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Anode Glow Discharge Plasma Treatment Enhances Calcium Phosphate Adsorption onto Titanium Plates

Department of Oral Biomaterials and Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan;

View larger version (18K): [in this window] [in a new window]   Figure 1. XPS high-resolution spectra of specimens with and without GDP. (1) Without GDP, (2) GDP+, (3) GDP-. (A) High-resolution spectra of Ti2p. (B) High-resolution spectra of O1s. (C) High-resolution spectra of C1s.

View larger version (21K): [in this window] [in a new window]   Figure 2. The contact angles of the specimens. The contact angles of the specimens to pure distilled water were measured by a sessile drop technique. Error bars indicate the mean + standard deviation (SD) of six specimens (n = 6). The findings were analyzed statistically by ANOVA. Significant differences were considered to exist when p < 0.01.

View larger version (29K): [in this window] [in a new window]   Figure 3. Time-course of inorganic adsorption onto the specimens. (A) Relative concentrations of titanium on the specimens. (B) Relative concentrations of oxygen on the specimens. (C) Relative concentrations of carbon on the specimens. (D) Relative concentrations of phosphorus on the specimens. (E) Relative concentrations of calcium on the specimens. (F) Relative concentrations of sodium on the specimens. Error bars indicate the mean + standard deviation (SD) of six specimens (n = 6). The time-course of each specimen and the findings of individual groups were analyzed statistically by ANOVA. Significant differences were considered to exist when p < 0.01.

View larger version (16K): [in this window] [in a new window]   Figure 4. C1s signal on the GDP specimens after 1 hr of immersion. The three peaks in the curve fit of the C1s signal on the GDP specimens after 1 hr of immersion. Peak 1 is set at 285.0 eV for -H2-, Peak 2 at 286.5 eV for -C-N-, and Peak 3 at 288 eV for -C=O-. (A) The three peaks of the curve fit of the C1s signal on the GDP+ specimens. (B) The three peaks of the curve fit of the C1s signal on the GDP- specimens.

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