The present work is framed within the H2020 GIOTTO project whose general aim is to develop medical devices able to stimulate bone regeneration in compromised clinical situations as osteoporotic fractures. To this aim, substituted nano-hydroxyapatites (nano-HAs) and mesoporous bioactive glasses (MBGs) are excellent candidates to promote bone healing due to their inherent bioactivity and ability to release selected ions able to stimulate bone production (e.g. strontium ions). These bioactive materials can be combined with bioresorbable matrices to design 3D scaffolds able to stimulate physiological bone remodelling while ensuring the structural support needed to assist and guide fracture healing. In particular, the thesis focussed on the production and fully characterization of bioactive inorganic phases, followed by their dispersion into a resorbable polymer matrix to produce hybrid formulations with the desired resorption kinetics and the ability to be processed by 3D printing technologies.