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NEET MDS Quiz - Practice Test
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dental anatomy - 3 Questions

1
Dental Anatomy

The secretory product of odontoblasts is:

1) Topocollagen.
2) Calcium salts.
3) Mantle dentin.
4) Hydroxyapatite

📝 Explanation:


Dentinogenesis is the formation of dentin by odontoblasts of mesenchymal origin located at the periphery of the dental pulp

Dentinogenesis is initiated by the inductive influence of the enamel organ involving molecular signaling pathways, such as Wnt, Runx-2, and TGF-?. In the molar tooth, dentinogenesis starts at the late bell stage, and occurs in the crown as well as root regions.

Predentin, the first organic matrix secreted by odontoblasts, is composed by proteoglycans, glycoproteins, and collagens.

2
Dental Anatomy
A tooth makes its appearance in the oral cavity usually when
1. all of the crown is completed
2. all of the root is completed
3. one half of the root is completed
4. one half of the crown is completed

📝 Explanation:

A tooth makes its appearance in the oral cavity usually when one half of the root is completed

3
Dental Anatomy
How many root canals does a madibular first molar normally have
1. 2
2. 3
3. 4
4. 5

📝 Explanation:

madibular first molar normally have 3 root canals

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