1 Cleaning and shaping of root canal system. ب الدفعة اول مجموعة من طجاي رح تطلعسبوع ال ا المفصولينToday we will talk about root canal preparation or chemo-mechanical preparation of root canal system Q > why do we need to prepare the root canal system? “For what purpose “ for a biological region which is , to remove all tissue and necrotic debris from the root canal system . Q> how to clean it? We can clean the canal by chemical means using irrigation solution and by mechanical mean using files in order to remove all necrotic tissues . Those surface which won’t reached by these files, like accessory canals throughout main root canals . For example, in molars, we have 3-4 root canals and still we have accessory canals in the furcation area or on the lateral side of the canal >> so we will use irrigate solution or chemical solution. Instruction while working *Each root canal is unique, it’s different form the adjacent canal , from adjacent root and from canal of adjacent tooth . *while cleaning we need to maintain the shape of the canal as it’s is , we shouldn’t change the internal shape of the canal by over widening , so conical shape canal won’t become rectangular.
12
Embed
Scr - 5- Cleaning and Shaping of Root Canal System.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
1
Cleaning and shaping of root canal system.
المفصولين االسبوع الجاي رح تطلع اول مجموعة من طالب الدفعة
Today we will talk about root canal preparation or chemo-mechanical preparation of root
canal system
Q > why do we need to prepare the root canal system? “For what purpose “
for a biological region which is , to remove all tissue and necrotic debris from the root canal
system .
Q> how to clean it?
We can clean the canal by chemical means using irrigation
solution and by mechanical mean using files in order to remove
all necrotic tissues .
Those surface which won’t reached by these files, like accessory
canals throughout main root canals . For example, in molars, we
have 3-4 root canals and still we have accessory canals in the
furcation area or on the lateral side of the canal >> so we will
use irrigate solution or chemical solution.
Instruction while working
*Each root canal is unique, it’s different form the adjacent
canal , from adjacent root and from canal of adjacent tooth .
*while cleaning we need to maintain the shape of the canal as
it’s is , we shouldn’t change the internal shape of the canal by
over widening , so conical shape canal won’t become
rectangular.
2
*we shouldn’t go beyond the apex .
Correct the 3rd status in the slide : the apical
constriction not position
* The apical constriction should be maintained >> apical
constriction: it’s dentin-centum junction in the apical part
which is away from the anatomical apex by 0.5 to 1.5 mm.
*Don’t’ over prepare the apical opening, we need an apical stop ( it’s where my gattaparka will
set )
*You need not to force the necrotic tissue beyond the anatomy of the apical apex
*try to complete cleaning and shaping in one visit , if u clean one canal and leave others for
next visit , root canal system will be still infected .
Slide 5
It’s the original shape of the canal , and after
preparation we need to maintain the same shape.
3
This tooth has a lateral canal in the
furcation area which causes this defect,
so we clean it using irrigant solution
then seals it by our obturation and
sealers.
Irrigant
*they should be antimicrobial.
*without irrigant we will be able to clean only 2-40% of
canal ( using it will clean 60% of canal )
Q> why we need them?
4
1- To flush out debries
2- - to be anti microbial
3- To dissolve organic material in pulp tissues and dentine