Calcium Polyphosphate/Polyvinyl Acid-Carbonate Copolymer Based Composites for Use in Biodegradable Load-Bearing Composites for Orthopaedic Implant Fabrication
Particle filled composite and interpetrating phase composite (IPC) structures are investigated for the production of a biodegradable composite for use as a fixation device in various osteosynthesis applications. The composites consist of calcium polyphosphate, present as either a dispersion of 106 – 150 µm particles or as a sintered scaffold-like structure having open porosity in the range of 18 – 35 volume percent, and a polyvinyl acid-carbonate copolymer that is cured in situ via free radical polymerization. The performance of each composite structure is evaluated in terms of its three-point bend strength and elastic constant. Plane strain fracture toughness values are also presented for IPC samples based on CPP sintered to have 30 volume percent porosity.
Panjian Li, Kai Zhang and Clifford W. Colwell, Jr.
S.D. Ramsay et al., "Calcium Polyphosphate/Polyvinyl Acid-Carbonate Copolymer Based Composites for Use in Biodegradable Load-Bearing Composites for Orthopaedic Implant Fabrication", Key Engineering Materials, Vols. 284-286, pp. 787-790, 2005