Three-Dimensional Printing of Drug-Eluting Implants: Preparation of an Antimicrobial Polylactide Feedstock Material

Research output: Contribution to journalJournal articleResearchpeer-review

Jorrit Jeroen Water, Adam Bohr, Johan Peter Bøtker, Johanna Aho, Niklas Sandler, Hanne Mørck Nielsen, Jukka Rantanen

The aim of the present work was to investigate the potential of three-dimensional (3D) printing as a manufacturing method for products intended for personalized treatments by exploring the production of novel polylactide-based feedstock materials for 3D printing purposes. Nitrofurantoin (NF) and hydroxyapatite (HA) were successfully mixed and extruded with up to 30% drug load with and without addition of 5% HA in polylactide strands, which were subsequently 3D-printed into model disc geometries (10 × 2 mm). X-ray powder diffraction analysis showed that NF maintained its anhydrate solid form during the processing. Release of NF from the disks was dependent on the drug loading in a concentration-dependent manner as a higher level of released drug was observed from disks with higher drug loads. Disks with 30% drug loading were able to prevent surface-associated and planktonic growth of Staphylococcus aureus over a period of 7 days. At 10% drug loading, the disks did not inhibit planktonic growth, but still inhibited surface-associated growth. Elemental analysis indicated the presence of microdomains of solid drug supporting the observed slow and partial drug release. This work demonstrates the potential of custom-made, drug-loaded feedstock materials for 3D printing of pharmaceutical products for controlled release.

Original languageEnglish
JournalJournal of Pharmaceutical Sciences
Pages (from-to)1099–1107
Number of pages9
Publication statusPublished - 15 Jan 2015

ID: 130882351