Gingival Zenith
Pronunciation: ZEE-nith
The most apical point of the gingival margin of a tooth, used as a reference for aesthetic crown lengthening and restorative margin placement.
Full Definition
The gingival zenith is the lowest (most apical) point of the free gingival margin as viewed from the facial aspect, and it is a key landmark in smile design and aesthetic dentistry. For maxillary central incisors and canines, the zenith is positioned slightly distal to the long axis of the tooth; for lateral incisors it typically aligns with the long axis. Errors in crown or veneer margin placement relative to the gingival zenith can compromise smile aesthetics. Editors should not confuse this with the 'gingival margin', which refers to the entire crest of free gingiva, of which the zenith is a single point.
Usage
Usage note: Always lowercase. Used prominently in aesthetic/cosmetic dentistry and smile design documentation. Not interchangeable with 'gingival margin' — the zenith is a single point within the margin.
In Context
- "The gingival zenith of the upper-right canine was positioned 1 mm more apically than that of the central incisor, creating an asymmetric gingival outline." — Aesthetic smile design treatment plan
- "Crown-lengthening surgery was planned to equalise the gingival zenith positions of the upper anterior teeth." — Periodontal pre-restorative surgery referral letter