461.The reduced enamel epithelium is derived from:
A.Maturativeameloblasts and stratum intermedium.
B. Stratum intermedium, stellate reticulum and outer dental epithelium.
C. Stratum intermedium, stellate reticulum and inner epithelium.
D. Protective ameloblasts, stratum intermedium, stellate reticulum and outer dental epithelium.

462.Which of the following is not component of the enamel organ?
A.Ameloblasts.
B. Odontoblasts.
C. Outer enamel epithelium.
D. Stratum intermedium.

463. Which of the following indicates the major components of a tooth germ?
A. The dental lamina, the stellate reticulum and the stratum intermedium.
B. The dental organ, the dental papilla and the dental sac.
C. The dental pulp, the dental sac and the dental lamina.
D. The cervical loop, Hertwig’s sheath and the inner enamel epithelium.

464. Which of the following is not ectodermal in origin?
A.Epithelial rests of Malassez.
B.Anterior pituitary gland.
C.Stellate reticulum.
D. Enamel spindles.

465. Which of the following appear FIRST in a developing tooth?
A.Predentin.
B.Cementoid.
C. Tome’s process.
D. Secondary dentin.

466. The last hard dental tissue to be deposited is:
A.Enamel.
B.Outer layers of cementum.
C.Mantle dentin.
D. Primary dentin.

467. Which of the following is associated with an erupted tooth?
A.Outer Enamel epithelium.
B.Cervical loop.
C.Epithelial rests of Malassez.
D.Stratum intermedium.

468. Which of the following is not true of Hertwig’s epithelial root sheath?
A.It lacks a stellate reticulum.
B.It is derived from stomodeal ectoderm.
C.Its remnants form epithelial rests.
D.It remains intact until a layer of cementum has been formed.

469. Which of the following contain blood vessels?
A.Cartilage.
B.Enamel.
C.Dental lamina.
D.Dental sac.

470. Which group of structures is entirely derived from the dental sac?
A.Dentin, pulp, cementum.
B.Cementum, alveolar bone, pulp.
C.Cementum, enamel, pulp.
D.Periodontal ligament, cementum, alveolar bone.

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