| Word | Meaning |
|---|---|
| Halitosis | Bad breath. A breath that has a nasty smell. |
| Hygienist | A person qualified to instruct on oral hygiene, scale and polish teeth, apply fissure sealants and fluoride to teeth. |
| Hyperplasia | Overdevelopment of a tissue. Tissue enlargement through multiplication of cells, often a response to inflammation or drugs. |
| Hypertrophy | An increase in size due to a larger number of tissue elements. |
| Hypodontia | >Congenital absence of one or more teeth. |
| Hypoplasia | xIncomplete or underdevelopment of a tissue, bone or tooth structure. |