Which of the following regarding cleaning and shaping of the canal is false 1) Shaping of canal is done after cleaning the apical 1/3rd to ensure patency 2) Shaping facilitates placement of instruments to the working length by increasing the coronal taper 3) Shaping permits more accurate assessment of the apical cross-sectional diameter of the canal 4) None of the above
EndodonticsAnswer: 1
The prognosis of the broken instrument in root canal is good when 1) Instrument is less than 20 No. 2) Instrument is lodged in the bone beyond the apical area 3) Instrument obliterates apical third of the canal 4) Instrument is in middle
EndodonticsAnswer: 3
In a vital rooth if root canal treatment is to be performed, then 1. Root canal filling should be 0.5-1 mm short of the radiographic apex and filling to the same length 2. Root canal filling should be up to the radiographic apex 3. Root canal filling 0.5-1 mm beyond the radiographic apex 4. Root canal filling 0.5-1 mm short of the radiographic apex
EndodonticsAnswer: 1
In periapical surgery, which of the following flap designs limits access to the operative site and often heals with scar formation 1. Envelope 2. Rectangular 3. Triangular 4. None of the above
EndodonticsAnswer: 1
Final preparation of endodontic cavity in mandibular molar 1) Towards lingually 2) Should be straight occlusually 3) Towards mesially 4) Towards distally
EndodonticsAnswer: 3
Recapitulation 1. Uses large files to the flare the root cananl 2. Removing debris with a smaller instrument than the instrument that goes to the apex 3. Use of large files to flare the root canal but in between use of small instrument to confirm the initial length 4. All of the above
EndodonticsAnswer: 3
Draining abscess by cutting a window in the bone is 1. Hilton"s method 2. Trephination 3. Marsupialisation 4. Odontectomy
EndodonticsAnswer: 2
The totoal sterilization time at 15 psi and 121 degree celcius is 1) 20 min 2) 10 min 3) 3 min 4) 30 sec
