Effect of zeta potentials on bovine serum albumin adsorption on crown composite resin surfaces in vitro - Journal of Biomedical Science and Engineering

JBiSE > Vol.6 No.3, March 2013

Journal of Biomedical Science and Engineering

Volume 6, Issue 3 (March 2013)

ISSN Print: 1937-6871 ISSN Online: 1937-688X

Google-based Impact Factor: 1.68 Citations

Effect of zeta potentials on bovine serum albumin adsorption on crown composite resin surfaces in vitro ()

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Download as PDF (Size: 202KB) PP. 273-276

DOI: 10.4236/jbise.2013.63034 4,879 Downloads 7,452 Views Citations

Author(s)

Nahoko Miyake, Tadashi Miura, Toru Sato, Masao Yoshinari

Affiliation(s)

Department of Crown & Bridge Prosthodontics, Tokyo Dental College, Chiba, Japan.
Division of Oral Implants Research, Oral Health Science Center, Tokyo Dental College, Chiba, Japan.
Division of Prosthodontics, Department of Clinical Oral Health Science, Tokyo Dental College, Tokyo, Japan.

ABSTRACT

We previously studied the mechanism underlying the adsorption of oral bacteria on the surfaces of dental prosthetic materials such as ceramics and resins in vitro. The aim of the present study was to examine bovine serum albumin (BSA) adsorption on crown composite resin surfaces by means of zeta potential. We measured the zeta potentials of resins alone, BSA alone, and resins after BSA adsorption. Eight resins were pulverized into powders (300 - 1000 nm). All experiments were conducted in 10 mM sodium chloride solution (pH 6.5). BSA was dissolved in 10 mM NaCl with a concentration of 2.0 × 10^-5 mol/l. An adsorption assay was performed for one hour at 37°C under continuous rotation (6 rpm). The zeta potentials of both resins and BSA were negative, with BSA itself less negative than the resins themselves as an absolute value (p < 0.0001). The zeta potentials of seven resin surfaces after BSA adsorption were significantly less negative than were those of the resins without BSA adsorption (p < 0.0001). Eight resins were divided into two classes based on the size of the surface potential difference between each resin and the BSA. The difference in surface potential between the resins and the BSA were small, leading to the theory that particles with identical charges repulse each other, and the amounts of adsorbed BSA on these resins might be less. On the other, when the differences between the other resins and BSA are large, so that the repulsive force between two nonidentical particles becomes zero and an attractive force might be generated, then more BSA might be adsorbed on those resins. Therefore, the zeta potentials were affected by BSA adsorption and became less negative. These results suggested that electrostatic interactions play an important role in the adsorption of BSA on resin surfaces.

KEYWORDS

Zeta Potential; Crown Composite Resins; Bovine Serum Albumin; Adsorption; Electrostatic Interactions

Share and Cite:

Miyake, N. , Miura, T. , Sato, T. and Yoshinari, M. (2013) Effect of zeta potentials on bovine serum albumin adsorption on crown composite resin surfaces in vitro. Journal of Biomedical Science and Engineering, 6, 273-276. doi: 10.4236/jbise.2013.63034.

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