MCQs on Periodontal Ligament - Oral Histology Part 3

# Periodontal fibers joining cemental surface of one tooth, to cemental surface of adjacent tooth are called:
A. Gingivodental
B. Cemental fibers
C. Horizontal fibers
D. Transseptal fibers

# Sharpey's fibers are present in:
A. Bone
B. Periosteum
C. Periodontal ligament
D. All of the above

# Interdependency of osteoblasts and osteoclasts in bone remodelling is called as:
A. Lacunae
B. Coupling
C. Reversal lines
D. Canaliculi

# True about osteoclasts:
A. Monocytes are precursor cells of osteoclasts
B. The plasma membrane of osteoclasts adjacent to bone that is being resorbed is known as striated or ruffled border
C. Contain lysosomes with acid phosphates
D. All of the above are true

# Periodontal ligament is made up of :
A. Type I collagen
B. Type I and Type III collagen
C. Type I and Type II collagen
D. Type I and Type IV collagen

# Which of the following is correct ?
A. Fibronectin helps in attachment of fibroblasts to collagen
B. Cementicles are found in periodontal ligament of older individuals
C. The large nerve fibers are myelinated and are concerned with discernment of touch
D.The small nerve fibers may or may not be myelinated and are concerned with discernment of pain
E. All of the ABOVE
# Cementicles are found in the:
A. Gingiva
B. Periodontal ligament
C. Alveolar bone
D. Cementum

# The most abundant group of fibers in the PDL are:
A. Trans septal
B. Horizontal
C. Oblique
D. Apical

# Width of the Periodontal ligament is least at:
A. Cervical third
B. Apical third
C. Fulcrum of rotation
D. It has uniform width

# The rests of Malassez in the periodontal ligament are derived from:
A. Dental pulp
B. Lamina propria
C. Odontogenic epithelium
D. Vestibular lamina

# Development of supporting tissues of the tooth is initiated by :
A. Cells of dental follicle
B. Cells of odontogenic layer
C. Cementoblasts
D. Cells of the gingiva

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MCQs on Periodontal Ligament - Oral Histology part 2

# Width of PDL is :
A. O.10 mm
B. 0.50 mm
C. 0.25 mm
D. 0.75 mm

# Intermediate Plexus is seen in the:
A. Cementum
B. PDL
C. Pulp
D. Dentin

# In mammals independent and tough suspension for teeth is provided by:
A. Alveolar sockets
B. Cementum
C. Gubernacular cords
D. Periodontal membrane

# Bone adjacent to periodontal ligament that contains a great number of Sharpey's fibers is known as :
A. Lamina dura
B. Bundle bone
C. Lamina propria
D. Lamina densa

# The most abundant principal fiber group in periodontal ligament is :
A. Horizontal
B. Transseptal
C. Apical
D. Oblique

# Collagen biosynthesis occurs inside the :
A. Chondroblasts
B. Odontoblasts
C. Osteoblasts
D. Fibroblasts

# Which of the following groups of fibers are not attached to alveolar bone ?
A. Apical
B. Horizontal
C. Oblique
D. Transseptal
# Principal fibers of PDL are attached to :
A. Alveolar bone proper
B. Bundle bone
C. Lamellar bone
D. Cortical bone

# Periodontal ligament has predominantly:
A. Type II collagen fibers
B. Oxytalan fibers
C. Elastic fibers
D. Type I collagen fibers

# The calcified mass found in PDL are:
A. Cementicles
B. Osteoblasts
C. Cementoclasts
D. Osteoclasts

# Sharpey's fibers are derived from:
A. Hertwig's root sheath
B. Epithelial rest cells of Malassez
C. Alveolar bone
D. Dental follicle

# Intermediate plexus is absent in which of the following principal fibers:
A. Gingival
B. Oblique
C. Horizontal
D. Transseptal

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MCQs on Periodontal Ligament - Oral Histology Part 1

# Which of the following cells are the predominant connective tissue cells of the periodontal ligament?
A. Cementoblasts
B. Fibroblasts
C. Osteoblasts
D. Cell rests of Malassez

# The periodontal ligament:
A. Derives its blood primarily from the branches of vessels entering the pulp
B. Has a slow rate of turn over
C. Contains epithelial cells
D. Comprises primarily of type II collagen

# Which of the following is not the principal fiber group of the periodontal ligament ?
A. Horizontal
B. Oblique
C. Alveolar crest
D. Trans septal

# Anchoring fibrils are composed of:
A. Type V and VII collagen
B. Type I and III collagen
C. Type IV collagen
D. Type IV and III collagen

# Collagen molecule exhibits all of the following features EXCEPT :
A. Triple plated sheath
B. Mostly contains glycine residues
C. Exhibit cross striations at 64 micrometer
D. Intracellular in nature

