and microstructure of “apatite/collagen/ chondroitin sulfuric acid” hybrid type nanoscale composite생체활성 ... 생체활성 세라믹스/고분자 복합체 - 기계적 물성의 개선 목적 → calcium-phosphate ceramics, bioglass : 생체활성 부여 → polymer : 탄성율 저하 ... , and plates made of forged HA/PLLA composites생체활성 골 시멘트PMMA (polymethylmethacrylate) bone cement - PMMA