BiteWing

Bitewing radiographs are dental X-ray images that capture the crowns of the posterior teeth and the height of the alveolar bone between them. The image receptor (film or digital sensor) is placed in the mouth and the patient bites on a tab to stabilize it during exposure. Bitewings are primarily used to detect interproximal caries and to assess periodontal bone levels for periodontal health monitoring.

Acquisition and technique involve directing the X-ray beam parallel to the crowns while the receptor remains aligned with the occlusal plane. Horizontal bitewings show the contact areas between posterior teeth and the surrounding bone, making them useful for detecting early decay and assessing bone support. Vertical bitewings extend the view to capture more tooth roots and bone height, which can be advantageous in adolescents or patients with periodontal concerns. A typical exam may include two bitewings per side (four images total), or be incorporated into a full-mouth radiographic series.

Interpretation and limitations: Bitewings provide essential information about interproximal caries and bone level changes but may miss lesions not located within the captured spaces. They are most informative when interpreted in conjunction with clinical examination and other radiographs. Digital bitewings offer lower radiation doses and faster image availability compared with traditional film.

See also: dental radiography, interproximal caries, periodontal assessment.