C(Dental Caries, Conservative Dentistry, Dental Materials, Prosthodontics and Materials)

8/11/2019 C(Dental Caries, Conservative Dentistry, Dental Materials, Prosthodontics and Materials)

1/37

C

DENTAL CARIESCONSERVATIVE DENTISTRY

DENTAL MATERIALS

PROSTHODONTICS AND MATERIALS


2/37

.MCQ Questions ADC Preliminary eamination Version !."

All of these questions are based on what people remembered after exams SO IT CAN

NOT BE RELIE ON !""# but it is the onl$ wa$ to %et an idea about the sub&e'ts(matters and topi's $ou would be as)ed about* +lease add whate,er $ou 'an after the

exam ends and )eep this sample in the hands of an$ who is sittin% the exam* B$ the wa$it too) me about - months to %et this or%anised the wa$ it is now*

T.AN/S to all who ha,e 'ontributed to this and to all who will*.adi

Note: There may be wrong answers given in the answer list!

#. $or lo%er &remolars' t(e &ur&ose o) in*linin+ t(e (an,&ie*e lin+ually is to'

A. Avoid buccal pulp horn

B. Avoid lingual pulp horn

C. Remove unsupported enamelD. Conserve lingual dentine

Ans A

!. $or an amal+am restoration o) a %ea-ene, *us& you s(oul,'

A. reduce cusp by mm on a lat base or more resistance

B. reduce cusp by mm ollowing the outline o the cuspC. reduce mm or retention orm

Ans A

. /e)ore )illin+ a *lass V a0rasion *a1ity %it( 2IC you s(oul,'

A. Clean with pumice" rubber cup" water and wea# acidB. Dry the cavity thoroughly beore doing anything

C. Acid itch cavity then dry thoroughly

Ans A $lace the rubber dam" debride the cavity with non luorited lour o pumice andwater slurry in a rubber polishing cup"rinse thoroughly and dry.Apply $oliacrylic Acid

%&'

3. 4(i*( o) t(e )ollo%in+ statement a0out t(e ,e)e*ti1e mar+ins o) amal+am

restorations is true5

A. The larger the brea#down" the greater the chance o decay.

6. T(e retention &in in an amal+am restoration s(oul, 0e &la*e,'

A. $arallel to the outer wall

B. $arallel to the long a(is o tooth

Ans A


3/37

7. T(e 0est %ay to *lean a *a1ity 0e)ore t(e &la*ement o) 2IC is'

A. )*B. $hosphoric Acid

C. $olyacrylic acid

Ans C Apply $oliacrilic Acid %& seconds" rinse throughly or %&'with air+water spray" and

dry lightly " do not desiccate

#8. 4(at is t(e se9uen*e )rom su&er)i*ial to t(e ,ee&est in ,entine *aries5

A. ,one o bacterial penetration" demineralisation" sclerosis" reparative dentine

B. ,one o bacterial penetration" reparative dentine" demineralisation" sclerosis.C. ,one o bacterial penetration" sclerosis" reparative dentine" demineralisation.

Ans A -n the earliest stages o e(posure to microorganisms" there is an eort to seal the

tubules.This is accomplished by increased calciication. #nown as transparent dentinor" better" dentinal sclerosis. -n addition" pulpal odontoblasts" stimulated by the

advancing carious lesion" will rapidly deposit dentin. The dentinal tubules in this new

dentin are irregular" ma#ing them less permeable" newly+ormed dentin/ the reparative dentin" secondary dentin" and tertiary dentin all have been used.

:7. O) all t(e )a*tors t(at in*rease t(e resistan*e o) teet( to ,ental *aries' THE MOST

E$$ECTIVE is'

A. The general nutrition o a child during the period o tooth ormation

B. The inta#e o luoride during the period o enamel minerali0ation and maturationC. $eriodic topical luoride application by dental health care ollowing tooth eruption

D. 1uicient inta#e o calcium and 2itamin D during the period o enamel minerali0ation

and maturation

Ans B

76. t(e &ul& (orn most li-ely to 0e e&ose, in t(e &re&aration o) lar+e *a1ity in

&ermanent molar toot( is'

A. 3esio45ingual in upper irst molars

B. 3esio4Buccal in upper irst molarsC. Disto4buccal in lower irst molars

D. 3esio45ingual in lower irst molars

6. 3esio+ Buccal in lower irst molar

Ans B

;. $or ,ental *aries to &ro+ress in ,entine'

A. The dentine must contain soluble collagenB. 6namel must contain glycoproteins

C. Diet must contain simple carbohydrate

D. Diet must contain polysaccharides6. $ulp must contain complement

Ans C


4/37

;3. Stre&to*o**us mutans utilises %(i*( su0tra*t to )orm ,etran'

Reer to Boucher 3icrobiology

A. 7lucose

B. 8ructoseC. 1ucrose

D. Amylopectin

6. De(trans

Ans C

#"#. 4(at is Miller

A. Always should be perormed to minimise marginal lea#age

B. 1hould not be perormed because it might damage the ad=acent tooth

C. >hen e(tra retention is re;uiredD. *nly in situations where cavity is shallow to avoid pulp irritation

Ans A


5/37

#". 4(i*( &in system (as &ro1en to 0e t(e most retenti1e

A. 1el tapping threaded pin

B. 8riction pea# pin

C. Cemented pin

Ans A

##. Re*onstru*tin+ t(e o**lusal anatomy is 0ase, on>

A. 8unctional actors

B. Depth o restoration on a tooth

C. Necessity to restore normal anatomy

Ans A

#. 4(en ,o you )inis( *om&osite resin restorations>

A. -mmediately ater curing

B. Ater ? hours

C. A wee# ater placement

Ans A

#;. 4(at is t(e most *ommon )ra*ture o) Class II amal+am restorations>

A. -sthmus because o insuicient depth

B. -nternal ractureC. 3arginal ridge site

Ans A

#3". 4(at is t(e a,1anta+e o) *om&osite o1er sili*ate resin>

A. 5ess shrin#age

B. 5ess surace erosionC. 5ess water absorption

D. All o the above

Ans D

#3#. T(e settin+ e&ansion o) *astin+ in1estment is a&&roimately

A. to .%

A. *cclusion

B. 1ot tissues changesAns A

#83. T(e )o1ea &alatini is a lan,mar- to ,etermine t(e &osterior 0or,ers o) u&&er

