NDHCE part 1 Exam Questions With Correct
Answers
The |tissue(s) |that |have |nerve |innervations |are |
a. |Dentin |
b. |Pulp |and |dentin |
c. |Pulp |and |periodontal |ligaments |
d. |Cementum |
e. |All |of |the |above |- |CORRECT |ANSWER✔✔-c. |Pulp |and |periodontal |ligaments
Free, |unmyelinated |nerve |endings |of |the |pulp |can |sense: |
a. |hot |
b. |cold
c. |pressure |
d. |pain |
e. |all |of |above |- |CORRECT |ANSWER✔✔-d. |pain |
The |free |unmyelinated |nerve |endings |of |the |pulp |tissue |can |sense |pain |only. |It |cannot |
distinguish |between |hot |or |cold. |It |cannot |distinguish |the |sensation |of |pressure. |All |stimuli |are
|interpreted |as |a |pain |perception. |The |encapsulated |nerve |endings |are |responsible |for |
registering |pressure |changes
nonsuccedaneous |permanent |molars |develop |from |tooth |buds |that |frow |from
a. |a |successional |dental |lamina |
b. |primary |tooth |buds
c.the |posterior |part |of |the |palatal |shelves |
,d. |extension |of |the |primary |second |molar's |dental |lamina |- |CORRECT |ANSWER✔✔-d. |
extension |of |the |primary |second |molar's |dental |lamina |
Six |permanent |molars |per |dental |arch |develop |from |a |posterior |extension |of |the |dental |lamina
What |is |the |angled |part |of |the |ameloblast |that |secretes |the |enamel |matrix?
a. |inner |enamel |epithelium |
b. |repolarized |pre |ameloblasts |
c. |tomes |process |
d. |disintegrating |basement |membrane. |- |CORRECT |ANSWER✔✔-c. |tomes |process
The |pink |labial |mucosa |or |buccal |mucosa |meets |the |redder______ |at |the |mucobucccal |fold |
a. |marginal |gingiva
b. |attached |gingiva |
c. |alveolar |mucosa |- |CORRECT |ANSWER✔✔-c. |alveolar |mucosa |
The |pink |labial |mucosa |or |buccal |mucosa |meets |the |redder |alveolar |mucosa |at |the |
mucobuccal |fold |deep |with |the |vestibular |fornix.
The |outer |cells |of |the |dental |papilla |are |induced |to |differentiate |during |tooth |development |
a. |pulp |tissue |
b. |preameloblasts |
c. |odontoblasts
d. |cementoblasts |- |CORRECT |ANSWER✔✔-c. |odontoblasts
Outer |cells |differentiate |into |dentin-secreting |cells, |odontoblasts
Which |stage |of |tooth |formation |occurs |for |the |primary |dentition |during |the |eleventh |and |
twelfth |week |of |prenatal |development?
,a. |bell |stage |
b. |initiation |stage
c. |cap |stage
d. |bud |stage |- |CORRECT |ANSWER✔✔-a. |bell |stage |
The |eleventh |and |twelfth |week |of |prenatal |development |is |the |fourth |stage |of
Odontogenesis |the |Bell |Stage
What |is |the |connective |tissue |derived |from |during |prenatal |development?
a. |ectoderm |
b. |endoderm |
c. |neural |crest |cells
d. |mesoderm |- |CORRECT |ANSWER✔✔-d. |mesoderm
Enamel |______ |forms |the |crystalline |structural |units |of |enamel?
a. |Tubles |
b. |granules |
c. |rods
d. |cuticles |- |CORRECT |ANSWER✔✔-c. |rods
The |patient's |mother |was |informed |that |multiple |carious |lesion |caries |on |her |maxillary |molars |
had |progressed |into |the |dentin. |Caries |in |the |dentin |of |the |tooth |progresses |through |the
a. |interglobular |dentin |
b. |dentinal |tubule |
c. |secondary |dentin |
d. |predentin |- |CORRECT |ANSWER✔✔-b. |dentinal |tubule |
Bacteria |smaller |than |dentinal |tubules |enter |the |tubules |and |destroy |the |odontoblastic |
processes |(dentinal |fibers) |and |follow |the |course |to |pulp.
