MDS PREP
Lidocaine is an example of an
1. Acid
2. Amide
3. Ester
4. Aldehyde
Oral Surgery
Answer: 2
Lidocaine is an example of an amide.
One decided to use forceps for removal of a tooth. The first direction for the force to be applied is
1. Buccally
2. Lingually or palatally
3. Apically
4. Occlusally
Oral Surgery
Answer: 3
When using forceps for removal of a tooth, the first direction for the force to be applied is apically.
To perform tracheostomy entry should be made at the
1) Cricothyroid ligament
2) Thyroid membrane
3) Thyroid notch
4) Cricoid cartilage
Oral Surgery
Answer: 1
A tracheostomy is a surgical procedure that involves creating an opening in
the trachea (windpipe) to facilitate breathing. The preferred site for making
the incision during a tracheostomy is the cricothyroid ligament,
which is located between the cricoid and thyroid cartilages.
Cricothyroid ligament: This ligament is relatively
superficial and provides a safe access point to the airway, especially in
emergency situations. It is often chosen for emergency tracheostomy because
it is easier to locate and access quickly.
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.
Nerve membrane stabilization action of local anaesthetic agents is due to
1. Increasing conductance of potassium ions
2. Creating negative after potentials
3. Preventing conductance of Na ions from the exterior of the nerve to the intrior
4. None of the above
Oral Surgery
Answer: 3
Nerve membrane stabilization action of local anaesthetic agents is due to preventing conductance of Na ions from the exterior of the nerve to the interior.
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.
For a 8-year-old child with TMJ ankylosis, the treatment of choice is
1. Gap arthroplasty
2. Condylectomy
3. Gap arthroplasty with costochondral grafting
4. Treatment not required
Oral Surgery
Answer: 3
For an 8-year-old child with TMJ ankylosis, the treatment of choice is gap arthroplasty with costochondral grafting.
In the extraoral technique for mandibular nerve block the needle after contacting the pterygoid plate is directed
1. Anteriorly
2. Posteriorly
3. Superiorly
4. Inferiorly
Oral Surgery
Answer: 1
In the extraoral technique for mandibular nerve block, the needle is inserted
into the pterygomandibular space anterior to the lateral pterygoid plate and
directed anteriorly to avoid damaging the maxillary artery and other important
structures located posteriorly. The goal is to place the anesthetic solution
around the mandibular nerve before it enters the pterygopalatine fossa.