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NEETMDS- Oral Surgery mcq
MDS PREP
The colour of a nitrous oxide cyinder is
1) Red
2) Blue
3) White
4) Black
Oral Surgery Answer: 2

Which of the following procedures can be used to treat an oroantral fistula resulting from posterior surgery 
 1. Buccal mucoperiosteal flap
 2. Palatal mucoperiosteal flap
 3. Bridge flap
 4. Palatal island flap
Oral Surgery Answer: 2

Extraction of distoangular impaction of mandibular 3rd molar can cause
1) Slippage in lingual pouch
2) # of ramus of mandible
3) Excessive haemorrhage
4) Dry socket
Oral Surgery Answer: 2

Surgical needle & sutures are usually sterlized in manufacturing units by 
 1. Gamma radiation
 2. X-rays
 3. Boiling
 4. Dry heat sterilization
Oral Surgery Answer: 1

Which of the following symptoms is seen in a patient administered with 20-40 % nitrous oxide
1) Paraesthesia
2) Floating sensation
3) Sweating
4) None of the above
Oral Surgery Answer: 2

When the mandible is fractured in the canine region, both on the right and left sides, the fractured segment is displaced posteriorly by the pull of the
1. masseter, medial pterygoid and mylohycid muscles
2. buccinator, mylohyoid and genioglossus muscles
3. geniohyoid, thyroglossus and mentalis muscles
4. geniohyoid, genioglossus and anterior belly of digastric muscles
Oral Surgery Answer: 4

During extraction of lower impacted right molar, bone is removed
1) To expose maximum dimension of tooth
2) Upto CE junction
3) Upto furaction area
4) Upto half of roots
Oral Surgery Answer: 1

Open reduction and internal fixation of fracture fragments in the older patients is risky because 
 1. Of their old age, they less likely tolerate the major procedure under general anaesthesia
 2. Fixation is difficult because bone will become more dense as age advances
 3. Both of the above are correct
 4. None of the above are correct
Oral Surgery Answer: 4

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