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- 저자 : Kajihara Hiroyuki (검색결과 4 건)
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Yumiko Okumura,Toshiki Kajihara,Yumiko Koba,Makoto Onodera,Toshinori Hara,Hiroyuki Tahara,Hideki Ohdan,Hiroki Ohge,Michiya Yokozaki,Motoyuki Sugai 대한진단검사의학회 2018 Annals of Laboratory Medicine Vol.38 No.4
Dear Editor, Mycoplasma hominis is a member of the common urogenital flora with the potential to cause genital and extragenital infections, the latter of which mainly occur in immunocompromised hosts [1]. M. hominis is frequently associated with post-transplant infection in extragenital cases. To expand our knowledge about post-transplant Mycoplasma infection of immunocompromised hosts, we report a case of M. hominis infection causing multiple abscesses around the pancreas graft after simultaneous pancreas-kidney transplantation in a patient with diabetes. Because this report is not a clinical trial/research, an approval from the Institutional Review Board was exempted.
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Effect of metal conditioner on bonding of porcelain to cobalt-chromium alloy
Minesaki, Yoshito,Murahara, Sadaaki,Kajihara, Yutaro,Takenouchi, Yoshihisa,Tanaka, Takuo,Suzuki, Shiro,Minami, Hiroyuki The Korean Academy of Prosthodonitics 2016 The Journal of Advanced Prosthodontics Vol.8 No.1
PURPOSE. The purpose of this study was to evaluate the efficacy of two different metal conditioners for non-precious metal alloys for the bonding of porcelain to a cobalt-chromium (Co-Cr) alloy. MATERIALS AND METHODS. Disk-shaped specimens ($2.5{\times}10.0mm$) were cast with Co-Cr alloy and used as adherend materials. The bonding surfaces were polished with a 600-grid silicon carbide paper and airborne-particle abraded using $110{\mu}m$ alumina particles. Bonding specimens were fabricated by applying and firing either of the metal conditioners on the airborne-particle abraded surface, followed by firing porcelain into 5 mm in diameter and 3 mm in height. Specimens without metal conditioner were also fabricated. Shear bond strength for each group (n=8) were measured and compared (${\alpha}=.05$). Sectional view of bonding interface was observed by SEM. EDS analysis was performed to determine the chemical elements of metal conditioners and to determine the failure modes after shear test. RESULTS. There were significant differences among three groups, and two metal conditioner-applied groups showed significantly higher values compared to the non-metal conditioner group. The SEM observation of the sectional view at bonding interface revealed loose contact at porcelain-alloy surface for non-metal conditioner group, however, close contact at both alloy-metal conditioner and metal conditioner-porcelain interfaces for both metal conditioner-applied groups. All the specimens showed mixed failures. EDS analysis showed that one metal conditioner was Si-based material, and another was Ti-based material. Si-based metal conditioner showed higher bond strengths compared to the Ti-based metal conditioner, but exhibited more porous failure surface failure. CONCLUSION. Based on the results of this study, it can be stated that the application of metal conditioner is recommended for the bonding of porcelain to cobalt-chromium alloys.
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Effect of metal conditioner on bonding of porcelain to cobalt-chromium alloy
Yoshito Minesaki,Sadaaki Murahara,Yutaro Kajihara,Yoshihisa Takenouchi,Takuo Tanaka,Shiro Suzuki,Hiroyuki Minami 대한치과보철학회 2016 The Journal of Advanced Prosthodontics Vol.8 No.1
PURPOSE The purpose of this study was to evaluate the efficacy of two different metal conditioners for non-precious metal alloys for the bonding of porcelain to a cobalt-chromium (Co-Cr) alloy. MATERIALS AND METHODS Disk-shaped specimens (2.5×10.0 mm) were cast with Co-Cr alloy and used as adherend materials. The bonding surfaces were polished with a 600-grid silicon carbide paper and airborne-particle abraded using 110 µm alumina particles. Bonding specimens were fabricated by applying and firing either of the metal conditioners on the airborne-particle abraded surface, followed by firing porcelain into 5 mm in diameter and 3 mm in height. Specimens without metal conditioner were also fabricated. Shear bond strength for each group (n=8) were measured and compared (α=.05). Sectional view of bonding interface was observed by SEM. EDS analysis was performed to determine the chemical elements of metal conditioners and to determine the failure modes after shear test. RESULTS There were significant differences among three groups, and two metal conditioner-applied groups showed significantly higher values compared to the non-metal conditioner group. The SEM observation of the sectional view at bonding interface revealed loose contact at porcelain-alloy surface for non-metal conditioner group, however, close contact at both alloy-metal conditioner and metal conditioner-porcelain interfaces for both metal conditioner-applied groups. All the specimens showed mixed failures. EDS analysis showed that one metal conditioner was Si-based material, and another was Ti-based material. Si-based metal conditioner showed higher bond strengths compared to the Ti-based metal conditioner, but exhibited more porous failure surface failure. CONCLUSION Based on the results of this study, it can be stated that the application of metal conditioner is recommended for the bonding of porcelain to cobalt-chromium alloys.
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