MDS PREP
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
Primary teeth begin to calcify between the ________ and ________months in
utero.
1) first; second
2) second; fourth
3) fourth; sixth
4) sixth; eighth
The primary teeth begin to form in utero at about six weeks. Hard tissue
formation occurs in all primary teeth by the 18th week in utero. 3. The
permanent teeth begin to develop at approximately four months of age in utero.
Maxillary and mandibular first molars begin to calcify at birth.
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
Tongue is protruded by which of the following muscle
1. Hyoglossus
2. Palatoglossus
3. Myelohyoid
4. Genioglossus
Anatomy
Answer: 4
Tongue is protruded by Genioglossus
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 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 smallest and most inaccessible root canal-in the maxillary second molar is the
1. faciolingual
2. mesiobuccal
3. lingual
4. distobuccal
Dental Anatomy
Answer: 4
The smallest and most inaccessible root canal-in the maxillary second molar is the distobuccal
How soon after the eruption of permanent tooth is the apex usually fully developed?
1. Immediately
2. 3-6 months
3. 2-3 years
4. 6-9 years
Dental Anatomy
Answer: 3
Afet tooth eruption in permanent teeth the apex is fully developed after 2-3 years