title: Evaluation of Antibacterial Activity of Titanium Surface Modified by PVD/PACVD Process.
abstract: The aim of this study was to evaluate the response of Streptococcus mutans (S. mutans) via crystal violet staining assay on titanium surface modified by physical vapor deposition/plasma assisted chemical vapor deposition process. Specimens were divided into the following three groups: polished titanium (control group), titanium modified by DC magnetron sputtering (group TiN-Ti), and titanium modified by plasma nitriding (group N-Ti). Surface characteristics of specimens were observed by using nanosurface 3D optical profiler and field emission scanning electron microscope. Group TiN-Ti showed TiN layer of 1.2 microm in thickness. Group N-Ti was identified as plasma nitriding with X-ray photoelectron spectroscopy. Roughness average (Ra) of all specimens had values < or = 0.2 microm (the threshold Ra), which had no effect on bacterial adhesion. No significant difference of S. mutans adhesion was found between the surfaces of control, TiN-Ti, and N-Ti (P > 0.05). Within the process condition of this study, modified titanium surfaces by DC magnetron sputtering and plasma nitriding did not influence the adhesion of S. mutans.
authors.forename: Min-Kyung
authors.initials: MK
authors.lastname: Ji
authors.forename: Min-Joo
authors.initials: MJ
authors.lastname: Lee
authors.forename: Sang-Won
authors.initials: SW
authors.lastname: Park
authors.forename: Kwangmin
authors.initials: K
authors.lastname: Lee
authors.forename: Kwi-Dug
authors.initials: KD
authors.lastname: Yun
authors.forename: Hyun-Seung
authors.initials: HS
authors.lastname: Kim
authors.forename: Gye-Jeong
authors.initials: GJ
authors.lastname: Oh
authors.forename: Ji-Hyun
authors.initials: JH
authors.lastname: Kim
authors.forename: Hyun-Pil
authors.initials: HP
authors.lastname: Lim
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry*; D058626:Plasma Gases / Q000737:chemistry*; D013295:Streptococcus mutans / Q000254:growth & development*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D058626:Plasma Gases; D014025:Titanium