📚 Converters & References

Dental Terminology Glossary

Searchable glossary of 200+ dental terms. From basic anatomy (mesial, occlusal, buccal) to advanced clinical vocabulary (osseointegration, periapical, alveoloplasty). Plain-language definitions for patients and students.

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Dental Terminology Glossary
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Why dental terminology matters to patients

A patient who understands what their dentist is saying is a more compliant patient. When a dentist says "you have periapical pathology on the mesial root of the lower right first molar," a patient who has no context hears noise. A patient who knows that periapical means around the root tip and mesial means toward the midline can follow the conversation, ask better questions, and understand why treatment is being recommended.

For dental students and new team members, this glossary covers the core vocabulary that underpins the entire profession - from the directional terms (mesial, distal, buccal, lingual, occlusal) that describe where things are, to the clinical terms (caries, periodontitis, osseointegration) that describe what's happening to teeth and supporting structures.

For interactive tools that apply these terms, see the Tooth Numbering System Converter, our Cephalometric Landmark Reference, or the Dental Symptom Checker for patients wanting to describe their symptoms accurately.

Frequently Asked Questions

Mesial means toward the midline of the dental arch - toward the front of the mouth and toward the centre. Distal means away from the midline - toward the back of the mouth. So the mesial surface of a molar faces toward the front teeth, and the distal surface faces toward the wisdom tooth. These directions are relative to the arch, not the face - which is why a dentist says "mesial surface" rather than "front surface," since front and back are ambiguous for teeth that curve around the arch.
Gingivitis is inflammation of the gum tissue (gingivae) without involvement of the underlying bone. It's reversible with proper cleaning. Periodontitis is the progression of untreated gingivitis to a state where the inflammation has destroyed the bone and connective tissue supporting the tooth. Unlike gingivitis, bone loss from periodontitis is permanent - treatment stops further progression but doesn't regrow the lost bone. Bleeding gums are the most common early sign of gingivitis.

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