Injectable temperature-sensitive polymers have been widely used as drug delivery carriers and tissue engineering scaffolds .This review summarizes the latest progress in sol-gel thermoreversible polymeric systems covering natural and modified natural polymers
N-isopropylacrylamide copolymers and poly ( ethylene glycol) poly ( D
L-lactide-co-glycolide) block copolymers .Their applications in biomedical field are also introduced briefly .