Marginal Ridge

Marginal ridges are the elevated enamel crests that form the mesial and distal borders of a tooth’s occlusal surface on posterior teeth and the lingual borders on anterior teeth. They separate the chewing or biting surface from the adjacent proximal surfaces and contribute to proper tooth shape, contact with neighbouring teeth and effective chewing function.

Well-formed marginal ridges help prevent food impaction, support the tooth against fracture and play a role in maintaining gum health by preserving correct contours between teeth. When a marginal ridge is worn, fractured or affected by decay it can cause sensitivity, alter the bite or increase the risk of cavities, and dentists may evaluate and restore the ridge with fillings, inlays, onlays or crowns while advising on preventive care to reduce further wear.