BACKGROUND: With the development of life sciences and manufacturing science, the application of three-dimensional(3D) printing in the medical field has become increasingly widespread. OBJECTIVE: To analyze the level of application of 3D printing technology in the medical field, and to discuss the trends and constraints of 3D printing. METHODS: A computer-based retrieval of articles concerning 3D printing in the biomedical field was performed in CNKI, Wan Fang, Springerlink and Pub Med databases. The key wor...