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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 ...
Dental intrusion is an apical displacement of the tooth into the alveolar bone. This injury is accompanied by extensive damage to periodontal ligament , cementum , disruption of the neurovascular supply to the pulp, and communication or fracture of the alveolar socket.
The cyst surrounds the crown and extends for some distance along the root surface so that a significant portion of the root appears to lie within the cyst, as if the tooth was erupting through the centre of the cyst. The radiographic distinction between an enlarged dental follicle and a small dentigerous cyst can be difficult and fairly arbitrary.
If apex of tooth is displaced towards the palate and making contact with the tooth germ then tooth is extracted Intrusive Luxation: Displacement of tooth into the alveolar bone (pushed into the socket) causing fracture of the alveolar bone. It is the most damaging injury to the tooth and supporting tissues as ankylosis and pulp necrosis can occur.
Cysts rarely cause any symptoms, unless they become secondarily infected. [1] The signs depend mostly upon the size and location of the cyst. If the cyst has not expanded beyond the normal anatomical boundaries of the bone, then there will be no palpable lump outside or inside the mouth. The vast majority of cysts expand slowly, and the ...
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]
The onset of lateral periodontal cyst are insidious and subtle, with a yearly growth rate of 0.7 mm. [4] Adjacent teeth vitality is of great importance when contemplating a pre-surgical working diagnosis of lateral periodontal cyst as missing adjacent teeth or past endodontic treatment would affect and confuse the differential diagnosis.
Periapical granuloma, [1] also sometimes referred to as a radicular granuloma or apical granuloma, is an inflammation at the tip of a dead (nonvital) tooth. It is a lesion or mass that typically starts out as an epithelial lined cyst, and undergoes an inward curvature that results in inflammation of granulation tissue at the root tips of a dead tooth.