The dental imaging department may come into contact with patients' oral secretions when taking digital dental radiographs, panoramic radiographs, dental CBCT and spiral CT, especially the digital dental radiographs. At present, most dental medical institutions, such as stomatology departments of general hospitals, specialized stomatological hospitals and dental clinics, still use patients' fingers to press film or IP plate for photography, which brings the risk of cross-infection to the medical staff and patients, and brings severe challenges to the hospital feeling in dental photography. However, digital dental radiography is an essential examination item in clinical practice, such as dental trauma, dental pulp disease, periodontal disease and implant review, etc. The film holder is a digital dental film shooting auxiliary device, which can replace the patient's finger pressing film or IP board. Therefore, combined with clinical needs, it is particularly important to optimize the shooting process of digital dental film based on the use of film holder. It can not only meet the needs of clinical diagnosis and treatment, but also reduce the risk of cross infection to a great extent.
