P1-ENDO-1ST LECTURE PPT

ROot canal system

this is the entire space in the dentin housing the pulp

1. Aging

2. Disease(pathosis)

3.Occlusion

4. Formation of secondary/tertiary dentin & cementum

4 COMPONENTS THAT MODIFY THE DIMENSIONS OF THE ROOT CANAL SYSTEM

1. Pulp chamber

2. Pulp or root canal(s)

2 portions of root canal system

Pulp chamber

This portion of root canal system is located in anatomic crown of the tooth

Pulp or root canal(s)

This portion of root canal system is located in found in the anatomic root

Funnel-shaped canal orifice

What is the shape of the orifice in the root canal

Faciolingual direction

Which direction does the root canals curve into

Accessory canals

These are minute canals that extend in a horizontal, vertical, or lateral direction from the pulp to the periodontium.

Connective tissue and vessels

What does accessorycanals contain?

74% in apical third

How much percent of accessory canals are found in apical third?

11% in the middle third

How much percent of accessory canals are found in middle third

15% in the cervical third

How much percent of accessory canals are found in the cervical third

Type 1

In weine'es classifcation, What type is a single canal from pulp chamber to the apex

Type II

In weine's classifcation, What type is a 2 separate canals leaving the chamber, but merging short of the canal terminus to a form a single canal

Type III

In weine's classifcation, What type is a 2 distinct canals from pulp chamber to the canal terminus

Type IV

In weine's classifcation, What type is a single canal leaving the chamber and dividing into two separate canals at the canal terminus

Type I (1)

In Vertucci's classifcation, What type is A single canal extends from the pulp chamber to the

apex

Type II (2-1)

In Vertuccis's classifcation, What type is a Two separate canals leave the pulp chamber and join

short of the apex to form one canal

Type III(1-2-1)

In Vertuccis's classifcation, What type is One canal leaves the pulp chamber and divides into

two in the root; the two then merge to exit as one canal

Type IV(2)

In Vertuccis's classifcation, What type is Two separate, distinct canals extend from the pulp

chamber to the apex

Type V(1-2)

In Vertuccis's classifcation, What type is One canal leaves the pulp chamber and divides short

of the apex into two separate, distinct canals with separate apical foramina

Type VI(2-1-2)

In Vertuccis's classifcation, What type is Two separate canals leave the pulp chamber, merge

in the body of the root, and redivide short of the apex to exit as two distinct canals

Type VII(1-2-1-2)

In Vertuccis's classifcation, What type is

Type VIII(3)

In Vertuccis's classifcation, What type is

1.Apical constriction (AC)

2. The CementoDentinal Junction (CDJ)

3. Apical Foramen (AF)

classic concept of apical root anatomy is based on three anatomic and histologic landmarks

Apical constriction

This is the part of the root canal with smallest diameter

Apical constriction (AC)

What apical root anatomy is the reference point clinicians use most often as the apical termination for shaping , cleaning and obturation

0.5-1.5mm

How much mm does the apical constriction tapers coronal to the apical foramen?

TRue

True or false: pulp vessels are narrow at apical constriction, making inflammation treatment in the canal difficult

Cementodentinal Junction

Ths is the point in the canal where cementum meets dentin, where pulp tissue ends and periodontal tissues being

1mm

what estimation mm of the CDJ placement from the AF

Funnel shaped or hyperbollic or Shape of morning glory

What is the shape between the major and minor diameters

0.5mm

What is the mean distance between major (AF) and minor (AC) apical diameters in younger patients

0.67mm

What is the mean distance between major (AF) and minor (AC) apical diameters in older patients

Apical foramen

This is the circumference or rounded edge, like a funnel or crater , that differentiates the termination of the cemental canal from exterior surface of the root

Apical foramen

THis is also known as major foramen, major diameter, or major apical diamter

1mm from the apex

In anatomy of the apical root, how much mm from the apex where no bone or rot resorption occured?

1.5mm from the apex

In anatomy of the apical root, how much mm from the apex where Only bone resorption occured

2mm from the apex

In anatomy of the apical root, how much mm from the apex where both bone and oot resorption occured

Dental Operating Micrscope (DOM

This device is used in:

-locating root canals

-PRovides enhanced lighting and visibility

-Remve dentin with great precision, minimizing procedural errors