NEET PG DENTAL EXAM

Detailed explanation-1: -Enamel. Enamel is the outer most layer of the tooth that protects teeth from the elements that cause cavities.

Detailed explanation-2: -Cementum is a hard, calcified layer of tissue that covers the root of the tooth. On its outer side, cementum is attached to the periodontal ligament; on its inner side, the dentin. Along with the periodontal ligament, alveolar bone and gingiva, cementum helps a tooth stay in its place.

Detailed explanation-3: -The two main types of cementum are cellular and acellular. The cementum attached to the root dentin and covering the upper (cervical) portion of the root is acellular and thus is called acellular, or primary, cementum. The lower (apical) portion of the root is covered by cellular, or secondary, cementum.

Detailed explanation-4: -Cementum has historically been classified into cellular and acellular cementum by inclusion or non-inclusion of cementocytes. Generally, acellular cementum is thin and covers the cervical root, whereas thick cellular cementum covers the apical root (Fig.