What Are Dental Burs?
What Are Dental Burs?
Dental burs are an essential part of everyday general dentistry. The rotary instruments, designed for cutting hard tissues such as tooth enamel or bone, come in a range of sizes, shapes, and grits with two or more sharp-edged blades and multiple cutting edges.
Historically used in the preparation of tooth restoration as basic cutting devices, science and technology have driven the development of the ubiquitous bur to new heights, now encompassing an enormous range of options to deliver a variety of dental procedures.
Rapidly robust and of high quality, dental burs are made of steel, stainless steel, tungsten carbide, and diamond grit.
Each bur comes in three parts – the head, the neck, and the shank.
·The head contains the blade that rotates to cut tissue.
·The neck is connected to the head, which contains the cutting blade or the bur.
·The shank is the longest part of the bur piece. It has different ends to attach to different types of handpieces. It is usually classified by its shape – cone, round, or spear. In making the right choice of bur, their unique properties are found in the blade angle and positioning, the shape of the head, and the abrasiveness of the grit.
In essence:·Round Burs – removal of large amounts of tooth decay, cavity preparation, excavating and creating access points and channels for blades re: dental extractions.
·Flat-end Burs – removal of tooth structure, rotary intra-oral tooth preparation, and adjustment.
·Pear Burs – creating an undercut for filling materials, excavating, trimming, and finishing.
·Cross-cut Tapered Fissure – ideal for precise preparations while limiting the build-up of debris, such as in crown work.
·Finishing Burs are used in the completion of restorations.
Like sandpaper, burs come in different grades of coarseness. In essence, the abrasiveness varies to suit different jobs. The harsher the grit, the more tooth surface will be removed. Finer grits are best suited to work that requires finite detail, such as the smoothing of rough edges or around margins.
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