MCQs on Diseases of Salivary Glands - Oral Pathology Part 1

# Salivary gland stone most commonly involves:
A. Submandibular gland
B. Parotid gland
C. Sublingual glands
D. Lingual glands

# In the clinical evaluation, the most significant finding of the parotid mass may be accompanying:
A. Rapid progressive painless enlargement
B. Nodular consistency
C. Supramental and preauricular lymphadenopathy
D. Facial paralysis

# Which of the following statements is false?
A. A salivary duct obstruction can cause a unilateral swelling in the floor of the mouth that is largest before a meal and smallest after a meal
B. A lesion termed as ranula is associated with the sublingual salivary gland
C. The sublingual salivary gland is the most common site of salivary gland neoplasia
D. A pleomorphic adenoma is the most common salivary gland neoplasm

# Warthin's tumor is :
A. An adenolymphoma of the parotid gland
B. A pleomorphic adenoma of the salivary gland
C. Carcinoma of the parotid gland
D. None of the above

# The common site for necrotising sialometaplasia is :
A. Cheeks
B. Dorsum of tongue
C. Palate
D. Gingiva

# Pleomorphic adenoma arises from:
A. Myoepithelial cells
B. Acinar cells
C. Connective tissue
D. Stem cells

# Most common salivary gland malignant neoplasm in bones is :
A. Pleomorphic adenoma
B. Adenoid cystic carcinoma
C. Mucoepidermoid carcinoma
D. Adenolymphoma

# Mikulicz's disease is :
A. An inflammatory disease
B. Neoplastic disease
C. An autoimmune disease
D. Viral infection

# Bimanual palpation technique is carried out for:
A. Submandibular gland
B. Sublingual gland
C. Ranula
D. Cervical lymph nodes when they are enlarged due to inflammation

# Non inflammatory , non neoplastic enlargement of the salivary gland is termed as:
A. Sialadenitis
B. Sialosis
C. Ptyalism
D. Sialorrhoea

# Most common tumor of salivary gland is :
A. Pleomorphic adenoma
B. Adenoid cystic carcinoma
C. Cylindrioma
D. Epidermoid carcinoma

# A painful crater-like 1.5 cm ulcer develops within one week on the hard palate mucosa of a 40 year old female. The most likely diagnosis is :
A. Actinomycosis
B. Squamous cell carcinoma
C. Pleomorphic adenoma
D. Necrotizing sialometaplaisa

# A condition of the mouth which increases the caries activity in the oral cavity is :
A. Xerostomia
B. Malignancy
C. Hairy tongue
D. Watery saliva

# Which of the following parotid malignancy shows perineuronal spread ?
A. Pleomorphic adenoma
B. Adenoid cystic carcinoma
C. Warthin's tumor
D. Ductal papilloma

# Which of the following is of salivary gland origin ?
A. Acinic cell carcinoma
B. Granular cell myoblastoma
C. Chondrosarcoma
D. All of the above

# Reduction in flow of saliva is not generally seen in :
A. Elderly diabetics
B. Patient undergoing radiation therapy
C. Patients suffering from parkinsonism
D. Patients on phenothiazine drugs

# Sialography is used to detect anomaly of:
A. Salivary duct only
B. Salivary gland
C. Salivary gland and duct
D. Salivary gland tumors

# Acute non suppurative sialadenitis is seen in:
A. Acute bacterial sialadenitis
B. Mumps
C. Chronic bacterial sialadenitis
D. Necrotizing sialometaplasia

# A cyst occurs under the tongue, caused by obstruction of a salivary gland. Such a cyst is called :
A. Mucocele
B. Ranula
C. Dermoid cyst
D. Dentigerous cyst

# Mucocele most commonly arise as a result of :
A. Rupture of a salivary gland
B. Partial or complete compression of the salivary acini
C. Inflammatory changes in the glandular interstitial tissue
D. Partial or complete obstruction of the salivary duct by calculus

VIEW PART 2 >>


REVISE THESE MCQs in THIS VIDEO  

MCQs on Dental Materials : Amalgams Part 3

# A true eutectic alloy has melting point:
A. Above that of the low fusing metal
B. above the melting point of either metal
C. Below that of the high fusing metal
D. Below the melting point of either metal

