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3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
Tip Design.
Instrument tips have
been described as
1. cutting
2. noncutting
3. partially cutting
The instrument tip has
two functions:
1. to enlarge the canal
2. and to guide the file
through the canal
A clinician who is unfamiliar with the tip design
of a particular instrument is apt to do either
of the following:
(1) transport the canal (if the tip is capable of
enlarging the canal and remains too long in
one position)
Or
(2) encounter excessive torsion and break
the file (if a noncutting tip is forced into a
canal with a smaller diameter than the tip).
A good beginner’s rule is this:
1. If the canal is smaller than the file, a cutting
tip is more efficient.
2. If the canal is larger than the file, using a
less effective cutting tip can help prevent
transportation
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
Hand Instruments for Canal
identification
The endodontic
explorer: has two
straight, very sharp
ends that are angled in
two different directions
from the long axis of the
instrument
endodontic spoons:
These spoons have a
much longer offset from
the long axis of the
instrument (for better
reach inside constricted
pulp chambers) than
regular dental spoons.
The spoons are used to
remove carious material
and to excise pulp
tissue
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
 The number of sides
and the number of
spirals determine
whether the
instrument is best
suite for filing or
reaming.
 A file has more flutes
per length unit than a
reamer.
Besides their configuration,
the difference between files
and reamers is their
intended use.
Files are manipulated with
a rasping, or push-pull
planing motion.
Reamers are twisted and
withdrawn; therefore,
cutting takes place during
rotation.
The use of reamers has declined in
popularity because of
1. their lack of flexibility (especially in larger
sizes),
2. their inability to prepare canals with
anything other than a round crosssection,
3. and their lack of cutting efficiency when
compared with other instruments.
K-Type Instruments
made from a steel wire
that is ground to a
tapered square or
triangular cross section
the wire then was
rotated to form the
spiral instrument
Permanent deformation occurs
when the flutes become wound
more tightly or opened more
widely
failure occurs in the
counterclockwise direction more
often the clockwise direction.
Therefore K-type instruments
should be operated more carefully
when pressure is applied in a
counterclockwise direction.
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx
3 endodontic-instruments-oral health rct pptx

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3 endodontic-instruments-oral health rct pptx

  • 34. Tip Design. Instrument tips have been described as 1. cutting 2. noncutting 3. partially cutting The instrument tip has two functions: 1. to enlarge the canal 2. and to guide the file through the canal
  • 35. A clinician who is unfamiliar with the tip design of a particular instrument is apt to do either of the following: (1) transport the canal (if the tip is capable of enlarging the canal and remains too long in one position) Or (2) encounter excessive torsion and break the file (if a noncutting tip is forced into a canal with a smaller diameter than the tip).
  • 36. A good beginner’s rule is this: 1. If the canal is smaller than the file, a cutting tip is more efficient. 2. If the canal is larger than the file, using a less effective cutting tip can help prevent transportation
  • 44. Hand Instruments for Canal identification The endodontic explorer: has two straight, very sharp ends that are angled in two different directions from the long axis of the instrument
  • 45. endodontic spoons: These spoons have a much longer offset from the long axis of the instrument (for better reach inside constricted pulp chambers) than regular dental spoons. The spoons are used to remove carious material and to excise pulp tissue
  • 52.  The number of sides and the number of spirals determine whether the instrument is best suite for filing or reaming.  A file has more flutes per length unit than a reamer.
  • 53. Besides their configuration, the difference between files and reamers is their intended use. Files are manipulated with a rasping, or push-pull planing motion. Reamers are twisted and withdrawn; therefore, cutting takes place during rotation.
  • 54. The use of reamers has declined in popularity because of 1. their lack of flexibility (especially in larger sizes), 2. their inability to prepare canals with anything other than a round crosssection, 3. and their lack of cutting efficiency when compared with other instruments.
  • 55. K-Type Instruments made from a steel wire that is ground to a tapered square or triangular cross section the wire then was rotated to form the spiral instrument
  • 56. Permanent deformation occurs when the flutes become wound more tightly or opened more widely failure occurs in the counterclockwise direction more often the clockwise direction. Therefore K-type instruments should be operated more carefully when pressure is applied in a counterclockwise direction.