title: Influence of surface modifications to titanium on oral bacterial adhesion in vitro.
abstract: The influence of surface modifications to titanium on the initial adherence of Porphyromonas gingivalis ATCC33277 and Actinobacillus actinomycetemcomitans ATCC43718 was evaluated. Surface modifications were performed with dry processes including ion implantation (Ca(+), N(+), F(+)), oxidation (anode oxidation, titania spraying), ion plating (TiN, alumina), and ion beam mixing (Ag, Sn, Zn, Pt) with Ar(+) on polished pure titanium plates. Comparatively large amounts of P. gingivalis and A. actinomycetemcomitans adhered to polished titanium plates. The degree of P. gingivalis adhesion showed a positive correlation with surface energy and the amount of calcium-ion adsorption. Adherence of both P. gingivalis and A. actinomycetemcomitans increased on calcium-implanted surfaces compared with polished titanium surfaces, whereas adherence of P. gingivalis was remarkably decreased on alumina-coated surfaces. These findings indicate that titanium implants exposed to the oral cavity require surface modification to inhibit the adherence of oral bacteria, and that surface modification with a dry process is useful in controlling the adhesion of oral bacteria as well as ensuring resistance against wear.
authors.affiliation: Department of Dental Materials Science, Oral Health Science Center, Tokyo Dental College, 1-2-2, Masago, Mihamaku, Chiba 261-8502, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yoshinari
authors.forename: Y
authors.initials: Y
authors.lastname: Oda
authors.forename: T
authors.initials: T
authors.lastname: Kato
authors.forename: K
authors.initials: K
authors.lastname: Okuda
authors.forename: A
authors.initials: A
authors.lastname: Hirayama
mesh_terms: D016976:Aggregatibacter actinomycetemcomitans; D001422:Bacterial Adhesion; D003764:Dental Materials; D006801:Humans; D009909:Oral Health; D016966:Porphyromonas gingivalis; D013499:Surface Properties; D014025:Titanium
chemical_list: D003764:Dental Materials; D014025:Titanium