Root Canal Preparation Quiz

Play an AI-generated podcast conversation about this lesson

Which of the following is NOT one of the biological objectives of root canal preparation?

Completing the procedure in one appointment
Removal of organic debris
Creating a larger opening for additional light (correct)
Avoiding pushing necrotic debris beyond the apical foramen

The primary purpose of preparing a glide path is to ensure easy access to the middle parts of the root canal.

False (B)

What is the first step in the mechanical root canal preparation process?

Preparation of the coronal access cavity

The __________ constriction is also referred to as the anatomic apex.

apical Signup and view all the answers

Match the following parts of the mechanical preparation process with their descriptions:

Preparation of the coronal access cavity = Initial entry into the tooth Identifying root canal orifices = Locating the openings of the canals Preparing a glide path = Facilitating access to the apical foramen Preparing the middle and apical parts of the root canal = Final shaping of the canal Signup and view all the answers

What is the correct order of steps in root canal preparation?

Shaping then cleaning (B) Signup and view all the answers

Maintaining the apical foramen position is an objective of root canal preparation.

True (A) Signup and view all the answers

What are the primary objectives of cleaning and shaping in root canal preparation?

Remove infected tissue, provide access for disinfecting irrigants, create space for medicaments, and maintain integrity of radicular structures. Signup and view all the answers

The preparation should form a continuously tapering ________ from the apex to the access cavity.

funnel Signup and view all the answers

Match the following mechanical objectives with their descriptions:

Continuously tapering funnel = The preparation should form a continuous taper from the apex to the access cavity. Narrowing cross-sectional diameter = The diameter should consistently narrow as it approaches the apex. Following the original canal shape = The preparation should closely mimic the shape of the original canal. Maintaining apical foramen position = The apical foramen should remain in its original position. Signup and view all the answers

What is one of the primary goals when preparing the pulp chamber?

To clean all necrotic or vital tissue (B) Signup and view all the answers

Mechanical cleaning of the pulp chamber is unnecessary if sodium hypochlorite is used.

False (B) Signup and view all the answers

What can cause difficulties in locating and preparing root canal orifices?

Calcifications and pulp stones Signup and view all the answers

Calcification is usually incomplete and limited to the _______ part(s) of the root canal.

coronal Signup and view all the answers

Match the following indicators with their meanings regarding root canal calcification:

A canal space detected on radiograph = Calcification is incomplete File tip engaging inside the canal = Calcification is incomplete Electronic signal during root canal length determination = Calcification is incomplete Presence of an apical lesion = Calcification is incomplete Bubbles observed during irrigation = Calcification is incomplete Pain upon instrumentation = Calcification is incomplete Signup and view all the answers

What does the Law of Centrality state regarding the pulp chamber?

The pulp chamber floor is at the center of the tooth at the level of the Cemento-Enamel Junction. (B) Signup and view all the answers

The Law of Color Change indicates that the color of the pulp chamber floor is lighter than the walls.

False (B) Signup and view all the answers

According to the Laws of Symmetry, how are the orifices of the canals positioned relative to the pulp chamber floor?

Equidistant from a mesial-distal line and on a perpendicular line. Signup and view all the answers

The distance from the external surface of the clinical crown to the wall of the pulp chamber is the same throughout the circumference of the tooth at the level of the _____

CEJ Signup and view all the answers

Match the laws to their descriptions:

Law of Centrality = Pulp chamber floor is centered at the CEJ. Law of Concentricity = Pulp chamber walls reflect external tooth surface anatomy. Law of Color Change = Pulp chamber floor color is darker than walls. Laws of Orifice Location = Orifices are located at junctions of walls and floor. Signup and view all the answers

What is the purpose of using a Dental Explorer in endodontics?

To locate root canal orifices (D) Signup and view all the answers

Debris on the pulp chamber floor does not affect the location of canal orifices.

False (B) Signup and view all the answers

What technique can be used to reveal the orifice of root canals?

