MDS PREP
Alpha adrenergic agonists are used in combination with local anaesthetics to
1) Increase the rate of liver metabolism of local anaesthetic
2) Increase the concentration of LA at receptor site
3) Both the above
4) None of the above
Oral Surgery
Answer: 2
Increase the rate of liver metabolism of local anesthetic: Alpha adrenergic agonists, such as epinephrine, are often added to local anesthetics to enhance their effectiveness. They achieve this by causing vasoconstriction at the injection site, which reduces bleeding and increases the duration of anesthesia. However, they do not directly increase the concentration of LA at the receptor site or alter liver metabolism. Therefore, the correct answer is 2) Increase the concentration of LA at receptor site.
Rapid onset of action seen by local anaesthesia in small nerve endings is due to
1. Increased threshold of small nerves due to depolarization
2. Low pH of small nerve fibres
3. High ratio of surface area to the volume of small nerve fibres
4. None of the above
Oral Surgery
Answer: 3
Rapid onset of action seen by local anaesthesia in small nerve endings is due to the high ratio of surface area to the volume of small nerve fibres.
Which surgical procedure is carried out to treat TMJ ankylosis?
1. Arthroplasty
2. Condylectomy
3. Discoplasty
4. Capsulorrhaphy
Oral Surgery
Answer: 1
The surgical procedure carried out to treat TMJ ankylosis is arthroplasty.
The first sensation to be lost following administration of local anaesthetic is
1. Proprioception
2. Pain
3. Touch
4. Temperature
Oral Surgery
Answer: 2
The first sensation to be lost following administration of local anaesthetic is pain.
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.
According to gate control theory of pain, large fiber impulses tend to
1. Bypass the central control process
2. Inhibit the effect of painful stimuli transmitted by small fibers
3. Both the above
4. None of the above
Oral Surgery
Answer: 2
According to gate control theory of pain, large fiber impulses tend to inhibit the effect of painful stimuli transmitted by small fibers.
A patient is allergic to PABA. Most probably he will also be allergic to
1. Lignocaine
2. Carbocaine
3. Prilocaine
4. Tetracaine
Oral Surgery
Answer: 4
A patient allergic to PABA will most probably also be allergic to Tetracaine.
The sterilising units should be monitored at which of the following intervals
1. Daily
2. Weekly
3. Biweekly
4. Monthly
Oral Surgery
Answer: 2
Sterilizing units should be monitored weekly to ensure proper function and
efficacy in killing bacteria and other microbes. This is done through
biological, chemical, and physical indicators.