STUDIES ON DEGRADATION OF THREE-DIMENSIONAL POROUS POLY-DL-LACTIDE/HYDROXYAPATITE COMPOSITES IN VITRO / 解放军医学杂志

ABSTRACT

To investigate the degradation features of HA and PDLLA/HA composites in different proportion in vitro. Four kinds of foams consisting of PDLLA, PDLLA/HA (5%wt), PDLLA/HA (20%wt), and PDLLA/HA (35%wt) were immersed in distilled water. Changes in pH, mass loss, viscosity-average molecular weight, and strength against pressure were observed and compared to study degradation features of specimens in vitro. There were statistically differences in the indexes between the PDLLA/HA (20%wt) composite and the other foams after 12 weeks (P