MDS PREP
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.
Maximum recommended dosage of lignocaine with 1:1,00,000 adrenaline subcutaneously is
1. 100 mg
2. 30 mg
3. 500 mg
4. 700 mg
Maximum recommended dosage of lignocaine with 1:1,00,000 adrenaline subcutaneously is 100 mg.
Each cartridge contains how many ml of anaesthetic solution
1. 0.9 mL
2. 1.2 mL
3. 1.8 mL
4. 2.2 mL
Oral Surgery
Answer: 3
Each cartridge contains 1.8 mL of anaesthetic solution.
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.
Depressed fracture of the zygomatic area may be clinically recognised by
1. Concavity of the overlying tissue in the zygomatic arch area
2. Interference with movements of the mandible
3. Subluxation of condyles
4. Both A and B
Oral Surgery
Answer: 4
Concavity of the overlying tissue in the zygomatic arch area: This indicates a loss of structural integrity due to the fracture.Interference with movements of the mandible: The zygomatic bone plays a role in the overall facial structure and function, and a fracture can affect jaw movement.Both of these signs are indicative of a depressed fracture in this region.
The prime purpose of bibevel chisel is
1. Split teeth
2. Sharpen the angles
3. Remove bone
4. Engage point establishment
Oral Surgery
Answer: 1
The prime purpose of bibevel chisel is to split teeth.
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.
In children jaw fractures are normally immobilized for
1. 3 months
2. 6-8 weeks
3. 3-4 weeks
4. 5-10 days
Oral Surgery
Answer: 3
In children, the healing process for fractures is faster due to the high vascularity and rapid bone turnover in growing tissues. Mandibular fractures in children are typically immobilized for a shorter duration compared to adults, as prolonged immobilization can interfere with the growth of the jaw. Immobilization for 3-4 weeks is generally sufficient to allow proper healing without compromising growth.