MDS PREP
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.
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.
Walshama"s forceps are used to
1) Remove teeth
2) Remove root
3) Clamp blood vessels
4) Reduce nasal bone fractures
Oral Surgery
Answer: 4
Walsham's forceps are a surgical instrument commonly used in maxillofacial surgery. They are designed to reduce and manipulate small, fine bony structures, such as the nasal bones in the case of nasal fractures.
Each of the following statements about local is correct except
1. Lignocaine causes cardiac dysrhythmias
2. Prilocaine is more toxic than lignocaine
3. Bupivacaine is given for obstetrci epitural anaesthesia
4. Both A and B
Each of the following statements about local anaesthesia is correct except: Prilocaine is more toxic than lignocaine.
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.
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.
Which is most frequently performed to correct a skeletal mandibular retrognathia
1) "C" type osteotomy
2) Horizontal osteotomy of the ramus
3) Oblique subcondylar
4) Sagittal split osteotomy of the ramus
Oral Surgery
Answer: 4
Skeletal mandibular retrognathia, characterized by a backward positioning of the mandible relative to the maxilla, is commonly corrected using a sagittal split osteotomy (SSO) of the ramus. This surgical procedure involves making a cut in the ramus of the mandible, allowing the surgeon to reposition the mandible forward. The SSO is favored because it provides good access, allows for significant advancement of the mandible, and has a relatively low complication rate. Other options, such as "C" type osteotomy or horizontal osteotomy of the ramus, are less commonly performed for this specific condition.
Which of the following local anaesthetics is a vasoconstrictor
1. Lidocaine
2. Procaine
3. Bupivacaine
4. Ropivacaine
Oral Surgery
Answer: 4
Ropivacaine is a vasoconstrictor.