PSA

Question 1

What is the bony land mark for the PSA block?

Answer 1

Lower infratemporal surface of the maxilla.

Question 2

What is the soft tissue landmark (site of injection) for the PSA?

Answer 2

Height of the mucobuccal fold over the second molar

Question 3

What is the orientation for the PSA?

Answer 3

45-degree angle directed superiorly, medially and slightly posteriorly (one movement)

Question 4

What is the needle depth for a PSA?

Answer 4

10-15mm

short needle 25mm

Question 5

How much LA is deposited for PSA?

Answer 5

1-1.5ml ½ and ¾ of cartridge.

Deposited slowly over 30-60 secs

Question 6

What is the target nerve for the PSA?

Answer 6

Posterior superior alveolar nerve

Question 7

What structures become anaesthetised with a PSA?

Answer 7

Pulp tissue, alveolar bone. connective tissue, periodontal ligament, and buccal gingiva of 1st, 2nd and 3rd molar except for the MB cusp of the 1st molar

Question 8

How many planes do you aspirate in for a PSA?

Answer 8

2 planes