title: Attachment and growth behaviour of human gingival fibroblasts on titanium and zirconia ceramic surfaces.
abstract: The attachment, growth behaviour and the genetic effect of human gingival fibroblasts (HGF) cultured on titanium and different zirconia surfaces were investigated. HGF cells were cultured on (1) titanium discs with a machined surface, (2) yttrium-stabilized tetragonal zirconia polycrystals (Y-TZP) with a smooth surface and (3) Y-TZP with 100 microm grooves. The cell proliferation activity was evaluated through a MTT assay at 24 h and 48 h, and the cell morphology was examined by SEM. The mRNA expression of integrin-beta1, type I and III collagen, laminin and fibronectin in HGF were evaluated by RT-PCR after 24 h. From the MTT assay, the mean optical density values for the titanium and grooved zirconia surfaces after 48 h of HGF adhesion were greater than the values obtained for the smooth zirconia surfaces. SEM images showed that more cells were attached to the grooves, and the cells appeared to follow the direction of the grooves. The results of RT-PCR suggest that all groups showed comparable fibroblast-specific gene expression. A zirconia ceramic surface with grooves showed biological responses that were comparable to those obtained with HGF on a titanium surface.
authors.affiliation: Department of Prosthodontics, School of Dentistry, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Korea. ahranp@hotmail.com
authors.forename: Ahran
authors.initials: A
authors.lastname: Pae
authors.forename: Heesu
authors.initials: H
authors.lastname: Lee
authors.forename: Hyeong-Seob
authors.initials: HS
authors.lastname: Kim
authors.forename: Yong-Dae
authors.initials: YD
authors.lastname: Kwon
authors.forename: Yi-Hyung
authors.initials: YH
authors.lastname: Woo
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D002448:Cell Adhesion; D002454:Cell Differentiation; D049109:Cell Proliferation; D002478:Cells, Cultured; D002516:Ceramics / Q000737:chemistry*; D005347:Fibroblasts / Q000166:cytology* / Q000378:metabolism; D005881:Gingiva / Q000166:cytology*; D006801:Humans; D008855:Microscopy, Electron, Scanning; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013499:Surface Properties; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D001672:Biocompatible Materials; D015040:Zirconium; D014025:Titanium