What term describes the tip of a tooth root?

What term describes the tip of a tooth root?

• A. Apex
• B. Arch
• C. Crown
• D. Cusp

Answer: (A)

Apex is the term for the tip of a tooth root. It marks the end of the root and the end point of the root canal, and in endodontics it's used when determining the working length and locating the apical foramen where nerves and vessels enter the tooth. The other terms refer to different structures: arch denotes the curved dental row in the jaw; crown is the portion above the gum line; cusp is a pointed elevation on the chewing surface of some teeth. So apex correctly names the tip of the root.

Apex is the term for the tip of a tooth root. It marks the end of the root and the end point of the root canal, and in endodontics it's used when determining the working length and locating the apical foramen where nerves and vessels enter the tooth. The other terms refer to different structures: arch denotes the curved dental row in the jaw; crown is the portion above the gum line; cusp is a pointed elevation on the chewing surface of some teeth. So apex correctly names the tip of the root.