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Odontogenic cyst are a group of jaw cysts that are formed from tissues involved in odontogenesis (tooth development). Odontogenic cysts are closed sacs, and have a distinct membrane derived from rests of odontogenic 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 odontogenic epithelium is critical in normal tooth development. However, epithelial rests may be the origin for the cyst lining later. Not all oral cysts are odontogenic cyst. For example, mucous cyst of the oral mucosa and nasolabial duct cyst are not of odontogenic 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. ==Classification== *I. Cysts of the jaws * *A. Epithelial-lined cysts * * *1. Developmental origin * * * *(a) Odontogenic * * * * *i. Gingival cyst of infants * * * * *ii. Odontogenic keratocyst * * * * *iii. Dentigerous cyst * * * * *iv. Eruption cyst * * * * *v. Gingival cyst of adults * * * * *vi. Developmental lateral periodontal cyst * * * * *vii. Botryoid odontogenic cyst * * * * *viii. Glandular odontogenic cyst * * * * *ix. Calcifying odontogenic cyst * * * *(b) Non-odontogenic * * * * *i. Midpalatal raphé cyst of infants * * * * *ii. Nasopalatine duct cyst * * * * *iii. Nasolabial cyst * * *2. Inflammatory origin * * * *i. Radicular cyst, apical and lateral * * * *ii. Residual cyst * * * *iii. Paradental cyst and juvenile paradental cyst * * * *iv. Inflammatory collateral cyst * *B. Non-epithelial-lined cysts * * *1. Solitary bone cyst * * *2. Aneurysmal bone cyst *II. Cysts associated with the maxillary antrum * *1. Mucocele * *2. Retention cyst * *3. Pseudocyst * *4. Postoperative maxillary cyst *III. Cysts of the soft tissues of the mouth, face and neck * *1. Dermoid and epidermoid cysts * *2. Lymphoepithelial (branchial) cyst * *3. Thyroglossal duct cyst * *4. Anterior median lingual cyst (intralingual cyst of foregut origin) * *5. Oral cysts with gastric or intestinal epithelium (oral alimentary tract cyst) * *6. Cystic hygroma * *7. Nasopharyngeal cyst * *8. Thymic cyst * *9. Cysts of the salivary glands: mucous extravasation cyst; mucous retention cyst; ranula; polycystic (dysgenetic) disease of the parotid * *10. Parasitic cysts: hydatid cyst; Cysticercus cellulosae; trichinosis * Buccal bifurcation cyst * Calcifying odontogenic cyst * Dentigerous cyst (associated with the crowns of non-erupted teeth) * Glandular odontogenic cyst * Keratocyst (in the jaws, these can appear solitary or associated with the Gorlin-Goltz or Nevoid basal cell carcinoma syndrome. The latest World Health Organization classification considers Keratocysts as tumors rather than cysts) * Paradental cyst * Periapical cyst (The periapical cyst, otherwise known as radicular cyst, is the most common odontogenic cyst.) * Radicular cyst (associated with the roots of non-vital teeth, also known as Periapical cyst) * Residual cyst 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「odontogenic cyst」の詳細全文を読む スポンサード リンク
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