One of the mechanical tools that sees the most action in a dental practice is the bur, sometimes known as a burr. It is critical to the therapeutic outcome that the appropriate bur be chosen, both in terms of its size and its kind.
Burs A bur may be broken down into three distinct components: the head, the neck, and the shank. Handpiece burs are typically constructed of tungsten carbide, however diamond particle coatings might possibly be utilized in their production instead. Handpieces are employed in the dental industry. The type of the treatment determines the degree to which the coating is rough, which may range from smooth to quite rough. There has been a recent shift toward the use of ceramic and zirconia burs. Ceramic burs are often used in restorative dentistry operations because to their effectiveness in removing cavities.
There is a vast variety of sizes and configurations available, and the clinician will choose the bur based on the patient’s preferences, the kind of treatment being performed, and the bur’s efficiency in the specific clinical environment being addressed. When eliminating dental hard tissues in a way that is both safe and effective, selecting the bur that is most suited for the job is essential. By selecting the appropriate type of bur, not only is the clinician able to improve their own ergonomics, but the patient also experiences less discomfort.
Burs made of Tungsten Carbide with Diamond Coating
In order to achieve the appropriate cutting action, tungsten carbide burs have heads that are fashioned like blades. These slicing qualities are affected differently depending on the degree of angling and location of the blade. The following is a list of some of these characteristics:
- A bur that has an angle that is more obtuse will generate a rake angle that is in the negative, which will increase the bur’s durability and its overall strength.
- Burs with more acute angles produce positive rake angles, which results in faster cutting; however, this also causes the bur to become blunt faster.
- The effectiveness of the cut can be improved by performing crosscuts or additional cuts across the blades. Because there is less buildup of debris, crosscut burs are more efficient.
- Burs have specific flute angles and cutting characteristics that are designed for the individual tasks they are used for.
- Cavity preparation burs have flutes that are both wider and deeper, which allows them to cut through enamel more quickly and efficiently.
- The blades of operative burs can be crosscut or straight, and they cut more slowly but more smoothly than their crosscut counterparts.
- Diamond-coated burs may be used to generate a smooth form, with the amount of smoothness attained being dependent on the kind of diamond coating used for the bur (fine, medium, or coarse).
The shape of the bur is determined by the clinician’s preference as well as the treatment that the patient needs. There are many different configurations, such as round, pear-shaped, tapered fissures, and inverted cones. There is a wide range of sizing and diameter options available for each of these. When used in a conventional air-driven handpiece, plain, crosscut, and flat fissure tungsten carbide burs all have the same amount of cutting force. This indicates that the shape of the bur does not appear to have an effect on the amount of cutting power it possesses.
Restorative burs that are more specialized are used for specific tasks. One example of this type of restorative bur is the depth-cutting bur, which has horizontal ridges against the diamond fissures Carbide Burs to guide the depth of the cut. When shaping the floor of mesial and distal tooth preparations for Class II cavities that have smooth sides, end-cutting burs are the tools of choice to use. These burs lessen the likelihood of the cutting surface of the bur touching the surface of the tooth next to the one being worked on. You can also use end-cutting burs to shape the pulpal floor of Class I and II cavities. This will allow you to avoid the risk of the cutting surface of the bur coming into contact with the prepared cavity walls.
Burs made of tungsten carbide have only been developed relatively recently. When compared to a crosscut bur, these burs have a geometry that is all their own thanks to the sharper dentations that they feature. Tungsten carbide burs cut through enamel, amalgam, composite, and metals more swiftly and effectively, all while causing less vibration than other types of burs. Because less pressure is required to start and finish a cut with these burs, the design of the burs helps to reduce the stress that is placed on the tooth and the periodontal tissues that are located nearby. Cutting produces less heat and more accurate results than other methods. In a similar vein, fine crosscut tungsten carbide burs are appropriate for all forms of restorative dentistry and are capable of completing multiple tasks simultaneously. This helps save time during procedures because it eliminates the need to switch burs.