“ Endodontic processing temporary tooth in and permanent teeth with unformed root. Endodontic...
-
Upload
cora-franklin -
Category
Documents
-
view
216 -
download
0
Transcript of “ Endodontic processing temporary tooth in and permanent teeth with unformed root. Endodontic...
“Endodontic processing temporary tooth
in and permanent teeth with
unformed root. Endodontic tools and
techniques. Sealing Root
Channel in temporary and permanent
teeth in children.”
Lecturer: Dr. Katrin Duda
BASED ON FUNCTION
A)EXPLORING - to locate canal orifice and to assist in
obtaining patency of root canal
B) DEBRIDING - to extirpate pulp and remove debris
C) CLEANING AND SHAPING - clean and shape root canals
laterally and apically
D) OBTURATING - To pack filling material into root canal
MODE OF USE
A) HAND
B) ROTARY
• Instruments used in examination are
1)front surface mouth mirror _
overcomes the problem of associated
with double image
2)periodontalprobe
3)explorer
4)cotton forceps
• Long, narrow working ends.• Angle away from shank – easy access.• Locate canal openings.• Explore pulp chambers.
• Longer offset – better reach
• Excise pulp tissue from pulp chamber
• Made from soft iron wire• Machined from steel conical blank • And have numerous hooks as part of the blade • Used to remove Intact pulp tissue
REAMERS
Manufacturing by grinding Triangular blanks Triangle in cross section
Cutting tip Mode of action: Reaming action Rotation and passive withdrawal
Less number of flutes compared with k file
K file Manufacturing mainly from square blank long their long
axis Instruments with tighter spirals.
Mode of Action : filing (push and pull ) Watch-winding motion
K-FLEX:• Forerunner of hybrid instruments.• Hybrid – strength and versatility of K-type +
aggressive cutting of H-type.• Cross-section – rhombus or diamond.• Cutting edge – Two acute angles.• Alternating low flutes – obtuse angle – increase
debris removal.• Space reservoir – reduced compacting dentinal
filing.• Increase flexibility.
Hedstroem Files
Manufactured by grinding a conical steel wire.
Cut in one direction – retraction.
Cross-section – single helix teardrop
Cutting while pulling
Very aggressive
Uses:
• Useful for removal of Gutta-percha in re-treatment cases
•To remove /retrieve broken instruments
Standardization of Endodontic Instruments
Standardization of size
Sizing system goes as follow 6,8,10 ,15,20,25,30,35,40,45,50,55,60
60,70,80,90,100,110,120,130,140
Endodontic file sizing system is not arbitrary but it's based on the diameter of the instrument in the
handbreadth of the millimeters An instrument size 15 means that the diameter of
the instrument at D0= 0.15mm
Engine Driven Instruments USES
To increase speed and efficiency
•According to type of motions they can be classified as
1.Vibratory instruments 2.Sonic /ultra sonic
3. Rotary instruments
Gates – Glidden Drills
Size: From 1 to 6No.. 1 - file # 50No.. 2 -file # 70No.3-file # 90
No.4- file # 110No.5- file # 130No. 6 - file # 15015 or 19 mm long
3. Peeso Reamers
• Used for canal preparation• Parallel rather than elliptical shape..
Sizes:From 1 to 6
No.. 1 - file # 70No.. 2 -file # 90No.3-file # 110No.4- file # 130No.5- file # 150
No.. 6 - file # 170Not as well controlled as G.G. drill
Disadvantages Are aggressive and might rapidly over prepare the
canal or cause perforations if used incorrectly..
•Engine driven Nickel-Titanium instruments
Rotary Instruments
OBTURATING INSTRUMENTS :
1. Lentulo Spirals (paste carriers)
Rotated in clock wise direction after being introduced in the canal..
- It is removed from the canal while still rotating..- Care must be taken as not to extrude material to the apex..
2. Root canal spreaders:Used for lateral condensation [pointed end]
• Hand spreaders ( stiff )• Finger spreaders (Flexible )
• Standardized.
• NiTi finger spreaders• Used in curved canals for good obturation
OBTURATING MATERIAL (CORE MATERIAL)
-Gutta Percha • Silver points
• Reslion Root canal sealers
• Zinc oxide eugenol •Calcium hydroxide
•Resin sealers
Ultra Sonic Instruments:
• Ultrasonic files are attached to the hand piece for canal preparation.
• Ultrasonic Root canal diamond tips are used for canal flaring.
• Ultrasonic root canal spreaders used for thermo-mechanical condensation of
Gutta- percha
Other uses of endosonics::
In addition to the use of endosonic files to clean and shape the root canals, they
play valuable roles in:
1. Access refinement (canal location and identification)
2. Root canal retreatment (fractured instruments,, silver points ,, or posts)
3. Apical surgery (access to the root ends)
Removal of coronal and root restorative material.
Locating and opening of calcified root canals.
Elimination of root obturation material.
Pulp stone removal.
Removal of broken instruments.
USES
ELECTRONIC APEX LOCATOR
It’s a device for root canal length determination. Usually root canal measurements
depend on radiographs. But electric devices have been developed so that the apical
foramen could be located with the use of an electric current.
Mode of Use
A lip clip is attached to the patient’s lip and another electrode is
attached to the file. When the apex is reached, a beep is heard and
a light illuminates in the device indicating the apex.
Mechanism
The Electrical resistance between the
mucosa and Periodontal ligament is
constant.
Electric resistance is felt when a metal
instrument reaches the
apex and the beep is produced.
Irrigation syringes
For introduction of the irrigating solutions inside the root canal.
The needle should have many designs that would not allow the
irrigating solution to be forced apically.
ABSORBENT PAPER POINTS:
Slender cones made of paper or other absorbent material.
Uses – drying the canal
Conveying medicaments
Obtaining canal cultures
Available in standardized sizes
А Б
А Б
А
Б
АБ
А Б
THANK YOU