Study of diopside ceramics for biomaterials.
Diopside was prepared by sintering a powder compact of composition CaO-MgO-2SiO2 at 1300 degreesC for 2 h. The bending strength of diopside was 300 MPa and the fracture toughness was 3.5 MPa m1/2. It was proved that diopside has no general toxicity in cell culture. Diopside implanted in rabbits came in close contact with the newly grown bone. X-ray microanalysis spectral diagrams show a change of composition across the junction from the diopside to the newly grown bone. High-resolution transmission electron microscopy revealed crystal growth at the interface between diopside and the newly grown bone, and continuity between diopside lattices and those of the new crystals.
Nonami
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National Industrial Research Institute of Nagoya, 1-1 Hirate-cho, Kita-ku, Nagoya-shi, 462 Japan.
Tsutsumi
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