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NEET MDS Quiz - Practice Test
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dental anatomy - 3 Questions

1
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

2
Dental Anatomy

If a 4th root canal is present in a maxillary 1st molar, it will likely be located in which of the following roots?

1) Mesiolingual
2) Mesiobuccal
3) Distolingual
4) Distofacial

📝 Explanation:

Well over 50% of maxillary 1st molars have two canals in the mesiobuccal root. Some authors cite the number as high as 90%.

There are usually 3 roots and 4 canals in a maxillary 1st molar.
The fourth canal, the mesiolingual canal, is also referred to as: the accessory mesiobuccal canal, mesiocentric, mesiopalatal canal or MB2. 
It is usually tough to find MB2 through clinical inspection and it is not obvious on a radiograph. A dentist should expect it is present before beginning a root canal on the first maxillary molar.

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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