Abstract
Osteoporosis increases the risk of bone fracture by reducing bone mass and thereby increasing bone fragility. The addition of strontium (Sr) nanoparticles in bone tissue results in a strengthening of the bone, induction bone formation by osteoblasts, and reduction of bone reabsorption by osteoclasts. The use of Sr for bone tissue regeneration has gained significant research interest in recent years due to its beneficial properties in treating osteoporotic-induced bone loss. We hypothesized that Sr-coated and antibiotic-doped HNTs could be used in antimicrobial coatings and as an antibacterial drug delivery vehicle. Accordingly, we coated HNTs with strontium carbonate (SrHNT) using a simple, novel, and effective electrodeposition method. We tested the antibacterial properties of SrHNT on Escherichia coli, Staphylococcus aureus, and Staphylococcus epidermis using the disc diffusion method. We assessed the potential cytotoxic and proliferative effects of SrHNTs on pre-osteoblasts using a Live/Dead cytotoxicity and cell proliferation assay. We successfully coated HNTs with strontium using a one-step benign coating method that does not produce any toxic waste, unlike most HNT metal-coating methods. Antibacterial tests showed that the SrHNTs had a pronounced growth inhibition effect, and cell culture studies using MC 3T3 cells concluded that SrHNTs are cytocompatible and enhance cell proliferation.
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