[Fabrication and physical properties of porous individual beta-TCP scaffold to reconstruct residual alveolar ridge in dog].

PURPOSE: To fabricate porous individual beta-tricalcium phosphate scaffold and test its properties in dog. METHODS: A model of residual alveolar ridge in mandible of a dog was made and CT scanned after 3 months.The data of CT was transformed to 3-D format by MIMICS 7.0 and was made to resin model by rapid prototype technique.The residual alveolar ridge was reconstructed using silicon rubber, and its impression was made.Porous individual beta-tricalcium phosphate scaffold and 5 samples were fabricated for precision and properties test.Porosity, water absorbing capacity and compressive strength of samples were tested with crystalling phase and pore structure were analysed by XRD and scanning electron microscope. RESULTS: We successfully fabricated a scaffold which fit the resin model well and consisted of beta-TCP. Its porosity was 74%,water absorbing capacity was 48%,compressive strength was 4 MPa,diameter of pore was 150 to 400 microm,connecting diameter was 40 microm. CONCLUSIONS: We can fabricate individual beta-TCP scaffold which fit the model well by combination of traditional method and rapid prototype technique.Supported by Shanghai Leading Academic Discipline Project(Grant No.T0202).