# Creep value of which of the following is the highest ?
A. Low copper amalgam alloy
B. Admix alloy
C. Single composition alloys
D. Creep value of all the above mentioned alloys is same

# Advantages of minimum mercury technique or Eames technique is all except:
A. High strength
B. Sets quickly
C. Needs no squeezing of excess mercury
D. Greater plasticity and adapts well to cavity walls

# Amalgam achieves 70% of the strength by:
A. 2 hours
B. 4 hours
C. 8 hours
D. 16 hours

# The solid solution of silver and mercury is called:
A. gamma 1
B. gamma 2
C. beta 1
D. gamma

# Mercury is toxic because it:
A. complexes hemoglobin to form methemoglobin
B. inhibits hemoglobin synthesis, producing anemia
C. inhibits aerobic glycolysis
D. binds to sulfhydryl groups

# Once triturated, the dentqal amalgam should be condensed within:
A. 5 minutes
B. 6 minutes
C. 3 minutes
D. 15 minutes

# What fraction of inhaled mercury vapors is retained in the body?
A. 45-55%
B. 55-65%
C. 65-85%
D. More than 85%

# High strength amalgam is achieved by:
A. Maximum matrix amd minimum alloy phase
B. Minimum matrix and maximum alloy phase
C. Maximum matrix phase
D. Minimum alloy phase

# The effect of trituration on strength in an amalgam restoration depends on:
A. Amalgam alloy
B. Trituration time
C. Speed of amalgamator
D. All of the above




# Which of the following does not occur in high copper amalgam ?
A. Electrochemical corrosion
B. Chemical corrosion
C. Penetrating corrosion
D. Corrosion does not occur at all

# Decrease in creep occurs in:
A. Under trituration or over trituration of amalgam
B. Decrease with condensation pressure
C. Increase with condensation pressure
D. Cannot be predictable

# For dental amalgam, the elastic modulus and tensile strength is:
A. 40 Gpa and 60-100 Mpa
B. 21 Gpa and 27-55 Mpa
C. 350 Gpa and 10-120 Mpa
D. 360 Gpa and 125-130 Mpa

# Cavo surface angle for amlagam restoration is butt joint as:
A. it increases compressive and tensile strengths
B. it decreases compressive and increases tensile strength
C. it decreases both compressive and tensile strength
D. it increases compressive and decreases tensile strength

# Adequete mixing of mercury is indicated by :
A. Dry mix
B. Shiny mix
C. Short mixing time
D. None

# Which of the following are characteristic feature of high copper amalgam alloy?
A. Low compressive strength
B. High marginal breakdown
C. Less marginal breakdown
D. High creep

# Which is true regarding lathe cut silver alloy?
A. Requires least amount of mercury
B. Achieves lowest compressive strength at 1 hour
C. Has tensile strength both at 15 min and 7 days comparable to high copper unicompositional alloy
D. has low creep

# Coefficient of thermal expansion of amalgam is :
A. 6.6 ppm/K
B. 11.4 ppm/K
C. 14.0 ppm/K
D. 25.0 ppm/K

# Gallium and Indium added to amalgam replace:
A. Silver
B. Tin
C. Mercury
D. Zinc

# A patient who has had a recent amalgam filling in the upper teeth has a gold filling in the lower teeth, the patient complains of pain. The reason for this can be mainly:
A. Improper amalgam filling
B. Pulp exposure
C. Galvanism
D. None of the above

# Which one of the following is not an objective of trituration?
A. Remove oxides from powder particle surface
B. Keep the amount of gamma 1 or gamma 2 matrix crystals to maximum
C. Pulverize pellets into particles to aid in attack by mercury
D. Achieve a workable mass of amalgam in minimum time

# Outstanding clinical performance of dental amalgam restoration is related to its:
A. Compressive strength
B. Tensile strength
C. Corrosion resistance
D. High Creep

# Eames technique is ptherwise known as:
A. No squeeze cloth technique
B. Increasing dryness technique
C. Bloting mix
D. Mortar and pestle mix

# Discoloration of Ag containing alloy is due to : (Two answers correct)
A. Wet corrosion
B. Dry corrosion
C. Tarnish
D. Both Tarnish and corrosion

<< VIEW PART 2        PRACTICE MORE MCQS >>

MCQs on Dental Materials : Amalgams Part 2

# Advantage of zinc containing amalgam is :
A. Better handling property
B. Dimensional stability
C. Resistance to creep
D. Toxicity to pulp and dentin

