MDS PREP
Which of the following local anaesthetics is a vasoconstrictor
1) Lidocaine
2) Procaine
3) Bupivacaine
4) Ropivacaine
Oral Surgery
Answer: 4
According to Monson’s spheric theory of occlusion, each cusp and incisal edge
conforms to a segment of the sphere, 8 inches in diameter, with its center at
the
1. sella
2. lambda
3. glabella
4. bregma
Prosthodontics
Answer: 3
Explanation: Monson's spheric theory of occlusion suggests that all cusps and
incisal edges of the teeth should conform to a sphere with an 8-inch diameter,
with the center of the sphere at the glabella, which is the most anterior and
superior point on the midline of the frontal bone of the skull. This concept is
used to achieve balanced occlusion in complete dentures.
Which radiographs are taken first during full mouth survey of an adult
1) Periapical films of maxillary incisors
2) Periapical films of mandibular incisors
3) Periapical films of maxillary molars
4) Bite wing films
Radiology
Answer: 4
Useful range of density for a dental X-ray is
1) 0.3-2
2) 1.2-2.4
3) 2.4-4.2
4) 4-6
Radiology
Answer: 1
After a cast gold crown is mde, it failed to seat the die. You would like to
1) Scrape the surface of the die
2) Apply continuous pressure until the crowns seats completely
3) Grind the inner side over extensions of the crown
4) All of the above
Prosthodontics
Answer: 3
Proximal caries usually starts at or in
1) Contact area
2) Gingival to contact area
3) Above contact area below marginal ridge
4) Gingival to free gingival margin
Conservative Dentistry
Answer: 2
An odontogenic neoplasm that may be mistaken for an ameloblastoma but is of mixed tissue origin and considerably less aggressive is
1) A cementoblastoma
2) An odontogenic fibroma
3) A cementifying fibroma
4) An ameloblastic fibroma
Oral Pathology
Answer: 4
An ameloblastic fibroma is a benign odontogenic tumor that contains both epithelial and mesenchymal components, making it a mixed tissue neoplasm. While it can resemble an ameloblastoma histologically, it is generally less aggressive and has a better prognosis. Ameloblastic fibromas are often found in younger patients and can be treated effectively with surgical excision.