A periodontist is evaluating alveolar bone height in a patient with suspected moderate-to-severe periodontal bone loss. Which bitewing radiograph orientation provides a superior view of the alveolar bone crest and is preferred for assessing bone height in periodontal disease?

Vertical bitewing radiographs are superior to horizontal bitewings for evaluating alveolar bone height because they provide greater visualization of the apico-coronal dimension of the bone. Studies confirm that vertical bitewings are significantly better at detecting furcation involvement (100% vs. 57.5% for horizontal) and interproximal alveolar bone loss. Both orientations allow measurement from the CEJ to the alveolar crest, but vertical bitewings capture this relationship more completely, especially with moderate-to-severe bone loss. Horizontal bitewings are preferred for detecting proximal caries in patients with low caries risk and minimal bone loss. Summary: Horizontal bitewing = caries detection; Vertical bitewing = bone level assessment + caries detection.