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NEET MDS Quiz - Practice Test
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endodontics - 3 Questions

1
Endodontics
Which of the following is most likely to cause complete obturation of pulp space
1) A deep restoration without base
2) A deep blow to tooth where tooth was injured and not devitalised
3) Normal calcification process in middle age
4) A deep carious lesion

📝 Explanation:

Traumatic injury to a tooth, such as a deep blow, can stimulate the formation of tertiary dentin or reparative dentin, which is a defensive response of the pulp to protect itself. This calcification process can lead to the gradual or even complete obliteration of the pulp chamber and canals, a condition known as pulp canal obliteration (PCO). The tooth remains vital but the pulp space is significantly reduced or fully closed

2
Endodontics
In case of bleaching technique to remove flurosis stains 
 1. 1 % ether removes the surface debris
 2. 36 % hydrochloric acid etches the enamel
 3. Both A and B are correct
 4. Both A and B are wrong

📝 Explanation:

In fluorosis stain removal using microabrasion technique, both statements are correct: 1% ether is used to remove surface debris and organic pellicle from the tooth surface, preparing it for the etching procedure. 36% hydrochloric acid etches the enamel surface, removing the superficial fluorotic stains by creating micro-porosities. This combination technique (enamel microabrasion) effectively removes localized fluorosis stains from the outer enamel layer.

3
Endodontics
A patient reports of dull pain in the jaws. Pain is more severe immediately after walking up from a night sleep. Patient also complains of difficulty in opening mouth. The probable cause may be
1) Pulpitis
2) Bruxism
3) Periodontitis
4) Migraine

📝 Explanation:

The symptoms described in the image are characteristic of bruxism, which is the involuntary grinding or clenching of teeth.

Dull pain in the jaws is a common symptom due to muscle strain.

Pain being more severe after waking up is typical, as the clenching/grinding often occurs during sleep.

Difficulty opening the mouth (trismus) results from the overworked and tense jaw muscles.

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