MDS PREP
Of the following which is most suitable anaesthesia for the extraction of a deciduous molar
1. Inferior alveolar nerve block
2. Surface anaesthesia
3. Local infiltration
4. None of the above
Oral Surgery
Answer: 1
The most suitable anaesthesia for the extraction of a deciduous molar is inferior alveolar nerve block.
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.
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.
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.
The Caldwell-Luc operation is performed on the
1. maxillary sinus
2. temporal space
3. frontal sinus
4. pharynx
Oral Surgery
Answer: 1
Caldwell-Luc Operation
The Caldwell-Luc operation is a surgical procedure
performed to access the maxillary sinus. It is often used to treat chronic
sinusitis or to remove cyst s or tumors from the maxillary sinus. The
procedure involves creating an opening in the canine fossa to allow drainage
and access to the sinus cavity. The other options listed do not pertain to
this specific surgical intervention.
Diplopia is most common with
1. Mandibular fracture
2. Craniofacial dysjunction
3. Nasal fractures
4. Zygomatico maxillary complex
Oral Surgery
Answer: 4
Diplopia, or double vision, can occur due to various types of facial fractures, particularly those involving the zygomaticomaxillary complex (ZMC). Fractures in this area can lead to muscle entrapment or damage to the extraocular muscles, resulting in misalignment of the eyes and subsequent diplopia. The ZMC is a critical area for the stability of the orbit and the surrounding structures, making it a common site for such complications.
Compbell line is seen in
1. Transpharyngeal view
2. Transorbital view
3. Occipitomental view
4. Towne view
Oral Surgery Answer: 3
The Campbell line is an important anatomical reference line
used in radiology, particularly in the context of the occipitomental
view (also known as the Water's view). This line is drawn from the
outer canthus of the eye to the midpoint of the maxillary sinus and is used to
assess the position of the maxillary sinuses and other related structures in the
skull.
Occipitomental view: This view is commonly used in
maxillofacial imaging to visualize the maxillary sinuses, orbits, and nasal
cavity. The Campbell line helps in evaluating the relationship of these
structures.
Transpharyngeal view: This view is used to visualize the
pharynx
Transorbital view: This view focuses on the orbits and
surrounding structures
Towne view: This view is used to visualize the occipital
bone and the base of the skull
A contraindication to local infiltration technique
1. Hypertension
2. Diabetic patient in whom urine sugar present
3. Infection in the arch
4. Kidney problems
Oral Surgery
Answer: 3
Local infiltration is a safe and effective technique for achieving anesthesia in
most situations. However, it is contraindicated in the presence of infection in
the arch because it can spread the infection further or lead to complications
like an abscess. Hypertension and kidney problems are not direct
contraindications to local anesthesia, but they may require careful monitoring
of the patient's condition. Diabetes with urine sugar present does not directly
contraindicate the use of local anesthetics unless there are severe
complications or neuropathy involved.