Cyst

A cyst is a sac or cavity filled with liquid which can develop under the skin in several areas of the body. In the mouth, there are several different types of cyst; the most common ones include the apical periodontal cyst which is commonly the result of tooth decay and relates to an infection in the pulp of the tooth or in the nerves running through the tooth. An odontegenic cyst usually forms near to the jawbone; this type of cyst can grow large enough to impact significantly on the positioning of the teeth, causing problems with the alignment of the teeth and discomfort for the individual.

A dentigerous cyst forms on the crown of a developing tooth and can interrupt with existing teeth by causing the roots to dissolve. Gingival cysts form on the gums, usually around the canine or premolar teeth; these are not common and any cysts that do form are often painless. Cysts are generally treated by removal in a simple surgical procedure. Dentigerous cysts however, must often be treated by curettage. Symptoms of cysts include swelling and localised pain.

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