NEET MDS Quiz - Practice Test

1

Dental Anatomy

Malformation of the coronal portion of the permanent anterior teeth is most frequently encountered in the
1. maxillary central incisor
2. maxillary lateral incisor
3. maxillary canine
4. mandibular lateral incisor

Option 1

Option 2

Option 3

Option 4

📝 Explanation:

Maxillary lateral incisor agenesis:
This is the most common congenital absence of a permanent tooth in the maxillary anterior region, accounting for about 20% of all dental anomalies.

Coronal developmental invagination (DI):This is a common anomaly in the permanent maxillary lateral incisor, usually appearing as an accentuation of the lingual pit.It's often bilateral.

Peg-shaped crown:This is a common alteration in the maxillary lateral incisor.

2

Dental Anatomy

When calcospherites fail to fuse during calcification of dentin matrix then
1 Interglobular dentin is formed
2 Dead tracts are found in formed dentin
3 Irregular dentin results
4 None

Option 1

Option 2

Option 3

Option 4

📝 Explanation:

Interglobular Dentin:
Sometimes, mineralization of dentin begins in small globular areas that fail to coalesce into a homogenous mass. This results in�zones of hypomineralization between the globules.
These zones are known as globular dentin or interglobular spaces. Thus, demonstrating defect of mineralization and not of matrix�formation, the dentinal tubules pass uninterruptedly through interglobular dentin.

3

Dental Anatomy

The average overall length of the permanent maxillary central incisor is 1. 14.5mm 2. 18.0 mm 3. 22.5 mm 4. 30 mm

Option 1

Option 2

Option 3

Option 4

📝 Explanation:

The average overall length of the permanent maxillary central incisor is 22.5 mm

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