ORAL BIOLOGY

Floor of mouth is an example of
a)Masticatory mucosa
b)Specialized mucosa
c)Loosly attached linning mucosa
d)firmly attached linning mucosa
e)Both c & d

Which of the following has heighest turn over rate
a)Skin
b)sulcular epithelium
c)Gut
d)Gingiva
e)cheek

Keratohyaline granules if feature of
a)Prickle cell layer
b)Keratinized layer
c)Intermediate layer
d)Granular layer
e)Superficial layer

Black hairy tongue is due to hyperkeratinization of
a)Filliform papillae
b)Folliate papillae
c)Fungiform papillae
d)Circumvallate papillae

Regarding bone
a)Is a mineralized connective tissue
b)supports & is reservoir of minerals
c)Resists compressive forces best
d)Resists tensile forces best
e)Mainly contain type 1 collagen

Regarding function of bone cells
a)Osteocytes responsible to support bone architecture
b)Osteoblasts maintain Ca hemostasis
c)Osteoclasts resorbs bone
d)osteocytes responsible for mineralization of osteoid
e)Osteoprogenitor cells located in periosteum & endosteum

Components of haversian system
a)Osteoblasts
b)Lamellae
c)Lacunae
d)Canaculi
e)Osteocyte

Which type of movement occurs on working side upon chewing
a)Rotational
b)Translational
c)Both occurs at same time
d)Both occurs one after other

Regarding condylar movement of Condyle
a)Working condyle moves slight lateral
b)Balancing condyle moves forward, downward, inward
c)Bennet movement seen on working side condyle
d)Bennet angle seen on working side condyle

Regarding ligament of temporpmandibular joint
a)Sphenomandibular ligament is residual of perichondrium of meckel's cartilage
b)Temporomandibular ligament arise from sphenoid and insert on lingula
c)Sphenomandibular ligament limit the amount of inferior and posterior displacement
d)stylomandibular ligament prevent lateral and medial dislocation of joint
e)Sphenomandibular ligament divides parotid and submandibular gland

Regarding capsule of Temporomandibular joint
a)Fibrous non elastic membrane
b)Provides stability and seals the joint cavity
c)Upper part of capsule consists of fibrous and elastic tissue
d)Lower part contains non elastic fibers only
e)Contains cellular and vascular layer

When dentine in routinely deminerelaized which of the following dentine demineralizes first
a) intertubular dentine
b) predentine
c) peritubular dentine
d) interglobular dentine
The principal role of odontoblast process in predentine is
a)modification of matrix
b)mineralization of matrix
c)secretion of matric
d)all of them

Statements about enamel tufts
1)Commonly seen in inner one third of enamel
2)Perpendicular to EDJ.
3)Recur at 100μm interval along EDJ4)Best visualized in transverse section.

a)1,2,3 are true statements
b)1,2,4 are true statements
c)Only 1 is true statement
d)3,4 are true statement
e)All are true statements