Dental MCQs For PG Preparation

Update for Dental MCQS and Notes

2010-06-15T22:55:00.001+05:30

Preparing for the post graduate entrance examinations in dental sciences in India is one of the toughest aspects for any BDS student. There are very few seats and the competition for the same is very fierce. Dental MCQs and Notes was started a few years back as part of my preparation for the entrance examinations during my internship. I have tried to solve various entrance exam questions and collect as many multiple choice questions in Dental Sciences as possible. I have also gathered some high yield notes with a view to get admission to a post graduation course. The MCQs and notes are arranged subject wise and labelled accordingly. I have tried to obtain detailed explanations for the multiple choice questions. Medical knowledge is constantly changing and hence it is advised that the student checks with standard text-books on the subjects in case of doubts or errors.

I also find that this blog is very popular in the Middle East and Pakistan. To people from these regions and all the other people wherever you might be, thank you for your support and I hope to receive more comments from you.

Mesothelioma: How much compensation?

2009-11-19T21:41:00.003+05:30

“Mesothelioma” is a degenerative lung disorder caused by Asbestos exposure. Asbestos-related diseases will kill six Australians every day over the next 20 years. The number of diagnosed cases of mesothelioma is expected to reach 18,000 by 2020, when the disease numbers are expected to peak. Mesothelioma law firm specializing can help bring the mesothelioma patients to trial. The payout from these settlements averages (USD) $1 million with a small sum attributable to the law firm. Mesothelioma Law works on the premise that this exposure to an asbestos related substance without prior knowledge has lead to the injury, or sometimes death of the Mesothelioma sufferer. If you have mesothelioma, there are ways to pay for your life-extending treatment. None of them provide absolute certainty or peace-of-mind. Some are like spinning a roulette wheel.

You might stump up your workers compensation pay-out – presuming you have one – but you won’t be covered unless you prove the disease was contracted in the course of employment. Some private health insurers will cover you - but that varies wildly from fund to fund – and who would have sought coverage for lung diseases 30 years ago when we were unaware of the dangers asbestos posed?

Embryology MCQ 02

2009-04-24T18:03:00.001+05:30

Which of the following statements concerning the tympanic cavity is correct?

A. It is of endodermal origin
B. It develops from pharyngeal pouch 3
C. The malleus and incus develop from pharyngeal arch 3
D. The stapes develops from pharyngeal arch 4

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120 MCQs in Prosthodontics

2009-03-17T14:55:00.001+05:30

For a distal extension removable partial denture, the jaw relations should be recorded ____________ the secondary impression is made and __________ the framework in place.

before; with
before; without
after; with
after; without
as; with

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119 MCQs in Prosthodontics

2009-03-17T14:53:00.001+05:30

Who developed the most widely accepted classification system for partially edentulous arches?

Skinner
Applegate
Kennedy
Barlyn
Toth

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118 MCQs in Prosthodontics

2009-03-17T14:50:00.001+05:30

If your laboratory technician is conscientious, dependable, and knowledgeable in all the details of good partial denture design and construction, you should make the prescription for the partial denture by

submitting a rough sketch of the design and relying on the technician’s ability and training to produce an acceptable denture
drawing all the details of the design on the master cast and submitting it with the expectations that it will be followed explicitly
labelling a colored pencil drawing on a chart, outlining it on the master, and providing the technician with written instructions
consulting with the technician throughout the designing phase to allow the technician to share in the responsibility for the design
simply send the final impression to the lab with a note to “Just Do It”

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117 MCQs in Prosthodontics

2009-03-17T14:47:00.001+05:30

The primary requirement of a major connector is that it be

flat
polished
flexible
a design from the book
rigid

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116 MCQs in Prosthodontics

2009-03-17T14:44:00.001+05:30

If the lingual alveolar bone in the premolar region of the mandible has anything but a steep vertical slope, any rigid metal covering the area during downward function must be

relieved during construction
thickened during the wax-up
relieved at delivery
relieved after delivery
slightly in contact

