Cusp
Definition
The pointed or rounded projection on the chewing surface of a tooth. Molars typically have 4-5 cusps; premolars have 2. When cusps are damaged or worn, a crown may be needed. Onlays cover one or more cusps while preserving healthy tooth structure.
Related Services
Related Terms
Onlay
A custom restoration that covers one or more cusps of a tooth. Onlays extend over the biting surface, providing more coverage than inlays while being more conservative than full crowns. Also called 'partial crowns.'
Occlusion
The contact relationship between upper and lower teeth when the jaw is closed. Proper occlusion distributes bite forces evenly. Crowns must be carefully adjusted to match your occlusion for comfortable chewing and to prevent damage to the restoration.
Medically reviewed by Dr. Morad Masour Rad, DDS · Last reviewed
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