Which part of a tooth is located below the gingival layer?

The part of a tooth located below the gingival layer is cementum. Cementum is a mineralized tissue that covers the root of the tooth and helps anchor it to the periodontal ligament, which connects the tooth to the jawbone. Its role is crucial for tooth stability and health, as it provides a surface for the attachment of the periodontal fibers.

Dentin is found beneath the enamel and cementum but is above the gingival margin. Enamel is the hard outer layer of the tooth that covers the crown and is not found below the gingiva. The gingiva itself refers to the gum tissue surrounding the teeth, which is not a structural part of the tooth but rather the soft tissue that supports and protects the teeth and underlying structures. Hence, the correct choice, cementum, is indeed situated below the gingival layer.