# Remnants of Hertwig's root sheath are found in :
A. Gingiva
B. Alveolar bone
C. Cementum
D. Periodontal Ligament
# Age changes in the periodontal ligament include which of the following ?
A. Increased fibroplasia
B. Increased vascularity
C. Increased thickness
D. Decrease in the number of cementicles

# All of the following cells of periodontal ligament are of mesenchymal origin EXCEPT:
A. Fibroblasts
B. Multi totipotent cells
C. Cementoblasts
D. Cell rests of Malassez

# The attachment apparatus of tooth is composed of:
A. Gingiva,cementum and alveolar bone
B. Gingiva and cementum
C. Cementum and periodontal ligament
D. Periodontal ligament, cementum and alveolar bone

# The vascular supply of the periodontal ligament is :
A. Greatest in the middle third of a single rooted tooth
B. Greatest in the middle third of a multirooted tooth
C. A net-likee plexus that runs closer to the cementum than to the bone
D. A net-like plexus that runs closer to the bone than to the cementum

# Fibers of the periodontal ligament embedded in the bone are:
A. Sharpey's fibers
B. Tome's fibers
C. Elastic fibers
D. Ray's fibers

# Group of fibers, which resist the masticatory forces are:
A. Dentogingival
B. Transseptal
C. Oblique
D. Horizontal

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MCQs on Diseases of Salivary Glands - Oral Pathology Part 3

# Spindle cell carcinoma is a variant of :
A. Pleomorphic adenoma
B. Adenoid cystic carcinoma
C. Basal cell carcinoma
D. Squamous cell carcinoma

# Commonest site for ectopic salivary gland tumor is :
A. Tongue
B. Cheek
C. Palate
D. Neck

# Chemical Mumps is synonymous with:
A. Epidemic parotitis
B. Iodine mumps
C. Nutritional mumps
D. Nonspecific mumps

# Break up time (BUT) test is done in :
A. Sjogren's syndrome
B. Multiple sclerosis
C. SLE
D. Myasthenia gravis

# Salivary duct calculi :
A. Produce pain on eating
B. Are commonest in the parotid ducts
C. Are common cause of acute parotitis
D. Are associated with hypercalcemic states

# Sialoliths are stones found in the salivary duct and gland and are primarily composed of:
A. Hydroxyapatite
B. Potassium chloride
C. Unknown compounds of phosphates
D. Calcium chloride

# In Xerostomia, the salivary pH is:
A. Unaffected
B. Low
C. High
D. Increased in morning and decreased in day

# Pleomorphic adenoma is :
A. a teratomatous tumour of the salivary gland
B. a neuroendocrine cell tumour
C. multiple ectopic tissue proliferating in the salivary gland
D. myoepithelial or ductal reserve cell origin

# Which of the following statements about Sjogren's Syndrome is incorrect ?
A. MRI shows salt and pepper appearance
B. Lacrimal gland enlargement is common
C. Minor salivary gland biopsy is a diagnostic test
D. Pilocarpine is the most useful and convenient drug in its treatment


# Chocolate colored fluid is seen in the cystic space of:
A. Dentigerous cyst
B. Odontogenic keratocyst
C. Unicystic ameloblastoma
D. Papillary cystadenoma lymphomatosum

# Intra oral pleomorphic adenoma usually occurs in:
A. Buccal mucosa
B. Upper lip
C. Floor of the mouth
D. Palate

# A salivary gland tumor, which histologically shows a double layer of epithelial cells based on a reactive lymphoid stroma is:
A. Pleomorphic adenoma
B. Mucoepidermoid carcinoma
C. Acinic cell tumor
D. Warthin tumor

# Sjogren's syndrome affects :
A. Exocrine glands
B. Paracrine glands
C. Endocrine glands
D. Autocrine glands

# In which of the following salivary gland tumors, the tumor is composed of "intermediate cells" histologically ?
A. Adenoid cystic carcinoma
B. Mucoepidermoid carcinoma
C. Pleomorphic adenoma
D. Warthin's tumor

# Which of the following salivary gland tumors has highest rate of malignant transformation ?
A. Parotid
B. Submandibular
C. Sublingual
D. Minor

# The following are the high grade salivary malignancies , EXCEPT :
A. Basal cell adenocarcinoma
B. Mucoepidermoid carcinoma
C. Adenoid cystic carcinoma
D. Salivary duct carcinoma

# Treatment for recurrent ranula is :
A. Incision
B. Excision
C. Excision with adjacent glands
D. Marsupialization

# Sialography of normal salivary gland reveals the ductal architecture as having an appearance of :
A. Sausage string
B. Fruit-laden tree
C. Leafless tree
D. Ball in hand

# Microscopically, epimyoepithelial islands are typically seen in :
A. Sjogren's syndrome
B. Mucoepidermoid carcinoma
C. Epithelial-myoepithelial carcinoma
D. Myoepithelioma

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