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NEET MDS Quiz - Practice Test

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endodontics - 3 Questions

1
Endodontics
A root canal treated maxillary lateral incisor is fractured at the cervical level of the crown. The coronal end of silver cone which was used for root canal filling is visible. Select the line of treatment to achieve the required post space 
 1. Remove the silver cone and retreat the canal using a gutta-percha and then create space for the post
 2. Create post space alongside the silver cone using burs and peeso reamers
 3. Ginding away of the coronal part of the silver cone
 4. None of the above

📝 Explanation:

Silver cones should be completely removed and the canal retreated with gutta-percha before creating post space. Silver cones can corrode, leak, and do not seal as effectively as modern gutta-percha techniques.

2
Endodontics

An endodontist failed to obturate an accessory canal while obturating main canal. Immediate treatment 
1. No treatment, observe periodically
2. Surgical expose and retrofill
3. Retrieve and reobturate
4. Apicetomy and retrofill

📝 Explanation:

If the main canal is well obturated and the tooth becomes asymptomatic, unfilled accessory canals often heal spontaneously. Immediate surgical intervention is not indicated unless symptoms persist or develop.

3
Endodontics
Mesial root of mandibular molar having root canals with two separate foramina is said to be 
 1. Type I canals
 2. Type II canals
 3. Type III canals
 4. Type IV canals

📝 Explanation:

According to Vertucci classification, Type III canals have two separate canals that join and exit as one foramen. However, the question describes two separate foramina, which would be Type IV. The answer key shows Type III, but this may need verification.

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