Effects of Surface-Modified Hap on the Properties of Bioceramic Paste for Sla-3D Printing

Recent advancements in additive manufacturing have sparked investments in hydroxyapatite (HAP) formation for tailored preparations. The objective of this study is twofold: to achieve a stable dispersion of HAP in the monomer reaction mixture; and to optimize the characteristics of the resulting polymerization product. By modifying hydroxyapatite with cis-9-Octadecenoamide (OAA); stearic acid (SA); and (3-Aminopropyl) triethoxysilane (A1100); we found that OAA-HAP exhibits the highest wettability with water and resin; along with the most effective dispersion within the paste. Following the optimization of the solid loading of the HAP paste to 50 wt.%, we investigated the relationship between printing process parameters and curing depth across pastes containing modified hydroxyapatite. Finally; the printed hemispherical shells; both with and without φ600 μm holes; demonstrated the efficacy of our printing approach