Sextant
Pronunciation: SEK-stant
One of six anatomical divisions of the oral cavity used to organize and record periodontal assessment data. The mouth is divided into three maxillary and three mandibular sextants.
Full Definition
In periodontal charting, the oral cavity is divided into six sextants: upper right posterior, upper anterior, upper left posterior, lower right posterior, lower anterior, and lower left posterior. This organizational framework facilitates systematic recording of probing depths, bone levels, and treatment needs. Sextant scoring is the basis of the Basic Periodontal Examination (BPE), a screening tool widely used in British and Commonwealth dental practice. In North American records, the term appears in treatment planning narratives and case documentation. Editors should note 'sextant' is singular; 'sextants' when referring to multiple divisions.
Usage
Usage note: Distinguish from 'quadrant,' which divides the mouth into four sections. 'Sextant' is the preferred term when using BPE-based charting systems.
In Context
- "Bleeding on probing was noted in the posterior sextants bilaterally, with the anterior sextant remaining stable." — Periodontal re-evaluation note
- "The BPE score was recorded for each sextant to guide the appropriate level of periodontal treatment." — Periodontal screening report