The invention discloses injectable hydrogel for treating
periodontitis as well as a preparation method and application of the injectable hydrogel. The injectable hydrogel is prepared from the following raw materials:
chitosan and derivatives thereof, oxidative modified natural
polysaccharide and modified hydroxyapatite, the modified hydroxyapatite comprises hydroxyapatite, and the surface of the hydroxyapatite is modified with a
metal polyphenol network. The modified hydroxyapatite has multiple functions of
oxidation resistance, immunoregulation, osteogenesis promotion, migration promotion,
tube formation promotion,
antibiosis and the like, and can be combined with the injectable hydrogel with
biological adhesion and self-healing performance to realize better in-vivo
tissue healing. The injectable hydrogel of the composite functional
hydroxyapatite nanoparticles synthesized by the invention has
biocompatibility,
oxidation resistance, immunoregulation performance, osteogenesis promotion performance and antibacterial performance, and can realize better alveolar
bone regeneration and repair in a rat
periodontitis model, and the effect of the injectable hydrogel is superior to that of clinically common
minocycline.