The difference between a reamer and a file is in 1. The number of flutes 2. The number of flutes and shape of the shaft 3. The number of flutes and size of the shaft 4. The shape and size of the shaft
EndodonticsAnswer: 2
The main objective of access cavity preparation is 1. To obtain straight line access for proper instrumentation into the canal 2. To locate canal opening 3. To strengthen tooth structure by filling with restorative materials 4. All of the above
EndodonticsAnswer: 1
A root canal treated maxillary lateral incisor is fractured at the cervical level of the crown. The coronal end of silver cone which was used for root canal filling is visible. Select the line of treatment to achieve the required post space 1) Remove the silver cone and retreat the canal using a gutta-percha and then create space for the post 2) Create post space alongside the silver cone using burs and peeso reamers 3) Ginding away of the coronal part of the silver cone 4) None of the above
EndodonticsAnswer: 1
The most generally accepted treatment of horizontal root fracture in the apical third of a maxillary central incisor involves 1) Splinting with orthodontic bonds and a sectional arch wire 2) Frequent pulp testing and radiographic examination 3) Extraction of the tooth 4) Immediate pulp extirpation
EndodonticsAnswer: 2
Following are true for K-type file root canal instrument except 1. It is used for machining of dentin 2. The number of flutes on the blade is more in file than reamer 3. The file are fabricated from square or triangular crossection wire 4. Have more flexibility
EndodonticsAnswer: 1
Replacement resorption results in 1. Ankylosis 2. Pain 3. PA abscess 4. All of the above
EndodonticsAnswer: 1
Headstroem file is mainly used to 1) Flare the canal walls 2) To remove the lingual shoulder 3) To prepare canal for post preparation 4) All of the above
EndodonticsAnswer: 1
Night guard bleaching refers to 1. Laser activated bleaching 2. Dentist prescribed home applied technique 3. Thermo bleaching 4. Photo bleaching
