Healing potential of nanohydroxyapatite, gelatin, and fibrin-platelet glue combination as tissue engineered scaffolds in radial bone defects of rats

Application of Hydrogels as Sustained-Release Drug Carriers in Bone Defect Repair

Large bone defects resulting from trauma, infection and tumors are usually difficult for the body's repair mechanisms to heal spontaneously. Generally, various types of bones and orthopedic implants are adopted to enhance bone repair and regeneration in the clinic. Due to the limitations of traditional treatments, bone defect repair is still a compelling challenge for orthopedic surgeons. In recent years, bone tissue engineering has become a potential option for bone repair and regeneration. Amidst the various scaffolds for bone tissue engineering applications, hydrogels are considered a new type of non-toxic, non-irritating and biocompatible materials, which are widely used in the biomedicine field currently. Some studies have demonstrated that hydrogels can provide a three-dimensional network structure similar to a natural extracellular matrix for tissue regeneration and can be used to transport cells, biofactors, nutrients and drugs. Therefore, hydrogels may have the potential to be multifunctional sustained-release drug carriers in the treatment of bone defects. The recent applications of different types of hydrogels in bone defect repair were briefly reviewed in this paper.

Improving Antimicrobial Activity of Carbon/Gelatin Composite by Ce(III)

Carbon/gelatin/Ce (CGCe) composite was prepared with high antimicrobial activity. And the structure, thermal property, and antimicrobial activity of the composite were investigated. The research results showed that CGCe has a higher thermal property and antimicrobial activity against S. aureus and E. coli compared with CG. The influences of molecular weight of gelatin, pH, and concentration of Ce (III) on the antimicrobial activity were discussed, and the IC50, MIC, and MBC against S. aureus of CGCe are 185 μm·mL-1, 525 μm·mLl-1, and 700 μm·mL-1, respectively, and the IC50, MIC, and MBC against E. coli of CGCe are 255 μm·mL-1, 700 μm·mL-1, and 1050 μm·mL-1, respectively.