What are K files used for?
K files are the universal standard for canal negotiation, shaping, and recapitulation of root canal systems. They are generally used with a quarter turn “watch-winding” motion and vertical pull.
What is the difference between K files and H files?
All K-files are mainly intended for rotary motions inside the canals. On the other hand, H-files are specially designed for shaping canals after they are previously cleaned and enlarged with K-files. They are made out of the ground wire and have a tear-drop cross-sectional shape.
What is K-reamer?
K-Reamer with three cutting edges Compared to the K-File the K-Reamer has an open spiral design with three cutting edges, a 60° tip and a 120° cutting angle. It is designed to effectively enlarge the root canals. The instrument has an excellent debris transportation.
Which is more flexible K-file or reamer?
Another difference is that the file is usually made from a rectangular blank, whereas the reamer has a triangular cross section. Because of its fewer flutes and triangular cross section, the K-reamer is a much more flexible instrument than the K-file.
In what motion files and reamers are recommended to be used?
They are used in sequence to remove the coronal (D1), mid (D2) and apical (D3) ⅓ root filling material more efficiently before the final shaping with conventional instruments. D1 is 16mm in length with a cutting end tip to engage the filling material in the canal.
What is K type file?
The K-type file is manufactured by twisting or grinding a square or triangular tapered shaft so that the cutting edges are almost perpendicular to the long access of the instrument. It is the instrument most commonly used for cleaning and shaping.
What is the difference between K-files and C files?
C-files are stiffer than K-files, and are recommended for calcified canals and ones that are curved and narrow.
What does K file mean?
Premier K-Files are used to enlarge canal after debridement with a reamer. After reamer, use a file one size smaller than the reamer so that the fragments of dentinal shavings can be carried away from the root-canal walls. Use in clockwise direction (1/4 turn only), then withdraw. Safe-End Tip on sizes 06 – 40.
What is circumferential filing?
Circumferential filing is used for canals that are larger and or not round. The file is placed into the canal and withdrawn in a directional manner sequentially against the mesial, distal, buccal, and lingual walls.
What is a Hedstrom file?
Hedstrom Files are used for more rapid enlargement of root canals. The cutting edges are inclined backwards, making insertion easy since there is no cutting taking place on the insertion stroke. When the instrument is withdrawn, cutting takes place and debris is carried away from the apex.
What is the taper of K files?
The ISO stainless steel files on the market today include K-Flex, K-Flexofile and Hedström where the tip size and taper is standardised. ISO normed hand files have a standardised taper of 2% that equates to 0.02mm increase in diameter per mm of file.
What is the difference between K file and K reamer?
K Files are made up with a wire of cut from a tapered instrument ending at the tip giving its tip a square cross-section. These can be used in filling action or in reaming action. K Reamers have a triangular cross-section with loose spirals around the flute. Reamers have 2.5 times more cutting efficiency.