Crestal Bone Loss
The measurable reduction in height of the alveolar crest surrounding a tooth or implant, typically quantified radiographically and used as a primary outcome in periodontal and implant research.
Full Definition
Crestal bone loss describes the apical migration of the alveolar crest as observed on standardized periapical or bitewing radiographs, expressed in millimetres relative to a fixed reference point such as the implant shoulder or cementoenamel junction. It is a key endpoint in longitudinal studies of periodontal disease progression, implant stability, and regenerative therapies. In editorial work, writers must distinguish crestal bone loss from 'marginal bone loss' — the two are closely related but 'marginal' is conventionally reserved for implant contexts. Research manuscripts should specify the reference landmark and measurement technique used to assess crestal bone loss to ensure reproducibility.
Usage
Usage note: When editing implant research, confirm whether the author intends 'crestal bone loss' or 'marginal bone loss'; though often used interchangeably, some journals maintain a distinction between these terms.
In Context
- "Crestal bone loss of more than 2 mm over 12 months was recorded in 14% of implant sites at follow-up." — Results section of an implant survival study
- "Standardized periapical radiographs were used to measure crestal bone loss relative to the implant–abutment junction." — Methods section of a prospective cohort study