# Cause of expansion in zinc containing amalgam is :
A. Zinc and water
B. Water
C. Hydrogen
D. Nascent oxygen

# What is the working time of amalgam ?
A. One to two minutes
B. Three to four minutes
C. Five to six minutes
D. Seven to eight minutes

# Which of the following amalgam alloys is least susceptible to creep ?
A. Lathe cut
B. Spherical
C. Microfine
D. Dispersion with high copper

# The percentage of copper in high copper alloy is :
A. 10-12%
B. 0-6%
C. 13-30%
D. 20-30%

# How soon after a moisture contamination does a zinc containing amalgam alloy start expanding ?
A. 24 hrs
B. 1-2 days
C. 3-5 days
D. 7 days

# What is common in amalgam and ceramics?
A. More compressive strength but less tensile strength
B. More compressive strength and tensile strength
C. Less compressive strength but more tensile strength
D. Less compressive strength and tensile strength

# What is the most frequeently used restorative material?
A. Silicate
B. Amalgam
C. Composite
D. Gold

# Which of the following constituents of amalgam alloy decreases expansion?
A. Copper
B. Zinc
C. Silver
D. Tin

# Which of the following silver amalgam alloys have the maximum strength ?
A. Lathe cut
B. Spherical
C. Admixed
D. Single composition

# The higher the Hg alloy ratio in dental amalgam:
A. Higher the strength
B. Lower the creep value
C. More matrix material formed
D. More gamma 1 phase formed





# Copper content in low copper amalgams is :
A. 6%
B. 12-30%
C. 29%
D. 19%

# Ag-Cu eutectic alloy has a characteristic property of that fusion temperature of :
A. the resultant alloy is greater
B. the resultant alloy is lesser
C. the resultant alloy varies according to the content of Ag and Cu
D. None

# Which phase provides maximum strength in hardened mercury/silver alloy ?
A. Silver/Mercury phase
B. Silver/Tin phase
C. Tin/Mercury phase
D. Zinc/Mercury phase

# Absorption of mercury in the human body occurs least from:
A. Lungs
B. Gastrointestinal tract
C. Skin
D. Kidneys

# The tarnished layer of silver amalgam consists of :
A. Sulphides of silver
B. Oxides of tin
C. Chlorides of tin
D. All of the above

# Which is not true about high copper amalgam alloys ?
A. Low tensile and compressive strength
B. Low Hg:alloy ratio
C. High tensile strength
D. Low creep

# The threshold limit value of mercury exposures is :
A. 0.01 mg/m3
B. 0.05 mg/m3
C. 0.1 mg/m3
D. 0.001 mg/m3

# "Amalgam" means :
A. A metallic powder composed of silver, tin, copper and zinc
B. An alloy of two or more metals, one of which is mercury
C. An alloy of two or more metals that have been dissolved in each other in the molten state
D. A metallic substance in powder or tablet form that is mixed with mercury

# Mercury intoxication in dental office mainly results from :
A. Direct contact with mercury
B. Inhalation of mercury vapours
C. Ingestion of mercury
D. None of the above

# In amalgam alloy, which of following acts as oxygen scavenger?
A. Cu
B. Zn
C. Pd
D. Ag

# Over-trituration of silver alloy and mercury:
A. reduces contraction
B. increases the strength of lathe-cut alloy but reduces the strength of spherical alloy amalgam
C. decreases creep
D. gives a dull and crumbly amalgam

# By increasing the percentage of which metal, the strength and hardness of amalgam increases?
A. Ag
B. Zn
C. Cu
D. Hg

# Mercury rich condition in a slow setting amalgam alloy system inn a restoration results in :
A. Accelerated corrosion
B. Fracture of the restoration
C. Marginal damage
D. All of the above

# Which of the following statements is true regarding lathe cut copper silver alloy ?
A. requires least amount of mercury
B. achieves high compressive strength at 1 hr.
C. has tensile strength, both at 15 minutes and 7 days is comparable to high copper, unicompositional alloys
D. has lower creep value

<< VIEW PART 1        VIEW PART 3 >>

MCQs on Dental Materials : Amalgams Part 1

The term "trituration" means:

