NBDE: Dental Anatomy Exam 2025
Questions and Answers 100% Pass
Cleft Lip and Palate - ✔✔This is the effect of the tetratogens aspirin, valium, dilantin,
and cigarette smoke in infants.
Cytomegalovirus and Toxoplasma - ✔✔These two tetratogens cause microcephaly,
hydrocephaly, and microphthalmia in infants.
Ethyl Alcohol - ✔✔This tetratogen causes central mid-face discrepancy in infants.
Rubella - ✔✔This tetratogen causes microphthalmia, cataracts and deafness in infants.
X-radiation - ✔✔This tetratogen causes microcephaly in infants.
Vitamin D - ✔✔Excess of this tetratogen causes premature suture closure in infants.
Cell-Free Zone (Zone of Weil) - ✔✔This area of dental pulp lies directly subadjacent to
the odontogenic zone; contains numerous bundles of Korff's reticular fibers which
extend into the dentinal layer; also contains many capillaries and nerves.
Cell-Rich Zone - ✔✔This area of dental pulp contains numerous fibroblasts,
undifferentiated mesenchymal cells which can differentiate into odontoblasts,
lymphocytes, plasma cells and eosinophils.
Pulp - ✔✔This tooth layer contains the subodontoblastic plexus of Raschkow at its
innermost part.
Tomes' Process - ✔✔This is the secretory surface of the ameloblast that faces the DEJ.
Tomes' Fibers - ✔✔These are the cytoplastic cell processes of odontoblasts; one is
contained in each dentinal tubule.
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, Amelogenesis - ✔✔This process begins right after the initiation of dentinogenesis and
includes the stages presecretory, secretory, transitional, maturation and post-
maturational.
Unmyelinated - ✔✔Sympathetic autonomic nerve fibers which enter the apex of a tooth
extend from cell bodies in the superior cervical ganglion at the base of the skull with
blood vessels and are (myelinated/unmyelinated); they innervate smooth muscle cells
of the arterioles to regulate blood flow in the capillay network.
Myelinated - ✔✔Afferent sensory fibers which enter the apex of the tooth arise in the
maxillary and mandibular branches CN V and are predominantly
(myelinated/unmyelinated); they may terminate in the central pulp or send small
individual fibers that form the subodontoblastic plexus of Raschkow.
Enamel - ✔✔Lines of Retzius are the incremental lines on
(enamel/dentin/cementum/pulp)
Dentin - ✔✔Imbrication lines of von Ebner are the incremental lines on
(enamel/denin/cementul/pulp)
Arrest and Reversal - ✔✔These two lines represent the incremental lines on both
cementum and alveolar bone
Odontoclasts - ✔✔These cells are the resorptive cells of both enamel and dentin.
Dentin - ✔✔An irritating or painful response to cold, hot or pressure stimuli is usually
carried by sensitivity of which oral tissue?
Pulp Stones (Denticles) - ✔✔These are nodular calcified bodies having organic matrix
which occur frequently in relation to the coronal pulp; two types: true (composed of
dentin and have dentinal tubules) or false (concentric layers of calcified material with
no tubules); and also free, attached, or embedded; increase with advancing age.
Proline - ✔✔Enamel is composed of 1% organic matrix which consists mainly of protein
which is rich in this amino acid:
Tufts - ✔✔These are fan-shaped, hypocalcified structures of enamel rods that project
from the DEJ to the enamel proper; found in the inner 1/3 of enamel; anomaly of
crystalization with no clinical importance: (Tufts/Spindles/Lamellae)
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
Questions and Answers 100% Pass
Cleft Lip and Palate - ✔✔This is the effect of the tetratogens aspirin, valium, dilantin,
and cigarette smoke in infants.
Cytomegalovirus and Toxoplasma - ✔✔These two tetratogens cause microcephaly,
hydrocephaly, and microphthalmia in infants.
Ethyl Alcohol - ✔✔This tetratogen causes central mid-face discrepancy in infants.
Rubella - ✔✔This tetratogen causes microphthalmia, cataracts and deafness in infants.
X-radiation - ✔✔This tetratogen causes microcephaly in infants.
Vitamin D - ✔✔Excess of this tetratogen causes premature suture closure in infants.
Cell-Free Zone (Zone of Weil) - ✔✔This area of dental pulp lies directly subadjacent to
the odontogenic zone; contains numerous bundles of Korff's reticular fibers which
extend into the dentinal layer; also contains many capillaries and nerves.
Cell-Rich Zone - ✔✔This area of dental pulp contains numerous fibroblasts,
undifferentiated mesenchymal cells which can differentiate into odontoblasts,
lymphocytes, plasma cells and eosinophils.
Pulp - ✔✔This tooth layer contains the subodontoblastic plexus of Raschkow at its
innermost part.
Tomes' Process - ✔✔This is the secretory surface of the ameloblast that faces the DEJ.
Tomes' Fibers - ✔✔These are the cytoplastic cell processes of odontoblasts; one is
contained in each dentinal tubule.
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 1
, Amelogenesis - ✔✔This process begins right after the initiation of dentinogenesis and
includes the stages presecretory, secretory, transitional, maturation and post-
maturational.
Unmyelinated - ✔✔Sympathetic autonomic nerve fibers which enter the apex of a tooth
extend from cell bodies in the superior cervical ganglion at the base of the skull with
blood vessels and are (myelinated/unmyelinated); they innervate smooth muscle cells
of the arterioles to regulate blood flow in the capillay network.
Myelinated - ✔✔Afferent sensory fibers which enter the apex of the tooth arise in the
maxillary and mandibular branches CN V and are predominantly
(myelinated/unmyelinated); they may terminate in the central pulp or send small
individual fibers that form the subodontoblastic plexus of Raschkow.
Enamel - ✔✔Lines of Retzius are the incremental lines on
(enamel/dentin/cementum/pulp)
Dentin - ✔✔Imbrication lines of von Ebner are the incremental lines on
(enamel/denin/cementul/pulp)
Arrest and Reversal - ✔✔These two lines represent the incremental lines on both
cementum and alveolar bone
Odontoclasts - ✔✔These cells are the resorptive cells of both enamel and dentin.
Dentin - ✔✔An irritating or painful response to cold, hot or pressure stimuli is usually
carried by sensitivity of which oral tissue?
Pulp Stones (Denticles) - ✔✔These are nodular calcified bodies having organic matrix
which occur frequently in relation to the coronal pulp; two types: true (composed of
dentin and have dentinal tubules) or false (concentric layers of calcified material with
no tubules); and also free, attached, or embedded; increase with advancing age.
Proline - ✔✔Enamel is composed of 1% organic matrix which consists mainly of protein
which is rich in this amino acid:
Tufts - ✔✔These are fan-shaped, hypocalcified structures of enamel rods that project
from the DEJ to the enamel proper; found in the inner 1/3 of enamel; anomaly of
crystalization with no clinical importance: (Tufts/Spindles/Lamellae)
COPYRIGHT © 2025 BY EMILLY CHARLOTTE, ALL RIGHTS RESERVED 2
