Endodontic Therapy

Questions and Answers

What is the main goal of root canal treatment?

To remove only necrotic pulp remnants

To create a large space for irrigation and medication

To remove only microorganisms from the root canal

To prevent the development of a periapical lesion and provide conditions for healing (correct)

What should be eliminated from the interior of the root canal?

Only microorganisms

All potential irritants (correct)

Only necrotic pulp remnants

Only bacterial products

What shape should the preparation of the root canal have?

Straight cylindrical shape

Infundibular or continuous funnel shape from apical to coronal (correct)

Conical shape from apical to coronal

Reverse funnel shape from coronal to apical

What should be maintained during root canal preparation?

The original shape and spatial relationship of the foramen apical Signup and view all the answers

What is the purpose of creating a sufficient amount of space in the root canal?

To allow for copious irrigation and medication placement Signup and view all the answers

What type of lesion is the root canal treatment trying to prevent?

Periapical lesion Signup and view all the answers

What should the diameter of the root canal be towards the coronal?

Wider Signup and view all the answers

What is the purpose of conforming the root canal?

To receive the obturation material Signup and view all the answers

What is the primary purpose of taking a radiograph with an Endo-Ray device?

To verify the position of the instrument in the apical constriction Signup and view all the answers

What is the significance of having a retention in the apical region of the instrument?

To prevent the instrument from becoming loose Signup and view all the answers

In which type of teeth may the working length appear shorter due to excess cement?

Teeth with hypercementosis Signup and view all the answers

What is the purpose of using a millimeter ruler in endodontic treatment?

To measure the distance from the top of the gum to the instrument tip Signup and view all the answers

What is the consequence of resorption apical in terms of the apical foramen position?

The foramen moves away from the apex Signup and view all the answers

What is the purpose of the Clark rule in endodontic treatment?

To determine the working length of multi-rooted teeth Signup and view all the answers

What is the primary objective of the Conventional or Serialized technique?

To create a preparation with the same size, form and conicity as a standardized endodontic instrument Signup and view all the answers

What is the extension of the dentin pericervical?

4mm towards the crown and 4mm towards the apex Signup and view all the answers

Why is it important to preserve the dentin pericervical?

To decrease the risk of fracture Signup and view all the answers

What is the term for the movement of the instrument in the Anti-curvature technique?

Pushing and pulling Signup and view all the answers

What is the name of the technique that involves preparing the canal in a coronal-apical direction?

Corono-Apical Signup and view all the answers

What is the importance of a circumferential filing of the root canal?

To touch all walls of the canal Signup and view all the answers

How many series of instruments may be needed in the Conventional or Serialized technique?

One or two series Signup and view all the answers

Why is the dentin pericervical considered insustituible?

Because it is essential for dissipating masticatory forces and preventing fractures Signup and view all the answers

What is the main objective of avoiding the centralization of the root canal?

To avoid enderezamiento of the curved root canal and perforation of its walls Signup and view all the answers

What is the purpose of introducing files with support in the Safety Zone?

To reduce the risk of perforation in the curved area Signup and view all the answers

What is the year in which Roane and cols proposed the Fuerzas Balanceadas?

1985 Signup and view all the answers

What is the purpose of using a rotational clockwise movement in the Fuerzas Balanceadas technique?

To position and preload an instrument through a rotational clockwise movement Signup and view all the answers

What type of alloy are the manual K-files used in the Fuerzas Balanceadas technique made of?

Nickel Titanium (NiTi) Signup and view all the answers

What is the length of the files used in the Fuerzas Balanceadas technique?

21mm and 25mm Signup and view all the answers

In which type of curvatures is the Fuerzas Balanceadas technique indicated?

Moderate curvatures Signup and view all the answers

What is the purpose of the Safety Zone in instrumentation?

To provide a thicker dentinal wall for file support Signup and view all the answers

What is the main objective of the technique described?

To straighten the curved radicular canal Signup and view all the answers

Where is the radicular canal usually located in a root?

At the thickest part of the root wall Signup and view all the answers

What is the 'zone of danger' in a root canal?

The thinnest part of the root wall Signup and view all the answers

Why is it important to avoid the 'zone of danger' during root canal preparation?

To avoid perforation of the radicular wall Signup and view all the answers

What is the typical shape of the radicular canal in a molar tooth?

Curved Signup and view all the answers

Which of the following teeth are more likely to have 'zones of danger'?

Molars Signup and view all the answers

What should the dentist rely on during root canal preparation?

The thickest part of the root wall Signup and view all the answers

What can occur if the 'zone of danger' is not avoided during root canal preparation?

All of the above Signup and view all the answers

Study Notes

Objectives of Root Canal Treatment

Eliminate potential irritants within the root canal
Clean and shape the root canal in a single session
Create sufficient space for copious irrigation and medication placement
Prevent periapical lesions and provide conditions for healing
Avoid apical lesions and prevent periodontitis

Mechanical Objectives

Prepare the root canal to receive filling material
Shape the root canal:
- Infundibular or continuous funnel shape from apical to coronal
- Increasing diameter towards coronal and decreasing towards apical
- Maintain natural root canal shape
- Preserve apical foramen shape and spatial relationship
Introduce the smallest instrument that can reach the full length of the root canal

Conductometry

Use a small instrument with retention in apical
Take a periapical radiograph with an Endo-Ray device
Process the radiograph and check if the instrument tip is at the apical constriction
Revise measurements with a millimeter-ruled instrument

Modifications of Foramen and Apical Constriction Position

Presence of apical resorption, often in chronic periodontitis cases
Teeth with hypercementosis, which can modify foramen apical position

Root Canal Preparation Techniques

Chemical-mechanical preparation techniques:
- Conventional or serial
- Telescopic or stepped
- Corono-apical (crown-down)
- Anti-curvature (movement)
- Balanced forces

Conventional or Serial Technique

Objective: Create a preparation with the same size, shape, and conicity as a standardized endodontic instrument
Method: Prepare the root canal from the coronal reference point to the apical constriction using K files and enlargers in sequence

Fuerzas Balanceadas Technique

Proposed by Roane et al. in 1985
Objectives:
- Reduce the influence of curvature on instrument size reduction
- Prevent root canal deformation during instrumentation
Fundamentals:
- Positioning and precarga of an instrument through clockwise rotation
- Conforming the canal with counterclockwise rotation
Indicated for moderate curvatures and narrow canals

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Description

This quiz covers the steps involved in endodontic therapy, including eliminating irritants, cleaning and shaping the root canal, and creating space for irrigation and medication. It also touches on the removal of noxious agents and necrotic pulp remnants.