Mid-term Qs 2009

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Jordan University of science and technology

Faculty of Dentistry

2009

Midterm

Questions( Oral Pathology, Research, Conservative, Dental

Material, Prosthodontics and Epidemiology)

Written by: Batch of 2009

Collected by : Majd Hidmi

Designed by: Sanaa Qasem

Price :

0.40 JD
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Midterm Exams Questions: 2009

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ORAL PATHOLOGY 1

Q1 : the abnoramality which Radicular Cyst is accociated with is :A. dilaceration

B. taurodontism

C. dense invaginatus

D. concrescence

ans >> C.

Q2 : pulp obturation are associated with:ans : dentinogenesis imperfecta and dentin dysplasia type 2

Q3 : Neoplastic transformation is more likely to be seen in association with:a- Odontogenic keratocyst

b- Glandular odontogenic cyst

c- Dentigerous cyst

d- Radicular cyste- Lateral periodontal cyst

Ans: c

Q4 : lymphangioma macroglossia is a :Ans : secondary (tumors)

Q5 : tappered tooth structure is inAns :amelogenesis imperfecta hypoplastic smooth patteren

Q6 : what the diseas that becuses keratin k4 o k13 ?ans : white sponge nevus .

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Q7 : Which tooth is affected in cellulitis ?A- first molar

B- first premolarC- 2nd premolar

D- canine

answear is A

Research Methods

(written by : Ali Wattad)

Q1 : if the probability that the association could have occured by chanceis 0.02?

answer: null hypothesis is rejected and alternative hypothesis is

accepted.

Q2 : an intervention works in research setting?answer: efficacy .

Q3 : not included in the criterion of the research?a> chose a question that it answer is not frustrated.

B> a research that is puplished quickly.

C> a question that has an impact on health.

d> prior experience(...)

answer : a or b (not sure)

Q4 : a process tending to produce results that depart systemically frm thetrue values is?

answer: bias.
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Q5 : applying the research results on a sample of patients being studied iscalled?

answer: internal validity.

Q6 : when the investigator and the subject know nothing about groupassignment, this is called?

answer: double blinded.

Q7 : In randomized studies, efficacy and effectiveness are the sametrue or false?

false.

Q8 : which is not true about randomized study:a>can eliminate confounding and bias.

B>more generalizability

C> slower to conduct.

D>cannot answer a broad range of questions.

answer is: B

Q9 dr.ashraf shawesh is doing a research about (oral tori !!) and he istaking patients wherever he can find them. this is called?

answer: grab sample.

Q10 : a researcher is doing a research about prevelance of caries ingovernmental schools, he invited only 200 student from private school,

this is called?

answer: selection bias.

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CONSERVATIVE 1

Q1 : the angle between the pulpal floor and the axial walll called ....Ans : pulpoaxial line angle

Q2 : removal of any remaining infected dentin is included in which stageor step ..... Ans : final tooth preparation stage

Q3 : the lathe cut amalgum need.... condensing .. and in need ...mercury>>>>> answer .. more , more

Q4 : which of the following factors that affect cavity preparation relatedto selection of restorative material >>

Ans : two of them are .. patients age ..thickness of enamel and dentin ..

Q5 : Increment applied of amalgam in the cavity by thickness of ... to doeffective condensation

A. 3.0 mm

B. 2.0

C. 1.0

D. 1.5

I put it >>> C.

Q6 : there is a question about high copper amalgam compared to theconventional amalgam which statement is wrong

Answer >>

High copper amalgam have inferior resistance to discoloration corrosion

,break down .creep compared to conventional amalgam

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Q7 : according to black's classification of cavities Class 1 cavity is :A. including occlusal pit and fissure of the posterior teeth

B. including palatal and buccal extension\or buccal and palatal pits C. ..D. .

the answer >> A and B

Q8 : MOD is Considered a class 2 cavity , MO is Considered a complexcavity

A. two statement are false

B. two statement are true

C. first statement is true , the second is falseD. first statement is false , the second is true

answer >> C.

Q9 : which is true about restorative material factors that affect toothpreparation :

A. the thickness of enamel and dentin

B. age of the patient

C. ability of isolating operating field

D. the extension of the caries

Answer is >> C and D

Q10 : which is true about primary resistance form of tooth preparation:A. the shape of the conventional preparation that resist displacement or

removal of the restoration from tipping or lifting forces

B. Keep the cavity as small as possible

C. Rounded well-defined internal line angle

D. depend on the restorative material

Answer >>> B. and C.

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Q11 : the correct position of the wedge in Class 1 cavity :A. placed in the wider embrasure

B. in the lingual embrasureC. in the buccal embrasure

D. Class 1 cavity does not need wedge

answer >> D.

