Instrument that is more likely to break in root canal when twisted more than 90 degree 1. File 2. Broach 3. Spreader 4. Reamer
EndodonticsAnswer: 2
The teeth that are more prone to perforation by slight mesial and distal deviation of a bur are 1) Mandibular incisors & maxillary first premolars 2) Maxillary first premolars & mandibular molar 3) Maxillary incisors & mandibular molars 4) Maxillary molar & mandibular first premolar
EndodonticsAnswer: 1
The origin of calcium ions in a calcific bridge formed by calcium hydroxide is 1) From calcium hydroxide itself 2) From underlying dentin 3) Through blood stream via pulp 4) From periapical tissues
EndodonticsAnswer: 3
RC-prep is a combination of 1) EDTA with carbamide periodide 2) EDTA with hydrogen periodide 3) EDTA with sodium hypochlorite 4) EDTA with urea periodide
EndodonticsAnswer: 4
For at least how long calcium hydroxide remains when it is applied to residual carious dentin in the indirect pulp treatment technique? 1) 6 months 2) 6 to 8 weeks 3) 2 weeks 4) 5 to 7 days
EndodonticsAnswer: 2
All of the following may result in underfilling of a root canal except 1. Apical perforation 2. Ledge formation 3. Short length estimation 4. Lateral perforation
EndodonticsAnswer: 1
The tooth is tender on vertical percussion. It may be due to 1. Osteomyelitis 2. Periapical inflammation 3. Necrotic pulp 4. Angular bone loss
EndodonticsAnswer: 2
Calcium hydroxide was introduced into endodontics by 1. Nygaard Ostby 2. Hermann 3. Schilder 4. Hunter
