All the questions have been directly picked from Carranza 11th edition
1. Which of the following is stippled?
a)
Marginal
gingiva
b)
Attached
gingiva
c)
Marginal
borders of the interdental papillae
d)
Both b and c
Ans:
b. Attached
gingiva ( Carranza 11th
ed, page 26)
Hint: Stippling
is absent in infants and old aged people. Only the central core
of interdental gingiva and the attached gingiva has stippling.
2.
Masticatory mucosa is present in
a)
gingiva
b)
Covering of
hard palate
c)
dorsum of
tongue
d)
Both a and b
Ans:
d Both a and b(Carranza 11th ed page-12)
Hint: Specialized
mucosa is present in dorsum of tongue
3.
Histological depth of gingival sulcus is
a.0mm b.1.8mm
c.2-3mm
d. None
Ans:
b.1.8mm(Carranza 11th ed page-13)
Ideal
depth of gingival sulcus-0mm (in germ free animal)
Probing
depth (2-3mm)
4.
Interdental col is prone to inflammation because
a.
epithelium is non keratinised
b. Plaque accumulates
c.is
difficult to clean d.
All
Ans;a.
epithelium is non keratinised(Carranza 11th ed page-14)
Hint: Lining of interdental col is derived from non-keratinised
reduced enamel epithelium
5. The
temperature receptors of gingiva are
a.
Argyrophilic fibers
b.Meissner
type corpuscles
c.Kause
type end bulbs
d.All
of the above
Ans:
c Kause type end bulbs ( page 25)
Hint: The following nerve structures are present in the
connective tissue: a meshwork of terminal argyrophilic fibers, some of which
extend into the epithelium; Meissner-type tactile corpuscles; Krause-type end
bulbs, which are temperature receptors; and encapsulated spindles.
6. Melanin
pigmentation of gingiva starts appearing
a.
In first trimester
b.
In second trimester
c.
in third trimester
d.
after birth
Ans:
d Afterbirth ((Carranza 11th ed page 25)
It
may appear in the gingiva as early as 3 hours after birth and often is the only
evidence of pigmentation
7.
Clinically mucogingival junction in palatal mucosa is
a.
scalloped
b. Straight line
c.
Not visible
d. Not present anatomically also
Ans:
c Not visible (page 14)
Hint: The
palatal surface of the attached gingiva in the maxilla blends imperceptibly
with the equally firm and resilient palatal mucosa.
Mucogingival
junction is not visible on the palatal gingiva because both hard palate and
maxillary alveolar process are covered by same type of masticatory mucosa.
8.
The attached gingiva is attached to
a.
Root
b.
Periosteum
c.
both of above
d.
It is a misnomer as it has no attachment.
Ans:
b. periosteum ( page 13)
Hint: It
is firm, resilient, and tightly bound to the underlying periosteum of alveolar
bone
9. Internal basal lamina of junctional epithelium has
a)
type IV
collagen
b)
type VI
collagen
c)
type VIII collagen
d)
type I
collagen
ans:
C type VIII collagen ( page 20)
Hint: Data
also have shown that the basal lamina of the junctional epithelium resembles
that of endothelial and epithelial cells in its laminin content but differs in
its internal basal lamina, which has no type IV collagen.
10.
Odland bodies are absent in
a)
stratum
spinosum
b)
junctional
epithelium
c)
orthokeratinization
d)
parakeratinizatiion
ans:
B (Carranza 11th ed page-16)
Hint: in
junctional epithelium, Lysosome-like bodies also are present, but the absence
of keratinosomes (Odland bodies) and histochemically demonstrable acid
phosphatase, correlated with the low degree of differentiation, may reflect a
low defense power against microbial plaque accumulation in the gingival sulcus.
11.
which of the following is not a clear cell?
a)
Keratinocyte
b)
Merkel cell
c)
Langerhan
cells
d)
Melanocytes
Ans:
A (page 15)
12.
lamina densa is composed of
a)
Type I
Collagen
b)
Type IV
Collagen
c)
Type III
Collagen
d)
Type VII
Collagen
Ans:
B ( page 17)
13.
First group of fibres to be destroyed allowing the junctional epithelium to
migrate apically
a.
Transseptal fibres b.
Dentogingival fibres
c.
Oblique fibres
d. Circular fibres
Ans:
b Dentogingival fibres (page 22)
Hint: Beginning
of periodontitis and pocket formation takes place by destruction of fibres of
dentogingival group.
