Mandibular Local Anesthesia Injections - Adult

Question 1

In the IA, what structures are anesthetized?

Answer 1

• lower lip
• pulps of teeth in the quadrant
• buccal periodontium from central incisor to 2nd PM

Question 2

In the IA, what is the injection site and anatomical landmark?

Answer 2

• 2/3 to 3/4 the distance from coronoid notch to pterygomandibular fold (raphe) - next to fold
• 6-10 mm above occlusal plane

AL: mandibular foramen

Question 3

In the IA, what is the path of the needle? Do you contact bone?

Answer 3

opposite1st or 2nd PM and parallel to occlusal plane; yes bone is contacted

Question 4

In the IA, what amount is deposited?

Answer 4

1/2 cart for IA and lingual

Question 5

In the IA, what is the length of the needle?

Answer 5

long

Question 6

In the Ling, what structures are anesthetized?

Answer 6

• lingual periodontium of the quadrant
• anterior 2/3 of the tongue
• floor of the mouth

Question 7

In the Ling, what is the injection site and anatomical landmark?

Answer 7

same as IA

AL: none

Question 8

In the Ling, what is the path of the needle?

Answer 8

same as IA

Question 9

In the Ling, what amount is deposited?

Answer 9

1/8 cart (0.2-0.3 mL)

Question 10

In the Ling, what length needle is used?

Answer 10

long

Question 11

In the B, what structures are anesthetized?

Answer 11

buccal periodontium of molars

Question 12

In the B, what is the injection site and anatomical landmark?

Answer 12

buccal mucosa distal and buccal to most distal molar

AL: none

Question 13

In the B, what is the path of the needle?

Answer 13

parallel to the occlusal plane

Question 14

In the B, what is the depth of insertion? Do you contact bone?

Answer 14

about 2 mm

contact bone is likely but not required

Question 15

In the B, what amount is deposited?

Answer 15

1/8 cart (0.3 mL)

Question 16

In the B, what length needle is used?

Answer 16

long

Question 17

In the I, what structures are anesthetized?

Answer 17

• lower lip
• pulps and facial periodontium of teeth from mental foramen to the midline

Question 18

In the I, what is the injection site and anatomical landmark?

Answer 18

near muccobuccal fold btwn mand 1st and 2nd PM

AL: mental foramen

Question 19

In the I, what is the path of the needle?

Answer 19

parallel to the long axis of the PMs

Question 20

In the I, what is the depth of insertion? Do you contact bone?

Answer 20

about 5 mm

contact bone: no

Question 21

What are special considerations during the I?

Answer 21

after injection, apply pressure for 2 min

Question 22

In the I, what amount is deposited?

Answer 22

1/3 to 1/2 cart (0.6-0.9 mL)

Question 23

In the I, what length of needle is used?

Answer 23

short

Question 24

In the SP, what structures are anesthetized?

Answer 24

pulps facial (or lingual) periodontium of tooth anesthetized

Question 25

In the SP, what is the injection site and anatomical landmark?

Answer 25

near muccobuccal fold of tooth anesthetized

AL: none

Question 26

In the SP, what is the path of the needle?

Answer 26

parallel to the long axis of the tooth, when possible

Question 27

In the SP, what is the depth of insertion? Do you contact bone?

Answer 27

just beyond the apex about 3-5 mm (varies)

contact bone: no

Question 28

In the SP, what amount is depostied?

Answer 28

1/3 cart

Question 29

In the SP, what length needle is used?

Answer 29

short