MDS PREP
A fracture resulting from the destruction of bone by local or systemic disease is termed
1. greenstick fracture
2. impacted fracture
3. complicated fracture
4. pathological fracture
Oral Surgery
Answer: 4
A pathological fracture occurs when a bone breaks in an area weakened by disease, such as cancer, osteoporosis, or infection. Unlike traumatic fractures, which result from an external force, pathological fractures occur due to underlying conditions that compromise the structural integrity of the bone.
Of the following which tooth is most difficult to anaesthetize by infiltration technique alone
1. Maxillary canine
2. Macillary central incisors
3. Maxillary first molar
4. Maxillary first premolar
Oral Surgery
Answer: 3
Of the following, the maxillary first molar is the most difficult to anaesthetize by infiltration technique alone.
Each cartridge contains how many ml of anaesthetic solution
1. 0.9 mL
2. 1.2 mL
3. 1.8 mL
4. 2.2 mL
Oral Surgery
Answer: 3
Each cartridge contains 1.8 mL of anaesthetic solution.
A patient who is a grand mal epileptic requires emergency extraction. One should
1. Advise the patient that procedure requires admission to the hospital
2. Proceed with extraction using xylocaine without adrenaline
3. Proceed with extraction if anticonvulsive medication is employed by patient
4. None of the above
Oral Surgery
Answer: 3
In a grand mal epileptic patient requiring emergency extraction, it is essential
to proceed with caution and ensure that the patient is on a stable
anticonvulsive medication regimen. The patient should be monitored closely and
have immediate access to medical support in case of a seizure during the
procedure.
The amount of rate of distraction in osteogenesis distraction surgeries
1) 1mm/day
2) 2.5 mm/day
3) 5 mm/day
4) 10 mm/day
Oral Surgery
Answer: 1
The rate of distraction in osteogenesis distraction surgeries is typically 1 mm/day, allowing for gradual bone formation.
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
Alpha adrenergic agonists are used in combination with local anaesthetics to increase the concentration of LA at receptor site.
Sensitivity to local anaesthetics is greater in
1. Type B fibres
2. Type C fibres
3. Type A delta fibres
4. Fibres supplying the muscle spindles
Oral Surgery
Answer: 2
Type C fibers, which are unmyelinated and smaller in diameter, are more sensitive to local anesthetics compared to other types of nerve fibers.
The addition of hyaluronidase to a local anaesthetic solution might
1) Increase the duration of anaesthesia
2) Limit the area of anaesthesia
3) Reduce bleeding
4) Enhance diffusion of local anaesthetic
Oral Surgery
Answer: 4
Hyaluronidase is an enzyme that breaks down hyaluronic acid, a component found in the extracellular matrix. When added to a local anesthetic, it increases the permeability of tissues, facilitating enhanced diffusion of the anesthetic agent into the surrounding areas. This can broaden the spread of the anesthetic, allowing for a more effective and comprehensive blockade of nerve signaling.