological Interface, 317-327, 2000.08.
126. Y. Sawae, T. Murakami and S. Doi, Worn Surface Characteristics of Ultra-High Molecular Weight PolyethyleneLubricated with Bovine Serum, Thinning Films and Tribological Interfaces, 347-356, 2000.08.
127. C. Cho,T. Murakami,Y. Sawae, H. Miura,T. Kawano,R. Nagamine,K. Urabe,S. Matsuda and Y. Iwamoto, Wear Characteristics of Ultra-High Molecular Weight Polyethylene Components in Retrieved Knee Prostheses, Proc. Biotribology Satellite Forum of ITC Nagasaki, 2000 and 21st Biotribology Symposium, 19-22, 2000.08.
128. Y. Sawae and T. Murakami, Effect of Protein and Lipid on Wear of Ultra-High Molecular Weight Polyethylene in Multidirectional Sliding Wear Test, Proc. Biotribology Satellite Forum of ITC Nagasaki, 2000 and 21st Biotribology Symposium, 7月8日, 2000.08.
129. T. Murakami, Y. Sawae and K. Nakashima, Importance of Lubrication in Total Replacement Joints with Compliant Artificial Cartilage, Trans. 6th World Biomaterials Congress Trans, 1079, 2000.05.
130. T. Murakami, Y. Sawae, S. Doi, S. Tashima and T. Shimotoso, Wear Reduction by Material Combination and Improvement of Microstructure in Ceramic-on-Ceramic Sliding for Total Joint Replacement, Trans. 6th World Biomaterials Congress Trans, 876, 2000.05.
131. Evaluation of in vivo Fixation and Stabilization of Polyvinyl Alcohol Hydrogel for Artificial Cartilage.
132. Study on Morphology and Lubrication of Articular Cartilage Surface with Atomic Force Microscopy.