Endodontic Year 2

The ideal shape of an access cavity of an upper central incisor is

• Triangle

• Inverted triangle

• Oval

• Rhomboidal

What is the most prominent mistake during access cavity on the above picture?

• Missing a canal

• Improper rubber dam isolation

• Failed to unroof the pulp chamber

• Improper outline form of the access cavity

What does these images represent?

• Isthmuses

• Lateral canals

• Accessory canals

• Apical Delta

What is the aim of root canal treatment?

• To eliminate or at least reduce the number of microorganisms and remove inflamed or necrotic pulp tissue

• The root canal is cleaned of their organic remnants and shaped to receive a three dimensional hermetic filling

• The main root canals should be rapidly and efficiently shaped with instrument to permit cleaning of the entire plural system

• To facilitate cleaning and provide space for placing the obturating materials

The biological objectives of shaping and cleaning in RCT are as follows, EXCEPT...

• To remove pulp tissue that may support microbial growth

• To decreases procedural error when cleaning and enlarging apically

• Eliminate microorganisms from the root canal system

• To avoid forcing debris beyond the apical foramen which may sustain inflammation

What is the objective of shaping and cleaning outline by no 5 from the above diagram?

• Continuously tapering funnel shape from the access cavity to the apical foramen

• Maintain the path of original canal

• The apical foramen should remain in its original position

• Cross sectional diameter should be narrower every point apically

The MOST acceptable and safe method of instrument manipulation is the...

• watch-winding method

• circumferential filing

• balanced force technique

• anti curvature filing

The followings are methods used in coronal-apical technique of shaping and cleaning EXCEPT:

• Step-back technique

• Step-down technique

• Double-flare technique

• Crown down technique

The CORRECT sequence of shaping and cleaning are:

• Coronal flaring, working length determination, apical preparation

• Working length determination, coronal flaring, apical preparation

• Apical preparation, coronal flaring, working length determination

• Coronal flaring, apical preparation, working length determination

What is the obturation technique outline by the picture above?

• Cold lateral compaction technique

• Warm lateral compaction technique

• Carier-based technique

• Warm vertical condensation technique