Denture Cleaning Powder

# Which of the following is the main ingredient of denture cleaning powder or tablets?
a) Hydrogen peroxides
b) Detergents
c) Sodium perborates
d) Alkaline compounds

The correct answer is C. Sodium Perborates.

All the denture cleansing powder and tablets contain detergent, flavouring agent, alkaline compounds and sodium perborate. The main component is sodium perborate. It decomposes in water to form a peroxide solution which inturn breaks down to liberate oxygen. It is this oxygen bubbles that remove the debris on the denture surfaces.

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Iron carbide in Orthodontic Wire

# The iron carbide in orthodontic wire is in the form of:
a) Martensite
b) Ferrite
c) Carbide
d) Austenite

The correct answer is D. Austenite.

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Infantile Swallowing

# The positioning of tongue in infantile swallowing is:
a) Posterior
b) Medial
c) Lateral
d) Anterior

The correct answer is D. Anterior.

Tongue thrusting, simply defined, is the habit of thrusting the tongue forward (anterior) against the teeth or in between while swallowing. It is an infantile pattern of swallowing that has been retained by an individual.

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Quick Review of Dental Anatomy and occlusion MCQs

# The only symbolic tooth numbering system is:
A. FDI System
B. Palmer system
C. Universal system
D. ADA system

# Resorption in primary central incisors begin at:
A. 2 years
B. 3 years
C. 4 years
D. 5 years

Posterior Bite Plane Indications:

# Posterior bite plane is used in correcting :
a) Deep bite
b) Anterior open bite
c) Anterior cross bite
d) Posterior cross bite

The correct answer is C. Anterior Cross Bite

Anterior Bite Plane:

• Used for correction of deep bite

• It should provide a clearance of 2-3 mm between upper and lower posterior teeth to provide space for supra eruption.

Posterior Bite Plane: 

• Along with Z spring used in treatment of anterior cross bite

Upper anterior inclined Plane

• Provides reinforced or multiple anchorage and is constructed at an angle of 60° to occlusal plane

• The mandible is used to reinforce the anchorage by the engagement of lower incisors on to upper inclined bite plane. Thus a distal force is applied on the maxillary teeth

SVED Appliance

• It is a modification of upper anterior inclined plane with an additional upper incisal  capping. It has advantage of splinting the incisors to prevent them being forced labially.

Catlans appliance or lower anterior inclined plane

• The inclined plane is designed to have a 45 degree angulation and is used to treat maxillary anterior teeth in crossbite.

• It can be made of acrylic or cast metal and is designed to treat a single tooth in cross bite or a segment of upper arch in crossbite.

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Anterior Bite Plane Indications

# Anterior bite plane is used in correction of:
a) Anterior cross bite
b) Deep bite
c) Open bite
d) All of the above

The correct answer is B. Deep Bite.

Anterior Bite Plane:

• Used for correction of deep bite

• It should provide a clearance of 2-3 mm between upper and lower posterior teeth to provide space for supra eruption.

Posterior Bite Plane: 

• Along with Z spring used in treatment of anterior cross bite

Upper anterior inclined Plane

• Provides reinforced or multiple anchorage and is constructed at an angle of 60° to occlusal plane

• The mandible is used to reinforce the anchorage by the engagement of lower incisors on to upper inclined bite plane. Thus a distal force is applied on the maxillary teeth

SVED Appliance

• It is a modification of upper anterior inclined plane with an additional upper incisal  capping. It has advantage of splinting the incisors to prevent them being forced labially.

Catlans appliance or lower anterior inclined plane

• The inclined plane is designed to have a 45 degree angulation and is used to treat maxillary anterior teeth in crossbite.

• It can be made of acrylic or cast metal and is designed to treat a single tooth in cross bite or a segment of upper arch in crossbite.

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MCQs on Pathology of Cell Proliferation and Neoplasia - General Pathology MCQs

# The reversible change including the replacement of one type of adult cells with the other type is called:
A. Hyperplasia
B. Metaplasia
C. Dysplasia
D. Neoplasia

# The disordered reversible cellular changes such as pleomorphism, nuclear hyperchromatin are seen in:
A. Hyperplasia
B. Metaplasia
C. Dysplasia
D. Neoplasia