title: Laser surface modification for synthesis of textured bioactive and biocompatible Ca-P coatings on Ti-6Al-4V.
abstract: A textured calcium phosphate based bio-ceramic coating was synthesized by continuous wave Nd:YAG laser induced direct melting of hydroxyapatite precursor on Ti-6Al-4V substrate. Two different micro-textured patterns (100 μm and 200 μm line spacing) of Ca-P based phases were fabricated by this technique to understand the alignment and focal adhesion of the bone forming cells on these surfaces. X-ray diffraction studies of the coated samples indicated the presence of CaTiO₃, α-Ca₃(PO₄)₂, Ca(OH)₂, TiO₂ (anatase) and TiO₂ (rutile) phases as a result of the intermixing between the precursor and substrate material during laser processing. A two dimensional elemental mapping of the cross-section of the coated samples exhibited the presence of higher phosphorous concentration within the coating and a thin layer of calcium concentration only at the top of the coating. Improved in vitro bioactivity and in vitro biocompatibility was observed for the laser processed samples as compared to the control.
authors.affiliation: Department of Materials Science and Engineering, University of North Texas, Denton, TX 76207, USA.
authors.forename: Sameer R
authors.initials: SR
authors.lastname: Paital
authors.forename: Nancy
authors.initials: N
authors.lastname: Bunce
authors.forename: Peeyush
authors.initials: P
authors.lastname: Nandwana
authors.forename: Chinmay
authors.initials: C
authors.lastname: Honrao
authors.forename: Soumya
authors.initials: S
authors.lastname: Nag
authors.forename: Wei
authors.initials: W
authors.lastname: He
authors.forename: Rajarshi
authors.initials: R
authors.lastname: Banerjee
authors.forename: Narendra B
authors.initials: NB
authors.lastname: Dahotre
mesh_terms: D000497:Alloys; D000818:Animals; D002130:Calcium Phosphates / Q000737:chemistry* / Q000494:pharmacology; D002448:Cell Adhesion / Q000187:drug effects; D048430:Cell Shape / Q000187:drug effects; D002478:Cells, Cultured; D020099:Coated Materials, Biocompatible / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology / Q000528:radiation effects*; D003599:Cytoskeleton / Q000187:drug effects / Q000378:metabolism / Q000502:physiology; D004595:Electroplating / Q000295:instrumentation / Q000379:methods*; D007834:Lasers; D008422:Materials Testing / Q000379:methods; D051379:Mice; D008855:Microscopy, Electron, Scanning; D010006:Osteoblasts / Q000187:drug effects / Q000502:physiology; D013499:Surface Properties / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000497:Alloys; D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; C031462:titanium alloy (TiAl6V4); C020243:calcium phosphate; D014025:Titanium