A cross section tooth model is a biological teaching tool used to display the internal structure of teeth and different levels of tooth tissue. This model is usually made in proportion to the actual teeth, and the cross-sectional design can clearly display structures such as enamel, dentin, pulp cavity, dental bone, and periodontal membrane. In biology teaching, cross section tooth models can help students intuitively understand the anatomical structure and function of teeth, learn about the growth and development process of teeth, as well as common dental diseases such as dental caries and pulpitis. By observing the model, students can understand the knowledge of dental health, master the correct brushing methods and oral hygiene habits.