Root Canal Obturation Flashcards

Questions and Answers

The ultimate objective of the root canal therapy is the:

Removing of all old obturation contents

Three-dimensional hermetic obturation (correct)

Irrigation with as many irrigants as possible

Devitalisation of the pulp

The purpose of obturation is:

To be able to see good radiological image of the canal/s

To place powerful antibiotic or corticosteroid inside to disinfect the area

To seal all 'portals of exit' to impede any sort of communication between the endodontium and periodontium (correct)

To fill the canals and cavum pulpae in order to have a stable base for the future restoration

Most endodontic failures are related to:

Not properly made X-ray trough parallel technique

Not using Ni-Ti machine driven instruments

Incomplete obturation of the endodontium (correct)

Using a needle with a lateral opening for the irrigating protocol

There is a 'hollow tube theory,' according to which:

An empty space within a living organism tends to fill with tissue fluids in a short period of time Signup and view all the answers

'Anachoresis' in endodontics is concerning to:

Fluids that accumulate within empty spaces of the canal are rapidly colonized by bacteria Signup and view all the answers

Fluids that accumulate within empty spaces are rapidly colonized by bacteria which reach these spaces by means of a phenomenon of:

Anachoresis Signup and view all the answers

The practice of Endodontics based on chemotherapy, antimicrobial agents, and mummifiers:

Is out-dated Signup and view all the answers

According to early authors there are fundamental principles for the success of endodontic therapy and the elimination of periapical inflammation. They are:

Enlargement, cleaning, and filling Signup and view all the answers

The use of medicated pastes to sterilize and seal the root canals must therefore now be considered:

Anachronistic Signup and view all the answers

Mark the odd one out: Requirements for the ideal root canal filling material are:

To be able to sterilize the canal Signup and view all the answers

Mark the odd one out: Requirements for the ideal root canal filling material are to:

Be a conductor of thermal changes Signup and view all the answers

Pastes as an obturating material in endodontics are:

Used to fill the entire canal Signup and view all the answers

Biologically, it would be desirable to fill the entire canal with:

A solid or semisolid material Signup and view all the answers

The cement or 'sealer' must be used in minimal amounts, since it:

Must only improve the adaptation to the canal walls of the gutta-percha Signup and view all the answers

The weakest part of the obturation of a root canal is:

The cement Signup and view all the answers

Mark the odd one out: Cements for obturation of root canals must:

Be used as the only canal filling material Signup and view all the answers

A semi-solid material for obturation of root canals is:

Gutta-percha Signup and view all the answers

Once the gutta-percha is....................., it can be compacted against the canal walls in such a way as to eliminate and collapse any voids present in commercial gutta-percha:

Softened by heat Signup and view all the answers

Primarily constituted of zinc oxide, gutta-percha is in practice a..................material:

Non-resorbable Signup and view all the answers

Gutta-percha is readily sterilizable with:

Immersion in 5.25% sodium hypochlorite for 60 seconds Signup and view all the answers

Study Notes

Root Canal Obturation Overview

The ultimate goal of root canal therapy is three-dimensional hermetic obturation.
Key purpose of obturation is to seal all "portals of exit" to prevent communication between the endodontium and periodontium.

Endodontic Failures

Most endodontic failures occur due to incomplete obturation of the endodontium.
Techniques such as proper X-ray use and tool selection significantly affect treatment success.

Hollow Tube Theory

This theory posits that empty spaces in a living organism fill with tissue fluids rapidly.
Achieving better seal relies on properly obturating lateral canals surrounding the main canal.

Anachoresis in Endodontics

Anachoresis describes the rapid colonization of fluids in empty canal spaces by bacteria.
Endodontic files' ability to reach physiological apex is essential for proper treatment.

Treatment Practices

Use of chemotherapy, antimicrobial agents, and mummification methods are considered out-dated practices.
Early authors emphasize enlargement, cleaning, and filling as critical for successful endodontic therapy.

Medicated Pastes and Their Usage

Use of medicated pastes for sterilization and sealing root canals is viewed as anachronistic.
Ideal root canal filling materials should not sterilize the canal but be bacteriostatic and non-irritating.

Requirements for Filling Materials

Ideal materials must be easily manipulated, sterile, and removable if necessary.
Gutta-percha is identified as a semi-solid material suitable for filling entire canals.

Properties of Gutta-Percha

Gutta-percha, primarily zinc oxide, is non-resorbable and can be sterilized efficiently.
Softening by heat allows for optimal compaction against canal walls to eliminate voids.

Role of Sealers

Sealers are used in minimal amounts to improve gutta-percha adaptation and seal the canal.
The weakest link in obturation is identified as the cement, rather than gutta-percha itself.

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Description

Test your knowledge about the definition, goals, means, and methods of root canal obturation with these flashcards. Learn the ultimate objectives and the importance of hermetic sealing in root canal therapy. Perfect for dental students and practitioners looking to reinforce their understanding.