Title :
A hydrophilic self-anchoring material for orthopedic devices
Author :
Sharda, Asutosh N. ; Kamel, I.L.
Author_Institution :
Biomed. Eng. & Sci. Inst., Drexel Univ., Philadelphia, PA, USA
Abstract :
A hydrophilic polymer matrix reinforced with a 3D braided graphite structure is presented as a novel alternative to traditional metallic materials for orthopedic devices. This material has the mechanical properties of bone in the dry state. When fitted into a mold and immersed in an aqueous medium, its swelling tendency causes the application of a radial force on the mold, anchoring the material in place and enhancing bone deposition. The swelling behavior of the poly(acrylic acid) matrix as a function of the concentration of AMA and glycerol was characterized and reduced to 38 vol.%. A push-out test was conducted to determine the strength of the implant/mold interface. This was measured to be 8.3 MPa using an aluminum mold
Keywords :
bone; carbon fibre reinforced plastics; prosthetics; 3D braided graphite structure; C; aqueous medium; bone deposition enhancement; bone mechanical properties; glycerol; hydrophilic self-anchoring material; implant/mold interface; orthopedic devices; poly(acrylic acid) matrix; push-out test; radial force; reinforced hydrophilic polymer matrix; swelling tendency; Acceleration; Biological materials; Biomedical materials; Bones; Coatings; Implants; Mechanical factors; Orthopedic surgery; Polymers; Prosthetics;
Conference_Titel :
Bioengineering Conference, 1994., Proceedings of the 1994 20th Annual Northeast
Conference_Location :
Springfield, MA
Print_ISBN :
0-7803-1930-3
DOI :
10.1109/NEBC.1994.305186
