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.
When extracting a primary maxillary incisor in which the root has been partially resorbed because of pres sure from its developing succe daneous tooth, which aspect of the remaining primary root will usually be longest and attached most securely to the gingiva?
1. Facial
2. Mesial
3. Lingual
4. Distal
Dental Anatomy
Answer: 1
In the case of primary teeth, the roots are often resorbed as the permanent teeth develop. The facial aspect of the root tends to be the last area to undergo resorption due to its position and the way the succedaneous tooth exerts pressure. The facial root surface is generally more stable and remains attached to the gingiva longer than the other aspects, making it the longest and most securely attached during extraction.
The cricothyroid artery is a branch of the
1. occipital artery
2. superior thyroid artery
3. facial artery
4. superficial temporal artery
Anatomy
Answer: 2
The cricothyroid artery is a branch of the superior thyroid artery
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
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 fibres of Purkinje?
1. Are remains of embryonic cardiac muscle fibres
2. Are placed over the pericardium
3. Arise from the sinu-arterial noded a and b both
4. a and b both
Anatomy Answer: 1
These form specialized fibres of the heart and are supposed to be terminal filaments of bundle of His. They are placed beneath the endocardium and intervene between it and the myocardium.
The artery chiefly responsible for blood supply to the mandible is 1. inferior alveolar artery 2.sphenomandibular artery 3. mylohyoid artery 4.stylomandibular artery
Anatomy Answer: 1The artery chiefly responsible for blood supply to the mandible is inferior alveolar artery
The tendon of anterior belly digastric passes between the tendon ends of:
1. Styloglossus muscle
2. Stylohyoid muscle
3. Hyoglossus muscle
4. Posterior belly of digastric
Anatomy
Answer: 2
The tendon of anterior belly digastric passes between the tendon ends of Stylohyoid muscle