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Osteoblast Precursor Cell Attachment on Heat-treated Calcium Phosphate Coatings

¹ University of Texas Health Science Center at San Antonio, Department of Restorative Dentistry, Division of Biomaterials, MSC 7890, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900;
² Mississippi State University, Department of Agricultural and Biological Engineering, Box 9632, Mississippi State, MS 39762;
³ University of Texas Health Science Center at San Antonio, Department of Periodontics, MSC 7894, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900; and
⁴ University of Texas Health Science Center at San Antonio, Center for Clinical Bioengineering, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900;

View larger version (25K): [in this window] [in a new window]   Figure 1. Structural and compositional analysis of CaP coatings of different treatments. (A) Representative x-ray diffraction analyses of as-sputtered Ca coatings, 400°C heat-treated CaP coatings, and 600°C heat-treated CaP coatings. (B) Representative high-resolution O 1s spectra of CaP-coated surfaces by x-ray photoelectron spectroscopy. The O 1s were curve-fitted showing two peaks at 532 eV and 531 eV.

View larger version (42K): [in this window] [in a new window]   Figure 2. HEPM cell attachment on heat-treated CaP coatings. Data were expressed as the mean ± SD (n = 6). Asterisk (*) indicated significant difference (p < 0.001).

View larger version (117K): [in this window] [in a new window]   Figure 3. Representative SEM micrographs of attached cell morphology on: (A) control Ti surfaces (X4000), (B) as-sputtered CaP coatings (X4000), (C) 400C heat-treated CaP coatings (X2500), and (D) 600°C heat-treated CaP coatings (X4000). Representative SEM micrographs displaying dividing cells on: (E) control Ti surfaces (X2500), (F) as-depostied CaP coatings (X900), (G) 400°C heat-treated CaP coatings (X2500), and (H) 600°C heat-treated CaP coatings (X2500). Damaged cells were observed on as-sputtered CaP coatings. Bar = 5 µm.

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