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Periapical cysts exist in two structurally distinct classes: Periapical true cysts - cysts containing cavities entirely surrounded in epithelial lining. Resolution of this type of cyst requires surgical treatment such as a cystectomy. [10] Periapical pocket cysts - epithelium lined cavities that have an opening to the root canal of the affected ...
On the other hand, only 2.7 percent of dentigerous cysts involved the maxillary premolar. Mourshed stated that the incidence of dentigerous cyst has been reported as 1.44 in every 100 unerupted teeth, [12] so dentigerous cysts involving the premolars are rare. Dentigerous cysts most commonly occur in the 2nd and 3rd decades of life.
It is considered that these cell rests proliferate to form epithelial lining of various odontogenic cysts such as radicular cyst under the influence of various stimuli. They are named after Louis-Charles Malassez (1842–1909) who described them.
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 keratocysts are usually noted as incidental radiographic findings. Radiographically they can be seen as unilocular or multilocular radiolucencies. They can be mistaken for other cysts such as residual cysts or a dentigerous cyst if they occur over an unerupted tooth. [8] Relative incidence of odontogenic cysts. [9]
Jaw cysts affect around 3.5% of the population. 10 They are more common in males than females at a ratio of 1.6:1 and most people get them between their 40s and 60s. The order of the jaw cysts from most common to least common is; radicular cysts, dentigerous cysts, residual cysts and odontogenic keratocysts.
The epithelial cell rests of Malassez presented in the roots surface, principal location of the LPC, play a role in LPC formation. [8]Several additional theories had been proposed regarding the origin of lateral periodontal cysts, including the possibility that the lesions may arise as a result of pulpal infection manifesting itself in a lateral position or chronic periodontal disease ...
Although it was originally postulated that the cyst formed from trapped epithelial cells during embryonic fusion of the palatal bones, [3] it is now thought that it forms from oronasal ducts present within the incisive canals. [4] [5] As a cyst, the nasopalatine duct cyst requires histological analysis for a definitive diagnosis.