Equipment And Techniques

Question 1

For which type of injection is the short needle (25mm, 30 gauge) used?

Answer 1

Infiltrations

Question 2

How are safety plus syringes made safe for dismantling and disposal?

Answer 2

Double clicking to lock the sheath.

Question 3

What does aspiration help to prevent?

Answer 3

Intravascular injection

Question 4

What can cause false negatives during aspiration?

Answer 4

Needle blockage

Not using enough pressure (thinner needles)

Question 5

How are conventional needles re-sheathed?

Answer 5

Using a jenker

Question 6

What is the most effective combination of drugs to be used in a topical preparation?

Answer 6

Lidocaine and prilocaine

Question 7

What is the main advantage of having a patient supine when administering infiltrations?

Answer 7

They won’t faint and the will not see the needle being prepared.

Question 8

How far should you retract the needle after touching bone when delivering an infiltration?

Answer 8

1mm

Question 9

What is the ideal rate of injection?

Answer 9

1ml/min

Question 10

What procedures can be carried out with only buccal/labial infiltration?

Answer 10

Simple restorations

Question 11

Which two muscles are attached to the pterygopalatine raphe?

Answer 11

Buccinator and superior pharyngeal constrictor

Question 12

How far should the needle be retracted when bone is touched during an inferior alveolar nerve block?

Answer 12

1cm

Question 13

What is the key sign looked for to show that an alveolar nerve block has worked?

Answer 13

A numb lower lip

Question 14

Where would you inject when performing a mental nerve block?

Answer 14

In the attached gingivae below the contact of 4 and 5.

Question 15

Where would you inject when performing an intraligamentary injection?

Answer 15

Down the PDL between the tooth and the bone.

Question 16

Give an advantage and a disadvantage of intraligamentary injection.

Answer 16

Adv:
- low dose
- rapid onset
- little soft tissue anaesthesia
Disadv:
- bacteraemia
- PDL damage
- post-injection pain
- variable duration

Question 17

What does intra-papillary anaesthesia allow?

Answer 17

Comfortable palatal anaesthesia.

Question 18

What system of syringe is used in DDHS?

Answer 18

Safety plus