,enture in %(i*( re+ar,>

A. $ost dam

B. 8langes

Ans A

#86. Attrition is'

A. $rocess o normal wear o teethB. 5ost o teeth substance as a result o chemical e(posure

Ans A

#88. Mo,ulus o) elasti*ity is ,e)ine, as>

A. The stress at the proportional limit

B. The stress+strain ratio within the proportional limit

Ans B

#8:. Tissue *on,itionin+ materials> Sili*on linin+ materials

A. are more resilient than plastic acrylic

B. can minimise any bacterial colonies

Ans A

#8;. T(e &osition o) t(e lin+ual *us& o) a maillary )irst &remolar ,urin+ settin+ o)

teet( an, ono**lusal 1ie% is &ositione,>

A. Distally

B. 3esially

C. Central buccolingually


8/37

#:!. Transillumination is use, to ,ete*t >

A. intrinsic tooth coloration

B. caries

C. $ulp+stones

D. )emorrhagic pulp6. Calculus

Ans B

#::. Ho% ,o you treat ,entine 0e)ore a&&lyin+ 2IC

A. ConditionerB. $umice E water

AnsA and B

#:7. T(e )irst ste& in t(e treatment o) erosion is>

A. $umice and water

B. 1pray with Na+bicarbonateC. 7-C

Ans A

#7!. Poly1inyl im&ression material are'

A. The most stableB. The most resistant to heat

Ans A

#73. 4a &atterns ARE NOT to 0e le)t on t(e 0en*( )or lon+ time 0e*ause o)'

A. Distortion

B. 5ost o elasticity

Ans A

!"6. In meltin+ +ol,' %(i*( &art o) )lame %illl you use'

A. Reduced 0one

B. *(idi0ing 0one

Ans A

!":. I) t(e in1estment is 0urne, out ra&i,ly' %(at %ill (a&&en>

A. Bac# pressure porosity

B. Crac#ing o the investment

Ans B


9/37

!"7. 4(at is t(e DISADVANTA2E o) +y&sum ,ies>

A. >ea# edge strength and lac# o surace details

B. Dimensional inaccuracy

Ans A!";. O1er,enture a,1anta+e is'

A. $roprioceptors

!##. Hy0ri, *om&osite resin is use, in &osterior teet( 0e*ause it>

A. Contains micro illedB. Better colour matching

Ans A

!#. 4rou+(t metal is to 0e'

A. 3arble

B. FuenchedC. 1ub=ected 9undergone9 to cold treatment during processing GannealedH

Ans C

!#3. 4(ere ,o you use t(e )loss as a +ui,e to t(e ru00er ,am>

A. Through the contacts.

!3. 4(i*( o) t(e )ollo%in+ may 0e *ause, 0y a ne%ly &la*e, restoration %(i*(

inter)eres %it( t(e o**lusion

A. Apical abscessB. $ulpal necrosis

C. Apical periodontitis

Ans C

!66. An im&ression %it( elastomer in *ustom tray (as 0een ta-en )or *ro%n

&re&aration= it %ill 0e t%o ,ays 0e)ore t(e im&ression +ets to t(e la0oratory

)or*onstru*tion o) t(e *ro%n. 4(i*( im&ression material is &re)erre,5

A. $olyether

B. Thio#ol or meraptan rubberC. Condensation silicone

D. 2inyl polysilo(ane

Ans D


10/37

!68. A lar+e amal+am *ore is to 0e *on,ense, aroun, se1eral &ins in a 1ital molar

toot(= %(at ty&e o) amal+am mi %oul, you &re)er>

A. A large mi( to ensure homogeneity

B. A large with e(tra mercury to give easier manipulative ;ualitiesC. 1everal small mi(es" se;uentially triturated

D. 1everal small mi(es with varying mercury9alloy ratios

6. A basic mi( to which additional mercury is added as needed

Ans C

!6:. Mi*ro?lea-a+e at t(e atta*(e, enamel?*om&osite resin inter)a*e is most li-ely

to 0e ,ue to>

A. )ydrolysis o the iller phase o the composite

B. )ydrolysis o the resin phase o the compositeC. Bacterial acid ormation dissolving the enamel

D. 1alivary pellicle growth at the interace

6. 1etting contraction o the composite resin

Ans 6

!67. T(e o&timum *a1osur)a*e an+le )or o**lusal amal+am sur)a*e is>

A. ?&+@IB. J+&I

C. ?&+I

D. K&+%%I

6. %+%&I

Ans D

!6;. A maor ,i))eren*e 0et%een li+(t *ure, an, *(emi*al *ure, *om&osite is t(at

,urin+ settin+ or in )un*tion t(e li+(t *ure, material ten,s to>

A. 1eal the margins better and completely

B. 6(hibit less wear on time

C. Lndergo greater colour change

D. 1hrin# more rapidly6. $osses greater racture toughness

Ans D


11/37

!8". I) t(e sealant o) 0on,in+ a+ent is not &la*e, on &art o) enamel t(at (as 0een

et*(e, 0y an a*i, solution= you %oul, e&e*t>

A. Arrest o enamel carries by organic sulphides

B. The enamel is to return to normal within J daysC. Continued enamel declassiication in the etched area

D. 1light attrition o the opposing tooth

Ans B

!8#. 4(en restorin+ %ea-ene, *us&s %it( ,ental amal+am you s(oul, *onsi,er>

A. mm reduction while orming a lattened surace

B. mm reduction while ollowing the original contour o the cuspsC. ?mm reduction while orming a lattened surace

D. ?mm reduction while ollowing the original contour o the surace

Ans A

!8!. T(e 0ur s(oul, 0e tilte, lin+ually %(en &re&arin+ t(e o**lusal sur)a*e o)

