Seigo Okawa

Summary

Affiliation: Niigata University
Country: Japan

Publications

  1. ncbi request reprint Calcium phosphates deposited on titanium electrode surface--part 1: Effect of the electrode polarity and oxide film on the deposited materials
    Seigo Okawa
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Chuo Ku, Niigata, Japan
    Dent Mater J 32:281-8. 2013
  2. ncbi request reprint Surface properties of electrochemically buffed titanium casting
    Seigo Okawa
    Division of Dental Biomaterial Science, Niigata University Graduate School of Medical and Dental Sciences, Gakkoucho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater J 23:504-11. 2004
  3. ncbi request reprint Chemical mechanical polishing of titanium with colloidal silica containing hydrogen peroxide--mirror polishing and surface properties
    Seigo Okawa
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, 5274 Gakkocho dori 2, Chuo Ku, Niigata 951 8514, Japan
    Dent Mater J 28:68-74. 2009
  4. ncbi request reprint Characterization of calcium phosphate deposited on valve metal by anodic oxidation with polarity inversion
    Seigo Okawa
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
    Dent Mater J 28:513-8. 2009
  5. ncbi request reprint Surface texture and composition of titanium brushed with toothpaste slurries of different pHs
    Awlad Hossain
    Division of Biomaterial Science, Graduate School of Medical and Dental Sciences, Niigata University, Gakkoucho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater 23:186-92. 2007
  6. ncbi request reprint Surface analysis of commercially pure titanium implant retrieved from rat bone. Part 1: initial biological response of sandblasted surface
    Kouichi Watanabe
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, 5274 Gakkoucho dori 2, Chuo Ku, Niigata 951 8514, Japan
    Dent Mater J 28:178-84. 2009
  7. ncbi request reprint Morphological and chemical analysis of different precipitates on mineral trioxide aggregate immersed in different fluids
    Linlin Han
    Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, 5274 Gakkocho dori, 2 Ban cho, Chuo Ku, Niigata 951 8514, Japan
    Dent Mater J 29:512-7. 2010
  8. ncbi request reprint Surface composition and texture of titanium polished with colloidal silica suspension and chromic oxide slurry
    Awlad Hossain
    Division of Biomaterial Science, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Gakkocho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater J 24:409-13. 2005
  9. ncbi request reprint Effect of toothbrushing on titanium surface: an approach to understanding surface properties of brushed titanium
    Awlad Hossain
    Division of Dental Biomaterial Science, Graduate School of Medical and Dental Sciences, Niigata University, Gakkoucho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater 22:346-52. 2006
  10. ncbi request reprint Abrading increases oxygen and hardness of titanium surface
    Osamu Miyakawa
    Division of Biomaterial Science, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Japan
    Dent Mater J 25:13-9. 2006

