This twisting results in 0.9 to 1.9 cutting edge per millimeter length. It is made by twisting a rectangular or a square blank into a closely packed series of spirals. K file, introduced by Kerr Company, is most commonly used for cleaning and shaping. Following are common types of files used during endodontic treatment: Correct usage of endo files facilitates disinfection of the root canal and produces a shape that is suitable for obturation. The purpose of their usage is complete cleaning and debridement of the root canal up to the length of the apical foramen. Endo files are mainly used with filing or rasping actions during which there is almost no rotation of instruments in the root canal. Most of the time they are made from stainless steel which gives them a high degree of elasticity and tensile strength. There are different types of root canal files. Below is a review of different groups of instruments used in endodontics. Endo files and endo reamers are instruments that are used for root canal preparation. A variety of endodontic instruments are available to achieve these goals. The underlying approaches of root canal treatment include debridement, shaping, and sound filling of the root canal. Unique materials, advanced methods, and modern instruments are being introduced that have revolutionized the clinical practice of endodontics. Endodontic is a major field of dentistry in which practitioners keep on updating their knowledge to cope with the fast-evolving dental practice.
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