Which upper tooth shows cups disappear at age 10?

Which upper tooth shows cups disappear at age 10?

• A. Central incisor
• B. Upper central incisor
• C. Upper intermediate incisor
• D. Upper corner incisor

Answer: (C)

Cups are the small pits in the center of the enamel on young upper incisors. They wear away with chewing and age, so you can use which cups are present to estimate a horse’s age. On the upper jaw, the cups disappear in a sequence: central incisor first, then intermediate incisor, then corner incisor. By about age 10, the cup on the upper intermediate incisor has typically disappeared, while the central incisor’s cup is already gone and the corner incisor’s cup may still be present in some horses. So the tooth whose cup disappearance matches age 10 is the upper intermediate incisor.

Cups are the small pits in the center of the enamel on young upper incisors. They wear away with chewing and age, so you can use which cups are present to estimate a horse’s age. On the upper jaw, the cups disappear in a sequence: central incisor first, then intermediate incisor, then corner incisor. By about age 10, the cup on the upper intermediate incisor has typically disappeared, while the central incisor’s cup is already gone and the corner incisor’s cup may still be present in some horses. So the tooth whose cup disappearance matches age 10 is the upper intermediate incisor.