*lassII *a1ity on a man,i0ular )irst &remolar in or,er to>

I. Remo1e unsu&&orte, enamel

II. Pre1ent en*roa*(ment on t(e 0u**al &ul& (orn

III. Pre1ent en*roa*(ment on t(e lin+ual &ul& (orn

IV. Maintain ,entinal su&&ort o) t(e lin+ual *us&

A. - and --

B. - and ---

C. -- and -2D. --- and -2

6. -2 only

Ans C

!83. In re+ar, to *ar0i,e 0urs= t(e more num0er o) *uttin+ 0la,es an, lo% s&ee,

%ill result in>

A. 5ess eicient cutting and a smoother surace

B. 5ess eicient cutting and a rougher surace

C. 3ore eicient cutting and a smoother suraceD. 3ore eicient cutting and a rougher surace

Ans A


12/37

!86. $or an onlay &re&aration' %(i*( o) t(e)ollo%in+ is t(e MOST E$$ECTIVE

means )or 1eri)yin+ a,e9uate o**lusal*learan*e

A. >a( bite chew in

B. $roper depth cuts

C. 2isual inspectionD. Articulating paper

Ans A

!88. C(oose a statement t(at *orre*tly ,e)ines t(e term AMAL2AM>

A. Amalgam is a metallic powder composed o silver" tin" copper and 0inc

B. Amalgam is an alloy o two or more metals that have been dissolved in each

other in the molten state.

C. Amalgam is an alloy o two or more metals" one o them is mercuryD. Amalgam is a metallic substance in powder or tablet rom that is mi(ed with

mercury

6. Amalgam is an alloy o two or more metals" one o them is tin

Ans C

!8:. At %(i*( an+le to t(e eternal sur)a*e o) &roimal *a1ity %alls s(oul, a *lass

II &re&aration )or amal+am 0e )inis(e,

A. An acute angle

B. An obtuse angle

C. A right angle

D. An angle o ?&I

Ans C

!76. 4(i*( o) t(e )ollo%in+ is true re+ar,in+ &re&aration o) *ustom tray )or

elastomeri* im&ression>

A. Adhesive is preerred over perorationB. $eroration provides ade;uate retention

C. Adhesive is applied immediately beore procedure

D. $erorations are not made in the area over the prepared tooth

Ans A!77. T(e $o1ea Palatinae are>

A. 8oramina covering the lesser palatine nerves and vesselsB. 3orphologically related to the ormation o the prema(illa

C. 5ocated on either sides o the midline close to the =unction o the hard and

sot palateD. Closely related to the rugae o the palate

Ans C


13/37

!7;. 4(i*( o) t(e )ollo%in+ restoration material

A. Amalgam

B. Composite resin

Ans B!;". 4(i*( one o) )ollo%in+ statement a0out O1er,enture is not *orre*t>

A. 7reater occlusal loads can be applied by the patientB. Retention and stability are generally better than with conventional complete

denture

C. Alveolar bone resorption is reducedD. The retained roots are covered by the denture thus protecting them rom

caries and periodontal diseases

Ans D!;#. 4(i*( o) t(e )ollo%in+ is a maor ,isa,1anta+e to imme,iate *om&lete

,enture t(era&y>

A. Trauma to e(traction site

B. -ncreased the potential o inection

C. -mpossibility or anterior try inD. 6(cessive resorption o residual ridge

Ans C

!;8. In re+ar, to t(e +lass o) 9uart@ &arti*les o) )illin+ restorati1e resin= t(e

mi*ro)ill resins ten, to (a1e'

A. A higher coeicient o thermal e(pansion and a higher crashing strengthB. A higher coeicient o thermal e(pansion and a lower crashing strength

C. A lower coeicient o thermal e(pansion and a higher crashing strength

D. A lower coeicient o thermal e(pansion and a lower crashing strength

Ans B

!;:. Mer*ury is ,an+erous %(en it turns into 1a&our )orm 0e*ause o)'

A. -t is accumulative and causes liver poison

B. -t is accumulative and causes #idney poison

C. -t induces neoplasia in the liverD. -t is accumulative and causes brain poison

6. -t induces neoplasia in the brain

Ans D


14/37

!;7. T(e elasti* limit may 0e ,e)ine, as t(e '

A. The ma(imum stress under tension that can be induced without ailure

B. The ma(imum elongation under tension that can be measured beore ailure

C. The minimum stress re;uired to induce permanent deormation o a structure

D. 3inimum stress in structure6. 3a(imum strain that can be measured.

Ans C

!;;. Ran- t(e )ollo%in+ im&ressions materials a**or,in+ to t(eir )lei0ility

A. AlginateM $olysulphideM 1iliconeM ,inc *(ide 6ugenolB. 1iliconeM AlginateM $olysulphideM ,inc *(ide 6ugenol

C. AlginateM $olysulphideM ,inc *(ide 6ugenolM1ilicone

D. AlginateM 1iliconeM $olysulideM ,inc *(ide 6ugenol

6. AlginateM ,inc *(ide 6ugenolM 1iliconeM $olysulphide

Ans A

"". Denture resins are usually a1aila0le as &o%,er an, li9ui, t(at are mie, to

)orm a &lasti* ,ou+(= t(e &o%,er is re)erre, to as'

A. -nitiatorB. $olymer

C. -nhibitor

D. 3onomer6. Dimer

Ans B

"#. 4(i*( one o) t(e )ollo%in+ is t(e maor ,isa,1anta+e o) stone ,ies use,)or*ro%n )a0ri*ation'

A. They lac# accurate reproduction o surace detailsB. Their overall dimensions are slightly smaller than the original impression

C. The strength o the stone

D. The ha0ard o aspiration o to(ic materials during trimming o the dies.

Ans A

"!. 2lass Ionomer Cement sets 0e*ause o)'

A. Acid+Base reaction

B. Addition polymerisation reaction

C. 7rowth o glass crystalsD. 1lip plane loc#ing

6. 1olvent evaporation

Ans A


15/37

". T(e arti*ular sur)a*e o) t(e normal tem&oroman,i0ular oint are line, %it('