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115 MCQs in Prosthodontics

2009-03-17T14:42:00.002+05:30

The textbook authors and your lecturers recommend that, after mouth preparations, an impression be made in irreversible hydrocolloid and a cast poured in quick-setting stone. The purpose of this is to

determine the proper size of stock tray for reversible hydrocolloid
maximum resident benefit
make a cast available to the laboratory for final waxing and casting
evaluate the contours of the occlusal rests for adequate reduction
verify that proper contours have been provided on the potential abutment teeth

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114 MCQs in Prosthodontics

2009-03-17T14:39:00.002+05:30

The part of a removable partial denture that assists the direct retainers in preventing displacement of distal extension bases by functioning as part of the resistance arm of a lever anterior to the fulcrum line is termed a (an)

reciprocal clasp arm
indirect retainer
inadvertent retainer
guiding plane
rester

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113 MCQs in Prosthodontics

2009-03-17T14:36:00.001+05:30

Which of the following are elements of the clasp assembly?

1. Major connector

2. Retentive clasp arm

3. Minor connector

4. Stabilizing clasp arm

5. Rest

1, 2
1, 3, 5
2, 4, 5
2, 3, 4, 5
1, 2, 3, 4, 5

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112 MCQs in Prosthodontics

2009-03-17T14:33:00.002+05:30

Two or more parallel axial surfaces of abutment teeth shaped to direct the prosthesis during placement and removal are called

reciprocal clasp arms
indirect retainers
guiding planes
undercuts
retentive clasp guidance

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111 MCQs in Prosthodontics

2009-03-17T14:29:00.001+05:30

All of the following features describe the proximal plate/guiding plate area needed for proper functioning of the RPI clasp assembly, except

a guiding plane is prepared on the distal surface of the abutment tooth in the occlusal one-third
the guiding plane is approximately 2 3 mm in height occlusogingivally
an undercut should exist below the guiding plane to permit movement of the proximal plate
the proximal plate contacts approximately 1 mm of the occlusal portion of the guiding plane
the proximal plate contacts approximately 1 mm of the gingival portion of the guiding plane

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110 MCQs in Prosthodontics

2009-03-17T14:27:00.002+05:30

All of the following are sites of arbitrary blockout of the mandibular RPD master except

all gingival crevices
gross tissue undercuts situated below areas involved in design of denture framework
labial and buccal tooth and tissue undercuts not involved in denture design
tissue undercuts to be crossed by origin of bar clasps
all of the above are sites of arbitrary blockout

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109 MCQs in Prosthodontics

2009-03-17T14:25:00.001+05:30

According to the Kennedy Classification of partially edentulous arches, a single, but bilateral edentulous area crossing the midline, and located anterior to the remaining teeth would be a

Class I
Class II
Class III
Class IV
Class V

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108 MCQs in Prosthodontics

2009-03-17T11:12:00.001+05:30

All of the following statements are considerations when relining a bilateral distal extension RPD opposing a maxillary complete denture, except

loss of posterior occlusal contact between the complete denture and removable partial denture may necessitate reestablishment of the original occlusal relationship
it is not unusual for a patient to complain of looseness of the maxillary complete denture and request relining of that denture when actually it is the removable partial denture that needs relining
evidence of rotation of the distal extension removable partial denture about the fulcrum line must be the deciding factor as to whether relining needs to be done
a closed-mouth impression procedure is indicated when relining the bilateral distal extension RPD
an open-mouth impression procedure is indicated when relining the bilateral distal extension RPD

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107 MCQs in Prosthodontics

2009-03-17T10:47:00.001+05:30

All of the following are principal objections to the use of a U-shaped maxillary removable partial denture major connector, except

its lack of rigidity, compared to other designs, may induce torque or direct lateral force to abutment teeth
the design fails to provide good support characteristics and may permit impingement of tissues underlying its palatal borders when subjected to occlusal loading
bulk to enhance rigidity results in increased thickness in areas most frequented by the tongue
movement is particularly noticeable and is traumatic to the residual ridge in distal extension removable partial dentures when posterior tooth support is nonexistent
the lack of interfacial surface tension between the metal and tissues reduces the amount of retention of the prosthesis

