Читать книгу Shear's Cysts of the Oral and Maxillofacial Regions - Paul M. Speight - Страница 34

  Clinical Features Frequency Age Sex Site Clinical Presentation Radicular Cyst Residual Cyst

  Radiological Features

  Pathogenesis Pathology of Periapical Periodontitis Phase of Initiation Phase of Cyst Formation Growth and Enlargement of the Radicular Cyst Role of Hydrostatic Pressure Epithelial Proliferation Degradation of the Connective Tissues and Bone Resorption

  Histopathology Cellular and Metaplastic Changes Hyaline Bodies Accumulation of Cholesterol Residual Cyst Pocket Cyst (Bay Cyst)

  Malignant Change in Radicular Cysts

  Treatment

The inflammatory odontogenic cysts arise as a result of epithelial proliferation within an inflammatory focus due to a number of causes. Radicular cyst is the most common inflammatory cyst and arises due to proliferation of epithelial remnants in the periodontal ligament as a result of periapical periodontitis following death and necrosis of the pulp. Radicular cysts are most commonly found at the apex of the involved tooth, but may arise on the lateral aspect of the root in relation to a lateral root canal. Quite often a radicular cyst remains behind in the jaws after removal of the offending tooth and this is referred to as a residual cyst (Speight and Soluk‐Tekkeşin 2022a ).

Inflammatory cysts may also occur on the lateral aspect of a tooth as a consequence of an inflammatory process in pericoronal tissues. This lesion has been referred to as a paradental or inflammatory collateral cyst (Main 1970 ; Craig 1976 ; Speight and Soluk‐Tekkeşin 2022b ). Radicular and residual cysts are considered in this chapter. The inflammatory collateral cysts are considered in Chapter 4.