LA in OS Flashcards
1
Q
How can we minimise pain during LA?
A
Topical
Taught mucosa
Sharp needle
Slow injection - decreases the pressure of the liquid under the mucosa
Needle not against the bone
2
Q
Is lidocaine/articaine a vasodilator or constrictor?
A
Vasodilator - blocks action pot on sympathetic nerves
3
Q
How does adrenaline work?
A
Vasoconstrictor - peripheral a1 receptors
Increase cardiac output - cardiac b1 receptors (tachycardia and palpitations)
4
Q
How long should haemostasis take?
A
4-10 mins
5
Q
How long does lidocaine take to wear off?
A
2-3 hours
6
Q
How long does articaine take to wear off?
A
1-2 hours
7
Q
How much adrenaline does lidocaine have?
A
2% lidocaine
1:80000 adrenaline
8
Q
How much adrenaline does articaine have?
A
4% articaine
1:20000 adrenaline
