Inferior Alveolar Nerve Block

Question 1

what does an IANB give anaesthesia to?

Answer 1

mandibular teeth on one side (via IAN), lower lip and chin on one side (mental nerve), part of the tongue and lingual gingival tissue on one side (lingual nerve)

Question 2

what is the buccal gingivae anaesthetised by?

Answer 2

long buccal / buccal infiltration

Question 3

where does the non-dominant thumb go when injecting

Answer 3

coronoid notch

Question 4

where is the non-dominant index or middle finger placed when injecting

Answer 4

extra-orally at the posterior border of the ramus

Question 5

where does the needle advance from?

Answer 5

the premolar region of the opposite side with syringe parallel to mandibular occlusal plane

Question 6

where is the needle inserted

Answer 6

through mucosa in mandibular retro-molar region lateral to pterygomandibular raphe

Question 7

how far from the occlusal plane is the needle inserted

Answer 7

about 6-10mm from mandibular occlusal plane

Question 8

what are the oral landmarks for IDB

Answer 8

coronoid notch of mandibular ramus, posterior border of mandible, pterygomandibular raphe, lower premolar of opposite side

Question 9

how deep do you advance the needle

Answer 9

until the medial border of the mandible is reached

Question 10

what do you do once you touch the bone

Answer 10

the needle is withdrawn slightly until it is supra-periosteal, then aspirate and deposit 1.5ml of solution

Question 11

how is the lingual nerve blocked?

Answer 11

by withdrawing the needle about 10mm (1cm), aspirating again and deposit remaining solution