Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 22, Pages -Publisher
MDPI
DOI: 10.3390/ijms232214315
Keywords
biocomposites; PLA; hydroxyapatite; surface modification; mechanical strength; cytobiocompatibility; cell adhesion; osteoconduction; sodium alendronate
Funding
- Foundation for Polish Sciences [POIR.04.04.00-00-16D7/18]
- European Union under the European Regional Development Fund
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This study investigates a novel two-step modification strategy to improve the compatibility and mechanical strength of composite materials for bone regeneration. The modified composite shows promising potential for biomedical engineering applications.
Synthetic implants are used to treat large bone defects that are often unable to regenerate, for example those caused by osteoporosis. It is necessary that the materials used to manufacture them are biocompatible and resorbable. Polymer-ceramic composites, such as those based on poly(L-lactide) (PLLA) and calcium phosphate ceramics (Ca-P), are often used for these purposes. In this study, we attempted to investigate an innovative strategy for two-step (dual) modification of composites and their components to improve the compatibility of composite components and the adhesion between PLA and Ca-P whiskers, and to increase the mechanical strength of the composite, as well as improve osteological bioactivity and prevent bone resorption in composites intended for bone regeneration. In the first step, Ca-P whiskers were modified with a saturated fatty acid namely, lauric acid (LA), or a silane coupling agent gamma-aminopropyltriethoxysilane (APTES). Then, the composite, characterized by the best mechanical properties, was modified in the second stage of the work with an active chemical compound used in medicine as a first-line drug in osteoporosis-sodium alendronate, belonging to the group of bisphosphonates (BP). As a result of the research covered in this work, the composite modified with APTES and alendronate was found to be a promising candidate for future biomedical engineering applications.
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