A. A specially adapted" highly ibrous tissue

B. )yaline cartilage

C. Chondroitin+@+phosphate

D. )ighly vesiculated tissues

Ans A

##. T(e most resistant )illin+ materials to )ill *lass IV *a1ities are>

A. Resins with silicone dio(ide G1i*H

B. Resins with glass or ;uart0C. 1ilico+phosphate

D. 1ilicates

Ans B#!. 4it( ,entin 0on,in+ a+ent' you a&&ly>

A. 8irst acid etching to dentine and then bonding agentB. Bonding agent directly to dentine

C. Chelating agent G6DTAH and bonding agent

Ans C

!". 4(at is t(e )un*tion o) +y&sum?0in,er in t(e in1estment>

A. 1etting and hydroscopic

B. 1trength and rigidity

Ans B!6. 4(at )a*tor ,o you *onsi,er t(e most im&ortant %(en restorin+ t(e o**lusal

&art o) a toot(>

A. *cclusal anatomy

B. 8unction

Ans B

!7. 4(i*( material is not *om&ati0le %it( *om&osite resin>

A. ,inc *(ide eugenol G,*6HB. CaG*)H

C. Carbo(ylate

D. ,inc phosphate cement

Ans A


16/37

!;. Toot( un,er o**lusal trauma may s(o%>

A. Bone resorption

B. Necrosis o the pulp

C. )ypercementosis

D. Triangulation6. All o the above

Ans 6

;. T(e 0est lo*ation o) &in in *lass II inlay is'

A. >here the biggest thic#ness isB. 3esial and distal angle

C. Contact area

Ans A3". Class V *om&osite resin restorations *an 0e &olis(e,'

A. ? hours ater applicationB. -mmediately ater application

C. to ? days

D. to ? wee#s6. Not at all

Ans B

3#. Caries %(i*( is *lose to t(e &ul& *(am0er= on rays you )in, F,ens in ,ente

A. ,inc o(ide eugenol cement and amalgam

B. $ulpectomy

C. $ulpotomyD. Calcium hydro(ide on pulp and amalgam

Ans D

3. T(e main a,1anta+e o) amal+am %it( (i+( *ontent o) Cu is>

A. Better marginal sealing

B. 5ess corrosionC. Better tensile strength

D. )igher and immediate compressive strength

Ans B


17/37

33. T(e maor ,isa,1anta+e o) sel)?t(rea,e, &ins is>

A. 8riction loc#ed

B. Too e(pensive

C. Not all si0es available

D. 3ay cause tooth crac#ing

Ans D

36. In %(i*( *lass o) *a1ities ,o *om&osite restorations s(o% most ,ura0ility>

A. -

B. --C. -2

D. ---

6. 2

Ans D

38. Ho% mu*( s&a*e ,o you nee, to *a& a %ea-ene, *us& %it( amal+am>

A. %mm

B. %.&mm

C. mmD. .&mm

Ans C

3:. B&&er )irst &remolar %it( MO *a1ity= %(at is im&ortant a0out t(e a&&li*ation

o) t(e matri 0an, t(e 9uestion (as also s(o%n too as G.4(at is

*om&li*ate, 0y>

A. The mesial concavity o the root surace

B. 1mall lingual pulp

C. )igh buccal pulp hornD. )igh lingual pulp horn

6. Concavity o distal root surace

Ans A

37. Et*(in+ te*(ni9ues are use, al%ays to>

A. minimise the lea#age o restorationsB. or aesthetic considerations

Ans A

6!. 4(y *an Class IV +ol, not 0e use, in *a1ity as a )illin+ material>

A. Can not be polished burnished'B. The corrosive properties

Ans A


18/37

66. In re+ar, to in,ire*t *om&are, to ,ire*t %a te*(ni9ue' %(at *(ara*teristi*s

must t(e %a (a1e>

A. 5ow temperature solidiying point

B. )ard in room temperature

C. )igher low in room temperature

Ans B

68. I) amal+am +ets *ontaminate, %it( moisture' t(e most un*ommon result is>

A. Blister ormation

B. $ost operative painC. 1econdary caries

D. 5ower compressive strength

Ans AAnswer should be blister ormation..this is the most uncommon result

3"#. 4(i*( o) t(e )ollo%in+ (as t(e (i+(est su*rose *ontent>

A. -ce cream

B. Canned =uiceC. Cough syrups

D. Brea#ast cereal

6. 1weet potato

Ans C

3##. Ho% *an you im&ro1e t(e a,(esion o) a )issure sealant>

A. Acid etching techni;ue

3#!. T(e a,1anta+e o) usin+ ,ental )loss o1er ru00er &oint inter,entally>

A. Remove pla;ue and debris in interpro(imal suraces

B. $olishC. 3assage o the interdental papillae

D. Aid and recognise subgingivally

Ans A3#. A)ter &ro&(yla*ti* treatment' you ,e*i,e to *(an+e t(e )lora to a non?

a*i,o+eni* 0y *(an+in+ t(e ,iet. Ho% lon+ ,oes it ta-e to a*(ie1e t(is *(an+e>

A. 8ew wee#s

B. 1everal months or longer

Ans B


19/37

3#3. 4(i*( one o) t(e )ollo%in+ is a non?*alorie s%eetener>

A. 3annitol

B. 1accharin

C. Oylitol

Ans C

3. 4(at is t(e MOST im&ortant role o) sali1a in &re1entin+ ,ental *aries>

A. Buering action

33. A &atient *omes %it( a la*to0a*illus o) more t(an #""'""" ? %(at is your

a,1i*e>

A. Reduce sugar in diet

36. T(e MOST *ario+eni* su+ar is>

A. 1ucrose

383. Pin Restoration %it( %(i*( material (as t(e 0est retention>

A. AmalgamB. 7old inlay

C. Composite

D. 7lass -onomer

Ans A

387. 4(i*( im&ression material s(oul, NOT 0e -e&t in %ater %it(in on (our> in

anot(er &a&er it %as> " mins 0e)ore &ourin+

A. $olyether

B. Condensation siliconeC. $olyvinyl silicone

Ans A

38;. Hi+( *o&&er amal+am lasts lon+er t(an lo% *o&&er amal+am 0e*ause o)>

A. -ncreased compressive strength

B. -ncreased corrosion resistanceC. )igh creep

D. -ncreased tensile strength

6. Decreased setting e(pansion

Ans B


20/37

3:". Porosity in a*ryli* ,entures is *ause, 0y'

