title: Static mechanical properties of hydroxyapatite (HA) powder-filled acrylic bone cements: effect of type of HA powder.
abstract: This work reports on the effect of the amount (0, 10, and 30 wt %) and type of HA powder incorporated into an acrylic bone cement on the tensile properties, compression properties, and fracture toughness. The three different types of HA powders used were synthesized in the laboratory and coated with a silane agent prior to incorporation into the cement powder, and differed in particle size, water content, surface area, and crystallinity. It was found that the inclusion of any type of HA powder led to an increase in the tensile modulus (ET), but all the other mechanical properties of the cement decreased (relative to the values of the unfilled cement). The increase in ET is attributed to the good adhesion between the filler and the cement matrix, which is due to the silane coating agent. The decrease in the other mechanical properties may be a consequence of HA powder agglomeration and porosity. Hydroxyapatite morphology and crack-growth mechanisms were analyzed by scanning electronic microscopy (SEM).
authors.affiliation: Centro de Biomateriales, Universidad de La Habana, Habana, Cuba.
authors.forename: Lizette
authors.initials: L
authors.lastname: Morejón
authors.forename: Alonso Eduardo
authors.initials: AE
authors.lastname: Mendizábal
authors.forename: José Angel Delgado
authors.initials: JA
authors.lastname: García-Menocal
authors.forename: María Pau
authors.initials: MP
authors.lastname: Ginebra
authors.forename: Conrado
authors.initials: C
authors.lastname: Aparicio
authors.forename: Francisco Javier Gil
authors.initials: FJ
authors.lastname: Mur
authors.forename: Montserrat
authors.initials: M
authors.lastname: Marsal
authors.forename: Natalia
authors.initials: N
authors.lastname: Davidenko
authors.forename: María E
authors.initials: ME
authors.lastname: Ballesteros
authors.forename: Josep Anton
authors.initials: JA
authors.lastname: Planell
mesh_terms: D006882:Hydroxyapatites / Q000737:chemistry*; D008422:Materials Testing; D019563:Mechanics; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D019904:Polymethyl Methacrylate / Q000737:chemistry* / Q000592:standards; D016062:Porosity; D012821:Silanes; D013718:Tensile Strength; D000267:Tissue Adhesions
chemical_list: D006882:Hydroxyapatites; D012821:Silanes; C475044:hydroxyapatite cement; D019904:Polymethyl Methacrylate