abstract
Include periodontal cyst and odontogenic cyst. This disease is more common in elderly patients. Due to the infection and injury of root, apical granuloma is cystic, and lateral incisors are the most common. The cyst is covered by squamous epithelial tissue, and the root tip of the diseased tooth protrudes into the cyst cavity.
Tooth cyst develops from normal tooth sac during tooth development. Due to the cystic degeneration of the stellate reticular layer of the enamel maker, the fluid around the tooth capsule oozes between the crown and the epithelium, which is more common in young patients. Mandible is more common than maxilla.
Periodontal cysts and odontogenic cysts grow slowly, but they can continue to grow and press the maxillary sinus bone to become thinner and displaced, or grow directly into the maxillary sinus. Huge cysts can destroy the wall of maxillary sinus, leading to the uplift of cheeks, oral vestibule, hard palate and alveolar process. Due to nervousness, the eyeball moves upward and outward, or expands to the nasal cavity to cause nasal congestion. In the absence of infection, there is often no typical pain locally.
Clinically, the diagnosis can be made according to the results of dental examination, maxillary sinus puncture and X-ray film (sinus film-plain film or intracavitary injection of contrast agent). If the cheek or oral vestibule is swollen, it can be known that there is a smooth and elastic surface under it, such as the feeling of pressing table tennis or breaking eggshells.
Periodontal cysts are common in the elderly, and the number of periodontal cysts can be single or multiple, especially at the root of lateral incisors. The contents of capsules are thin and transparent, and some are ginger or sauce-colored liquids containing cholesterol.
The onset age of odontogenic cyst is young, and single cyst is the most common. It is common in the incisors and third molars listed above, and can also be extra teeth. Its contents are clear dark brown or brown liquid containing cholesterol. On the X-ray film, the shadow of periodontal cyst shows that the root of the diseased tooth protrudes into the cyst cavity. On the dental cyst film, we can see that there are one or several complete teeth or crowns in the cyst, and the position is not fixed, and the crowns protrude into the cyst cavity.
Symptoms and signs
Cysts are more common in teenagers. There were no symptoms at first. If you continue to grow and the bones gradually expand around, you will form facial deformities, and corresponding local symptoms can appear according to different parts.
The cause of the disease
Tooth cyst, also known as follicular cyst, occurs after the formation of crown or root, and there is fluid oozing between the residual enamel epithelium and the surface of crown, forming tooth cyst. It can come from 1 tooth germ (including 1 tooth) or from multiple tooth germs (including multiple teeth). Tooth cyst is one of the most common odontogenic jaw cysts, accounting for 18%, second only to apical cyst.