MDS PREP
Which of the following muscles has two separate functions in mandibular
movement
1) Masseter
2) Geniohyoid
3) External(lateral)pterygoid
4) Buccinator
Anatomy Answer: 3
The external (lateral) pterygoid muscle has two primary functions: it assists in depressing the mandible (opening the mouth) and in moving the mandible forward (protrusion). This dual function distinguishes it from other muscles of mastication, which primarily elevate the mandible.
The primary canine is usually exfoliated between the ages of
1. 5 and 6 years
2. 10 and 11 years
3. l3 and l4years
4. 8 and 9years
Dental Anatomy
Answer: 2
The primary canine is usually exfoliated between the ages of 10 and 11 years
The largest and longest root canal of the maxillary second molar is the
1. lingual
2. mesiobuccal
3. distobuccal
4. distal
Dental Anatomy
Answer: 1
The largest and longest root canal of the maxillary second molar is the lingual
The muscle assisting in mastication but not supplied by mandibular nerve is
1.masseter 2.buccinator
3.mylohyoid 4.tensor veli palatine
Anatomy
Answer: 4
The muscle assisting in mastication but not supplied by mandibular nerve is tensor veli palatine
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.
The medial pterygoid muscle is attached to the
1. lateral surface of lateral pterygoid plate
2. lateral surface of greater wing of sphenoid
3. medial surface of lateral pterygoid plate
4. medial surface of medial pterygoid plate
Anatomy
Answer: 3
The medial pterygoid muscle is attached to the medial surface of lateral pterygoid plate
During eruption of permanent teeth, alveolar bone is
1. deposited only
2. resorbed only
3. resorbed and deposited intermittently
4. neither resorbed nor deposited
Dental Anatomy Answer: 3
During eruption of permanent teeth, alveolar bone is resorbed and deposited intermittently