MDS PREP
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.
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.
To luxate a tooth with a forceps the movements should be
1. Firm and deliberate primarily to the facial surface with secondary movements to the lingual surface
2. Sharp and definite so periodontal ligament tears easily
3. Figure of "eight" motion
4. None of the above
Oral Surgery
Answer: 1
To luxate a tooth with forceps, the movements should be firm and deliberate primarily to the facial surface with secondary movements to the lingual surface.
The onset of action of lidocaine is
1. 1-2 minutes
2. 5-10 minutes
3. 3-5 minutes
4. 7-8 minutes
Oral Surgery
Answer: 3
The onset of action of lidocaine is 3-5 minutes.
One wants to anaesthetise the inferior alveolar nerve at the point at which it exits from the mandibular canal, so the injection site most often located in
1. Between first and second molars inferior to the root apices
2. Between first and second molar superior to root apices
3. Between first and second premolars inferior to root apices
4. Between first and second premolars superior to root apices
Oral Surgery
Answer: 3
The inferior alveolar nerve exits the mandibular foramen and runs in the
mandibular canal before it branches off to supply the teeth, including the
second premolar. To anesthetize the nerve at this point, the injection site is
commonly located between the first and second premolars, inferior to the root
apices, where the nerve is relatively superficial and accessible.
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.
All of the following statements of nasal fractures are true except
1) Even if minor, they may be followed by bilateral ecchymosis and facial oedema
2) They may need to be reduced for a few weeks
3) They need not be complicated by traumatic telecanthus
4) They may lead to the telescoping of the nasal complex into the frontal sinus
Oral Surgery
Answer: 2
Nasal fractures, even minor ones, can lead to bruising (ecchymosis) and
swelling (edema) around the nose and face due to the vascularity of the area.
Most nasal fractures, especially minor ones, do not require reduction
(surgical realignment) unless there is significant displacement or functional
impairment. Typically, if reduction is necessary, it is done shortly after the
injury, not for a few weeks.
Traumatic telecanthus (increased distance between the inner canthi of the
eyes) can occur with severe nasal injuries, but it is not a necessary
complication of all nasal fractures.
Severe nasal fractures can lead to complications such as the telescoping of
the nasal complex, which may involve displacement into adjacent structures,
including the frontal sinus.
Of the following conditions where acrylic splints are advisable during the postoperative phase of management
1) Torus palatinus reduction
2) Mental tubercle reduction
3) Mandibular alveoplasty
4) None of the above
Oral Surgery
Answer: 1
Torus palatinus reduction involves removing a bony prominence from the palate. Acrylic splints provide stabilization, protect the surgical site, and prevent hematoma formation. Other conditions like mandibular alveoplasty do not require splints for similar reasons.