MDS PREP
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.
Number 16 cowhorn forceps are specially designed to extract
1. Maxillary first and second premolars
2. Mandibular central incisors
3. Mandibular molars
4. Maxillary molars
Oral Surgery
Answer: 3
Number 16 cowhorn forceps are specially designed to extract mandibular molars.
Which of the following local anaesthetics is a vasoconstrictor
1. Lidocaine
2. Procaine
3. Bupivacaine
4. Ropivacaine
Oral Surgery
Answer: 4
Ropivacaine is a vasoconstrictor.
The elevators that employ both the lever and wedge principles during extraction of root tip are
1. Pott"s elevators and apex elevators
2. Apex elevators and straight elevator
3. Straight elevators and Pott"s elevators
4. Pott"s elevators and Cryer elevators
Oral Surgery
Answer: 2
The elevators that employ both the lever and wedge principles during extraction of root tip are apex elevators and straight elevator.
If efforts in cardiopulmonary resuscitation are effective there will be
1) Constriction of pupils
2) Dilatation of pupils
3) Hypertension immediate
4) None of the above
Oral Surgery
Answer: 1
Effective cardiopulmonary resuscitation (CPR) can lead to improved cerebral
perfusion and oxygenation, which may result in constriction of the pupils (miosis)
as the body begins to recover from the state of shock.
The longest acting, most potent and most toxic LA is
1) Lidocaine
2) Dibucaine
3) Bupivacaine
4) Tetracaine
Oral Surgery
Answer: 2
Dibucaine (cinchocaine) is a highly potent and long-acting local anesthetic with high toxicity. It is often used in topical applications but is avoided for systemic use due to its high risk of adverse effects compared to alternatives like bupivacaine.
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.
The following is least toxic of all local anaesthetics
1. Tetracaine
2. Mepivacaine
3. Prilocaine
4. 2-Chloroprocaine
Oral Surgery
Answer: 4
The following is least toxic of all local anaesthetics: 2-Chloroprocaine.