Dental burs are dentists who grind and drill teeth in clinical practice, and dental technicians grind and use rotating tools to trim dentures.
1. The composition of dental burs:
The dental bur is composed of a working part and a handle.
2. Classification of dental burs
1. Divided by purpose: dental burs are divided into clinical burs for dentists and burs for dental technicians.
2. Divided by material: Dental burs are divided into steel burs, tungsten steel burs, emery burs, and ceramic burs.
3. Divided by rotation speed: Divided into high-speed dental burs and low-speed dental burs.
4. According to the shape of the working part: the commonly used are ball drills, split drills, inverted cone drills, ball head split drills (broken crown burs), and wheel drills.
5. According to the tooth shape of the working part: flat blade, serrated blade (file-shaped pattern).
3. High-speed dental needles and body fluids that are used for short entry into contact with blood and body tissues belong to the scope of supervision of second-class medical devices and need to be reported to the relevant national registration department; low-speed dental vehicles are strictly supervised by first-class medical devices.
4. The basic standards of dental burs: standard high-speed dental burs have a total length of 19 mm and a stem diameter of 1.6 mm; standard low-speed bending machine needles are 22 mm long and a stem thickness of 2.35 mm; standard low-speed straight shanks have a diameter of 44 mm. 2.35 mm diameter
5. High-speed dental drills are made of steel or tungsten steel. Due to the strength of low-hardness steel and easy machining precision, there are also some steel high-speed dental car top cities. Now the market is mainly tungsten steel high-speed dental drills.
With diamond burs and tungsten steel needles, foreign dentists mainly use cemented carbide drills and rarely use high-speed drills.
Car tungsten steel needles are gear cutting or restoration, the cutting surface is smooth, and the cutting edge is sharp without scratches; tungsten steel has high hardness, sharpness, durability, high cutting efficiency and cutting quality.
Diamond auger grinds teeth with hard emery abrasive grains or repairs, polishes the scratches on the surface; emery abrasive grains are attached to the stainless steel substrate and are ground off with emery abrasive grains. The sharpness, long service life and grinding efficiency are not high, and the quality is not high.
Tungsten steel burs mainly rely on imports. Tool manufacturers produce only a small number of dental tungsten steel needles in accordance with industry standards. Now there are several car manufacturers with high technology and precision CNC machine tools for dental tungsten steel needles. In the future, domestic dentists will use more high-quality domestic tungsten steel dental burs.
