LA EXAM

Question 1

what seating position would you be in for upper right posterior teeth?

Answer 1

9 o’clock patient facing away from you

Question 2

what seating position would you be in for upper left posterior teeth?

Answer 2

9 o’clock patient facing towards you

Question 3

what seating position would you be in for upper anteriors?

Answer 3

7 oclock

Question 4

what seating position would you be in for lower anteriors?

Answer 4

11 o’clock

Question 5

what is the nerve you are numbing up for upper anteriors 13-23?

Answer 5

Anterior superior alveolar nerve

Question 6

what nerve are you numbing for upper right pre molars 14-15?

Answer 6

middle superior alveolar nerve

Question 7

what nerve are you numbing for upper right molars 16-18?

Answer 7

posterior superior alveolar nerve

Question 8

what nerve are you numbing up for upper left pre molars 24-25?

Answer 8

middle superior alveolar nerve

Question 9

what nerve are you numbing up for upper left molars 26-28?

Answer 9

posterior superior alveolar nerve

Question 10

what nerve are you numbing up for lower anteriors 33-43?

Answer 10

incisive nerve

Question 11

how would you know if you have injected a blood vessel?

Answer 11

after applying light pressure the syringe self aspirates and blood would appear in the syringe

Question 12

where does the bevel need to be on the needle (the wee black arrow)?

Answer 12

bevel to bone (facing the bone)

Question 13

how does the syringe self aspirate?

Answer 13

by applying light pressure

Question 14

what does Analgesia mean?

Answer 14

loss of pain sensation

Question 15

what does Anesthesia mean?

Answer 15

complete loss of sensation

Question 16

LA vs GA?

Answer 16

better for people with complexed medical histories
safe
cheaper
easy
unlimited time

Question 17

what are the uses of LA?

Answer 17

elimination of pain
Inferior dental block
infiltration analgesia

Question 18

what are elimination of pain procedures?

Answer 18

extractions
scaling
cavity prep
root prep

Question 19

what are the requirements of LA?

Answer 19

Non toxic, no damage to other organs

Capable of producing anesthesia without permanent damage

quick acting

Question 20

what information is supplied on the LA cylinder?

Answer 20

Concentrations of anaesthetic and vasoconstrictor
Expiry date
Manufacturers name
Batch number

Question 21

what are the 6 contents of a cartridge?

Answer 21

LA agent - anaesthetic agent

Vasoconstrictor- raises blood pressure eg adrenaline

Salt solution -hydrochloric acid stops nerve impulse

Reducing agent -prevents the vasoconstrictor combining with oxygen.

Fungicide-non toxic and gives good shelf life.

Buffers-to control acidity

Question 22

what are the 2 vasoconstrictors in the UK?

Answer 22

Epinephrine - Adrenaline

Felypressin - Octapressin

Question 23

trade name of prilocaine

Answer 23

citanest

Question 24

trade name of lidocaine

Answer 24

lignospan

Question 25

Xylonor Gel what is this

Answer 25

Contains Lidocaine 5% and Cetrimide 0.15%

Can be used in adults , children and adolescents from 4+
Used as a topical anaesthetic gel in dentistry

Recommended dosage of 0.1 to 0.5g with a cotton wool roll (0.1 is about 2mm of gel)

Massaged onto previously dried mucosa. Removal of excess saliva minimises dilution of the gel.

Question 26

what are complications of LA?

Answer 26

Failure to obtain L.A.
Pain during or after injection.
Haematoma formation.
Intravascular injection.
Broken needle.
Prolonged anaesthesia.
Infection.
Facial paralysis.
Soft tissue damage.
Trismus.
Visual disturbance.
Blanching.

Question 27

how would you dispose of your LA in the correct sharps?

Answer 27

pull the cover up and you will hear 2 clicks that locks the LA
pull the white handle off which goes into the orange clinical waste bag unless the cartridge comes out it goes into the blue box.
then the rest can go into the blue sharps bin.

Question 28

what can’t fellypressin be used on?

Answer 28

pregnant woman