CEJ
Pronunciation: C-E-J (spelled out)
Also written as: CEJ — Cementoenamel Junction
Acronym for cementoenamel junction, the anatomical boundary between enamel and cementum used as a fixed reference point in periodontal measurement.
Full Definition
CEJ is the universally accepted abbreviation for cementoenamel junction in periodontal and restorative dentistry documentation. It appears frequently in periodontal charts, clinical notes, and academic manuscripts. Editors should ensure the acronym is defined on first use in formal documents and is not rendered with periods (C.E.J.) or hyphens. In some manuscripts, 'ACJ' (amelocemental junction) may appear as an older variant, but CEJ is the preferred modern standard. Consistent usage of CEJ is critical in research papers where repeated full-form use would impede readability.
Usage
Usage note: Write without periods: 'CEJ,' not 'C.E.J.' Define on first use in formal or academic documents. Do not conflate with 'CAL' (clinical attachment level), which is a measurement taken from the CEJ.
In Context
- "Recession was recorded as 2 mm from the CEJ to the free gingival margin." — Periodontal examination record
- "All CAL measurements were calculated relative to the CEJ as per the study protocol." — Clinical research manuscript