14.
Rolling technique is used to locate the
a.
Marginal gingiva
b. Interdental papilla
c.
Attached gingiva
d. Mucogingival junction
Ans:
d Mucogingival junction (page )
Hint: It
is done by pushing the adjacent mucosa coronally with a dull instrument.
15.
.Least width of attached gingiva is found on facial aspect of
a.
First premolar
b. Second premolar
c.
Lateral incisor
d. Canine
Ans:
a. First premolar (Carranza 11th ed page-13)
Hint: Width
of attached gingiva is greatest in the incisor region.
·
Maxilla
(3.5-4.5mm)
·
Mandible
(3.3-3.9mm)
·
Width of
attached gingiva is least in the first premolar region
·
Maxilla-1.9mm
·
Mandible-1.8mm
16.
Birkbeck’s granules are characteristic features of which cells of gingival
epithelium?
a.
Merkel’s cells
b. Melanocytes
c.
Langhans cells d. Langerhans cells
Ans:
d. Langerhans cells(Carranza 11th ed page-17)
Hint: Langerhans
cells are dendritic cells located among keratinocytes at all suprabasal levels.
They contain elongated g-specific granules (Birkbeck’s granules).
17.Thickness
of basement membrane is in the range
a.
100-200 Angstrom
b.
200-300 Angstrom
c.300-400
Angstrom
d.400-500
Angstrom
Ans:c300-400Angstrom(Carranza
11th ed page-17)
18.
Which keratin polypeptides are present in junctional epithelium but absent in
keratinised epithelium?
a.K4
b.K5
c.K14
d.K19
Ans:
d.K19(Carranza 11th ed page-20)
19.
The physiologic dimension of junctional epithelium and connective tissue
attachment is termed as
a.
Biologic band
b. Biologic length
c.
Biologic width
d. Both b and c
Ans
:c Biologic width
Hint: Average
biologic width is 2.04mm
20.Dentogingival
unit comprises
a.
gingival fibres
b.
Gingival fibres and junctional epithelium
c.
Periodontal ligament and fibres d.
None
Ans:
Gingival fibres and junctional epithelium(Carranza 11th ed page-20)
Hint: Gingival
fibres and the junctional epithelium are together considered as the
dentogingival unit.
21.Gingiva
in children is
a.
more keratinised and more stippled b. more
keratinised, less stippled
c.
Less keratinised, more stippled d. Less
keratinised, less stippled
Ans;
d. Less keratinised, less stippled(Carranza 11th ed page-26)
Hint: Stippling
in children appears at the age of 3-5 years and appears reddish due to
lesser keratinisation and increased vascularity.
22.Gingiva
is supplied by
a.
Supraperiosteal vessels
b.
Subperiosteal vessels
c.
Apical vessels
d. All of the above
Ans:
a Supraperiosteal vessels(Carranza 11th ed page-24)
23.
Periodontal ligament has the shape of
a.
Hourglass
b. triangular
c.
Circular d.
Rocket shaped
Ans:
a. Hourglass
24.Periodontal
ligament is widest at the
a.
Alveolar crest
b. Apical region
c.
Fulcrum of rotation
D. Midroot section
Ans:
a. Alveolar crest
Hint: Periodontal
ligament is widest at the cervical region, reverse to that of cementum which is
widest at the apex.
25.Sharpey’s
fibres are
a. Collagen fibres
b. elastic fibres
c.
Oxytalan fibres
d. All of the above
Ans:
a. Collagen fibres(Carranza 11th ed page-28)
Hint: Collagen
fibres in periodontal ligament are predominantly of Type I. Type IV is the
constituent of basal lamina which has Chicken
wire configuration.
26.Thickness
of periodontal ligament varies between
a.0.1-0.25mm b.1-2mm
c.2-3mm
d.2.5-3.5mm
Ans:
a.0.1-0.25mm (Carranza 11th
ed page-28)
27.Distance
between the base of sulcus and the alveolar crest in a healthy periodontium is
a.0.5-1mm
b.1-2mm
c.2-3mm
d.3-4mm
Ans:
b.1-2mm
Hint: The
distance between the apical end of junctional epithelium and the crest of
alveolus remains constant throughout the continuous tooth eruption(1.07mm)
28.Periodontal
ligament is thin at
a.