A. Contraction porosity in thic#est point o the denture

B. -nsuicient pressure during las#ing

Ans B3:3. 4(y %oul, you *ast +ol, in (ot moul,>

A. To compensate or the e(pansion o investment.

3:6. I) tem&orary *ementation is re9uire,' %(i*( *ement %ill you use>

A. ,*6

B. ,inc $olycarbo(ylate

C. 7-C

Ans A

3:;. 4(i*( *ement is less solu0le in t(e oral *a1ity>

A. $olycarbo(ylate

B. ,inc phosphate

C. 1ilicate phosphateD. 7-C

Ans D

37". A &atient %it( reasona0le oral (y+iene (as a small &roimal *aries on t(e

&remolar. T(e &atient re9uests an aest(eti* )illin+. Your &re&aration %ill 0e>

A. 1ame as amalgam with cavo+surace bevelsB. $ro(imal caries removal with occlusal E gingival bevels

Ans B

3;". 4(i*( o) t(e )ollo%in+ is t(e most si+ni)i*ant )a*tor re+ar,in+ )iller in

*om&osite )or in*rease, stren+t(>

A. $article si0e %+ micron

B. 1ub micron si0ed particles

C. )igh concentration o the iller particles

Ans C3;#. A &atient (as a small in*isal )ra*ture o) t(e maillary in*isor. 4(i*( is t(e

0est material to resist )ra*ture at t(e a*i, et*(e, toot( *om&osite inter)a*e>

A. 3icro+illed composite

B. )ybrid composite

C. 7-CD. 1ilicate

Ans B


21/37

3;:. T(e 0est met(o, o) *leanin+ an, toilet *a1ity>

A. Alcohol

B. Citric acid

C. >ater

D. *rganic acid

Ans C

68. T(e &ul&al )loor o) t(e Class II *a1ity )or a man,i0ular )irst &remolars(oul,

0e>

A. $arallel to occlusal planeB. $erpendicular to long a(is

C. Tilted lingually

Ans C6:. Mar+inal lea-a+e at t(e &roimal +in+i1al *a1osur)a*e o) a re*entlyrestore,

*lass II *an 0e *ause, 0y>

-. -nsuicient condensation

--. 8irst pro(imal increment was too large

---. Neglecting to wedge the matri(-2. )and manipulation instead o mechanical

2. Debris contamination

A. -" --" ---

B. --" ---" -2

C. -" --" 2

D. None o the above6. All o the above

Ans C

67. 4(at is t(e ,an+er o) usin+ air as a *ooler ,urin+ *a1ity *uttin+>

A. )ypersensitivityB. *dontoblast is drawn into the tubule

Ans B

63:. Sel) &olymerisin+ a*ryli* resins ,i))er )rom (eat *ure, resins 0e*auset(eye(i0it>

A. )igher molecules weightB. )igher content o residual monomers

Ans B


22/37

63;. T(e *ontra*tion 2aseous &orosity in inlays is relate, to>

A. *verheating o the alloy

B. 3olten gases

C. Diameter o the sprue

D. *verheating o investment

Ans B

66". 4(ere %oul, you e&e*t to )in, t(e Mylo(yoi, in relation to &eri&(ery o)

*om&lete ,enture>

A. 3andibular buccal in the midlineB. 3andibular lingual in the midline

C. 3andibular disto buccal area

Ans B66#. Class V lesions may ori+inate>

A. -n lingual pitsB. -n buccal issures

C. $oor oral hygiene

Ans C

66!. Retention )or o**lusal amal+am *a1ities in &remolars is /EST &ro1i,e, 0y

A. 1lightly undercutting o walls with inversed cone bur

B. 3esial and distal undercuts

C. Buccal and lingual undercuts

Ans C

667. Denture (y&er&lasia is +enerally attri0ute, to>

A. $oor oral hygiene

B. Denture movement

Ans B

66;. In *om&lete ,entures' *(ee- 0itin+ is most li-ely a result o)>

A. Reduced *ver=et o posterior teeth

B. -ncreased vertical dimensionC. Teeth have large cusp inclines

Ans A

68". Restin+ )a*e (ei+(t in e,entulous &atients>

A. Decreases when head is tilted bac#

B. -ncreases when lower denture is insertedC. Does not change over time

Ans C


23/37

68#. Ala?Tra+al line is>

A. The line running rom the tragus o the nose to ala o the ear

B. A guide used to orient the occlusal plane

C. $arallel to 8ran#urt hori0ontal plane

D. A guide to the occluding ace height in complete denture.

Ans B

68!. De*ision to em&loy *us&e, or %it(out *us&s teet( is in)luen*e, 0y>

A. Reverse *ver=et

B. T3P problemsC. Cranio mandibular s#eletal relationship

Ans B

686. 4(at is an im&ortant re9uisite )or )illers in ,ental *om&osite restorati1eresinsin loa, 0earin+ areas>

A. 1ub micro si0ed particlesB. )igh coeicient o thermal e(pansion

C. )igh in content G)igh illerH

Ans C

688. Sensiti1ity to (ot an, *ol, )oo,s soon a)ter *a1ity &re&aration an,&la*ement

o) 2IC an, *om&osite resin in an u&&er in*isor toot( is ,ue to>

A. 3echanical trauma due to cavity preparation

B. Chemical

C. )eat rom 7-C settings

Ans A

6:#. In re+ar, to C(lor(ei,ine mout( %as(>

A. -s anionic

B. Lsed in .< concentrationC. Lsed in .%< concentration

D. $enetrates the gingival crevice9poc#et

Ans B

6:;. A &atient is resistant to *aries 0ut (as a &erio,ontal ,isease. In t(is *ase'su*rose in ,iet is im&ortant 0e*ause>

A. 1ucrose is greatly involved in pla;ue developmentB. 1. mutans produces 5evans rictions which are used by periodontal

pathogens

C. The streptococcus mutans cannot survive with a continual supply o sucroseD. 6(isting pla;ue must continue to get sucrose in order to grow

