The document describes the technique for an inferior alveolar nerve block. The nerve block involves injecting local anesthetic near the inferior alveolar nerve trunk to anesthetize the entire mandibular quadrant. The technique involves using a syringe and needle to inject the anesthetic 3-5mm lateral to the pterygomandibular raphe, 20-25mm deep after contacting bone, then retracting slightly and injecting while withdrawing the needle to also anesthetize the lingual nerve.

1. Inferior Alveolar Nerve BlockInferior Alveolar Nerve Block
Technique for Local Anesthesia
For dental students
By
Ehtewish، H

2. 2
Local Anesthetics RolesLocal Anesthetics Roles
● Decrease intra-operative and postoperative
pain.
● Increase patients cooperation.

3. 3

4. 4

5. 5

6. 6
Local anesthetic instrumentsLocal anesthetic instruments
●
Anesthetic carpulesAnesthetic carpules
●
SyringeSyringe
●
NeedleNeedle

7. 7
Nerve blocks:Nerve blocks:
Local anesthetic deposited near main nerveLocal anesthetic deposited near main nerve
trunk andtrunk and
is usually distant from operative site.is usually distant from operative site.

8. 8
Technique :Technique :
Target:-Target:-
Entire mandibular quadrant and gingivaEntire mandibular quadrant and gingiva
(except buccal gingiva of molars).(except buccal gingiva of molars).

9. 9
TechniqueTechnique
● 1- Place thumb in coronoid notch and visualize line
extending from thumb back to the pterygomandibular
raphe (about 2/3 way up the finger nail).

10. 10
TechniqueTechnique

11. 11
TechniqueTechnique

12. 12
TechniqueTechnique
●
2- Replace thumb with mouth mirror or2- Replace thumb with mouth mirror or
retractorretractor to preventto prevent accidental injection.accidental injection.

13. 13
●
3- Hold needle3- Hold needle parallelparallel to occlusal planeto occlusal plane
with bevel away from bone and approachwith bevel away from bone and approach
from contralateral premolars.from contralateral premolars.
TechniqueTechnique

14. 14
TechniqueTechnique

15. 15
●
4- Insert needle ~1cm above occlusal plane4- Insert needle ~1cm above occlusal plane
3-5mm lateral of raphe Advance needle 20-3-5mm lateral of raphe Advance needle 20-
25mm (almost buried), must sound bone25mm (almost buried), must sound bone
then retract 1-2mm, aspirate, and inject.then retract 1-2mm, aspirate, and inject.
TechniqueTechnique

16. 16
TechniqueTechnique

17. 17
TechniqueTechnique
●
5- Deposit 3/4 carpules and inject 1/45- Deposit 3/4 carpules and inject 1/4
carpule while removing needle tocarpule while removing needle to
anesthetize lingual nerve.anesthetize lingual nerve.

18. 18
thank you for readingthank you for reading