Last Ye Surgery Ques

7/31/2019 Last Ye Surgery Ques

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This is last year mid term exam questions..hope it helps..

Ramadhan kareem~

Q1 :

Which of the following is correct regarding the sultatory conduction inphysiology :A : the nerve signal jump from one node of ronvier to another .

Q2 :Electric potential of a typical nerve is :

Is not 70 becoz it's -70 mv ..So the correct answer is : it's caused by the action of Na-K ATPase which move

Na extracellulary & K intracellulary .

Q3 :

Which of the following correct regarding Action potential ?

The correct answer is : all of choices are wrong .

Q4 :

Which of the following describe the mechanism of action of LA agents ?A : - they may prevent the generation of action potential ( recall infiltration

technique )

- they may prevent the propagation of action potential ( recall blockinjection )

- they interfere with ion channels & prevent the exchange of Na .so all are correct.

Q5 :

Which of the following is/are not necessarily present in LA cartridge :- fungiside- vasoconstrictor- reducing agentso B +C +D >> the only one which is necessarily to be present in LA cartridgeis LA agent .

Q6 :

Which of the following is / are correct regarding the procaine :

- it's a amide based >>> wrong- it's currently commonly used >>> wrong


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- it's less likely to cause toxicity & allergies >> wrong- it's molecules include hydrophilic but not hydrophobic >> wrong- so all choices are wrong .Q7 :

Changing the hydrophilic / hydrophobic ratio may result to all of thefollowing Except :A :The Exception ( the correct answer is the mechanism of action ) it's not

affected but the duration , potency , duration etc does .

Q8 :

Intrinsic potency of LA agent is measured by :A : The minimum Conc the reduce the potential to it's half amplitude within

5 minutes ..

Q9 :

The larger the diameter of the nerve to be anesthetized , the slower

will be the onset of the LA ?A : TRUE

Q10 :which of the following have the longer duration of action ?

A : bupivacaine >> it remain for 8-10 Hours >> recall postoperative analgesia .

Q11 :

The effects of VC in LA solution include all of the followingExcept :A : it may decrease the total amount of LA thats needed to a surgical

procuders >> becoz it increase the potency & duration .

Q 12 :

Which of the following are correct regarding the LA cartridge :

A : it contain 1.8-2.2 ml ( & it's important to know how much it contain in ordernot to exceed the maximum safe dose )

Note : the rubber bung is the one that pushed by a plunger & the diaphragm ison the other side toward the needle .

Q13 :

Which of flowing is correct about infiltration technique :

- LA prevent the generation of the Action potential . correct- It's rarely fails . correct >>> so A & C are correct .


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Q14 :

Which of following are correct regarding regional block technique :A : the anesthetic agent is deposited at a distant from a target area .

Note : injection at the main trunk of a nerve not the terminal branches .

Q15 :

if you apply LA in the buccal sulcus opposite to the upper second molar all of

the following will be anesthetized except:A : palatal mucosa of the upper teeth .

It anesthetize the buccal mucose , PDL , PULP & the bone .

Q16 :

Buccal cortical plate of the maxilla is :A : thin & porous .

Q17 :In order to do a restoration on the upper 6 which nerves we need to

anesthetize ?

A : the middle & posterior superior alveolar nerves ..Noting to do with the greater palatine nerve ..

Q18:How many palatal injections we need to extract painlessly the upper 4 , 6 ,

7 & 8 ??A: two injections >>> greater palatine & incisive nerves >> recall the overlap inthe first premolar area >>

Although I return to our lec & the doc said the same Q & the answer wasonly one injection ( I'm sure from this information in the lec becoz I heard itcarefully

But now ??!! why ?? I dont know >>>

so the students who answered two injections they will have one extra mark &if you selected one injection ( As me ) you loooooooooose one mark .

Q19 :

Which of the following may reduce the pain from a LA injection :

A : - diameter of the needle- slow injection


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- topical anesthesia .

so the length of the needle is not important in reducing the pain .

Q20 :

How many nerves supply the soft tissue , PDL , bone , buccal gingiva & palatalgingival of the upper 6 ?A : 3 nerves . we already know them

Q21 :What will happen if you insert the needle more posterior in buccal mucosa

opposite to the third molar area :A; - hematoma &

- increase the chance of intravenous injection

recall in this area we have a pterygoid plexus

Q22 :

How many nerves we need to block in order to anesthetize the palatal mucosaof whole maxillary teeth ?

A : three nerves >>> incisive nerve & two greater palatine nerves ) .

Q23 :

The thickest part in the palatal mucosa is located :

A : midway between the midline & the free gingival margin , by the way thisinformation was repeated in the lec more than three times .

Q24 :How many nerves we need to anesthetize in order to guarantee painless

manipulation on the palatal gingival of the upper 4 ?A : two nerves >> the greater palatine & incisive . recall overlap .

Q25 :

How many nerves we need to anesthetize in order to manipulate on thepalatal gingival of the maxillary incisors ?

A: we block only the incisive nerve .Q26 :

Which of the following is correct regarding the LA in the mandible :

A : - it's easier than in the maxilla >> wrong- we usually need a long needle >> correct

- infiltration technique in the incisor area >> correct

- block injection are used posteriorly >> correct


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Q27 :

Which of the following will not be anesthetized by ID block ?A : - mandibular canine on the same side

- the skin of the lip on the same side- buccal mucosa of the lower 4 on the same sideSo all choices are wrong >> all of the above will be anesthetized ..

Q28 :Which of the following will not be anesthetized by a lingual nerve block

injection ?A : the posterior one third of the tongue" one the same side "( recall the

glossopharyngeal nerve )

Q29 :

If you need to excise a superficial lesion on the labial mucosa of the lower lip

( on the right side ) , which of the following may give adequate anesthesia ?A : - right ID block

- right mental block

- infiltration around the lesion .all of them are correct , the doc here didn't ask us about the best technique

. so be careful .

Q30 :

When giving a right ID block for right-handed dentist , the dentist shouldstand :A: in front of the patient.

Q31 :Which of the fllowing is correct about the entry point of the needle whenyou give ID block ?

A : - lateral to the pterygomandibular raphe .

Q32 :When you give ID block the syringe should come from the opposite molar

area ?

A : FALSE >> from the opposite premolar area .

Q33 :

When you give a ID block , the syringe will be injected in the ptergopalatinespace ?


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A : FALSE >> ptergomandibular space .

Q34 :

the lingual nerve usually anesthetized with the same injection with ID block :A: TRUE .

Q35 :What may happen if the needle pass too far posteriorly behind the mandible ?A : failure of the LA ..

Not permanent paralysis . >> BUT temporary paralysis

Not uncontrolled bleeding .Q36 :

Bilateral ID blocks are absolutely contraindicated ?A : FALSE , we said previously that we will not kill the pt but we try to avoid

that

Q37 :If you need to manipulate on the lower right lateral incisor , which of the

following may give adequate anesthesia ?

- infiltration .- right ID block- right mental blockall of them will Sufficientlyanesthetize the target area here >>the same idea in Q 29 .. above

Q38 :When you treat a deciduous second molar for a 5 year old child , then the ID

block is indicated ?

A : TRUE

Q39 :If you need to excise a lesion that present on the buccal mucosa opposite to

second molar then you need to block the long buccal nerve ?

A : TRUE .Q40 :

Noradrenaline is more safer than adrenaline ?A : FALSE >> it's not safer , that's why we don's use it anymore

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