| 摘要 |
PROBLEM TO BE SOLVED: To obtain an ideal biological material which has higher mechanical strength than a bone, has rigidity and toughness, is difficult to suffer initial breakage, has higher connection ability, bone conductivity, and bone induction ability with a biological bone and has higher decomposition and absorption ability with in vivo because of use of bioceramics, and the biological material keep its strength until hard tissues are cured, then gradually is decomposed and absorbed. SOLUTION: This composite material is made in such a manner that bioceramics particles with diameter of 0.2 to 50μm are distributed in a crystalline thermoplastic polymer material with in vivo decomposition and absorptivity by 10 to 60% by weight. In a higher strength implant material of press-oriented forming body in which polymer crystals are press-oriented and its crystallization rate is 10 to 70%, crystals are oriented in parallel to multiple reference axes. A composite material in which bioceramics particles are distributed in a crystalline thermoplastic polymer materials with in vivo decomposition and absorptivity is created in advance, are melted and formed to make a pre forming body, and the pre-forming body is cold-pressed, filled, and oriented to produce an oriented forming body. |
