title: Corrosion behaviour of commercially pure titanium shot blasted with different materials and sizes of shot particles for dental implant applications.
abstract: It is well known that the osseointegration of the commercially pure titanium (c.p. Ti) dental implant is improved when the metal is shot blasted in order to increase its surface roughness. This roughness is colonised by bone, which improves implant fixation. However, shot blasting also changes the chemical composition of the implant surface because some shot particles remain adhered on the metal. The c.p. Ti surfaces shot blasted with different materials and sizes of shot particles were tested in order to determine their topographical features (surface roughness, real surface area and the percentage of surface covered by the adhered shot particles) and electrochemical behaviour (open circuit potential, electrochemical impedance spectroscopy and cyclic polarisation). The results demonstrate that the increased surface area of the material because of the increasing surface roughness is not the only cause for differences found in the electrochemical behaviour and corrosion resistance of the blasted c.p. Ti. Among other possible causes, those differences may be attributed to the compressive residual surface stresses induced by shot blasting. All the materials tested have an adequate corrosion and electrochemical behaviour in terms of its possible use as dental implant material.
authors.affiliation: Research Centre in Biomedical Engineering (CREB), Department of Materials Science and Metallurgical Engineering, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain. conrado.aparicio@upc.es
authors.forename: Conrado
authors.initials: C
authors.lastname: Aparicio
authors.forename: F Javier
authors.initials: FJ
authors.lastname: Gil
authors.forename: Carlos
authors.initials: C
authors.lastname: Fonseca
authors.forename: Mario
authors.initials: M
authors.lastname: Barbosa
authors.forename: Josep Anton
authors.initials: JA
authors.lastname: Planell
mesh_terms: D003343:Corrosion; D015921:Dental Implants; D004563:Electrochemistry; D008422:Materials Testing; D014025:Titanium / Q000737:chemistry*
chemical_list: D015921:Dental Implants; D014025:Titanium