, Enamel |hypocalcification |is |a |type |of |enamel |dysplasia |that |involves:
a. |an |increased |number |of |ameloblasts |
b. |reduction |in |the |quantity |of |enamel |matrix
c. |grooves |and |pitting |on |the |enamel |surface
d. |interference |in |the |metabolic |- |CORRECT |ANSWER✔✔-b. |reduction |in |the |quantity |of |
enamel |matrix
During |4th |week |of |embryonic |life, |the |tongue |develops |from |several |swellings |arising |on |the |
internal |aspects |of |the |brachial |arches |1-4. |Which |swelling |from |the |body |of |the |tongue. |
a. |Branchial |arch |1
b. |branchial |arches |2, |3 |and |part |of |4 |
c. |branchial |arches |4 |
d. |thyroid |gland |- |CORRECT |ANSWER✔✔-A. |Branchial |arch |1 |forms |two |lateral |swellings |and |
one |medial |swelling |(tuberculum |impar) |to |form |the |body |of |the |tongue
What |histologic |structures |comprise |healthy |attached |gingiva |
a. |circular |fibers |
b. |rete |pegs |
c. |connective |tissue |papilla |
d. |fibroblasts |
e. |all |of |the |above. |- |CORRECT |ANSWER✔✔-e. |all |of |the |above
A. |Gingiva |contains |circular |fiber |or |circumferential |fibers |that |envelop |each |tooth |separately |
within |the |free |gingiva.
B. |Attached |gingiva |is |composed |of |orthokeratinized |stratified |squamous |epithelium. |
Epithelium |is |not |vascularized |and |depends |on |the |underlying |connective |tissue |for |
nourishment; |the |epithelium |interfaces |with |underlying |connective |tissue |to |enhance |this |
nourishment. |Epithelial |extensions |into |connective |tissue |are |called |ridges |or |rete |pegs. |This |
rete |peg |arrangement |produces |the |clinical |appearance |of |stippling.
Answers
The |tissue(s) |that |have |nerve |innervations |are |
a. |Dentin |
b. |Pulp |and |dentin |
c. |Pulp |and |periodontal |ligaments |
d. |Cementum |
e. |All |of |the |above |- |CORRECT |ANSWER✔✔-c. |Pulp |and |periodontal |ligaments
Free, |unmyelinated |nerve |endings |of |the |pulp |can |sense: |
a. |hot |
b. |cold
c. |pressure |
d. |pain |
e. |all |of |above |- |CORRECT |ANSWER✔✔-d. |pain |
The |free |unmyelinated |nerve |endings |of |the |pulp |tissue |can |sense |pain |only. |It |cannot |
distinguish |between |hot |or |cold. |It |cannot |distinguish |the |sensation |of |pressure. |All |stimuli |are
|interpreted |as |a |pain |perception. |The |encapsulated |nerve |endings |are |responsible |for |
registering |pressure |changes
nonsuccedaneous |permanent |molars |develop |from |tooth |buds |that |frow |from
a. |a |successional |dental |lamina |
b. |primary |tooth |buds
c.the |posterior |part |of |the |palatal |shelves |
,d. |extension |of |the |primary |second |molar's |dental |lamina |- |CORRECT |ANSWER✔✔-d. |
extension |of |the |primary |second |molar's |dental |lamina |
Six |permanent |molars |per |dental |arch |develop |from |a |posterior |extension |of |the |dental |lamina
What |is |the |angled |part |of |the |ameloblast |that |secretes |the |enamel |matrix?
a. |inner |enamel |epithelium |
b. |repolarized |pre |ameloblasts |
c. |tomes |process |
d. |disintegrating |basement |membrane. |- |CORRECT |ANSWER✔✔-c. |tomes |process
The |pink |labial |mucosa |or |buccal |mucosa |meets |the |redder______ |at |the |mucobucccal |fold |
a. |marginal |gingiva
b. |attached |gingiva |
c. |alveolar |mucosa |- |CORRECT |ANSWER✔✔-c. |alveolar |mucosa |
The |pink |labial |mucosa |or |buccal |mucosa |meets |the |redder |alveolar |mucosa |at |the |
mucobuccal |fold |deep |with |the |vestibular |fornix.
