Plugs, also known as cyst occluders, usually have an impact if no plugs are made after mandibular dentition-containing cyst opening surgery, which can easily cause postoperative infections. Cyst occluder is used to close the wound after cyst opening surgery, which can prevent the opening from healing prematurely, facilitate rinsing and drainage, and prevent infection caused by poor drainage. At the same time, the cyst occluder can prevent food from entering the cystic cavity when eating, which is conducive to the cleaning of the cystic cavity and avoiding cystic cavity infection. Therefore, it is easy to cause postoperative infection if no plug is made after surgery. Mandibular dentigerous cyst refers to the cyst formed by fluid exudation and accumulation between the epithelium and the crown of the tooth in the mandible after the formation of the enamel of the crown of the tooth. In mandibular dentigerous cyst surgery, a hole is first made in the cyst to drain the fluid from the cyst cavity, and then the cyst is completely removed after it has shrunk in size, and the wound is plugged with an occluder. Therefore, not having a plug after mandibular dentigerous cyst opening surgery can have certain effects and patients should consult their doctor for advice before surgery.