Q12 : which one of these is not a hand cutting instrument :A. Gingival Marginal trimmer

B. Amalgam condenser

C. Spoon excavatorD.Enamel Hatchet

Answer >> B.

Q13 : Most popular matrix band:Ans : Type 1

Q14 : Best amalgan depth _____ and preffered depth ____ to avoidfractures

ans : 1.5 & 2

Q15 : Which is incorrect about amlgamAns : overmixed amalgam is dry & crumbly

Q16 : Removing carious dentine is part of:ans : Final preparations stage

Q17 : if the distance between two lesions is less than .5 they SHOULDNOT be joined T/F

False

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Q18 : which statement is true about Low speed hand piece :A. speed up to 100,000 rpm

B. rotation only clockwiseC. can used to remove enamel

D. used to finish the restoration

Answer >> D.

Dental Material 2

Q1 : Zinc phosphate consist of:

ans : zinc oxide +phosphoric acid

Q2 : The acid that control working time & setting time in GIC is :

ans : Tataric acid

Q3 : The activator in composite polymerization is:

ans : tertiary amine

Q4 :The initiator in composite polymerization is:

ans : benzoyl peroxide

Q5 : Increase filler --> decrease Coefficient of thermal expansion

Q6 : what do we add amalgam to prevent tarnish ??

ans : (palladium)

Q7 : Tarnish happened when amalgam contact with

A. sulfide

B. chloride

C.hydrogen

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D.water

E. two answers are correct

answer >> E.

Q8 : The bond agent between Risen matrix and fillers in composite is :

ans : saline coupling agent

Q9 : Which monomer doesn't found in resin matrix in composite

A.MMA

B. bis-GMA

C. UDMAD .polystyrene not sure about spelling "

ans : D

Q10 : in Hardening stage in GIC what happened :

ans : Alaminum salt bridges coss-linked polyacrylic acid chain ..

Q11 : when we increase itching time on dentin what will happened :

A. pulp death !!

B. tooth sensitivity

C. increase composite bonding to the tooth

D.collagen fiber collapse

Q12 : The acid which control\ affect the setting and working time in GIC :

A. phosphoric acid

B. acrylic acid

c. Tartaric acid

D. .....

answer >> C.

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Q13 : to decrease corrosion in amalgam we add

A.silver

B.copperC.tin

D.palladium

B. is the correct !!

Q14: which of the following is true regarding zinc oxide ogeynol using

cement

1) oil of orange is used as a solvent

2) Equal length base & catalyst>>

two of the above (this is the answer)

Q15 : cermet GIC have more abrasion resistance? (or something like that)

True.

Q16 : after applied bonding agent a Hybrid Layer will form and it's

A

b . ..

c . layer made up intermingling resin and itched enamel

D. layer made of intermingling resin and itched dentin

answer: D.

((backing to slide " bonding and adhesive" slide 20 .. " hardcopy"))

Q17 : all are true about pits and fissure sealants except?

A. release floride

B. brittle

C. good adhesion

D.good penetration into fissures

E. all are true

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answer>>> D

Q18 : what acid reacts with zinc oxide to make zinc phosphate?(something like that).

A.polyacrylic acid

b. tartaric acid

c.hydrofloric acid

d. phosphoric acid

e: all are true

answer>>> D ,

Q19 : the smear layer consist of all of these except :

a. bacteria

b. dentin debris

c. salivary components

D. primer solution

answer D.

Q20 : which is not correct about High strength bases ..

the answer was > have low elastic modulus !!

Q21 : ideally amalgam should do one of this:

a. expand to reduce micro leakage

b. a little dimensional change

c. shrink........

d. none is correct

Answer is B

Q22 : something about composers wich is wrong???

a. release less fluoride than GIC

b. high fracture toughness...

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c. no acid base reaction in it

d. ......

E. all are trueans >>> c

Q23 : what will affect good bonding

A. oil lubricant expelled from the hand piece

B. moist surface after itching and bonding

C. All answer are true

D. increasing bonding time ka2no

E . complete drying of enamel and dentineAnswer A , E

Q24 : what interferes with good bonding?

A. oil lubricant

B. moist surface of dentine

c. ......

d. .....

e. all are true

Answer : A

Q :25 when silver alloy react with mercury,the weakest phase will be :

Answer : gamma 2 phase.

