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i dont know if its the same with the one that already on the group!!! coz i didnt check

them yet:))i hope that it will be helpfull for all of us:)

Dental Material (2) Questions:

Q1: True OR False: During the first half hour of amalgam setting reaction expansionoccur at the mercury setting through the mercury particles.

False. Because when mercury enter amalgam the material size decrease so it shrink

(contraction) not expandQ2: True OR False: The amount of amalgam mercury needed to be mix with temporal

.make it decrease by additional indium to the .

True.

Q3: True OR False: lower... amalgam has high coper

False. Amalgam has hyper .Q4: True or False: Tin added to amalgam decrease the corrosion.

False. Copper & Zinc Not TinQ5: True OR False: physical or other particles required to more mercury to be mix.

False. Regular particle not physical

Q6; All of the following true except:

1) Amalgam clamp may be done under water2) Dental clinch should not be curved.

3) Lower is recommended to minimize amalgam dangers

4) Ultrasonic dental are recommended (this is false, because it release heat so it causeproblems)

Q7: Plastic deformation is called:

Creep

Q8: Properties that characterize amalgam is3 times to option of thermal expansion of teeth.

Q9: which of the following elements is use in mercury

Galliun.Q10: True or False: Over mixed amalgam it characterize by longer setting time

False, it short setting time

Q10.5: To reduce the formation admixed shape? Tin.

Q11: all of the following factors are important to obtain appropriate mix amalgam

1- Set

2- Time

3- Manufacture information4- Type of the mix ( this is the answer)

Q12: Which of the following is true

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1- Macrofilled composite is high abrasion resistant

2- Composite bound higher to dentine. (false ,it is higher compared to enamel)3- Smart Composite is called so due to its ability to bind chemically to tooth structure.

4- Additional filers decrease polymerization shrinkage (this is the answer)

Q12.5: The following is true about polymerization shrinkage composite.

1- Decreasing by quick or rabid curing. (false, curing unit, slow curving to ? shrinkage)5- When pormolaization shrink in composite it decrease by quick & rapid curing. (false,

increase not decrease)

6- Pormolaization shrinkage is minimal in composite is recommended 2 ml. (false, 2ml orless)

7- Pormolaization reduce by using luydiomin unit sliming under lament composite (this is

true)Q13: The following material may be used for cavity of indirect restoration except:

Compomers because it is too weak

Q14: which of the following is used in composite1) Bis-GMA

2) UDMA3) 2 of the above (this is the answer)

Guys this is a bonus Q because there is something wrong

Q15: composite bound to tooth structure using carrent bounding system except:

1) Achieved by acid itching bounding by agent application2) Small affected when enamel / dentine are completely dry (False, dentine should be

moisture slightly)

3) Enhanced by formation of hypred layer.4) Required the removal of dentine layer

Q16: which of the following component act as initiator of polymerization?

Benzoyl peroxide

Q17: which of the following False:1) A thin surface layer is present due to... and impression

2) .. indicated used is used in deep preparation

3) Depth of cure is effected by shape of composite( this is false)Q18: Direct restorative material required extra oral is contraction. False

Q19: which of the following setting reaction that you fell

Acute pain reactionQ20: which of the following is true

1) Initial ratio of class ionomer cross linking with element

2) Initial generation of GIC is due to reaction with aluminum.

3) Preparing for applying GIC to tooth surface is clean with hydrophobic acid(false,polyacrlyic acid)

4) Glass ionomer bound to enamel through ionic bounding (True)

Q21: all of the following are true except

1) Glass monomer has an initiate alkaline ph (False, Acidic)2) Using liner GIC in deep cavity is recommended

3) Using lamnation technique use GIC base under amalgam (False)

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4) Low tensile, strength glass ionomer brittle.

Q22: Semantic is cure modified by adding resinFalse

Q23; composite GIC may be used in all of following situations except:1) Cervical abrasion

2) Several root carries

3) Crown preparation4) Prectimal cavity in class 2 (false, because it is 2 weak)

Q24: which of the following materials may be finished & polish immediately

Composite & resin modifiedQ25: which of the following properties enhanced by adding metal particles:

Arrangement

Q26: which of the following is true regarding modified glass ionomer

1) Setting reaction is first initiated by light

2) Unlighted composite is not shrinkage (false, it shrink because it has resin)3)

Guys, this is also bonus QQ27: which of the following material has thermal expansion properties similar to tooth

structure

GIC

Q27.5: True or False: Complomer need more florid that prevention GICFalse

Q28: Cementeric typical resin is used as:

1) Nutrient agent2) Temporary restorative material (this is the answer)

3) ..

Q29: which of the following cements are common used over pulp exposure and indirect

pulp capping:Calcium hydroxide

Q30: which of the following element has the lowest solubility

Sorry, the voice is not clear? I can't hear anythingQ31: which of the following is true regarding zinc oxide ogeynol using cement

1) ..orange is used as a solvent

2) Equal length base & catalyst3) 2 of the above (this is the answer)

Q32: Demineralization of enamel around cemntum autonomic bound cement zinc

phosphate is minimize when GIC are used

True.Q33: which of the following material has anesthetic effect

Zinc oxide eugenol.

Q34: high strength bases:

1)2) Mixed to putty

4) All of the above are true (this is the answer)

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Q35: Which cement exhibited an exothermic reaction during mixing?

Zinc phosphate

Q36: adhesive to tooth structure

1) May be affected by choliva & blood

2) Enhanced by (false)

3) Defect in properties of adhesive agentQ37: the following are true regarding acid itching except:

1) It is done to dentin... and enamel

2) Permanent teeth required (false)3) We should reapit it in enamel content if it is contaminated.

4) .

Q38: which of the following is true:1) Dentine bounding may be termites due to hydrophobic nature of dentine.(False,

hydrophilic Not hydrophobic)

2) The tooth itching referred to itching enamel for 8-16 seconds

3) It is first & second generation using bounding agent

4) polmer are 5th generation trimmer that congrain enamel itching (false)5) 2 of the above (this is the answer)

Q38: which of the following false regarding the fraction of porcelain:

1) Itching for phosphoric acid (false. Hypocloric acid)

2) Tang lasting.3) Electro platetting agent.

4) Application reefing agent.

Q39: The following are true regarding current use .except:1) Chemically bound to composite resin

2) Maintain hydrophobic move to spread on dentin.

3) When applied they should be thin during age (false)

4) Complomer are considered to be modification for GIC (false)5) 2 of the above (this is the answer)

Q40: The following is correct regarding composite shape selection

1) It should be under slide2) May be affected by color or... of patient

3) Required co-operation between dentists

4) It should be done after (false)Q41: which of the following is true regarding amalgam bounding to cavity preparation:

1) Only dentin to be itched (false)

2) Amalgam should be condense after bounding resin is completely cure (false).

3) Bonding resin is should be depth cure (this is the answer)