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The superelasticity allows an increase in taper (between 4–8%) compared to stainless steel. This allows an adequate taper of the root canal which takes less time to prepare than with stainless steel and less files needed. The super elasticity also means the risk of zipping and apical transportation is reduced.
Stainless steel is used in a variety of applications in dentistry. It is common to use stainless steel in many instruments that need to be sterilized, such as needles, [42] endodontic files in root canal therapy, metal posts in root canal-treated teeth, temporary crowns and crowns for deciduous teeth, and arch wires and brackets in orthodontics ...
Nickel titanium rotary file used in dentistry. A nickel titanium rotary file is an engine-driven tapered and pointed endodontic instrument made of nickel titanium alloy with cutting edges used to mechanically shape and prepare the root canals during endodontic therapy or to remove the root canal obturating material while performing retreatment.
Barbed broaches are made from stainless steel with a plastic handle and tapered, round, soft iron wires, and the smooth surface is notched to form barbs. These barbs are designed to entangle the tissue so it can be removed intact from the canal wall. [2] Shorter barbed broaches were also used as of the early 1900s to file down canal walls. [3]
The risk of endodontic files fracturing can be minimised by: [43] Ensuring access cavity allows straight-line introduction of files into canals; Creating a glide path before use of larger taper NiTi files; Using rotary instruments at the manufacturer's recommended speed and torque setting; Adopting a single-use file policy to prevent overuse of ...
Harmeet D. Walia was an American endodontist and inventor.He introduced the use of nickel titanium shape memory alloy for the manufacture of root canal files, which had traditionally been made of carbon or stainless steel.
These SMA wires do not need to be retightened as often as other wires because they can contract as the teeth move unlike conventional stainless steel wires. Additionally, nitinol can be used in endodontics, where nitinol files are used to clean and shape the root canals during the root canal procedure. Because of the high fatigue tolerance and ...
The stainless steel crowns are selected by tooth type, location and size (see image 2). The tooth will be measured to identify the most suitable size of stainless steel crown. [ 26 ] The clinician will try the stainless steel crown prior to its cementation, to ensure that it fits correctly, and establish if an alternative size or contouring of ...
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