title: Texturing of titanium (Ti6Al4V) medical implant surfaces with MHz-repetition-rate femtosecond and picosecond Yb-doped fiber lasers.
abstract: We propose and demonstrate the use of short pulsed fiber lasers in surface texturing using MHz-repetition-rate, microjoule- and sub-microjoule-energy pulses. Texturing of titanium-based (Ti6Al4V) dental implant surfaces is achieved using femtosecond, picosecond and (for comparison) nanosecond pulses with the aim of controlling attachment of human cells onto the surface. Femtosecond and picosecond pulses yield similar results in the creation of micron-scale textures with greatly reduced or no thermal heat effects, whereas nanosecond pulses result in strong thermal effects. Various surface textures are created with excellent uniformity and repeatability on a desired portion of the surface. The effects of the surface texturing on the attachment and proliferation of cells are characterized under cell culture conditions. Our data indicate that picosecond-pulsed laser modification can be utilized effectively in low-cost laser surface engineering of medical implants, where different areas on the surface can be made cell-attachment friendly or hostile through the use of different patterns.
authors.affiliation: Materials Science and Nanotechnology Graduate Program, Bilkent University, Ankara 06800, Turkey. mutlu@bilkent.edu.tr
authors.forename: Mutlu
authors.initials: M
authors.lastname: Erdoğan
authors.forename: Bülent
authors.initials: B
authors.lastname: Öktem
authors.forename: Hamit
authors.initials: H
authors.lastname: Kalaycıoğlu
authors.forename: Seydi
authors.initials: S
authors.lastname: Yavaş
authors.forename: Pranab K
authors.initials: PK
authors.lastname: Mukhopadhyay
authors.forename: Koray
authors.initials: K
authors.lastname: Eken
authors.forename: Kıvanç
authors.initials: K
authors.lastname: Ozgören
authors.forename: Yaşar
authors.initials: Y
authors.lastname: Aykaç
authors.forename: Uygar H
authors.initials: UH
authors.lastname: Tazebay
authors.forename: F Ömer
authors.initials: FÖ
authors.lastname: Ilday
mesh_terms: D000162:Acoustics; D000497:Alloys; D001672:Biocompatible Materials; D002448:Cell Adhesion; D002454:Cell Differentiation; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D004867:Equipment Design; D006801:Humans; D007834:Lasers; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods; D055095:Optics and Photonics; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry
chemical_list: D000497:Alloys; D001672:Biocompatible Materials; C031462:titanium alloy (TiAl6V4); D014025:Titanium; D015018:Ytterbium