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
Irrigation of root canals is caried 1. During opening of access cavity 2. During biomechanical preparation 3. Before obturation and closure of access cavity 4. All of the above
EndodonticsAnswer: 4
Most important and critical step in root canal preparation is 1) Biomechanical preparation 2) Isolation 3) Sterilisation 4) Obturation
EndodonticsAnswer: 1
Size of which root canals are enlarged depends on 1) Size of canal 2) Curvature of canal 3) Shape of canal 4) All of the above
EndodonticsAnswer: 4
Blood-borne seeding of bacteria into an area of previously damaged or irritated pulp with a resultant inflammation is known as 1) Bacterial endocarditis 2) Anchoretic pulpitis 3) Chronic hyperplastic pulpitis 4) Ulcerative pulpitis
EndodonticsAnswer: 2
Initial threshold of the electric test in a traumatic tooth 1) Is to establish base line of the physical status of the pulp 2) Is positive in healthy pulp 3) Is negative in root canal tooth 4) Is repeated after 30 days
EndodonticsAnswer: 1
The success of calcium hydroxide pulpotomy is determined by 1) Formation of a calcification bridge 2) Formation of hard base to support the restoration 3) Continuation of root formation & apexogenesis 4) All of the above
EndodonticsAnswer: 3
Exacerbation of infection occurs if following is used in root canal medicaments 1) Sodium hypochlorite 2) Prednisone 3) Zincoxide 4) Sodium caprylate
