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    Assessing the effects of boron-doped biphasic calcium phosphate on the characteristics of chitosan-based composite foams
    (Springer, 2025) Acar, Nurcan; Mutlu, Busra; Akben, Hatice Kubra; Duman, Seyma
    In this study, composite foams containing chitosan (CHI) and boron doped-biphasic calcium phosphate (BCP) were developed using freeze-drying method. The quantities of BCP incorporated into the CHI matrix were introduced into the foams at three different ratios: 25 wt%, 50 wt%, and 75 wt%. The objective of this study was to investigate the microstructure, swelling, mechanical, and biological properties of boron-doped BCP/CHI-based composites. Scanning electron microscopy (SEM) micrographs revealed that all of the composites exhibited open and interconnected pore morphologies. The FTIR spectra demonstrated that boron doping interacts with the hydroxyl and phosphate groups in the CHI/BCP composites, which is evidenced by changes in peak intensities. It was found that low amounts of boron positively affected the compressive strength and in vitro cytotoxicity of the composites. Following simulated body fluid treatment, the boron-doped BCP/CHI composites exhibited robust apatite layer formation. These results indicated that the composite foams with modified physical and mechanical characteristics show considerable promise for use as composite materials in biomedical applications, including bone scaffolds or wound dressings.
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    DESIGN AND STRUCTURAL ANALYSIS OF 3D-PRINTED POROUS POLYLACTIC ACID/HYDROXYAPATITE SCAFFOLDS
    (2024) Acar, Nurcan; Terzi, Mehmet Kürşat; Yılmaz, Adem; Aydoğdu, Rumeysa; Mutlu, Büşra; Duman, Şeyma Duman
    Different designs of three-dimensional (3D) structures have gained increasing importance in the field of bone tissue engineering. Appropriate porosity and adequate mechanical properties are essen-tial requirements for scaffolds. The porosity and mechanical properties of the scaffolds higly depend on their 3D-modeled design. By analyzing the mechanical properties of scaffolds of different designs, it can be confirmed that it can be an important potential platform for regenerating damaged bone tis-sue. In this study, a wide variety of unit cells and lattice structures with different pore structures of polylactic acid (PLA)/hydroxyapatite (HA) based scaffolds were modeled and designed. Structural analyzes of the designed models were carried out in the simulation environment and their mechanical properties were compared with similar studies. According to the obtained results, PLA/HA-based scaffolds with different designs are thought to have high potential for bone tissue engineering appli-cations.