关键词: 水凝胶, 压电材料, 骨组织工程, 电刺激

Abstract: Piezoelectric hydrogel is a new type of composite material that combines hydrogel polymers with piezoelectric materials. It not only has the good biocompatibility and biodegradability of hydrogel，but can also use piezoelectric materials to simulate the endogenous bioelectricity of bone tissue，promoting cell proliferation and differentiation and accelerating  bone defect repair. The article provides a review on the mechanisms of electrical stimulation in promoting bone regeneration，the classification and preparation methods of piezoelectric hydrogels，and their application in bone tissue engineering，aiming to provide new treatment ideas for bone defect repair.

Key words: hydrogel, piezoelectric material, bone tissue engineering, electrical stimulation