All Free Oral Histology MCQs with Answers

• A. Monocytes are precursor cells of osteoclasts
• B. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border
• C. Contain lysosomes with acid phosphates
• D. All of the above are trueGet Study Guides

Explanation: Osteoclasts arise from monocyte-macrophage precursors, possess a ruffled border against resorbed bone, and contain lysosomes rich in acid…

• A. Cementicles
• B. Osteoblasts
• C. Cementoclasts
• D. Osteoclasts

Explanation: Cementicles are small calcified masses found within the periodontal ligament, often formed from fragmented cementum or calcified…

• A. Lamina dura
• B. Bundle bone
• C. Lamina propria
• D. Lamina densaBook Dental Checkups

Explanation: Bundle bone is the alveolar bone lining the tooth socket and contains numerous embedded Sharpey’s fibres from the periodontal ligament.

• A. Cementum
• B. Pulp
• C. PDL
• D. Dentin

Explanation: The intermediate plexus is a network formed by intermingling periodontal ligament fibres, so it is located within the PDL rather than in…

• A. Greatest in the middle-third of a single rotted tooth
• B. Greatest in the middle-third of a multirooted tooth
• C. A net like plexus that runs closer to the cementum than to the bone
• D. A net like plexus that runs closer to the bone than to the cementumOrder DNA Kits

Explanation: The periodontal ligament has a vascular network that lies closer to the alveolar bone than to the cementum, allowing vessels to enter…

• A. Fibroblasts
• B. Cell rests of malassez
• C. Cementoblasts
• D. Multi totipotent cells

Explanation: Fibroblasts, stem-like multipotent cells, and cementoblasts arise from mesenchymal ectomesenchyme.

• A. Gingiva
• B. Alveolar bone
• C. Periodontal ligament
• D. CementumConsult Online Doctors

Explanation: Hertwig’s epithelial root sheath breaks up after initiating root formation, leaving epithelial cell rests of Malassez within the…

• A. Type IV and III Collagen
• B. Type I and III collagen
• C. Type IV collagen
• D. Type V and VII collagen

Explanation: Anchoring fibrils are associated chiefly with type VII collagen, which links the epithelial or connective-tissue basement membrane to…

• A. Contains epithelial cells
• B. Has a slow rate of turn over
• C. Derives its blood supply primarily from the branches of vessels entering the pulp
• D. Comprises primarily of type II collagenExplore Anatomy Models

Explanation: The periodontal ligament contains epithelial cell rests of Malassez, remnants of Hertwig’s root sheath.

• A. Bone
• B. Cementum
• C. Dentin
• D. Pulp

Explanation: Cementum is avascular and lacks sensory nerves, whereas dentin and pulp are innervated and alveolar bone contains nerve fibers.

• A. Cellular cementum
• B. Incremental line
• C. Cementoid
• D. Acellular cementumAccess Clinical Journals

Explanation: Cementoid is the newly deposited, unmineralized organic matrix on the cementum surface, so it is less mineralized than cementum or its…

• A. Cellular cementum
• B. Acellular cementum
• C. Intermediate cementum
• D. All of the above

Explanation: Cellular cementum is deposited mainly in the apical and furcation regions and can continue to form after eruption, helping compensate for…

• A. Hyperplasia of cementum
• B. Resorption of cementum
• C. Hypertrophy of cementum
• D. None of the above

Explanation: Trauma and excessive occlusal forces can damage the root surface and stimulate cemental resorption, often with associated periodontal…

• A. 55 to 60%
• B. 65 to 70%
• C. 60 to 65%
• D. 70 to 75%

Explanation: At the cementoenamel junction, cementum overlaps enamel in approximately 60% to 65% of teeth; in fewer teeth the edges meet or a gap…

• A. None of the above
• B. Vascular
• C. Has blood supply initially only
• D. Avascular

Explanation: Cementum is avascular, so it receives nutrients by diffusion from the periodontal ligament rather than through vessels within the tissue.

• A. Hyperplasia
• B. Hypoplasia
• C. Hypertrophy
• D. Excementoses

Explanation: Excessive growth of cementum that does not improve its functional quality is termed hyperplasia.

• A. All of the above are correct
• B. Predominantly seen in apical tow thirds of roots of molars and premolars and is rare in incisors or deciduous teeth
• C. Represents area of entrapment of hertwig's sheath in dentin or cementum
• D. Does not exhibit features of either dentin of cementum

Explanation: The intermediate cemental layer is associated with remnants or entrapment of Hertwig’s epithelial root sheath and lacks the usual features…

• A. Acellular cementum
• B. Cellular cementum
• C. Both of the above
• D. None of the above

Explanation: Cellular cementum is deposited mainly during root-end formation and tooth eruption, particularly in the apical region.

• A. Enamel meet cementum at a point
• B. Both never meet
• C. Cementum overlaps enamel
• D. Enamel overlaps cementum

Explanation: At the cementoenamel junction, cementum usually overlaps enamel or meets it edge to edge, while enamel overlapping cementum is rare.

• A. Dental cementum
• B. Dental pulp
• C. Enamel
• D. Dentin

Explanation: Cementum has the highest fluoride concentration among the main mineralized dental tissues.