MDS PREP
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.
The amount of vasoconstrictor in 1 mL of 2 % lignocaine solution with 1:2,00,000 adrenaline is
1. 0.5 mg
2. 0.05 mg
3. 0.005 mg
4. 0.0005 mg
Oral Surgery
Answer: 3
The amount of vasoconstrictor in 1 mL of 2 % lignocaine solution with 1:2,00,000 adrenaline is 0.005 mg.
Among the following items in the past medical history, which would most affect the choice of local anaesthetic agent?
1. RHD
2. Hyperthyroidism
3. Adrenal insufficiency
4. Asthma
Oral Surgery
Answer: 2
Adrenal insufficiency would most affect the choice of local anaesthetic agent.
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.
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.
Eburnation is seen in
1) Malunion
2) Nonunion
3) Osteomyelitis
4) Osteoradionecrosis
Oral Surgery
Answer: 2
Eburnation is the process of converting living bone tissue into a sclerotic, or hardened, avascular bone due to lack of blood supply. This can occur at the site of a nonunion, which is where a fracture fails to heal properly, and the bone ends remain separate.
Myelinated nerve fibres have all of the following properties except
1. Conduction is slower in myelinated than in non-myelinated fibres
2. Current discharges at nodes of Ranvier
3. Outer layer is of lipids
4. None of the above
Oral Surgery
Answer: 1
Myelinated nerve fibres have all of the following properties except conduction is slower in myelinated than in non-myelinated fibres.
Inferior alveolar nerve block is given in
1. Retromolar area
2. Pterygomandibular space
3. Submandibular space
4. Submental space
Oral Surgery
Answer: 2
Inferior alveolar nerve block is given in the pterygomandibular space.