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The border of the cyst is seen as a narrow opaque margin contiguous with the lamina dura. In cysts that are actively enlarging, peripheral areas of the margin may not be present. Periapical cysts have a characteristic unilocular [8] shape on radiographs. There is also a severe border of cortication [9] between the cyst and surrounding bone ...
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.
The order of the jaw cysts from most common to least common is; radicular cysts, dentigerous cysts, residual cysts and odontogenic keratocysts. Radicular lesions are most commonly found in the anterior region of the maxilla 12 – usually around the canines. 11 The majority of cysts are of inflammatory origin 12.
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.
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 ...
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]
Calcifying odontogenic cyst (COC) is a rare developmental lesion that comes from odontogenic epithelium. [2] It is also known as a calcifying cystic odontogenic tumor , which is a proliferation of odontogenic epithelium and scattered nest of ghost cells and calcifications that may form the lining of a cyst , or present as a solid mass.
The traumatic bone cyst, also referred to as a simple bone cyst or hemorrhagic cyst, is a pseudocyst that most commonly affects the mandible of young individuals. It is a benign empty or fluid-containing cavity within the mandible body that does not have evidence of a true epithelial lining.