BMP7 and periodontal disorder: In recent years, chitosan/β-glycerophosphate (CS/β-GP) thermosensitive hydrogels have served as drug delivery systems to load bone morphogenetic protein-7 (BMP-7) and ornidazole (ORN), continuously releasing them to treat periodontal diseases.79 Moreover, chitosan/β-glycerophosphate (CS/β-GP) thermosensitive hydrogels were loaded with aspirin to control inflammation and erythropoietin.