Histology of Teeth I Questions and
Answers (Solved Papers).
What is the primary embryonic origin of the ectomesenchyme, which contributes to the formation of
dental tissues such as the pulp, dentin, and cementum in the head and neck region? - CORRECT
ANSWERS Neural crest cells derived from the ectoderm
During the bell stage of tooth development, which two specialized cell types differentiate and what are
their respective products? - CORRECT ANSWERS Ameloblasts producing enamel and
odontoblasts producing dentin
Which stage of tooth development is characterized by histo-differentiation, leading to the conversion of
cells into specialized cells like ameloblasts and odontoblasts, and morpho-differentiation, where the
future shape of the tooth crown is determined? - CORRECT ANSWERS Bell stage
Which enamel matrix protein is described as the most abundant extracellular protein in developing
dental enamel, is rich in leucine, histidine, proline, and glutamyl residues, and has been associated with
hypoplastic or hypomineralized enamel when mutated (e.g., in X-linked Amelogenesis Imperfecta)? -
CORRECT ANSWERS Amelogenin
Regarding the general facts of tooth eruption, which statement is consistently supported by the
sources? - CORRECT ANSWERS Mandibular teeth usually erupt before maxillary teeth
What is the hardest substance (most mineralized) in the human body? - CORRECT ANSWERS
enamel
Enamel is not alive, so it... - CORRECT ANSWERS can't regenerate (rebuild)
,What is enamel's biggest enemy? - CORRECT ANSWERS acids
What helps remineralize enamel? - CORRECT ANSWERS fluoride
Is enamel mostly organic or inorganic? - CORRECT ANSWERS inorganic
What provides a protective foundation around the tooth? - CORRECT ANSWERS dentin
Dentin contains ______________ that transmit sensations - CORRECT ANSWERS microscopic
tubules
Dentin continues to _______ and _______ throughout life - CORRECT ANSWERS grow and
regenerate
__________ is responsible for tooth sensitivity and is softer than enamel - CORRECT ANSWERS
dentin
Dentin has a ___________ hue which affects the overall color of teeth - CORRECT ANSWERS
yellowish
What is the living core and alarm system of the tooth? - CORRECT ANSWERS pulp
What component of the tooth creates new dentin? - CORRECT ANSWERS pulp
A tooth can *_________* without its pulp - CORRECT ANSWERS survive
Where do the nerve endings reside? - CORRECT ANSWERS pulp
, What anchors the teeth to the jawbone? - CORRECT ANSWERS cementum
Cementum is similar to bone but lacks... - CORRECT ANSWERS blood vessels
The wear or loss of __________ can cause sensitivity - CORRECT ANSWERS cementum
Enamel is derived from the... - CORRECT ANSWERS ectoderm (its the product of epithelial
cells)
Cementum is derived from the... - CORRECT ANSWERS neuro-mesenchyme
Which component protects the inner dentin and pulp from damage, wear, and chemical forces caused
by chewing and temperature? - CORRECT ANSWERS enamel
Which component provides a point of attachment for the periodontal ligament fibers, which anchor the
tooth the jawbone? - CORRECT ANSWERS cementum
Cementum can regenerate to a limited extent if needed, such as... - CORRECT ANSWERS in the
case of minor resportion or wear
Odontogenesis - CORRECT ANSWERS the process whereby a tooth develops from a few cells in
the primitive oral cavity to an erupted tooth with crown and root
Teeth begin developing at... - CORRECT ANSWERS week 6-7 in utero
The germ layer origin of enamel is... - CORRECT ANSWERS oral ectoderm
Answers (Solved Papers).
What is the primary embryonic origin of the ectomesenchyme, which contributes to the formation of
dental tissues such as the pulp, dentin, and cementum in the head and neck region? - CORRECT
ANSWERS Neural crest cells derived from the ectoderm
During the bell stage of tooth development, which two specialized cell types differentiate and what are
their respective products? - CORRECT ANSWERS Ameloblasts producing enamel and
odontoblasts producing dentin
Which stage of tooth development is characterized by histo-differentiation, leading to the conversion of
cells into specialized cells like ameloblasts and odontoblasts, and morpho-differentiation, where the
future shape of the tooth crown is determined? - CORRECT ANSWERS Bell stage
Which enamel matrix protein is described as the most abundant extracellular protein in developing
dental enamel, is rich in leucine, histidine, proline, and glutamyl residues, and has been associated with
hypoplastic or hypomineralized enamel when mutated (e.g., in X-linked Amelogenesis Imperfecta)? -
CORRECT ANSWERS Amelogenin
Regarding the general facts of tooth eruption, which statement is consistently supported by the
sources? - CORRECT ANSWERS Mandibular teeth usually erupt before maxillary teeth
What is the hardest substance (most mineralized) in the human body? - CORRECT ANSWERS
enamel
Enamel is not alive, so it... - CORRECT ANSWERS can't regenerate (rebuild)
,What is enamel's biggest enemy? - CORRECT ANSWERS acids
What helps remineralize enamel? - CORRECT ANSWERS fluoride
Is enamel mostly organic or inorganic? - CORRECT ANSWERS inorganic
What provides a protective foundation around the tooth? - CORRECT ANSWERS dentin
Dentin contains ______________ that transmit sensations - CORRECT ANSWERS microscopic
tubules
Dentin continues to _______ and _______ throughout life - CORRECT ANSWERS grow and
regenerate
__________ is responsible for tooth sensitivity and is softer than enamel - CORRECT ANSWERS
dentin
Dentin has a ___________ hue which affects the overall color of teeth - CORRECT ANSWERS
yellowish
What is the living core and alarm system of the tooth? - CORRECT ANSWERS pulp
What component of the tooth creates new dentin? - CORRECT ANSWERS pulp
A tooth can *_________* without its pulp - CORRECT ANSWERS survive
Where do the nerve endings reside? - CORRECT ANSWERS pulp
, What anchors the teeth to the jawbone? - CORRECT ANSWERS cementum
Cementum is similar to bone but lacks... - CORRECT ANSWERS blood vessels
The wear or loss of __________ can cause sensitivity - CORRECT ANSWERS cementum
Enamel is derived from the... - CORRECT ANSWERS ectoderm (its the product of epithelial
cells)
Cementum is derived from the... - CORRECT ANSWERS neuro-mesenchyme
Which component protects the inner dentin and pulp from damage, wear, and chemical forces caused
by chewing and temperature? - CORRECT ANSWERS enamel
Which component provides a point of attachment for the periodontal ligament fibers, which anchor the
tooth the jawbone? - CORRECT ANSWERS cementum
Cementum can regenerate to a limited extent if needed, such as... - CORRECT ANSWERS in the
case of minor resportion or wear
Odontogenesis - CORRECT ANSWERS the process whereby a tooth develops from a few cells in
the primitive oral cavity to an erupted tooth with crown and root
Teeth begin developing at... - CORRECT ANSWERS week 6-7 in utero
The germ layer origin of enamel is... - CORRECT ANSWERS oral ectoderm
