title: Ultrastructural evaluation of in vitro mineralized calcium phosphate phase on surface phosphorylated poly(hydroxy ethyl methacrylate-co-methyl methacrylate).
abstract: The in vitro functionality of surface phosphorylated poly(hydroxy ethyl methacrylate-co-methyl methacrylate), poly(HEMA-co-MMA) to induce bioinspired mineralization of calcium phosphate phase is evaluated. The primary nucleation of calcium phosphate on the surface phosphorylated copolymer occurs within 3 days of immersion when immersed in 1.5x simulated body fluid and the degree of mineralization is proportional to the hydroxy ethyl methacrylate content in the copolymer. The calcium phosphate phase is identified as hydroxyapatite by X-Ray diffraction analysis. The transmission electron microscopic evaluation combined with selected area diffraction pattern and energy dispersive analysis exemplified that the primary nuclei of amorphous calcium phosphate transforms to crystalline needle like calcium rich apatite, within a period of 3 days immersion in simulated body fluid. The atomic force microscopic results corroborate the c-axis growth of the crystals within 3 days immersion in SBF.
authors.affiliation: Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram, India. sailajags@gmail.com
authors.forename: G S
authors.initials: GS
authors.lastname: Sailaja
authors.forename: P
authors.initials: P
authors.lastname: Ramesh
authors.forename: H K
authors.initials: HK
authors.lastname: Varma
mesh_terms: D001826:Body Fluids / Q000737:chemistry / Q000378:metabolism / Q000502:physiology; D018786:Bone Substitutes / Q000032:analysis / Q000737:chemistry / Q000378:metabolism; D002113:Calcification, Physiologic; D002130:Calcium Phosphates / Q000032:analysis / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000032:analysis / Q000737:chemistry / Q000378:metabolism; D003460:Crystallization; D008768:Methylmethacrylates / Q000737:chemistry* / Q000378:metabolism; D018625:Microscopy, Atomic Force / Q000379:methods; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D010766:Phosphorylation; D011102:Polyhydroxyethyl Methacrylate / Q000737:chemistry* / Q000378:metabolism; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D018786:Bone Substitutes; D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; D008768:Methylmethacrylates; D011102:Polyhydroxyethyl Methacrylate; C040206:HTR composite; C020243:calcium phosphate