Static mechanical properties of hydroxyapatite (HA) powder-filled acrylic bone cements: effect of type of HA powder.
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).
Morejón
Lizette
L
Centro de Biomateriales, Universidad de La Habana, Habana, Cuba.
Mendizábal
Alonso Eduardo
AE
García-Menocal
José Angel Delgado
JA
Ginebra
María Pau
MP
Aparicio
Conrado
C
Mur
Francisco Javier Gil
FJ
Marsal
Montserrat
M
Davidenko
Natalia
N
Ballesteros
María E
ME
Planell
Josep Anton
JA
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
D006882:Hydroxyapatites; D012821:Silanes; C475044:hydroxyapatite cement; D019904:Polymethyl Methacrylate