<unk>  are a group of jaw cysts that are formed from tissues involved in odontogenesis (tooth development).<unk> s are closed sacs, and have a distinct membrane derived from rests of<unk>  epithelium. It may contain air, fluids, or semi-solid material. Intra-bony cysts are most common in the jaws, because the mandible and maxilla are the only bones with epithelial components. That<unk>  epithelium is critical in normal tooth development. However, epithelial rests may be the origin for the cyst lining later. Not all oral cysts are<unk> . For example, mucous cyst of the oral mucosa and nasolabial duct cyst are not of<unk>  origin. In addition, there are several conditions with so-called (radiographic) 'pseudocystic appearance' in jaws; ranging from anatomic variants such as Stafne static bone cyst, to the aggressive aneurysmal bone cyst.
Odontogenic cyst
Dentigerous cyst
Colloid cyst
Tornwaldt cyst
Tarlov cyst
Paradental cyst
Ganglion cyst
Choristoma