**Abstract**

In periodontics, the main purpose of radiography is to detect the level of the alveolar bone including the pattern and extent of loss of the bone. Measurements which are of linear from the cement-enamel junction to the crest of the alveolar bone and from the cement enamel junction to the bone defect base are commonly used to measure the bone height and bone defects. In radiographs, the periodontal ligament space, lamina dura and periapical region are seen and also helpful in identifying risk, such as calculus and dislodged restorations. Radiographs can provide information for proper diagnosis and treatment planning, which can provide information for the assessment of accurate treatment outcomes.

**Keywords:** computed tomography, cone beam computed tomography, tuned aperture computed tomography, magnetic resonance imaging, ultrasonography
