511. When the dentist enters the operatory, the patient, who is new to the office, stands close to the wall, has his arms folded, and is looking at the floor. The dentist should initiate communication by saying which of the following?

A. Let's get going, I've got a lot to do.
B. What are you angry about?
C. Didn't my assistant get you seated?
D. You seem uncomfortable; did you have a bad dental experience?
E. Hi, I'm Doctor Wilson, what brings you here today?

81.In restoring a mandibular first molar, lingual cusps are important for which movement?

A. Centric occlusion B. Protrusive
C. Retrusive D. Working E. Nonworking

ANS. D. To answer this question, place your own teeth in centric occlusion(maximum intercuspation). Notice that the occlusion is held in place by the lingual cusps of maxillary teeth and the buccal cusps of mandibular teeth. Mandibular lingual cusps are not in contact. In protrusion, the anterior teeth act to separate the maxilla and mandible as the mandible moves forward. The anterior teeth act as guides in retrusion as well (try it). So far the mandibular lingual cusps are not involved. If you make a left working movement (slide your mandible left), notice that the mandibular lingual cusps on the left, drag against the lingual side of the maxillary lingual cusps. In the nonworking side (in this case, the right side), the mandibular lingual cusps move AWAY from contact.


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75.Which cusp of the maxillary molar is NOT part of the trigon (primitive cusp triangle)?

A. Mesiolingual    B. Mesiobuccal

C. Distolingual     D. Distobuccal

ANS> C. In evolution, three cusps of the maxillary molar are considered to be the 

primary cusp triangle, and the original three cusps of the evolving molar. They form the trigon, and are 

the MB, ML, and DB cusps. The fourth cusp, the DL, is the smallest, is considered to be a minor cusp, 

and is known evolutionarily as the talon, or talon cusp. This cusp is less conspicuous as you go from 

first to second to third maxillary molar. 

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41.Recommended size of sprue for wax pattern crowns is:

a. Guaze 8 to 10. b. 10 to 12
c. 10 to 14. d. 12 to 16.

Ans:c ref Skinner’s 10th -496


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39.The most common site for CSF rhinorrhea

a. frontal bone b. ethmoid bone
c. tegmen tympani d. none

ANS. b ethmoid bone

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37.The minimum percentage of binder that should be present in the gypsum bonded investment is:

1. 10%. 2. 25%.
3. 50%. 4. 75%.


ANS.2 REF Skinner’s 10th -472

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36.The first dental college in India was started in Calcutta by Dr. Rafiuddin Ahmed in:

1. 1930 2. 1925
3. 1920 4. 1915

ANS.3 ref Soben Peter-12


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35.The ability of a test to identify correctly all those who have the disease, that is minimum false negative result is:

1. Predictivity 2. Negativity
3. Sensitivity 4. Specificity

ANS.2 ref Park-408

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34.Which of the following point is located at geographic center of ramus?

1. Ptm point. 2. Key point.
3. Xi point. 4. Gonion.

ANS. 3.ref pg 98 Gurkeerat Singh – 1st Ed.


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30.Which of the following is also known as scissors bite?

1. Simple posterior cross bite. 2. Buccal non occlusion.
3. Lingual non occlusion. 4. None of the above.

ANS. 2


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28.Which of the following methods of study of physical growth are not longitudinal?

1. Craniometry. 2. Anthropometry.
3. Cephalometric radiography.
4. Both 1 and 2.

ANS. 1.
ref pg 8 Gurkeerat Singh – 1st Ed.


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27. Dental floss is used for cleanning which type of embrasures:

a) Type 1       b)2       c)3      d) all

ANS. A

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26. The most common cause of failure of the IDN “Inferior Dental Nerve” block is

A. Injecting too low
B. Injecting too high
ANS. A

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22.Deep part of submandibular salivary gland is in relation to

a.Facial nerve

b.Lingual nerve

c.Accessory nerve

d.Mandibular nerve

Ans.(b): Refg. 133/3rd Chaurasia’s Edition.

It is supplied by branches from the sumandibular ganglion. These branches convey a) secretomotor fibres; (b)sensory fibres from the lingual nerve; and (c) vasomotor sympathetic fibres from the plexus on the facial artery.

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20. How many teeth (out of 32) in the normal dentition oppose only ONE other tooth?

A. None B. 1

C. 2 D. 4

ANS.D.

Because of the shift of the mandibular teeth in a mesial direction due to the smaller size of the anterior teeth, most teeth have two opposing teeth. That is, they oppose their counterpart in the other arch, and a tooth either mesial or distal to that counterpart. There are two classes of exceptions. One of the exceptions is the mandibular central incisors. These two teeth (#24 and #25) oppose only the maxilary centrals (#8 and #9). The other exception is the maxillary third molars (#1 and #16), which oppose only the mandibular third molars.

Note that the mandibular third molars oppose both the maxillary second and third molars.

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