Susceptibility to dental caries

# Which of the following individual show susceptibility to dental caries?
a) Hereditary fructose intolerance
b) Down syndrome
c) Pierre robin syndrome
d) Epidermolysis bullosa

The correct answer is D. Epidermolysis bullosa.

Junctional epidermolysis bullosa and recessive variant Epidermolysis bullosa dystrophic variant manifest severe disturbances in enamel and dentin formation. The recessive form may also manifest rudimentary teeth, congenitally absent teeth, hypo plastic teeth, crowns denuded of enamel.

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Unilateral TMJ ankylosis

# Unilateral TMJ ankylosis is associated with the following features except :
A. Multiple carious teeth
B. Facial asymmetry with fullness on the normal side of mandible
C. Chin deviated towards the affected side
D.Prominent antegonial notch on the affected side

The correct answer is A. Multiple carious teeth. 

All other features are seen in unilateral TMJ ankylosis. 

In unilateral TMJ Ankylosis, face is asymmetrical with fullness on the unaffected side of mandible and flattening on the affected side.

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Synovial fluid is considered an ultrafiltrate of:

# In relation to TMJ, synovial fluid is considered an ultrafiltrate of:
A. Serum
B. Platelets
C. Plasma
D. Lymph

The correct answer is C. Plasma. 

In relation to TMJ, synovial fluid is considered an ultrafiltrate of plasma. 

Total protein content is less compared to plasma but relatively there is higher albumin and less proportion of gamma globulin.

Usually, less than 2 ml of fluid is present in each healthy TMJ. 

It contains higher amounts of hyaluronic acid. It increases the viscosity of the fluid and helps in its function as a shock absorber. 

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Pontic recommended in mandibular anterior areas

# A pontic recommended in mandibular anterior areas with extensive ridge resorption:
A. Modified ridge lap
B. Modified ridge lap with no embrasures
C. Sanitary pontic
D. Bullet pontic

The correct answer is B. Modified ridge lap with no embrasures.

In the mandibular anterior region when there is minimal bone loss (and esthetics are involved), modified ridge lap is the preferable design; when there is extensive bone loss modified ridge lap with no embrasures is the preferable design. 

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