Masayuki Kyomoto

Summary

Affiliation: Japan Medical Materials Corporation
Country: Japan

Publications

  1. ncbi Wear of '100 Mrad' cross-linked polyethylene: effects of packaging after 30 years real-time shelf-aging
    Masayuki Kyomoto
    Japan Medical Materials Corporation, Uemura Nissei Bldg 9F 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan
    J Biomater Sci Polym Ed 18:59-70. 2007
  2. doi Superlubricious surface mimicking articular cartilage by grafting poly(2-methacryloyloxyethyl phosphorylcholine) on orthopaedic metal bearings
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 91:730-41. 2009
  3. doi Effects of mobility/immobility of surface modification by 2-methacryloyloxyethyl phosphorylcholine polymer on the durability of polyethylene for artificial joints
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 90:362-71. 2009
  4. ncbi Effect of 2-methacryloyloxyethyl phosphorylcholine concentration on photo-induced graft polymerization of polyethylene in reducing the wear of orthopaedic bearing surface
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 86:439-47. 2008
  5. ncbi Enhanced wear resistance of orthopaedic bearing due to the cross-linking of poly(MPC) graft chains induced by gamma-ray irradiation
    Masayuki Kyomoto
    Research Division, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res B Appl Biomater 84:320-7. 2008
  6. ncbi Effects of photo-induced graft polymerization of 2-methacryloyloxyethyl phosphorylcholine on physical properties of cross-linked polyethylene in artificial hip joints
    Masayuki Kyomoto
    Research and Development Corporate Division, Japan Medical Materials Corporation, Uemura Nissei Bldg 9F, 3 3 31 Miyahara, Osaka, Japan
    J Mater Sci Mater Med 18:1809-15. 2007
  7. ncbi High lubricious surface of cobalt-chromium-molybdenum alloy prepared by grafting poly(2-methacryloyloxyethyl phosphorylcholine)
    Masayuki Kyomoto
    Research Division, Japan Medical Materials Corporation, Japan
    Biomaterials 28:3121-30. 2007
  8. ncbi Strain in UHMWPE for orthopaedic use studied by Raman microprobe spectroscopy
    Masayuki Kyomoto
    Research and Development Corporate Division, Japan Medical Materials Corporation, Uemura Nissei Bldg 9F 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan
    J Biomater Sci Polym Ed 18:165-78. 2007
  9. ncbi Enhanced wear resistance of modified cross-linked polyethylene by grafting with poly(2-methacryloyloxyethyl phosphorylcholine)
    Masayuki Kyomoto
    Research and Development Corporate Division, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 82:10-7. 2007
  10. pmc Cartilage-mimicking, high-density brush structure improves wear resistance of crosslinked polyethylene: a pilot study
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corp, 3 3 31, Miyahara, Yodogawa ku, Osaka, 532 0003, Japan
    Clin Orthop Relat Res 469:2327-36. 2011