Ans A


24/37

67". Cario+eni*ity o) Stre&to*o**us mutans is 0e*ause o) t(e &ro,u*tion o)>

A. 7lucans

B. 5evans

C. 8ructans

D. 1ucrose

Ans A

6;3. In *lass II &re&aration it is ,i))i*ult to &la*e t(e +in+i1al seat %(en

&re&aration is eten,e, too +in+i1ally 0e*ause t(e>

A. 6namel rods are directed occlusallyB. 3ar#ed cervical constriction

Ans B

8#:. 4(at is %ron+ in re+ar, to %ater et s&ray (y,rot(era&y>

A. Does not harm gingivae

B. Removes pla;ueC. Removes re;uired pellicle

8:7. In )ull ,entures &orosity in t(e most t(i*-est area is ,ue to>

A. 7aseous porosity

B. 1hrin#age porosity

Ans A

8:;. T(e most *ommon *ause o) )ra*ture at t(e ist(mus o) *lass II ,entalamal+am

restoration is>

A. Delayed e(pansion

B. -nade;uate depth at the isthmus areaC. -nade;uate width at the isthmus area

D. 3oisture contamination o the amalgam during placement

Ans C

:!3. Class III *a1ity is >

A. $ro(imal cavity slightly gingival to the contact area

:!6. Terminal Hin+e Ais *an 0e o0taine, 0y>

A. 8ace bow

B. Qinematic ace bow

C. Articulator

Ans B


25/37

:7. Com&are, to ,ental &laster all ,ie stones>

A. Re;uire less gauging water

B. Re;uire more gauging water

C. Re;uire the same ;uantity o gauging water

D. Are beta+hemihydrate6. None o the above

Ans A

:;. T(e MOST e))e*ti1e manner to &ro,u*e a (ar, sur)a*e on a *ast is 0y>

A. 6mploy as much water as possible on mi(ingB. 6mploy as little water as possible on mi(ing

C. Adding < o bora( to the mi(

D. Adding calcium tetraborate

6. None o the above

Ans B

:3". 4(en ,ry *ast is immerse, in %ater saturate, %it( *al*ium sul&(ate>

A. There is contraction

B. There is negligible e(pansionC. There is deinite e(pansion

D. There is no change

6. None o the above

Ans B

:3#. $usion tem&erature o) im&ression *om&oun, s(oul, o**ur>

A. Below mouth temperature

B. Above mouth temperature

C. As o the s#in temperatureD. At the room temperature

6. None o the above

Ans B

:3!. T(e )lo% o) t(e )ollo%in+ &er*enta+e is allo%a0le )or im&ression*om&oun,

ty&e I at t(e oral tem& o) :

A. @

A. The emulsoid type

B. The suspension typeC. The sol type

D. The gel type

6. None o the above

Ans A

:38. Elastomers are>

A. )ydrophilic

B. )ydrophobic

C. >ater+loving impression materialD. $otassium alginates

6. None o the above

Ans B

:3:. T(e &olysul)i,e ru00er im&ression materials are>

A. Not sensitive to temperature when curingB. Fuite sensitive to temperature when curing

C. 5ess sensitive to temperature than silicone rubber

D. The same sensitivity to temperature as silicone rubber6. None o the above

Ans B


27/37

:37. T(e elasti* &ro&erties o) ru00er im&ression materials>

A. -mproves with time

B. Deteriorates with time

C. Deteriorates when e(posed to temperatureD. -mproves when e(posed to temperature

6. None o the above

Ans A

:3;. T(e e))e*t o) t(e tem&erature risin+ a0o1e #""C on (eat?*ure, ,enture?0ase

a*ryli* resins is>

A. $roduces porosity on the e(ternal portion o the resin.

B. $roduces porosity on the internal portion o the resin.

C. $roduces porosity on the surace o the resin.D. $revents porosity on the interior o the resin

Ans B

:6". T(e &rin*i&le *ause o) )ailure o) amal+am restoration is>

A. -mproperly prepared amalgamB. -mproper cavity preparation

C. $erio involvement

D. $articles o amalgam6. None o the above

Ans B

:6#. Re,u*e, o**lusal area means>

A. 3ore racture potential or amalgam

B. 5ess racture potential or amalgamC. $ulpal involvement

D. $erio involvement

6. None o the above

Ans B

:6!. T(e less mer*ury remainin+ in *on,ense, amal+am>

A. The stronger the restoration which contains ewer matri( alloys and ewer

voids

B. The wea#er the restorationC. The more matri( alloys

D. The more voids

6. None o the above

Ans A


28/37

:6. Hi+( *o&&er amal+ams are su&erior i)>

A. Copper is available or a secondary reaction

B. Copper is not available or a secondary reaction

C. Copper is burnishedD. Copper is ractured

6. None o the above

Ans A

:63. Con*ernin+ *on,ensation o) restorati1e +ol,>

A. -t may vary widely and has no inluence on the inal restoration

B. The degassing procedure is not important

C. -t is the Achilles heel o direct gold restoration

D. Clinical tech are more important than the physical properties o restorativegold

6. All o the above

Ans C

:68. A*i, *on,itionin+ o) enamel an, ero,e, ,entine>

A. $rovides an none traumatic" conservative clinical approach to the bonding o

restorative material

B. -s a traumatic approach to bonding materialsC. -s not a sae and simple method o bonding

D. Bonding ails to produce a highly signiicant retention and good marginal

integrity and clinical durability

6. None o the above

Ans A

:6:. T(e e))e*ti1eness o) t(e a*i, et*( is ,e&en,ent on %(i*( o) t(e )ollo%in+

)a*tors>

A. 3aterial must be used to clean the surace o the tooth prior to etchingB. The eectiveness o the itchant

C. The chemical and physical nature o the tooth

D. The area and surace o the enamel to be itched

Ans C

:67. Cree& in amal+am is t(e +reatest in>

A. 5ow copper lathe cut alloy

::3. 4(en a,(esi1e is use, %it( a &olysul&(i,e im&ression material>

A. 1hould be thin and dry


29/37

::6. 4(en a &ro0e &enetrates 0et%een toot( an, amal+am>

A. -t is not always an indication o caries

::8. Re1ersi0le (y,ro*olloi, im&ression materiasl in *om&arison to al+inate are>

A. Better or undercuts areas

::;. T(e Initiation o) t(e *urin+ &ro*ess in sel) *ure a*ryli* resins is a*(ie1e,

