Crestal Bone
The most coronal portion of the alveolar bone, forming the ridge between adjacent teeth, whose height and density are key indicators of periodontal health.
Full Definition
Crestal bone refers to the most superior (or inferior in the mandible) margin of the interdental alveolar septum, visible on bitewing and periapical radiographs. In a periodontally healthy adult, the alveolar crest is typically 1–2 mm apical to the cementoenamel junction. Loss of crestal bone height is a radiographic hallmark of periodontal disease and peri-implantitis. Editors should ensure 'crestal bone' is not conflated with 'cortical bone' (the dense outer plate of bone) or 'trabecular bone' (the internal spongy bone).
Usage
Usage note: Distinguish 'crestal bone' from 'alveolar bone proper' in periodontal and implant texts; the former is the most coronal rim, the latter encompasses all tooth-supporting bone.
In Context
- "Radiographic assessment demonstrated generalised horizontal crestal bone loss consistent with chronic periodontitis." — Periodontal assessment report
- "The distance from the cementoenamel junction to the crestal bone was measured at 3.5 mm, indicating early bone loss." — Research methodology section