MDS PREP
Among the following, which condition is a containdictation to the use of local anaesthetic agent?
1. Parkinson"s disease
2. Liver damage
3. Pregnancy
4. Hypersensitivity to the drug
Oral Surgery
Answer: 4
Hypersensitivity to the drug is a contraindication to the use of local anaesthetic agent.
The following anatomical landmarks are useful in the closed mouth approach of mandubular nerve block except
1. Occlusal plane of occluding teeth
2. Anterior border of ramus
3. Mucogingival junction of the mandibular teeth
4. A & B
Oral Surgery
Answer: 3
The closed mouth approach of mandibular nerve block relies on the anatomical
landmarks of the occlusal plane of occluding teeth and the anterior border of
the ramus. The mucogingival junction is not a relevant landmark for this
technique.
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.
The tips of anatomic forceps should be placed
1. On the crown portion
2. At the junction of clinical and anatomical crowns
3. Near junction of apical and middle thirds of clinical crown
4. On the root surface as far apically as possible
Oral Surgery
Answer: 4
The tips of anatomic forceps should be placed on the root surface as far apically as possible.
A patient is on periodic renal dialysis. Minor oral surgery should be performed
1. One day before dialysis
2. On the day of dialysis
3. One day after dialysis
4. One week after dialysis
Oral Surgery
Answer: 3
Minor oral surgery should be performed one day after dialysis in a patient who
is on periodic renal dialysis. This is because the patient's platelet count and
coagulation factors are usually at their lowest before dialysis, which could
increase the risk of bleeding.
A high level fracture that extends across the orbits through the base of the nose and the ethmoid bone to the zygomatic arches is termed
1. Le Fort I fracture
2. horizontal fracture
3. pyramidal fracture
4. Le Fort Ill fracture
Oral Surgery
Answer: 4
Le Fort III fractures are characterized by a fracture pattern that involves the separation of the facial skeleton from the cranial base. This type of fracture typically extends across the orbits and involves the zygomatic arches, leading to significant facial disfigurement and potential complications.
How many mg of 2% lidocaine present in the cartidge?
1. 36 mg
2. 18 mg
3. 180 mg
4. 360 mg
Oral Surgery
Answer: 1
How many mg of 2% lidocaine present in the cartridge is 36 mg.
When comparing to the non-myelinated nerve, myelinated nerve requires
1. Higher concentration of anaesthetic agent
2. Lower concentration of anaesthetic agent
3. Same concentration of anaesthetic agent
4. None of the above because no correlation
Oral Surgery
Answer: 1
When comparing to the non-myelinated nerve, myelinated nerve requires a higher concentration of anaesthetic agent.