The |outer |cells |of |the |dental |papilla |are |induced |to |differentiate |during |tooth |development |
a. |pulp |tissue |
b. |preameloblasts |
c. |odontoblasts
d. |cementoblasts |- |CORRECT |ANSWER✔✔-c. |odontoblasts
Outer |cells |differentiate |into |dentin-secreting |cells, |odontoblasts
Which |stage |of |tooth |formation |occurs |for |the |primary |dentition |during |the |eleventh |and |
twelfth |week |of |prenatal |development?
,a. |bell |stage |
b. |initiation |stage
c. |cap |stage
d. |bud |stage |- |CORRECT |ANSWER✔✔-a. |bell |stage |
The |eleventh |and |twelfth |week |of |prenatal |development |is |the |fourth |stage |of
Odontogenesis |the |Bell |Stage
What |is |the |connective |tissue |derived |from |during |prenatal |development?
a. |ectoderm |
b. |endoderm |
c. |neural |crest |cells
d. |mesoderm |- |CORRECT |ANSWER✔✔-d. |mesoderm
Enamel |______ |forms |the |crystalline |structural |units |of |enamel?
a. |Tubles |
b. |granules |
c. |rods
d. |cuticles |- |CORRECT |ANSWER✔✔-c. |rods
The |patient's |mother |was |informed |that |multiple |carious |lesion |caries |on |her |maxillary |molars |
had |progressed |into |the |dentin. |Caries |in |the |dentin |of |the |tooth |progresses |through |the
a. |interglobular |dentin |
b. |dentinal |tubule |
c. |secondary |dentin |
d. |predentin |- |CORRECT |ANSWER✔✔-b. |dentinal |tubule |
Bacteria |smaller |than |dentinal |tubules |enter |the |tubules |and |destroy |the |odontoblastic |
processes |(dentinal |fibers) |and |follow |the |course |to |pulp.
, Enamel |hypocalcification |is |a |type |of |enamel |dysplasia |that |involves:
a. |an |increased |number |of |ameloblasts |
b. |reduction |in |the |quantity |of |enamel |matrix
c. |grooves |and |pitting |on |the |enamel |surface
d. |interference |in |the |metabolic |- |CORRECT |ANSWER✔✔-b. |reduction |in |the |quantity |of |
enamel |matrix
During |4th |week |of |embryonic |life, |the |tongue |develops |from |several |swellings |arising |on |the |
internal |aspects |of |the |brachial |arches |1-4. |Which |swelling |from |the |body |of |the |tongue. |
a. |Branchial |arch |1
b. |branchial |arches |2, |3 |and |part |of |4 |
c. |branchial |arches |4 |
d. |thyroid |gland |- |CORRECT |ANSWER✔✔-A. |Branchial |arch |1 |forms |two |lateral |swellings |and |
one |medial |swelling |(tuberculum |impar) |to |form |the |body |of |the |tongue
What |histologic |structures |comprise |healthy |attached |gingiva |
a. |circular |fibers |
b. |rete |pegs |
c. |connective |tissue |papilla |
d. |fibroblasts |
e. |all |of |the |above. |- |CORRECT |ANSWER✔✔-e. |all |of |the |above
A. |Gingiva |contains |circular |fiber |or |circumferential |fibers |that |envelop |each |tooth |separately |
within |the |free |gingiva.
B. |Attached |gingiva |is |composed |of |orthokeratinized |stratified |squamous |epithelium. |
Epithelium |is |not |vascularized |and |depends |on |the |underlying |connective |tissue |for |
nourishment; |the |epithelium |interfaces |with |underlying |connective |tissue |to |enhance |this |
nourishment. |Epithelial |extensions |into |connective |tissue |are |called |ridges |or |rete |pegs. |This |
rete |peg |arrangement |produces |the |clinical |appearance |of |stippling.
