TABLE 1.
Diagnostic criteria for periapical cysts based on radiologic features (42). Each feature can be seen alone or in combination with others
| Location | Apex of the involved tooth |
| Periphery | Well-defined corticated border |
| Shape | Curved or circular |
| Internal structure | Radiolucent |
| Effect on surrounding structures | Displacement and resorption of the roots with a curved outline |
| Effect on surrounding bone | Cortical plate perforation |