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NEETMDS- Endodontics mcq
MDS PREP

The mesiolingual root canal of the mandibular 1st molar is found under the 
1. Mesiolingual cusp
2. Mesiobuccal cusp
3. Central groove
4. Mesiolingual ridge

Endodontics Answer: 3

The following is a critical factor affecting success of a reimplantation of an avulsed tooth
1) Time lag between avulsion & treatment
2) Preserving tooth in dry state
3) Removing the ruptured periodontal fibres
4) Time period of stabilisation
Endodontics Answer: 1

Instrument of choice for biomechanical preparation in fine root canals of double curved canals 
 1. H file
 2. K-flex file
 3. Unifile
 4. Reamer
Endodontics Answer: 1

Working length of root canal is
1) 0.5 to 1mm short of radiographic apex
2) 1 to 2 mm short of apex
3) Exactly at apex
4) 1 to 2 mm apical to apex
Endodontics Answer: 1

The most common consequence of bleaching vital teeth
1) Discolouration
2) Cervicalresorption
3) Apical periodontitis
4) Root resorption
Endodontics Answer: 3

Barbed broach is used for 
 1. Extirpation of pulp
 2. Enlargement of canal
 3. Obturation of canals
 4. All of the above
Endodontics Answer: 1

Best time to obturate root canals 
 1. When canals are dry
 2. When tooth is asymptomatic
 3. When successive negative cultures are obtained
 4. All of the above
Endodontics Answer: 4

The first generation apex locators are
1) Resistance type
2) Impedance type
3) Frequency type
4) Combination of any one of the above
Endodontics Answer: 1

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