0y>

A. Ben0yl pero(ide

:;#. 4(i*( o) t(e )ollo%in+ 2ol, *astin+ alloys are a1aila0le>

A. 3edium alloy Type --'B. )ard alloy Type ---'

C. 6(tra )ard alloy Type -2'

D. All o the above

Ans D

7#!. T(e )un*tion o) 1arnis(>

A. To reduce initial marginal lea#age 1hort+term lea#age'

B. To prevent long term lea#age

Ans A

7#3. T(e out*ome o) ra&i, %a 0urn out is>

A. Crac#ing o the investment

B. Bac# pressure porosity

Ans A

7#6. T(e MAIN &ur&ose o) 0urnis(in+ is>

A. To help eliminating e(cess mercury

B. To condense margins

C. $olishing o illing

Ans B

7#8. 4(at (a&&ens to et*(e, *om&osite resins a)ter settin+>

A. 6(pand

B. Contract

C. Contract and e(pandD. 6(pand and contract

Ans B


30/37

7!!. 4(i*( *om&osite is use, in loa, 0earin+ areas>

A. )ybrid composite

B. 3icro illed composite

Ans A7!;. 4(at is t(e )un*tion o) )lu>

A. To protect alloy rom o(idation" and distribute metallic o(ides as they areormed

7". 4(at is TRBE>

A. Boiling point o acrylic acid M boiling point o water

B. Boiling point o acrylic acid is similar to that o water

C. Boiling point o acrylic acid S boiling point o water

Ans A %. degree celcius

7#. Por*elain 0on,e, to metal is stron+est>

A. -n compression

B. -n tension

Ans A

737. T(e MOST )re9uently synt(esi@e, su0stan*e 0y Stre&to*o**us mutans is>

A. 5iven

B. 8ructose

C. 7lucanD. 7lycogen

Ans C

76:. 4(at is t(e ran+e o) t(e 1isi0le li+(t *ure 0eam>

A. %+% nmB. + nm

C. ?+? nm

D. ?J nm or ?&+& nm

Ans D Blue light 4 ?@ nm

767. 4(en is a +in+i1al +roo1e LEAST re9uire,>

A. >hen restoring with 7-C or abrasion

B. >hen restoring with 7-C or root caries

C. >hen restoring with 7-C base and composite laminationD. >hen restoring with amalgam

Ans C


31/37

76;. Corrosion an, ,is*olouration o) amal+am restorations is usually *ause, 0y>

A. 1ulphur o(ides

B. *(ygen

C. ChloridesD. *ver trituration

Ans A

78". 4(en you )in, ,it*(in+ in an amal+am )illin+ you %oul,>

A. Replace the deective ilingB. Repair deect with unilled resins

Ans A

786. 4(y ,o you it*( enamel )or *om&osite restorations>

A. To increase surace area

B. To decrease surace areaC. Does not really change the surace area

D. -ncrease the chemical bonding capability

6. Decrease the chemical bonding capability

Ans A

78:. 4(i*( o) t(e )ollo%in+ %ill NOT 0e use, in t(e ,etermination o) 1erti*al

,imension>

A. Aesthetic

B. $honeticsC. 7othic arch tracing

D. 1wallowing

Ans C

787. in* oi,e im&ression material>

A. 3ay cause irritation to mucosa

B. -s a thermoplastic material

Ans A7:#. 4(y ,o you o1er&a*- amal+am>

A. To ensure e(cess mercury reaches the surace


32/37

7:!. A lateral in*isor la0ial to t(e ar*( nee,s to 0e restore, in normal ali+nment

%it( P$M retra*tion. Ho% %ill t(e toot( a&&ear>

A. Too wide

B. Too short

C. To narrowD. To long

Ans C

7:. 4(i*( o) t(e )ollo%in+ *us&s is more &rone to *ra*->

A. Buccal o lower molarsB. 5ingual o lower molars

C. 5ingual o upper molars

D. Buccal o upper molars

Ans B

7:7. An irre+ular s(a&e, 1oi, on t(e sur)a*e o) a +ol, *ast %oul, in,i*ate t(at>

A. A ragment o investment had been carried into the mould

B. Air carried into mould

C. Burning out o wa( was inade;uateD. The powder9water ratio or the investment was too high

Ans A

77". 4(at e))e*t ,o )issure sealants (a1e on *aries &ro+ression>

A. Reduce new caries and hamper the progress o reshly established caries

B. Reduce new caries and hamper the progress o e(isting caries

Ans A

776. In re+ar, to mar+inal lea-a+e in amal+am>

A. The wider the gap the better the chance o secondary caries

B. 1eal the margin with issure sealant would prevent urther brea#downC. 1econdary caries may develop

Ans A

778. Pit an, )issure *aries start at>

A. bottom o the issure

B. walls o the issure

Ans B


33/37

77:. 4(at inter)eres %it( a maillary ,enture in t(e &osterior 1esti0ular )ol,>

A. Coronoid process

B. Condyle

C. 3asseter muscle

Ans A

77;. Ho% lon+ s(oul, a*ryli* sel)?*ure s&e*ial trays 0een ma,e &rior tota-in+

im&ression>

A. % hrs

B. -mmediately ater abricating itC. Ater been let in water or an hour

D. >ait or an hour beore pouring

Ans A7;". T(e MAIN CABSE o) +in+i1itis in &artial?,enture &atients is>

A. $lacement o denturesB. $la;ue accumulation

Ans B

7;8. 4(i*( o) t(e )ollo%in+ is t(e MOST a&&ro&riate relate, to (ar,ness>

A. Tungsten carbideM$orcelainM)uman enamelMacrylicB. $orcelainM6namelMTungsten carbideMamalgamMacrylic

C. $orcelainM6namelMTungsten CarbideMAmalgamMAcrylic

Ans A7;:. Ho% mu*( %oul, you re,u*e a *us& to 0e re&la*e, %it( amal+am onlay>

A. mm to achieve a good retention ormB. mm to achieve a good resistance orm

C. %mm

Ans B

;"#. To in*rease t(e settin+ time o) &(os&(ate *ements you %oul,>

A. Lse a cold glass slab;!. Elasti*ity o) im&ression material %ill lea, to i,eally>

A. $revent distortion when impression is removed out o the mouth

;. A &atient (as 0een *omin+ to your *lini* )or se1eral times *om&lainin+ a0out

soreness un,er t(e ,enture' %(at %oul, you ,o>

A. Chec# occlusion o lower buccal cusps


34/37

;3. 4(at is t(e ,i))eren*e 0et%een ar*on an, non ar*on arti*ulator>

A. -n arcon the condylar element is in the lower compartment

;37. A 1ital toot( (as a *ro%n *emente, to a &in?retaine, amal+am *ore=%(ere,oes a )ailure o**ur>

