MDS PREP
Longest acting local anaesthetic is
1. Bupivacaine
2. Tetracaine
3. Lidocaine
4. Both A and B
Oral Surgery
Answer: 4
Longest acting local anaesthetic is Bupivacaine.
During the Gillies approach, the structure of anatomic significance is
1. Superficial temporal artery
2. Marginal mandibular nerve
3. Internal jugular vein
4. Inferior alveolar nerve
Oral Surgery
Answer: 1
The Gillies approach is a surgical technique used in facial reconstruction, particularly for the repair of facial defects. The superficial temporal artery is of significant anatomical importance during this procedure, as it supplies blood to the scalp and face. Surgeons must be cautious to avoid damaging this artery during the approach.
In peripheral nerve block, which of the following local anaesthetics has the longest duration of action?
1. Bupivacaine
2. Cocaine
3. Lignocaine
4. Prilocaine
In peripheral nerve block, the local anaesthetic with the longest duration of action is Bupivacaine.
To give field block the LA should be deposited near
1. Main trunk
2. Large branch of peripheral nerve
3. Small nerve endings
4. Periodontal ligament
Oral Surgery
Answer: 2
To give a field block, the LA should be deposited near a large branch of peripheral nerve.
Which of the following is not a theory for local anaesthetic action
1. Membrane expansion theory
2. Calcium displacement theory
3. Electrical potential theory
4. None of the above
Oral Surgery
Answer: 4
Which of the following is not a theory for local anaesthetic action: None of the above.
The role of sodium metabisulfite in local anaesthetic agent is
1. Preservative
2. Fungicide
3. Reducing agent
4. Vasoconstrictor
Oral Surgery
Answer: 2
The role of sodium metabisulfite in local anaesthetic agent is as a preservative.
One wants to anaesthetise the inferior alveolar nerve at the point at which it exits from the mandibular canal, so the injection site most often located in
1) Between first and second molars inferior to the root apices
2) Between first and second molar superior to root apices
3) Between first and second premolars inferior to root apices
4) Between first and second premolars superior to root apices
Oral Surgery
Answer: 3
The inferior alveolar nerve block (IANB) is a common technique used in dentistry to anesthetize the mandibular teeth, including the molars. The nerve exits the mandibular foramen and runs along the mandibular canal before it branches into the incisive and mental nerves. For effective anesthesia, the injection site is typically located between the first and second premolars, aiming towards the medial surface of the ramus of the mandible, and the needle is inserted until it is just inferior to the root apices of these teeth. This position allows the anesthetic solution to reach the nerve as it emerges from the bone and before it gives off its major branches, thus achieving profound anesthesia for the procedure.
A contraindication to local infiltration technique
1. Hypertension
2. Diabetic patient in whom urine sugar present
3. Infection in the arch
4. Kidney problems
Oral Surgery
Answer: 3
Local infiltration is a safe and effective technique for achieving anesthesia in
most situations. However, it is contraindicated in the presence of infection in
the arch because it can spread the infection further or lead to complications
like an abscess. Hypertension and kidney problems are not direct
contraindications to local anesthesia, but they may require careful monitoring
of the patient's condition. Diabetes with urine sugar present does not directly
contraindicate the use of local anesthetics unless there are severe
complications or neuropathy involved.