Collaborators

Detail Information

Publications27

  1. ncbi Wear of '100 Mrad' cross-linked polyethylene: effects of packaging after 30 years real-time shelf-aging
    Masayuki Kyomoto
    Japan Medical Materials Corporation, Uemura Nissei Bldg 9F 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan
    J Biomater Sci Polym Ed 18:59-70. 2007
    ..The long-term shelf-storage conditions, which affect the surface oxidative degradation of PE, are assumed to be the key factor in the wear-resistance of gamma-irradiated UHMWPE...
  2. doi Superlubricious surface mimicking articular cartilage by grafting poly(2-methacryloyloxyethyl phosphorylcholine) on orthopaedic metal bearings
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 91:730-41. 2009
    ..A superlubricious metal-bearing surface would enable the development of a novel biocompatible artificial hip joint system-artificial femoral head for partial hemiarthroplasty and metal-on-polymer/metal type for total hip arthroplasty...
  3. doi Effects of mobility/immobility of surface modification by 2-methacryloyloxyethyl phosphorylcholine polymer on the durability of polyethylene for artificial joints
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 90:362-71. 2009
    ....
  4. ncbi Effect of 2-methacryloyloxyethyl phosphorylcholine concentration on photo-induced graft polymerization of polyethylene in reducing the wear of orthopaedic bearing surface
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 86:439-47. 2008
    ..In order to achieve nanometer-scale modification of poly(MPC) in this manner, it is necessary to use a long photo-irradiation time for the MPC graft polymerization system, which contains a high-concentration monomer without its gelation...
  5. ncbi Enhanced wear resistance of orthopaedic bearing due to the cross-linking of poly(MPC) graft chains induced by gamma-ray irradiation
    Masayuki Kyomoto
    Research Division, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res B Appl Biomater 84:320-7. 2008
    ..The cross-links formed by gamma-ray irradiation would give further longevity to the CLPE-g-MPC cups...
  6. ncbi Effects of photo-induced graft polymerization of 2-methacryloyloxyethyl phosphorylcholine on physical properties of cross-linked polyethylene in artificial hip joints
    Masayuki Kyomoto
    Research and Development Corporate Division, Japan Medical Materials Corporation, Uemura Nissei Bldg 9F, 3 3 31 Miyahara, Osaka, Japan
    J Mater Sci Mater Med 18:1809-15. 2007
    ..We concluded that the advantage of photo-induced radical graft polymerization technique was that the grafted MPC polymer gave a high lubricity only on the surface and has no effect on the bulk properties of the CLPE substrate...
  7. ncbi High lubricious surface of cobalt-chromium-molybdenum alloy prepared by grafting poly(2-methacryloyloxyethyl phosphorylcholine)
    Masayuki Kyomoto
    Research Division, Japan Medical Materials Corporation, Japan
    Biomaterials 28:3121-30. 2007
    ..Tribological studies with a pin-on-plate machine revealed that surface MPC grafting markedly lowered the friction coefficient. We concluded that the grafted poly(MPC) layer successfully provided high lubricity to the Co-Cr-Mo surface...
  8. ncbi Strain in UHMWPE for orthopaedic use studied by Raman microprobe spectroscopy
    Masayuki Kyomoto
    Research and Development Corporate Division, Japan Medical Materials Corporation, Uemura Nissei Bldg 9F 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan
    J Biomater Sci Polym Ed 18:165-78. 2007
    ..Thus, Raman microprobe spectroscopy is a very effective method for analyzing UHMWPE for orthopaedic use...
  9. ncbi Enhanced wear resistance of modified cross-linked polyethylene by grafting with poly(2-methacryloyloxyethyl phosphorylcholine)
    Masayuki Kyomoto
    Research and Development Corporate Division, Japan Medical Materials Corporation, Osaka, Japan
    J Biomed Mater Res A 82:10-7. 2007
    ..12 and 0.16 mg/10(6) cycles, respectively. Therefore, the grafting of an MPC polymer with high density would be essential in order to maintain the long-term wear resistance of CLPE-g-MPC as an orthopedic bearing material...
  10. pmc Cartilage-mimicking, high-density brush structure improves wear resistance of crosslinked polyethylene: a pilot study
