What does “Lingual” mean?
Lingual describes the direction toward the tongue. The lingual surface is the tooth surface on that side.
A direction defined by the tongue
Lingual describes the side opposite the outer surface that is readily visible in a mirror. For example, the lingual side of a lower front tooth faces the tongue; the word does not mean right or left.
Direction and surface
Moving lingually describes a direction, while something on the lingual surface describes its location. When discussing decay or a restoration, identify both the tooth and the surface.
Making the word ‘inside’ more precise
Discomfort on the ‘inside’ of a tooth might refer to its tongue-facing surface, the space between teeth, or an internal part of the tooth. Saying whether you mean the surface touched by the tongue or the area between teeth helps locate the problem.
Frequently Asked Questions
Does lingual mean inside the tooth?
No. It means the direction or surface facing the tongue. It differs from terms such as pulp and root canal, which refer to spaces or structures inside the tooth.
Does lingual mean something different on the right and left sides?
On either side, lingual means toward the tongue. Right or left and lingual provide different information about location.
Understanding lingual
Learn what the term means and how it relates to your dental condition.
- Sufficient understanding
Is the location on the tongue-facing surface or inside the tooth?
Explanation and evidenceClarify what ‘inside’ means so that the location is understood correctly.
American Dental Association · Glossary of Dental Terms - Sufficient understanding
Have both the tooth and its surface been identified?
Explanation and evidenceLingual alone does not identify a particular tooth, so confirm which tooth is being discussed.
American Dental Association · Glossary of Dental Terms
