Assisting with Endodontic Procedures Flashcards

What is the primary function of a barbed broach in endodontics?

Answer: To remove the bulk of the pulp tissue

A barbed broach is a thin, flexible instrument with sharp barbs angled towards the handle. It is carefully inserted into the root canal to engage and remove the bulk of the pulpal tissue in one piece.

The most common irrigant used to disinfect the canal system during root canal therapy is:

Answer: Sodium hypochlorite

Sodium hypochlorite (NaOCl), which is essentially household bleach in a diluted and purified form, is the most widely used irrigant. It is highly effective at dissolving necrotic tissue and killing bacteria within the complex root canal system.

What is the term for the procedure of filling the root canal with a biocompatible material after it has been cleaned and shaped?

Answer: Obturation

Obturation is the final step of root canal treatment before the permanent restoration. It involves filling the prepared canal space with a sealing material, most commonly gutta-percha and a root canal sealer, to prevent re-infection.

Which of the following are used to dry the root canal completely before it is filled?

Answer: Paper points

Paper points are sterile, absorbent paper cones that are sized to match the endodontic files. They are inserted into the canal to absorb any remaining moisture or irrigant, ensuring the canal is completely dry for optimal sealing during obturation.

An endodontic diagnostic test that involves tapping on the incisal or occlusal surface of a tooth is called:

Answer: Percussion

The percussion test is used to determine if inflammation has extended to the periapical tissues (the area around the root tip). Pain upon tapping can indicate periapical periodontitis, which helps the dentist diagnose the source of a patient's pain.

The master cone in endodontics refers to:

Answer: The primary gutta-percha point used to fill the canal

The master cone is the primary gutta-percha point selected to fit the full working length of the prepared canal. It should have a snug fit at the apex (a phenomenon called 'tug-back') before additional accessory cones are compacted around it.

What is the purpose of using a rubber dam during endodontic treatment?

Answer: To prevent contamination and protect the patient's airway

A rubber dam is essential in endodontics for several reasons. It isolates the tooth from the oral environment, preventing contamination from saliva and bacteria, and it protects the patient from aspirating or swallowing small instruments, irrigants, or debris.