Local Anaesthetic

Question 0

Lignocaine Special

Chemical? Concentration?
Vasoconstrictor? Concentration?
Onset?
Duration?
Clinical Notes?
Calculations?

Answer 0

Lignocaine Hydrochloride 2%
Adrenaline 1:80000
Onset = 1-4mins
Duration = 1-2.5hrs for infil, 3-4hrs for major nerve block
Contains metabisulphides, therefore, beware of patients who are asthmatic or allergic to sulphides. Also it is amide type, beware of patients allergic to amides.

Question 1

Topical

Active Ingredient?
Mins to act?
Lasts?

Answer 1

A water soluble topical anaesthetic.
Consist of 50g lignocaine base (amide type)
Action takes 3-5mins to occur.
Lasts 15-20mins.

Question 2

Scandonest

Chemical? Concentration?
Onset?
Duration?
Max dose?
Vasoconstrictor? 
Types in clinic?

Answer 2

Mepivacaine
Onset is 3-5mins
Duration is 20-60mins pulpal, 160-180 soft tissue.
Max dose in children 6-14 = 1.35mL, do not exceed 2.7. And 1.8mL for 3-6yrs old.
2 types in clinic. Blue band = mepivacaine hydrochloride 3%
bronze band = mepivacaine hydrochloride 2% with levonordefrin

Question 3

Oraquix

What is it used for?
Chemicals?
How to inject?
Onset and duration?

Answer 3

Is a eutectic mixture that changes from liquid (at rt) to a gel (at body temp) and cannot be washed away with water. It is used for deep debridement/scaling or periodontal probing.
It contains 2.5% lignocaine and 2.5% Prilocaine.
Intrasulcular injection
More effect than topical and less than LA
Onset = 30sec, duration = 10-20mins
Max 5cRtridges.