Collaborators

Detail Information

Publications11

  1. ncbi request reprint Calcium phosphates deposited on titanium electrode surface--part 1: Effect of the electrode polarity and oxide film on the deposited materials
    Seigo Okawa
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Chuo Ku, Niigata, Japan
    Dent Mater J 32:281-8. 2013
    ..This characteristic of the oxide film and the electrolysis conditions were related to the behavior of the deposition of ultra fine HAp with high crystallinity...
  2. ncbi request reprint Surface properties of electrochemically buffed titanium casting
    Seigo Okawa
    Division of Dental Biomaterial Science, Niigata University Graduate School of Medical and Dental Sciences, Gakkoucho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater J 23:504-11. 2004
    ..At higher potentials, reaction products might be dissolved anodically, so that the surface was chemically clean to some extent. The surface also became rich in OH-...
  3. ncbi request reprint Chemical mechanical polishing of titanium with colloidal silica containing hydrogen peroxide--mirror polishing and surface properties
    Seigo Okawa
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, 5274 Gakkocho dori 2, Chuo Ku, Niigata 951 8514, Japan
    Dent Mater J 28:68-74. 2009
    ..Results of this study showed that CMP using colloidal silica containing H2O2 successfully created a mirror-polished surface without contaminated and reacted layers...
  4. ncbi request reprint Characterization of calcium phosphate deposited on valve metal by anodic oxidation with polarity inversion
    Seigo Okawa
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
    Dent Mater J 28:513-8. 2009
    ..Deposits with nano-grain size were observed by AFM. The results confirmed that CAP with nano-grain size was deposited on valve metals by the anodic oxidation with polarity inversion...
  5. ncbi request reprint Surface texture and composition of titanium brushed with toothpaste slurries of different pHs
    Awlad Hossain
    Division of Biomaterial Science, Graduate School of Medical and Dental Sciences, Niigata University, Gakkoucho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater 23:186-92. 2007
    ..This in vitro study characterized the surface texture and composition of titanium brushed with toothpaste slurries of different pHs, and thereby elucidated mechanochemical interactions between the metal and abrasive material in dentifrice...
  6. ncbi request reprint Surface analysis of commercially pure titanium implant retrieved from rat bone. Part 1: initial biological response of sandblasted surface
    Kouichi Watanabe
    Division of Biomaterial Science, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, 5274 Gakkoucho dori 2, Chuo Ku, Niigata 951 8514, Japan
    Dent Mater J 28:178-84. 2009
    ..Furthermore, no correlation was found between the Ca and P distributions in the element maps. In conclusion, no calcium phosphate compounds were formed on the implant in vivo after 7 days...
  7. ncbi request reprint Morphological and chemical analysis of different precipitates on mineral trioxide aggregate immersed in different fluids
    Linlin Han
    Division of Cariology, Operative Dentistry and Endodontics, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, 5274 Gakkocho dori, 2 Ban cho, Chuo Ku, Niigata 951 8514, Japan
    Dent Mater J 29:512-7. 2010
    ..In conclusion, the precipitates formed on DW specimens were identified as calcium carbonate and calcium hydroxide primarily, whereas the precipitates on PBS specimens were inferred to be amorphous calcium phosphate...
  8. ncbi request reprint Surface composition and texture of titanium polished with colloidal silica suspension and chromic oxide slurry
    Awlad Hossain
    Division of Biomaterial Science, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Gakkocho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater J 24:409-13. 2005
    ..In addition, the level of oxygen concentration was noticeably raised, which probably resulted from the increase of surface oxide film thickness or the extension of oxide-to-metal transition zone...
  9. ncbi request reprint Effect of toothbrushing on titanium surface: an approach to understanding surface properties of brushed titanium
    Awlad Hossain
    Division of Dental Biomaterial Science, Graduate School of Medical and Dental Sciences, Niigata University, Gakkoucho dori 2 5274, Niigata 951 8514, Japan
    Dent Mater 22:346-52. 2006
    ..This in vitro study aimed to characterize the surface morphology and composition of tooth-brushed titanium casting and thereby to elucidate interactions between the metal and abrasive material in dentifrice...
  10. ncbi request reprint Abrading increases oxygen and hardness of titanium surface
    Osamu Miyakawa
    Division of Biomaterial Science, Course for Oral Life Science, Niigata University Graduate School of Medical and Dental Sciences, Japan
    Dent Mater J 25:13-9. 2006
    ..In conclusion, abrading with a coarse grit led to accumulation of a high, non-uniform strain in the titanium substrate, thereby hardening the surface further...
  11. ncbi request reprint Morphological and chemical characterizations of the interface of a hydroxyapatite-coated implant
    Kiichirou Mimura
    Mimura Dental Clinic, Fujinomiya, Shizuoka, Japan
    Dent Mater J 23:353-60. 2004
    ..Analysis showed diffusion of Ca into the metal substrate, hence indicating the presence of chemical bond at the interface. However, mechanical interlocking seemed to play the major role in the interfacial bond...