Chipping away dentinal shavings Signup and view all the answers

The orifices of the root canals are located at the termini of the root developmental ________ lines.

fusion Signup and view all the answers

Match the tools with their purposes in endodontics:

Dental Explorer = Locating root canal orifices Dyes = Enhancing visibility of structures Hypochlorite = Cleansing and bleaching Endodontic Explorer = Shaving dentinal debris Signup and view all the answers

What does the presence of remaining dye in the access cavity indicate?

Location of a previous undiscovered opening (D) Signup and view all the answers

Sodium hypochlorite is applied to the access cavity floor to search for hidden root canals using a visual bubble test.

True (A) Signup and view all the answers

What chemical is used for the bubble test to identify hidden root canals?

Sodium hypochlorite Signup and view all the answers

A drop of sodium hypochlorite applied to the access cavity shows bubbles caused by the disintegration of _______ tissue.

pulp Signup and view all the answers

Match the following terms with their definitions:

Methylene blue = A dye used to identify openings in the cavity Sodium hypochlorite = A chemical used for the bubble test Champagne test = Observation of bubbles from remaining pulp tissue Access cavity = The entry point for cleaning the root canal Signup and view all the answers

What is one of the main benefits of coronal flaring in root canal preparation?

It reduces friction and allows better control of instruments. (C) Signup and view all the answers

Coronal flaring can allow the application of large amounts of irrigant early in the preparation process.

True (A) Signup and view all the answers

Name one type of instrument used for coronal flaring.

Gates-Glidden Signup and view all the answers

Coronal flaring helps to reduce the degree of the __________.

curvature Signup and view all the answers

Match the following instruments with their descriptions:

Gates-Glidden = Type of drill used for coronal flaring Peeso Drills = Used for enlarging the canal Orifice Openers = Facilitates access to the canal Peeso Reamers = Used to prepare the coronal portion of the canal Signup and view all the answers

Which of the following is a characteristic of K-files used in glide path preparation?

They can be used in a watch-winding motion. (A) Signup and view all the answers

C+ files have a uniform taper along their entire length.

False (B) Signup and view all the answers

What is the primary advantage of using special stainless steel pathfinding instruments?

Improved negotiation of narrow and calcified canals. Signup and view all the answers

What is the primary advantage of the non-cutting, rounded tip design of PathFiles?

It prevents ledges and gaps. (A) Signup and view all the answers

The __________ of conventional ISO size instruments leads to deformation when penetrating narrow canals.

low resistance to buckling Signup and view all the answers

PathFiles have a square cross-section to reduce torsional stress.

True (A) Signup and view all the answers

What materials are PathFiles predominantly made from?

Nickel-titanium alloy Signup and view all the answers

The tip diameters of the PathFiles are 0.13 mm, 0.16 mm, and ________.

0.19 mm Signup and view all the answers

Match the PathFile with its tip diameter:

Pathfile 0.13mm = Smallest tip diameter Pathfile 0.16mm = Medium tip diameter Pathfile 0.19mm = Largest tip diameter Signup and view all the answers

What is the primary action involved in the filing motion during root canal preparation?

A combination of pushing and pulling (C) Signup and view all the answers

The reaming motion is performed counterclockwise to create a round cross-section of the root canal.

False (B) Signup and view all the answers

What type of motion is considered the most efficient for cutting dentin?

Linear motion Signup and view all the answers

The ____ is the best file for enlarging the coronal two-thirds of the canal.

H-file Signup and view all the answers

Match the following motions with their descriptions:

Filing Motion = Linear motion using push and pull Reaming Motion = Rotational motion creating a round cross-section H-file = Best for enlarging coronal two-thirds Instrument Fracture Risk = Increased with reaming motion Signup and view all the answers

Root Canal Preparation

The process of removing infected tissue and creating a space for filling the root canal.

Shaping then Cleaning

The sequence of first shaping the root canal followed by cleaning it, allowing for better access and removal of infected tissue.

Enlarging Canals

A crucial step in root canal treatment where the root canal is enlarged to allow for cleaning and filling.