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Dental pulp stem cells (DPSCs) are mesenchymal stem cells derived from dental pulp tissue with self⁃re⁃ newal, high proliferative capacity and multidirectional differentiation potential. Under appropriate induction conditions, DPSCs can be differentiated into various types of cells, such as osteoblasts, odontoblasts, chondrocytes, adipocytes, and neuronal cells. DPSCs have been gradually applied to clinical trials and preclinical studies and are important seed cells in the field of periodontal tissue engineering and regenerative medicine. In this paper, the factors affecting the biological characteristics of DPSCs are reviewed together with a review of recent literature published worldwide. The results of the literature review show that the biological characteristics of DPSCs can be influenced by many factors, such as tissue source, culture method, environment and induction conditions, which has guiding significance for research and applica⁃ tions of DPSCs.