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106 MCQs in Prosthodontics

2009-03-17T10:43:00.001+05:30

All of the following statements concerning major connectors are correct, except

at least 8 mm of vertical space between the active floor of the mouth and gingival margins of the teeth is required for a mandibular lingual bar major connector
in the maxillary arch, the border of the major connector should be at least 6 mm from the gingival crevice of the teeth
in the mandibular arch, the border of the lingual bar major connector should not be closer than 2 - 3 mm to the gingival margins
the border of the maxillary major connector should be scalloped to mimic the gingival crevices of the teeth
the border of the mandibular major connector should run parallel to the gingival margin of the teeth

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105 MCQs in Prosthodontics

2009-03-17T10:37:00.001+05:30

All of the following are correct statements concerning an occlusal rest, except

the rest prep should extend one-half the buccolingual width of the tooth from cusp tip to cusp tip
the rest prep should extend on-third to one-half the mesiodistal width of the tooth
the rest seat is prepared such that the deepest portion is at the marginal ridge
the rest measures between 1.0 to 1.5 mm thick where it crosses the marginal ridge
the occlusal rest seat is prepared so that the enclosed angle formed by the floor of the rest seat and a line dropped down the proximal surface of the tooth must be less than 90 degrees

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104 MCQs in Prosthodontics

2009-03-17T10:33:00.002+05:30

All of the following describe a reciprocal clasp arm, except

it is placed above the height of contour
it is a rigid clasp arm
it must contact the tooth after the retentive clasp arm passes over the height of contour
it must contact the tooth before the retentive arm passes over the height of contour
ideal placement should be at the junction of the gingival and middle third of the abutment tooth crown

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103 MCQs in Prosthodontics

2009-03-17T10:29:00.001+05:30

Which of the following is not a function of an indirect retainer?

a part of the RPD that assists the direct retainers in preventing displacement of distal extension denture bases by functioning through lever action on the opposite side of the fulcrum line
it tends to reduce anteroposterior tilting leverages on the principle abutments
contact of the minor connector with vertical tooth surfaces aids in stabilization against horizontal movement of the denture. Such tooth surfaces, when made parallel to the path of placement, may also act as auxiliary guiding planes.
anterior teeth supporting indirect retainers are splinted against lingual movement
aids in retention of the RPD by increasing the strength of the direct retainers by redistributing the forces to all areas of the mouth.

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102 MCQs in Prosthodontics

2009-03-17T10:25:00.002+05:30

Which of the following are true about gypsum bonded casting investments?

1. should be allowed to set a minimum of 45 minutes

2. should be heated no longer than 30 minutes at 900 degrees F

3. the mold temperature should not exceed 1200 degrees F

4. used for alloys with melting temperatures exceeding 1800 degrees F

5. ideal mold temperature for hygroscopic technique is 875 degrees F

1, 2, 3, 5
1, 3, 5
2, 3, 4
all of the above
none of the above are correct statements

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101 MCQs in Prosthodontics

2009-03-17T10:18:00.001+05:30

The tripping action of Stone refers to

the water / powder proportion of the mix
the removal of a suprabulge clasp
the framework is more retentive on a cast than in the mouth
the removal of an infrabulge clasp
none of the above

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100 MCQs in Prosthodontics

2009-03-16T20:12:00.001+05:30

The direction that dislodging forces unseat a RPD depends upon

the location of rests
denture base retainers
guideplates, retainers, and minor connectors
chance
holding power of denture base adhesives

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99 MCQs in Prosthodontics

2009-03-16T20:07:00.002+05:30

As dislodgement occurs, clasps act to keep a RPD seated. This action is enhanced by the anteriorly located occlusal rest which is known as an occlusal rest serving the function of an

indirect retainer
fulcrum relocator
lever arm lengthener
impingement protector
direct retainer

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