在喉镜或其他金属内窥镜检查中可能对上下颌牙齿产生压力导致牙齿的损伤。其预防措施是在内窥镜检查中常规使用成品牙齿保护器。然而，当所用的保护器与患者牙弓形态并不是完全一致时，就不能达到足够的保护。为此需要制作与个体牙弓相符合的保护器，即用软塑料制作成全牙列咬 In laryngoscopy or other metal endoscopy, stress on the upper and lower jaw teeth can cause damage to the teeth. The precaution is to routinely use the finished tooth protector in endoscopy. However, adequate protection can not be achieved when the protector used is not exactly the same as the dental arch of the patient. To do this requires the production of individual teeth and bow in line with the protector, made of soft plastic made of dentition