The reason why medical practice needs the participation of ear examination model is mainly based on the following reasons:

Firstly, it provides an intuitive and three-dimensional learning tool for medical students. In medical education, the study of theoretical knowledge is important, but the practice is also indispensable. The ear examination model can simulate the real ear structure and lesions, so that medical students can perform the simulation operation of ear examination without contact with real patients. This not only helps medical students to be familiar with ear anatomy, but also enables them to master examination skills in practice and improve diagnostic accuracy.

Secondly, it is helpful to train medical students' clinical thinking. In practice, medical students need to observe the characteristics of lesions on the model, analyze and judge according to the knowledge they have learned, and then draw a diagnosis conclusion. This process not only exercises the practical ability of medical students, but also cultivates their clinical thinking and diagnostic ability. Through repeated practice, medical students can gradually accumulate clinical experience and lay a foundation for future practical work.

In addition, another important role in the practice of medicine is to reduce medical risks. In practice, medical students may cause unnecessary harm to patients due to lack of experience or improper operation. Using the ear examination model to simulate the operation can avoid this risk and enable medical students to learn and practice in a safe environment.

Finally, it is helpful to promote the innovation and development of medical education. With the continuous progress of medical technology and the continuous innovation of teaching methods, medical education needs to be constantly updated and improved. As a new teaching tool, the ear examination model can be combined with the traditional teaching methods to form a diversified teaching model and improve the teaching effect and students' learning interest.

To sum up, the involvement of the ear examination model is needed in medical practice, mainly because the ear examination model provides an intuitive and three-dimensional learning tool for medical students, which helps to cultivate their clinical thinking and diagnostic ability, reduce medical risks, and promote the innovation and development of medical education.