A. Lysing amalgam alloy
B. Mixing of amalgam alloy and mercury
C. Removal of excess of mercury
D. None of the above

Dynamic creep is the:

A. Continuing alloying between Silver-Tin alloy and mercury during the life of the restoration
B. Deformation of set amalgam during function
C. Process whereby alloy is wetted by mercury
D. Spread of amalgam during packing

The highest mercury concentration in amalgam filling is found:

A. At the margin of restoration
B. In the centre of the restoration
C. In the deepest part of the restoration
D. None of the above

The dental amalgam is most resistant to:

A. Compressive stress
B. Impact stress
C. Shear stress
D. Tensile stress

The ADA specification no. 1 for composition of amalgam alloy recommends:

A. 65% silver, 32% tin and 3% copper
B. 49% silver, 32% tin and 19% copper
C. 65% silver, 29% tin and 5-6% copper
D. None of the above

According to ADA sp. no. 1, the minimum compressive strength for silver amalgam after one hour should be:

A. 80 Mpa
B. 140 Mpa
C. 260 Mpa
D. 510 Mpa

Which of the following phases of dental amalgam has minimum strength?

A. Gamma 1
B. Gamma 2
C. Gamma 3
D. Epsilon 1

Admixed high copper alloy powder contains:

A. 9-20% copper
B. 13-20% copper
C. 9-30% copper
D. 13-30% copper

Compared to conventional amalgams, spherical amalgams:

A. Require more mercury
B. Require heavy compaction forces
C. Have longer setting time
D. None of the above

Finishing and polishing of amalgam causes ___________ of the restoration.

A. Increase in tarnish and corrosion resistance
B. Increase in the marginal strength
C. Decrease the tarnish and corrosion resistance
D. Increase in the compressive strength

Which of the following statements about high copper silver alloy compared to conventional alloy is not true?

A. It has increased tensile and compressive strength
B. It has poor tarnish and corrosion resistance
C. Its edge strength is greater
D. Mercury content in the final restoration is less

Setting time of amalgam is best controlled by:

A. Using spherical particles
B. Lathe cut alloy
C. Altering Hg-alloy ratio
D. Trituration time

Increase in the residual mercury in silver amalgam filling can:

A. Cause fracture of the filling
B. Cause tarnish and corrosion
C. Increase in strength
D. Decrease condensation pressure

High Cu alloys have all of the following except:

A. High tensile strength
B. Low creep
C. High corrosion
D. None of the above

Chronic mercury toxicity results from:

A. Ingestion while removing old amalgam
B. Skin contact
C. Mercury vapor
D. All of the above

In non zinc containing dental amalgam alloy, the percentage of zinc present is:

A. Less than 0.02 %
B. Less than 0.1 %
C. Less than 0.01 %
D. None of the above

In spherical alloys as compared to lathe cut:

A. Less condensing force is required
B. More condensing force is required
C. Both require same condensing force
D. Manipulation is easy

High copper dental amalgams are superior to other amalgams because high copper dental amalgams:

A. have less marginal breakdown
B. are workable at lower Hg-alloy ratio
C. have a higher ratio of tensile to compressive strength
D. have less resistance to tarnish and corrosion

Well premeasured capsules of amalgam can release mercury vapor during:

A. Mulling
B. Carving
C. Condensation
D. Trituration

The largest component of amalgam alloy is:

A. Silver
B. Tin
C. Zinc
D. Copper

In a high copper amalgam, the phase which is eliminated is:

A. Gamma 1
B. Gamma 2
C. Gamma 1 and Gamma 2
D. No phase is eliminated

During amalgamation, trituration is done to:

A. dissolve the alloy in mercury
B. coat the alloy particles with mercury
C. remove excess mercury from amalgam
D. dissolve Hg in alloy

Moisture contamination of amalgam can lead to:

A. Marginal breakdown
B. Shrinkage
C. Delayed expansion
D. Increased stresses

Amalgam restorations give the best clinical service when the residual mercury content is:

A. 38-42%
B. 48-52%
C. 58-62%
D. 68-72%

Discoloration of silver alloy is due to:

A. Tarnish
B. Tarnish and corrosion
C. Wet corrosion
D. Dry corrosion

Percentage of tin in low copper alloy is:

A. 30-35%
B. 26-28%
C. 13-32%
D. 22-30%

VIEW PART 2>>>