title: Useful surface parameters for biomaterial discrimination.
abstract: Topographical features of biomaterials' surfaces are determinant when addressing their application site. Unfortunately up to date there has not been an agreement regarding which surface parameters are more representative in discriminating between materials. Discs (n = 16) of different currently used materials for implant prostheses fabrication, such as cast cobalt-chrome, direct laser metal soldered (DLMS) cobalt-chrome, titanium grade V, zirconia (Y-TZP), E-glass fiber-reinforced composite and polyetheretherketone (PEEK) were manufactured. Nanoscale topographical surface roughness parameters generated by atomic force microscopy (AFM), microscale surface roughness parameters obtained by white light interferometry (WLI) and water angle values obtained by the sessile-water-drop method were analyzed in order to assess which parameter provides the best optimum surface characterization method. Correlations between nanoroughness, microroughness, and hydrophobicity data were performed to achieve the best parameters giving the highest discriminatory power. A subset of six parameters for surface characterization were proposed. AFM and WLI techniques gave complementary information. Wettability did not correlate with any of the nanoroughness parameters while it however showed a weak correlation with microroughness parameters.
authors.affiliation: Doctoral Student, Department of Dentistry and Department of Pathology and Experimental Therapeutics, Dentistry School, University of Barcelona, Barcelona, Spain.
authors.forename: Marina
authors.initials: M
authors.lastname: Etxeberria
authors.affiliation: Associate Professor, Laboratory of Prosthetic Dentistry, Dentistry School, University of Barcelona, Barcelona, Spain.
authors.forename: Tomas
authors.initials: T
authors.lastname: Escuin
authors.affiliation: Department of Pathology and Experimental Therapeutics, Medical and Dentistry Schools, University of Barcelona, Barcelona, Spain.
authors.forename: Miquel
authors.initials: M
authors.lastname: Vinas
authors.affiliation: Department of Public Health, Medical School, University of Barcelona, Barcelona, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Ascaso
mesh_terms: D001672:Biocompatible Materials / Q000032:analysis* / Q000145:classification*; D057927:Hydrophobic and Hydrophilic Interactions; D007368:Interferometry; D008422:Materials Testing / Q000379:methods*; D018625:Microscopy, Atomic Force; D013499:Surface Properties
chemical_list: D001672:Biocompatible Materials
keywords: AFM; biomaterial; surface characterization; wettability; white light interferometry