MDS PREP
The first teeth to erupt in the dental arches of the human being are the, primary
1. mandibular cuspids
2. maxillary central incisors.
3. mandibular central incisors
4. maxillary first molars
Dental Anatomy
Answer: 3
The first teeth to erupt in the dental arches of the human being are the, primary mandibular central incisors
The nerve to masseter passes
1. deep to the medial pterygoid muscle
2. posterior to temporomandibular joint
3. superior to zygomatic arch to enter the muscle on its medial surface
4. through the mandibular notch to enter the muscle on its medial surface
Anatomy
Answer: 2
The nerve to masseter passes posterior to temporomandibular joint
The most constant and valuable trait to differentiate among maxillary first second and third molars is the
1. comparative size of the cusp of Carabelli
2. height of cusps
3. depth of central fossae
4. relative position of the distolingual groove
Dental Anatomy
Answer: 3
The most constant and valuable trait to differentiate among maxillary first second and third molars is the depth of central fossae
Immediately following the closure of the A-V valves is the period of
1. Isotonic contraction
2. Isometric contraction
3. Isometric relaxation
4. Isotonic relaxation
Anatomy
Answer: 3
Immediately following the closure of the A-V valves is the period of
Isometric relaxation
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
�
Dental Anatomy
Answer: 1
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.
How many root canals does a madibular first molar normally have
1. 2
2. 3
3. 4
4. 5
Dental Anatomy
Answer: 2
madibular first molar normally have 3 root canals
The canine eminence is
1. associated with the mandibular canine only
2. the labial ridge on the crown of canine
3. an osseous structure surrounding the root of a canine on the facial aspect
4. the prominent ridge on the lingual surface of a maxillary canine
Dental Anatomy Answer: 3
The canine eminence is
an osseous structure surrounding the root of a canine on the facial aspect
The trigeminal ganglion lies on
1 Anterior temporal bone near its apex hi Meckel�s cave, which is a depression in the bone
2. Posterior surface of petrous temporal bone near Its apex in -Meckel�s cave. which is a depression In the bone
3. Anterior surface of petrous temporal bone near its apex in Meckel�s cave which is a space of dura mater
4. Petrous temporal bone in posterior cranial fossa
Anatomy
Answer: 3
The trigeminal ganglion lies on Anterior surface of petrous temporal bone near its apex in Meckel�s cave which is a space of dura mater