Effect of sintering holding time on the properties of Hydroxyapatite granules fabrication using dripping technique of HA-Alginate sintered at 1000 °C

Abstract

Abstract CaP granules as bone graft are used for open defect of bone, where is not necessary mechanical stability they are proposed for no-load bearing applications. The important feature in the physical structure of a synthetic ceramic bone graft is its porosity, pore size, the volume of porosity and interconnections between the pores are three crucial parameters. The pore structure is of great importance for osteoconduction. The level of porosity, pore size distribution and degree of pore interconnectivity significantly influence the extent of bone ingrowth. According to that, this study investigated the effect of sintering holding time on properties of droplet synthetic ha-alginate using dripping technique sintered at 1000 0C with sintering holding time at 1: 2 :3 hours respectively. XRD was used to investigate of phases of the sintered droplet. Scanning Electron Microscope (SEM) was used to investigate the microstructure of beads. In this work, we can conclude that the holding time increased, the crystallinity increased but on the other hand, pore size, porosity, and surface roughness decreased. For all investigated samples. The surface roughness of A102 (0.2 – 2, μm) which is sintered at 1000 0C 2 hours holding time has a better value offered better cell colonialization and has no significant value of porosity (50%) and crystallinity (86.63%) than those of A103 which need more energy for sintering as a consequence.