Dental Anaesthetic Procedures Flashcards
Local anaesthesia is defined as..
- loss of sensation
- in a circumscribed area of the body
- caused by depression of excitation in nerve endings
- or an inhibition of the conduction process in peripheral nerves
- reversibly
(Just understand)
What are the 4 methods of LA administration?
- Topical
- Infiltration
- Regional nerve block
- Intra-ligamentary injection
Role of LA (list)
- Decrease intraoperative & postoperative pain
- Decrease amt of general anaesthetics used in the operating theatre
- Increase px cooperation
- Diagnostic testing/examination
What are the 3 branches of the trigeminal nerve?
V1: opthalmic
V2: maxillary (all sensory)
V3: mandibular (sensory & motor)
*think maxilla cannot move but mandibular can move
How do you check that IDN block has worked?
Check the lip
Significance of the pterygomandibular space and its relations.
[T/F] IDN is a sensory nerve
false
- is a mixed nerve
Why is Articaine preferred in paeds?
- kids have very porous bone
- articaine has better bone penetration
- good for infiltration
Bupivacaine is preferred for
- post-operative care
- issa a long acting amide LA
Amide LAs are metabolised in..
Liver
Mepivacaine cannot be used in
Pregnant women
- ask for lidocaine instead
- mepivacaine is class C
We dont rlly use ester LAs in clinics anymore cuz..
Allergic rxns
What are the 3 main purposes of vasoconstrictors given w LA
- Prolong length of action & increase depth of action of LA
- Reduce toxicity of LA
- Haemostatic effect (reduces bleeding)
(If there is bleeding, first thing to do is inject vasoconstrictor in the area)
^ need to know for MCQs!
What does 1:50,000 relate to
Aka 1g/50,000ml
= 1000mg/50,000ml
= 0.02mg/ml
What does % mean in maximum doses LA
% means g/dL
1%=1g/dL
1%=10g/L
1%=10mg/mL
Thus, 2%=20mg/mL
