3D Printing PCL-HA Bone Tissue Engineering Scaffold and Its Performance Test

For the purpose of providing a larger space for designing scaffold and replacing the current method of bone injury repair and bone transplantation by using CAD design with PCL-HA as the material of the porous circular structure that can meet the requirements of the mechanical strength of the material. The CT 3D reconstruction model of the hydroxyapatite scaffold was designed and constructed. CT laser scanning was used to study the structure of the femur and lumbar spine with eight male rabbits, using HA-PCL as material and using 3D printing technology to make bone tissue engineering scaffold. The blank form of the scaffold, the diameter and porosity of the fiber scaffold, and the loading force, the maximum load and the deformation value of the mechanical data were measured. The resulted showed that the pore connectivity rate of each scaffold in each group was 100%; there was no significant difference between the total parameters of the stent and the micro structure parameters. When the load is 320N, the three different cylindrical stents under the maximum pressure, the loading force, deformation and deformation of no significant difference. The result of the present work implied that the combination of CT and CAD reverse technology can complete the design and manufacture of complex bone tissue engineering scaffold materials, there was no significant difference in the physical properties of the porous scaffolds with different loads.