Dental Surveyor

# Dental surveyor is used to:
a) Measure resiliency of tissues
b) Indicate relative parallelism between two teeth
c) To determine primary stress bearing area
d) To determine the depth of undercut

The correct answer is D. To determine the depth of undercut.

 - Surveyor is used to determine the relative parallelism of two or more surfaces of teeth or other parts of dental cast. It is used to:
• Survey the diagnostic and master cast
• Contour wax patterns and crowns
• Measure specific depth of undercut
• Blocking out the master cast
• Place internal rests etc.

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Advantage of resin teeth over porcelain teeth

# The advantage of resin teeth over porcelain teeth is:
a) Greater wear resistance
b) Increased hardness
c) Better dimensional stability
d) Greater impact resistance

The correct answer is D. Greater Impact resistance.

Resin teeth display greater impact resistance and ductility and are less likely to chip or fracture when compared to porcelain.

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Occlusal Plane for Complete Denture

# The occlusal plane for the complete denture patient is determined by:
a) The face bow device which determines the occlusal plane
b) The position of the upper first molar
c) The height of the retromolar pad and anterior esthetic height
d) The curve of Spee and the anterior esthetics

The correct answer is: c) The height of the retromolar pad and anterior esthetic height.

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Palatal Hyperplasia due to Denture Irritation

# Treatment of choice for palatal hyperplasia occurring due to denture irritation is:
a) Discontinuation of dentures
b) Radicular excision
c) Supraperiosteal excision
d) No treatment necessary

The correct answer is C. Supraperiosteal excision.

Early treatment for papillary hyperplasia includes prosthesis adjustment, tissue conditioning and proper oral hygiene. Advanced treatment consists of supraperiosteal excision. There is no need to excise full thickness of palatal tissue. The techniques include removal of inflamed mucosa with electrosurgery loops, laser ablation, sharp dissection, dermabrasion brushes, and cryotherapy.

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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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