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Views: 5 Author: Site Editor Publish Time: 2020-08-06 Origin: Site
Despite the long history of the treatment of periapical periodontal disease, root canal therapy is one of the youngest professional disciplines in dentistry.
The development process of root canal therapy
New development
Development and classification of Niti taper file
Endodontic file classification and use
Grossman divided the 200-year history of root canal therapy from 1776 to 1976 into four stages:
1776-1826: Leech treats abscess teeth, burns the pulp with burning red wire, and fills the root canal with gold foil.
1826-1876: General anesthesia, rubber barriers, the emergence of tooth gum tips, the production of primitive medullary needles and root canal files, arsenic used to kill the pulp.
1876-1926: Invention of X-ray, application of local anesthesia, application of endodontic disinfection (CMCP).
1926-1976: X-ray, gradual improvement of local anesthesia and root canal treatment. Ca(OH)2EDTA preparation is widely used, and the application of arsenic and silver needle is gradually reduced.
Since 1976, with more than 20 years of development, root canal treatment technology has made significant progress:
1.Microscopic root canal treatment and micro apical surgery.
2. Mechanical nickel-titanium rotating root canal preparation equipment: such as ProfileProtaper, etc.
Hot tooth gum vertical compression technology: such as obturaⅡ, ultrafil3D, Thermafil, etc.; step-down method and crown-down preparation method (crown-down) application.
3. Application of new materials for root canal repair such as MTA.
4. The accurate measurement technique of root canal length such as digital X-ray imaging, the popular application of root canal length measuring instrument.
5. Ultrasonic root canal treatment techniques such as: removal of foreign bodies, treatment of calcified root canals, apical surgery, root canal washing, etc.
6. Application of Ca(OH) 2 root canal sealant.
A leap-forward development of root canal therapy began in the early 1960s. WF Buehler discovered that Niti file after a heat treatment process adjusted in a specific temperature range always reflects the memory effect, and it is restored to deformation after removing the applied load. The superelastic NiTinol of the previous form. There are dozens of Ni-Ti files produced recently. So when and how do we use which Ni-Ti file is better? For example, in the case of root canal narrow maxillary molars MB1, MB2, DB or mandibular molars MB, ML, DL, it is necessary to consider what kind of NiTi file, what Taper to choose, and how much Apical Size. We believe that understanding the basic characteristics of all NiTi files will be somewhat helpful when making choices.
It is mainly used in medical dentistry. It is commonly used in medical dentistry. K files and H files are commonly used. They generally start from the 15th to the zhi40th. When the K file is generally lifted, the H file can enter slowly without rotating more than 180 degrees.
The specification of the fitter file refers to the length of the file.
The specifications of shaped files and plastic files refer to the full length of the file.
The fitter files the file body (the distance from the tip of the file to the shoulder of the file). Length indicates that there are several specifications of 100-150mm, 200-300mm, 350-450mm.
The full length of the profile file and plastic file is the size. The basic size of the file mainly includes width and thickness. For round files, the diameter.
The K file is called a round file, and there are three kinds of root canal files. The Kfile has a K-shaped structure similar to an enlarged needle, a twist-shaped drill bit, a diamond-shaped cross-section, four blades, the blades are arranged in a spiral, the groove is narrow, and the shallow The root canal wall filed is very smooth, the other two files, although you did not ask, but I will introduce it to you. The H file is called a rough file. The blade at the working end is circled around the needle shaft, and the groove of each blade changes from shallow to deep from the top to the tip. The shape is like a pyramid, this structure has a strong cutting effect. The R-shaped file, called rat tail file, is characterized in that the blade is not continuous, but has inverted tooth-like protrusions. This inverted tooth is also hovering around the long axis. The R file has a very sharp blade and a high cutting efficiency. But the filed wall is not smooth. The root canal file is often used in conjunction with the expansion needle to achieve the purpose of expanding the lumen and filing the wall of the tube. Clinically, the root canal file has 6 numbers. It should be selected from small to large when used.
If you want to buy endodontic file, please contact OSAKADENTAL.