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corp, 3 3 31, Miyahara, Yodogawa ku, Osaka, 532 0003, Japan
    Clin Orthop Relat Res 469:2327-36. 2011
    ....
  11. doi Ceramic versus cobalt-chrome femoral components; wear of polyethylene insert in total knee prosthesis
    Hironobu Oonishi
    H Oonishi Memorial Joint Replacement Institute, Tominaga Hospital, Naniwa ku, Osaka, Japan
    J Arthroplasty 24:374-82. 2009
    ..In contrast, oxidative degradation and/or delamination was confirmed. Thus, we conclude that alumina ceramic/ethylene oxide gas-sterilized UHMWPE insert in a total knee prosthesis might exhibit a good wear resistance...
  12. pmc Oxidation and wear of 100-Mrad cross-linked polyethylene shelf-aged for 30 years
    Hironobu Oonishi
    H Oonishi Memorial Joint Replacement Institute, Tominaga Hospital, Osaka, Japan
    Clin Orthop Relat Res 466:347-52. 2008
    ..25 x 10(6) cycles with a subsequently reduced wear rate of 5 mg/10(6) cycles after 5 x 10(6) cycles. Packaging over long periods inhibits surface oxidation and maintains the wear resistance of gamma-irradiated UHMWPE cups...
  13. doi A hydrated phospholipid polymer-grafted layer prevents lipid-related oxidative degradation of cross-linked polyethylene
    Masayuki Kyomoto
    Department of Materials Engineering, School of Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8655, Japan Research Department, KYOCERA Medical Corporation, 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan
    Biomaterials 112:122-132. 2017
    ....
  14. pmc Effects of Surface Modification and Bulk Geometry on the Biotribological Behavior of Cross-Linked Polyethylene: Wear Testing and Finite Element Analysis
    Kenichi Watanabe
    Research Department, KYOCERA Medical Corporation, Osaka, Japan Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
    Biomed Res Int 2015:435432. 2015
    ..A highly hydrated bearing surface layer, formed by PMPC grafting, and a cross-linking-strengthened substrate of adequate thickness are essential for increasing the wear and creep deformation resistances. ..
  15. doi Prevention of bacterial adhesion and biofilm formation on a vitamin E-blended, cross-linked polyethylene surface with a poly(2-methacryloyloxyethyl phosphorylcholine) layer
    Masayuki Kyomoto
    Department of Materials Engineering, School of Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8655, Japan Research Department, KYOCERA Medical Corporation, 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan
    Acta Biomater 24:24-34. 2015
    ..Thus, this modification may prove useful for the production of artificial hip joint replacement materials...
  16. doi Effect of UV-irradiation intensity on graft polymerization of 2-methacryloyloxyethyl phosphorylcholine on orthopedic bearing substrate
    Masayuki Kyomoto
    Department of Materials Engineering, School of Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo, 113 8656, Japan Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo, 113 8656, Japan Research Department, KYOCERA Medical Corporation, 3 3 31, Miyahara, Yodogawa ku, Osaka, 532 0003, Japan
    J Biomed Mater Res A 102:3012-23. 2014
    ..The highly hydrated thin PMPC films mimicked the native cartilage extracellular matrix that covers synovial joint surface, acting as an extremely efficient lubricant, and providing high-wear resistance...
  17. doi Biomimetic hydration lubrication with various polyelectrolyte layers on cross-linked polyethylene orthopedic bearing materials
    Masayuki Kyomoto
    Department of Materials Engineering, School of Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Biomaterials 33:4451-9. 2012
    ..Thus, such nanometer-scaled hydrophilic polymers or polyelectrolyte layers on the CLPE surface of acetabular cup bearings could confer high durability to THA prosthetics...
  18. doi Radiographic and retrieval wear analyses of the first generation highly cross-linked polyethylene cup against a ceramic femoral head
    Hiroyuki Oonishi
    H Oonishi Memorial Joint Replacement Institute, Tominaga Hospital, Osaka, Japan
    J Biomed Mater Res B Appl Biomater 101:1594-601. 2013
    ..In conclusion, CLPE cups used with alumina ceramic femoral heads in total hip arthroplasty should have favorable wear resistance in several in vivo situations...
