MDS PREP
The following areas are anaesthetized by the anterior palatine nerve block
1. Part of the upper lip, lateral surface of nose and lower eyelid
2. Posterior portion of hard palate and overlying tissues upto the first premolar
3. Incisors canine and first premolar
4. Both hard and sort palates completely
Oral Surgery
Answer: 2
The anterior palatine nerve block anaesthetizes the posterior portion of the
hard palate and the overlying tissues up to the first premolar. It does not
typically anaesthetize the upper lip, lateral surface of the nose, or lower
eyelid, which are innervated by different branches of the trigeminal nerve.
Which of the following is preferred local anaesthetic technique for haemophilics
1. Nerve block
2. Supraperiosteal
3. Intraligamentary
4. Field block
Oral Surgery
Answer: 3
Intraligamentary anaesthesia is the preferred local anaesthetic technique for haemophilics.
Members of the sterile professional team include
1. Surgeon, assistants and scrub nurse
2. Surgeon, scrub nurse, and circulating nurse
3. Both A and B
4. None of the above
Oral Surgery
Answer: 1
Members of the sterile professional team include the surgeon, scrub nurse, and
circulating nurse. The scrub nurse assists the surgeon with passing instruments,
while the circulating nurse manages the flow of materials and equipment into and
out of the sterile field.
Most commonly used local anaesthesia
1. 1: 20,000 xylocaine HCL
2. 1: 50,000 xylocaine HCL
3. 1: 10,000 xylocaine HCL
4. 1: 80,000 xylocaine HCL
Oral Surgery
Answer: 4
Most commonly used local anaesthesia is 1: 80,000 xylocaine HCL.
The direction of the bevel of the chisel during bone cutting is
1. Away from the bone to be sacrificed
2. Towards the bone to be sacrificed
3. Independent of the bone to be sacrificed
4. Parallel to stress lines
Oral Surgery
Answer: 2
The direction of the bevel of the chisel during bone cutting is towards the bone to be sacrificed.
The following factors play a role and cause variations in susceptibility of sensory nerve fibers to local anaesthesia
1. Diameter of the nerve fiber
2. Distance between nodes of Ranvier
3. Length of nerve fiber
4. All of the above
Oral Surgery
Answer: 4
The following factors play a role and cause variations in susceptibility of sensory nerve fibers to local anaesthesia: diameter of the nerve fiber, distance between nodes of Ranvier, and length of nerve fiber.
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.
A patient is allergic to PABA. Most probably he will also be allergic to
1. Lignocaine
2. Carbocaine
3. Prilocaine
4. Tetracaine
Oral Surgery
Answer: 4
A patient allergic to PABA will most probably also be allergic to Tetracaine.