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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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