MDS PREP
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 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.
Among the following which is advantage of sagittal split osteotomy over transoral vertical subcondylar osteotomy
1) Greater mandibular movement is achieved
2) Because it is intraoral procedure. No external scar is produced
3) Alone may be used to correct a mandibular retrognathism and prognathism
4) Less chance of injuring the inferior dental canal
Oral Surgery
Answer: 3
Among the given choices, the advantage of a sagittal split osteotomy over a transoral vertical subcondylar osteotomy is that it allows for greater mandibular movement. The sagittal split osteotomy is a surgical technique used in orthognathic surgery to reposition the mandible in cases of severe skeletal discrepancies. It involves splitting the mandible along the midline and moving the two halves apart, which can provide significant advancement or setback of the lower jaw. This technique may be used to correct both mandibular prognathism and retrognathism, making it a versatile option in orthognathic surgery. Additionally, it is associated with fewer complications compared to the transoral vertical subcondylar osteotomy, which involves cutting through the medullary bone of the condyle and can pose a higher risk of injury to the facial nerve and other vital structures. However, it's important to note that the choice of surgical approach is determined by the specific case and the individual patient's needs.
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.
Subjective symptom of buccal nerve block is
1. Numbness and tingling sensation of the buccal mucosa
2. Numbness of the lingual mucosa near molars
3. No subjective symptoms
4. A & B
Oral Surgery
Answer: 3
While the buccal nerve block is used to anesthetize the buccal mucosa and buccal
gingival tissues of the maxillary molars, the actual technique does not
typically produce any specific subjective symptoms in the patient other than the
sensation of the needle. The patient may feel numbness if the anesthetic
solution is inadvertently placed in the oral mucosa or if the block is done
improperly.
Under general anaesthesia patient needs oropharyngeal
1. Lap pad
2. 4 * 4 gauge
3. Ferguson mouth gag
4. Pick up forceps
Oral Surgery
Answer: 2
Under general anaesthesia, a patient needs a 4 * 4 gauge.
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.
Frequently which of the following constitutes is amide type local anaesthesia causes allergic reaction
1. Lignocaine hydrochloride
2. Methyl paraben
3. Adrenaline
4. Contaminants in the solution
Oral Surgery
Answer: 2
Methyl paraben frequently causes allergic reactions in amide type local anaesthesia.