  19. doi Poly(2-methacryloyloxyethyl phosphorylcholine) grafting and vitamin E blending for high wear resistance and oxidative stability of orthopedic bearings
    Masayuki Kyomoto
    Department of Materials Engineering, School of Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8655, Japan Research Department, KYOCERA Medical Corporation, 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan
    Biomaterials 35:6677-86. 2014
    ..In conclusion, the PMPC-grafted HD-CLPE(VE) provided simultaneously high-wear resistance, oxidative stability, and mechanical properties...
  20. doi Poly(ether-ether-ketone) orthopedic bearing surface modified by self-initiated surface grafting of poly(2-methacryloyloxyethyl phosphorylcholine)
    Masayuki Kyomoto
    Department of Materials Engineering, School of Engineering, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    Biomaterials 34:7829-39. 2013
    ..A variety of test revealed significant improvements in the water wettability, frictional properties, and wear resistance of the surfaces and interfaces. ..
  21. ncbi Change in UHMWPE properties of retrieved ceramic total knee prosthesis in clinical use for 23 years
    Hironobu Oonishi
    H Oonishi Memorial Joint Replacement Institute, Tominaga Hospital, Osaka, Japan
    J Biomed Mater Res B Appl Biomater 74:754-9. 2005
    ....
  22. doi Time course of surface characteristics of alkali- and heat-treated titanium dental implants during vacuum storage
    Michimasa Kamo
    Research Department, KYOCERA Medical Corporation, Yodogawa ku, Osaka, 532 0003, Japan
    J Biomed Mater Res B Appl Biomater . 2016
    ..Further, it is expected that AH-treated Ti dental implants controllably aged during a shelf storage will exhibit high stability and bone-bonding bioactivity. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2016...
  23. ncbi Self-Initiated Surface Graft Polymerization of 2-Methacryloyloxyethyl Phosphorylcholine on Poly(ether ether ketone) by Photoirradiation
    Masayuki Kyomoto
    Research Department, Japan Medical Materials Corporation, 3 3 31 Miyahara, Yodogawa ku, Osaka 532 0003, Japan, and Department of Materials Engineering, School of Engineering, Division of Science for Joint Reconstruction, School of Medicine, and Center for NanoBio Integration, The University of Tokyo, 7 3 1 Hongo, Bunkyo ku, Tokyo 113 8656, Japan
    ACS Appl Mater Interfaces 1:537-42. 2009
    ..The poly(MPC)-grafted PEEK surface fabricated by a novel and simple polymerization system exhibited unique characteristics such as high wettability and high antiprotein adsorption, which makes it highly suitable for medical applications...
  24. ncbi Bioactive PMMA bone cement prepared by modification with methacryloxypropyltrimethoxysilane and calcium chloride
    Toshiki Miyazaki
    Graduate School of Materials Science, Nara Institute of Science and Technology NAIST, 8916 5, Takayama cho, Ikoma shi, Nara 630 0192, Japan
    J Biomed Mater Res A 67:1417-23. 2003
    ..Bioactive bone cement is successfully obtained when it contains appropriate concentrations of alkoxysilane and calcium chloride...
  25. ncbi Wear and toughness of crosslinked polyethylene for total knee replacements: a study using a simulator and small-punch testing
    Masao Akagi
    Department of Orthopaedic Surgery, Kinki University School of Medicine, 377 2 Ohno Higashi, Osaka Snyama City, Osaka 589 8511, and Department of Orthopaedic Surgery, Fukui Red Cross Hospital, Fukui, Japan
    J Orthop Res 24:2021-7. 2006
    ....
  26. ncbi Wear of highly cross-linked polyethylene acetabular cup in Japan
    Hironobu Oonishi
    H Oonishi Memorial Joint Replacement Institute, Tominaga Hospital, Osaka City, Japan
    J Arthroplasty 21:944-9. 2006
    ..006 mm/y. The extent of decrease in clinical wear of 6.0-Mrad polyethylene (Aeonian, Kyocera Corp, Kyoto, Japan) cups is comparable with the decrease of the in vitro wear measured by the hip simulation test...
  27. ncbi Antidegenerative effects of partial disc replacement in an animal surgery model
    Kazutaka So
    Department of Orthopaedic Surgery, Graduate School of Medicine, Kyoto University, Japan
    Spine (Phila Pa 1976) 32:1586-91. 2007
    ..In vivo degenerative changes of rabbit intervertebral discs after partial disc replacements were evaluated radiologically and histologically in a controlled trial...