A. Between crown and cementB. Between core and cement

C. -n the crown and the root

D. -n the core and the margin preparation

Ans B

;68. T(e rou+(est sur)a*e on *ut toot( stru*ture>

A. Cross cut issures at ultra speed

The runout can never be less than the concentricity" and it is usually substantially greater.Runout is the more signiicant term clinically because it is the primary cause o vibration

during cutting and is the actor that determines the minimum diameter o the hole that can

be prepared by a given bur. Because o runout errors" burs normally cut holes measurablylarger than the head diameter.

;6:. T(e num0er o) ,ama+e, +in+i1al tissues a)ter &la*in+ ru00er ,am is +reater

i)>

A. The distance between holes is too big

B. The distance between holes is too smallC. The punctured holes are too big in si0e

D. Not using lubricant when placing rubber dams

Ans B

;7:. In a &osterior 1ital molar %it( a *ore t(e 0est material to restore is>

A. Amalgam

B. Composite resin

C. 7-C

Ans A

;;". in*oi,e?eu+enol im&ression &aste>

A. Can not be used in areas with undercuts

;;#. 4(en restorin+ %it( *om&osite resins' %(y ,o %e ,o t(e *a1o sur)a*e

0e1ellin+>

A. Aesthetic


35/37

;;6. 4(en &re&arin+ a *lass II *a1ity' you noti*e a (ar, ,ar- 0ro%n s&ot on t(e

a,a*ent toot( ust 0elo% t(e *onta*t &oint. T(is is MOST LIJELY

A. Demineralised enamel

;;:. In *a1ity &re&aration #mm 0elo% DEK %(at is seen>

A. 3ore dentinal tubules" some intertubular and peritubularB. 1ome dentinal tubules" more intertubular and less peritubular

C. 3ore peritubular" some intertubular and dentinal tubular

D. 6;ual amount o dentinal tubules" intertubular and peritubular

Ans B

#""". A %ell *onstru*te, *om&lete ,enture>

A. Needs little maintenance

B. Needs less than a wee# or ad=ustment and total success

C. )as adverse eects and decreases taste sensations

Ans C

#""#. To &re1ent *er1i*al resor&tion ,e)e*ts )ollo%in+ internal 0lea*(in+>

A. Remove 7utta $ercha at least mm below C6P or above the crest o alveolar

bone and isolate.

#""!. 4(i*( mus*le a*ts on t(e ,isto?lin+ual *ontour o) lo%er ,enture>

A. 3entalisB. 3asseter

C. 3ylohyoid

D. Buccinator

Ans C

#""8. On eamination o) a *om&osite restoration you )in, a ,ar- stain>

A. Replace the composite

B. Repair with unilled resin

C. Apply topical luoride at the margin

Ans A


36/37

#"":. O**asional sensiti1ity in a s(allo% *lass I amal+am restoration a)ter t%o,ays

%oul, 0e mana+e, 0y>

A. Replace old iling immediately

B. *(ide ,inc and eugenolC. Lsing thic#er mi( o cements

D. Tell patient the discomort will disappear ater ? t o@ wee#s

6. 5edermi(

Ans D

#"#!. Attrition in el,erly' %(y ,o teet( maintain *onta*t>

A. Building bone around the undus o alveolar bone and deposition o

cementum

B. -ncreased interocclusal distanceC. 8ormation o dentine

Ans A

#"!". 4(y is t(e )re9uen*y o) *ar0o(y,rate inta-e more im&ortant t(an t(e

9uantity>

A. 5ow number o streptococcus mutans

B. )etero ormation is better at low sugar concentration

C. )omo ormation is better at high sugar inta#eD. Restricted diusion o acid through pla;ue

Ans D

#"3;. T(e (amular not*( is im&ortant in )ull ,enture *onstru*tion0e*ause it ai,s int(e settin+ &osition o) t(e arti)i*ial teet(

A. 8irst statement is true" but the reason given is alseB. Both statements are true

C. Both statements are untrue

Ans A

#"6". 4(en settin+ u& teet( )or *om&lete ,entures (a1in+ 0ilateral0alan*e,

o**lusion' se&aration o) &osterior teet( ,urin+ &rotrusion is ,one 0y>

A. -ncreasing the anterior posterior occlusal curve

B. Decreasing the angle orientation o the occlusal plane

Ans A


37/37

#"6#. 4(en &atient 0ites in &rotrusion %it( *om&lete ,entures you noti*e t(at t(e

&osterior teet( ,onot meet' %(at %oul, you ,o to sol1e t(is>

A. -ncrease the compensatory curve

B. Decrease the angle o the occlusal plane

Ans A

#"6!. T(e MOST *ommon reason )or )ull ,enture )ailure>

A. -nade;uate interocclusal clearance

#"6:. 4(at ,oes SYNERESIS in &rost(o,onti*s mean>

A. 5oss o water and contraction

#"67. 4(y %oul, you in1est t(e %a &attern as soon as &ossi0le in anin,ire*t inlay

)a0ri*ation>

A. 3inimise distortion

B. Avoid contractionC. Avoid e(pansion

Ans A

Date post:	02-Jun-2018
Category:	Documents
Upload:	chetanbansal
View:	244 times
Download:	0 times

C(Dental Caries, Conservative Dentistry, Dental Materials, Prosthodontics and Materials)

Documents