Evaluation of direct light processing for the fabrication of bioactive ceramic scaffolds: Effect of pore/strut size on manufacturability and mechanical performance |
| |
Authors: | Claudia Paredes Francisco J Martínez-Vázquez Hamada Elsayed Paolo Colombo Antonia Pajares Pedro Miranda |
| |
Affiliation: | 1. Department of Mechanical, Energy and Materials Engineering, University of Extremadura, Avda. de Elvas s/n, 06006, Badajoz, Spain;2. Department of Industrial Engineering, University of Padova, Italy;3. Ceramics Department, National Research Centre, 12622, Dokki, Cairo, Egypt;4. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, 16802, USA |
| |
Abstract: | Bioactive ceramic scaffolds for bone regeneration consisting of a three-dimensional mesh of interpenetrating struts with square section were fabricated via Digital Light Processing (DLP). The ability of the technique to manufacture 3D porous structures from β-tricalcium phosphate (β-TCP) powders with different dimensions of struts and pores was evaluated, identifying the possibilities and limitations of the manufacturing process. Small pore sizes were found to seriously complicate the elimination of excess slurry from the scaffold’s innermost pores. The effect of the strut/pore size on the mechanical performance of the scaffolds under compressive stresses was also evaluated, but no significant influence was found. Under compressive stresses, the structures resulted weaker when tested perpendicularly to the printing plane due to interlayer shear failure. Interlayer superficial grooves are proposed as potential failure-controlling defects, which could also explain the lack of a Weibull size effect on the mechanical strength of the fabricated DLP scaffolds. |
| |
Keywords: | Scaffolds Ceramic Mechanical properties Digital Light Processing |
本文献已被 ScienceDirect 等数据库收录! |
|