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Oral Surgery NEET MDS Practice Test
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Oral Surgery - 3 Questions

1
Oral Surgery
"Line of withdrawal" of a tooth is mainly determined by
1) The size of the crown
2) The root pattern
3) Shape of the crown
4) Size of the roots

📝 Explanation:

The line of withdrawal is mainly determined by the root pattern. This refers to the path along which a tooth should be removed to avoid interference from surrounding bone and adjacent teeth. Root morphology, including number, size, and curvature, dictates this extraction path.

2
Oral Surgery
The mechanical advantage obtained from the wheel and axle principle of elevator is 
 1. 2.5
 2. 3
 3. 4.6
 4. 6

📝 Explanation:

The mechanical advantage obtained from the wheel and axle principle of elevator is 3.

3
Oral Surgery
When the mandible is fractured in the canine region, both on the right and left sides, the fractured segment is displaced posteriorly by the pull of the
1. masseter, medial pterygoid and mylohycid muscles
2. buccinator, mylohyoid and genioglossus muscles
3. geniohyoid, thyroglossus and mentalis muscles
4. geniohyoid, genioglossus and anterior belly of digastric muscles

📝 Explanation:

When the mandible is fractured bilaterally in the canine region, the central fractured segment loses the anterior pull from the muscles attached to it. The geniohyoid, genioglossus, and anterior belly of the digastric muscles are all attached to this segment and pull it posteriorly and inferiorly.

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