Q:26: which is true about admixed amalgam compared to spherical

amalgam:

A. admixed amalgam has higher 1&24 hours strengthB. admixed amalgam shrink moreC. required to be condensed more than spherical(something like that)

answer >> c

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Q27 : Which is correct about surgical dressing :

A) flowable

B) bulkyC) smooth

D) contains Eugenol

the answer is C , (( slide : 24 dental cements ))

Q28 : What is the strongest phase in the amlagam setting :

(a) Gamma

(b) gamma 1

(c) gamma 2(d) none

Ans : a

Q29 : The compound that bonds filler to matrix in composite --->

copper

(The rest of questions written by : Mutaz Al-Hanouty )

1. Which is the weakest phase of sliver alloy mixed with mercury (i.e.Amalgam) :

Answer is Gamma 2

2. Which metal reacts with copper will produce the weakest phase (i.e.Gamma 2) :

Answer is Tin

3. Amalgam corrosion may be reduced by adding which of the following :Answer is copper

4. Which of the following is true of admixed amalgam compared withspherical amalgam :
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Answer is it requires the use of small condensers

5. Which of the following properties characterize amalgam :Answer is poor tensile strength

6. Set amalgam should have which of the following :Answer is little dimensional changes

7. Which of the following is true :Answer is used ultrasonic condensers is not recommended to amalgam

8. Compared to high copper amalgam , low copper amalgam is which of thefollowing : ( 2 answers are correct )

Answer: a. Have lower strength after 1 hour of placement

b. Accompanied by reduced micro-leakage

9. Amalgam tarnish may caused by amalgam contact with which of thefollowing : ( 2 answers are correct )

Answer: a. Chlorides

b. Sulfides

10.The following monomers is used for organic matrix except :

Answer is polystirine (what is this, the doctor dose not know :D )

11.Which of the following bonds filler and resin matrix :

Answer is silane

12.The activator is chemically cured composite is :

Answer is tertiary amide

13.Which of the following is correct regarding composite proprieties :Answer is they have similar thermal conductivity to tooth structure

14.The following is true except :

Answer is high filler content increase the CTE of composite

15.Which of the following is true about light cured composite :

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Answer is an example of high intensity light curing unit is argon laser unit

16.Compomers are : ( 2 answers are correct )

Answer : a. They release less fluoride compared to conventional GIC

b. Can be used in the same clinical situations as micro-filled

composites

17.Composites : ( 2 answers are correct )

Answer : a. May be user for constructing temporary crowns

b. They shrinks less compared to acrylic material

18.Which of the following is true of composite proprieties :

Answer is higher filler content increase stiffness

19.Sliver cements (i.e. metal reinforced GIC ) are :

Answer is have better abrasion resistance compared with conventional

GIC

20.conventional GIC used for the following clinical situations except : ( 2

answers are true )

Answer a. proximal tooth surface cavity in posterior teeth (i.e. class II)

b. occlusal lesions in permanent teeth

21.How is the setting reaction in GIC :

Answer is formation of aluminum bridges that cross-linked the polyacid

22.Which of the following is a propriety of conventional GIC : ( 2 answers are

correct )

Answer a. Low tensile strength

b. similar CTE to tooth structure

23.Which of the following regulates working time and setting time :

Answer is tartaric acid

24.Which of the following is false of GIC :

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Answer is they suffer from low initial fluoride release

25.Which of the following is false regarding GIC pits and fissure sealants :

Answer is The ability to fully penetrate pits and fissures

26.Compared to conventional GIC hybrid GIC characterized by the following

except :

Answer is No acid-base reaction

Removable Prosthodontics 1

Q1 - List Lab/Clinic denture making steps

Q2 - Which of the following muscles does not affect the denturemovement

(later ptyregoid)

Q3 : Metal tray (picture) is used for which of the followingmaterials

Margins of the Retromylohyoid fossa

Q4 : Hight for Incisors in Maxilla/mandible: Q5 : Picture: how far back should you go on the retromolar pad

(2/3 back

Q6 : picture: cast was made of gypsum type two & tray line wasblue line
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Q7 : Foxs plane is used where:

Q8 : Describe: Wax rim adjustments:

Q9 : List Stages of cold cure acrylic setting & which stage is itmanipulated in

Q10 : pic of metal tray , which impression material we can usewith this : impression compound , alginal , zone, hydrocolloids

Ans. pression compound

Assay Questions :1. list in order the laboratory steps for complete denture

fabrication ?

2. describe all the steps for maxillary wax rim adjustment

done during jaw relationship records :

3. list in order the clinical steps for complete denture

fabrication:4. a- list in order the laboratory steps of setting when self -

cure acrylic powder and liquid are mixed :

b- which stage is the crroect stage to manipulate and shape

the mix ?

5. list the limiting structures (anatomical borders) of the "

retromylohyoid fossa " :

Oral Epidemiology

(Written by 2008 Class)
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Mid-term Qs 2009

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