Journal of Periodontal and Implant Science

  • 제42권3호
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  • Pages.81-87
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  • 2012
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  • 2093-2278(pISSN)
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  • 2093-2286(eISSN)
대한치주과학회 (Korean Academy of Periodontology)
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Surface characteristics of thermally treated titanium surfaces

  • Lee, Yang-Jin (Department of Periodontology, Dental Science Research Institute, Chonnam National University School of Dentistry) ;
  • Cui, De-Zhe (Dental Hospital, Yanbian Medical University) ;
  • Jeon, Ha-Ra (Department of Periodontology, Dental Science Research Institute, Chonnam National University School of Dentistry) ;
  • Chung, Hyun-Ju (Department of Periodontology, Dental Science Research Institute, Chonnam National University School of Dentistry) ;
  • Park, Yeong-Joon (Department of Dental Materials, Dental Science Research Institute, Chonnam National University School of Dentistry) ;
  • Kim, Ok-Su (Department of Periodontology, Dental Science Research Institute, Chonnam National University School of Dentistry) ;
  • Kim, Young-Joon (Department of Periodontology, Dental Science Research Institute, Chonnam National University School of Dentistry)
  • 투고 : 2012.02.17
  • 심사 : 2012.05.13
  • 발행 : 2012.06.30
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초록

Purpose: The characteristics of oxidized titanium (Ti) surfaces varied according to treatment conditions such as duration time and temperature. Thermal oxidation can change Ti surface characteristics, which affect many cellular responses such as cell adhesion, proliferation, and differentiation. Thus, this study was conducted to evaluate the surface characteristics and cell response of thermally treated Ti surfaces. Methods: The samples were divided into 4 groups. Control: machined smooth titanium (Ti-S) was untreated. Group I: Ti-S was treated in a furnace at $300^{\circ}C$ for 30 minutes. Group II: Ti-S was treated at $500^{\circ}C$ for 30 minutes. Group III: Ti-S was treated at $750^{\circ}C$ for 30 minutes. A scanning electron microscope, atomic force microscope, and X-ray diffraction were used to assess surface characteristics and chemical composition. The water contact angle and surface energy were measured to assess physical properties. Results: The titanium dioxide ($TiO_2$) thickness increased as the treatment temperature increased. Additional peaks belonging to rutile $TiO_2$ were only found in group III. The contact angle in group III was significantly lower than any of the other groups. The surface energy significantly increased as the treatment temperature increased, especially in group III. In the 3-(4,5-Dimethylthiazol- 2-yl)-2,5-diphenyltetrazolium bromide assay, after 24 hours of incubation, the assessment of cell viability showed that the optical density of the control had a higher tendency than any other group, but there was no significant difference. However, the alkaline phosphatase activity increased as the temperature increased, especially in group III. Conclusions: Consequently, the surface characteristics and biocompatibility increased as the temperature increased. This indicates that surface modification by thermal treatment could be another useful method for medical and dental implants.

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