CEJ
b. Apical region
c.
Fulcrum of rotation
d. Midroot section
Ans
.C Fulcrum of rotation
Hint: Axis
of rotation for single rooted tooth is at the junction of apical and middle
third of root and for multiple rooted tooth it is in the bone between the roots
at furcation.
29.Maximum
resistance to occlusal forces is shown by which fibres
a.
Transseptal fibres
b. Horizontal fibres
c.
Oblique fibres d.
Apical fibres
Ans:
c. Oblique fibres(Carranza 11th ed page-29)
Hint: These
fibres resist forces along the long axis of tooth.
30. Cementum is
a. Vascular
b. Avascular
c. vascular in some parts and avascular in some
d. None
Ans: b Avascular(Carranza
11th ed page-33)
Hint: Cementum is calcified avascular tissue
31.The
main form of cementum found on the cervical third of the root
a.
Acellular afibrillar cementum
b.
Acellular extrinsic fibre cementum
c.
Cellular mixed stratified cementum
d.
Cellular intrinsic fiber cementum
Ans:
b Acellular extrinsic fiber cementum(Carranza 11th ed page-34)
32.Cementum
found in resorption lacunae
a.
Acellular afibrillar cementum
b.
Acellular extrinsic fiber cementum
c.
Cellular mixed stratified cementum
d.
Cellular intrinsic fiber cementum(Carranza 11th ed page-34)
Ans:
d Cellular intrinsic fiber cementum
33.Cemental
tears occur in
a.
Deep bite
B.
Clenching
c.
Root planing
d.
Trauma
Ans;
d Trauma
Hint: Cemental tears are fractured cemental fragments that occur due to sudden rotational forces.
34.Cementum
is thickest at
a.
Apical third
b. Coronal third
c.
Furcation area d.
Middle third
Ans:
a Apical third
Hint: Cementum
attains its greatest thickness at the apical third (up to 150-200microns) at
the apical third.
35.
Which of the following is not a cause of hypercementosis?
a.
Paget's disease
b.
periapical infection
c.
missing antagonist
d.
Scleroderma
Ans:
d Scleroderma
36.Collagen
fibers are absent in
a.
acellular extrinsic fiber cementum
b.
acellular afibrillar cementum
c.
Mixed stratified cementum
d.
Intermediate cementum
Ans:
b. Acellular afibrillar cementum(Carranza 11th ed page-34)
37.Which
fibers are consistent and constructed even after the destruction of the
alveolar bone
a.
Apical
b. Alveolar crest group
c.
Oblique
d. transseptal
Ans:
d transseptal fibers(Carranza 11th ed page-29)
Hint: Transseptal fibers are considered as both gingival and periodontal fibers that are not attached to alveolar bone.
38.
The least stable periodontal tissue is
a.
Gingiva
b.
Periodontal ligament
c.
Cementum
d.
Alveolar bone
Ans:
d Alveolar bone
39.Cribriform
plate is formed due to
a.
Vascular channels
b.
Sharpey’s fibers
c.
Collagen fibrils
d.
Nerve fibrils
Ans:
a Vascular channels
Hint: Alveolar
bone proper being perforated by numerous vascular channels forms Cribiform
plate.
40.Alveolar
bone is
a.
Compact bone b.
Cancellous bone
c.
Spongy bone
d. None of the above
Ans:
a Compact bone(Carranza 11th ed page-38)
Hint: Alveolar process consists of external plate of compact bone and Inner socket wall of compact bone called as alveolar bone proper. Cancellous or spongy trabecular bone between these two. So it is predominantly compact bone.
41.Type
of bone present in interradicular area is predominantly
a.
Cortical
b. Cancellous
c.
osteophytic
d. None of the above
Ans:
b. Cancellous bone(Carranza 11th ed page-38)
Hint: Cancellous
bone is found predominantly in interradicular and interdental areas.
42.Dehiscence
is
a.
A vertical defect of alveolar bone
b.
Influences progression of disease
c.
Is common in anterior teeth with prominent roots
d.
All of the above
Ans:
a A vertical defect in alveolar bone(Carranza 11th ed page-42)
Hint: Fenestration
are window -like defects which do not involve the alveolar bone.
43.Dehiscence
occur more frequently on
a.
labial side
b.
lingual side
c.
mesial side
d.
distal side
Ans:
a Labial side(Carranza 11th ed page-42)
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