Porous ceramic material and processes for preparing same

Details Porous ceramic material and processes for preparing same Porous ceramic material and processes for preparing same

1984-07-06

1987-03-31

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Pore-forming

501 80, 501 83, 501 85, 501 1, 264 44, 623 16, C04B 3806

Patent

active

046543147

ABSTRACT:
A porous ceramic material composed of a sintered porous body of a calcium phosphate compound is described. A multiplicity of capillary void paths having a diameter of 1 to 30 .mu.m and a multiplicity of pores having a diameter of 1 to 600 .mu.m are formed in the sintered porous body. At least part of the pores are connected to the exterior space of the sintered porous body through at least a part of the capillary voids. The porous ceramic material is valuable as a medical material, e.g., a substitute or prosthesis for bone or dental root, and also an electronic material and a genetic engineering material.
When the porous ceramic material is embedded in a bone defect of human or animals, osteolytic cells, osteoblasts, erythrocytes and body fluid are selectively allowed to intrude through the porous ceramic material while almost no intrusion of osteoclasts and collagen fibers is allowed. Accordingly, the porous ceramic material can be utilized for inducing new-born bone, controlling resorption of bone with age, remedying bone defects.

REFERENCES:
patent: 1934383 (1933-11-01), Stafford
patent: 1992916 (1935-02-01), Johnson
patent: 3416935 (1968-12-01), Einstein et al.
patent: 3497455 (1970-02-01), Ahr
patent: 3929971 (1975-12-01), Roy
patent: 4371484 (1983-02-01), Inukai et al.
patent: 4503157 (1982-03-01), Hatahira

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