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NEET MDS Quiz - Practice Test
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Practice Test

Conservative Dentistry - 3 Questions

1
Conservative Dentistry
An old composite restoration is to be replaced. The best method is
1) To remove entire restoration, re-etch and refill
2) To roughen the old restoration, re-etch and refill
3) Composite restoration cannot be replaced or refilled
4) None of the above

πŸ“ Explanation:

Roughening the old restoration and re-etching it allows for better bonding of the new composite material.

2
Conservative Dentistry
The main disadvantages of composites of not being recommended for class II posterior restorations 
 1. Colour matching is not good
 2. Lacks sufficient strength
 3. Occlusal wear
 4. Frequent fractures at the isthmus

πŸ“ Explanation:

One of the main disadvantages of composite materials in Class II posterior restorations is their susceptibility to occlusal wear, which can compromise the longevity of the restoration.

3
Conservative Dentistry
How much fraction of methyl mercuryis absorbed from gut
1)20%
2)50%
3)80%
4)100%

πŸ“ Explanation:

100% of methyl mercury is absorbed from the gut. After absorption methyl mercury binds to hemoglobin, circulates systemically and is distributed to all organs, including the brain

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