MDS PREP
Mental foramen opening is directed in
1. Forward and medial direction
2. Backward and medial direction
3. Forward and lateral direction
4. Backward and lateral direction
Oral Surgery
Answer: 4
The mental foramen is found on the buccal aspect of the mandible, typically
between the first and second premolars or the second premolar and the first
molar. The opening of the mental foramen is directed backward and lateral,
allowing the mental nerve to exit and innervate the lower lip and chin.
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.
Dislocation is treated by forcing the mandible
1. Upwards and backward
2. Upwards and forwards
3. Downwards and forwards
4. Downwards and backwards
Oral Surgery
Answer: 4
Dislocation is treated by forcing the mandible downwards and backwards.
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.
After the surgical removal of chronically infected teeth in a controlled diabetic patient, which of the following is of utmost importance
1) Postoperative check of patient for bleeding
2) Revaluation of insulin dosage being taken by the patient
3) Both the above
4) None of the above
Oral Surgery
Answer: 2
Diabetes affects wound healing and immune response. After surgery, stress and altered eating patterns can impact blood glucose levels. Monitoring and adjusting the insulin dosage as necessary is critical to prevent complications such as infection or delayed healing. Postoperative bleeding is important but secondary to glycemic control in diabetics.
The first sensation to be lost following administration of local anaesthetic is
1. Proprioception
2. Pain
3. Touch
4. Temperature
Oral Surgery
Answer: 2
The first sensation to be lost following administration of local anaesthetic is pain.
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.
Bell’s palsy is associated with
1. inflammation of the maxillary sinus
2. muscles of mastication
3. arthritis of the temporomandibular joint
4. facial nerve
Oral Surgery
Answer: 4
Bell's palsy is a form of temporary facial paralysis or weakness on one side of the face resulting from damage or trapping of the facial nerve (cranial nerve VII), which is the nerve that controls the muscles of facial expression.