IN VITRO CHARACTERIZATION OF HYDROXYAPATITE-BASED BIOMATERIALS, USING MESENCHYMAL STEM CELL CULTURES FROM HUMAN BONE MARROW

There is considerable interest in the discovery of biomimetic materials that improve cell adhesion and reduce the time of bone integration of implants. In vitro bone cells biocompatibility was performed for the two types of biocomposites hydroxyapatite-titanium (HApTi) and hydroxyapatite-titanium with added calcium fructoborate (HApTiCaFb). In order to investigate the potential cytotoxicity of biomaterials, cell adhesion, proliferation, and osteogenic differentiation, human mesenchymal stem cells (MSCs) were used. Regarding the in vitro biocompatibility, a slight improvement in the phenotype was observed for the samples to which CaFb was added.

THE CHEMISORPTION-RELEASE AND ANTIBACTERIAL POTENTIAL STUDIES OF CIPROFLOXACIN FROM HYDROXYAPATITE-BASED IMPLANTS

Implant infections are the result of bacterial adhesion to the implant surface and subsequent biofilm formation at the implant site. A sustained and high antibiotic concentration over minimal inhibitory concentration (MIC) of pathogenic bacteria at the implant site is expected to inhibit bacterial adhesion, colonization, and biofilm formation. In the present study we performed implants based on hydroxyapatite (HAp), HAp reinforced with titanium particles (HAp/Ti) and Hap/Ti with added calcium fructoborate (CaFb) by chemisorption deposition method (HAp/Ti/CaFb). The implants were immersed in ciprofloxacin (CP) solution for 24 hours, then was determined the release profile of antibiotic for 14 days and the antibacterial effect of the three types of composite. The period of antibiotic release may be considered as sufficient to support osteointegration under antibacterial protection.