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As the speed of a handpiece increases, its torque subsequently decreases (slow-speed handpieces have high torque, whereas high-speed handpieces, like the air turbine system, have a low torque) The free running speed of 1:5 gear ratio electric handpiece is the same as its cutting speed; thus, 40,000 motor speed x 5 = 200,000 rpm burr speed.
A Lentulo spiral. The notches at left allow it to fit into a slow-speed latch handpiece. A Lentulo spiral is a dental instrument used to properly distribute root canal sealer and cement evenly throughout the root canal system, as when performing endodontic therapy or a post and core cementation.
For instance, a latch type, or right angle bur, is only used in the slow-speed handpiece with contra-angle attachment. A long shank or shaft is only used in slow speed when the contra-angle is not in use, and finally, a friction grip bur, which is a small bur, is used only in the high-speed handpiece.
Miscellaneous endodontic instruments. From left: Lentulo spiral, reamer, K-file and H-file. Hand files can provide tactile sensation when cleaning or shaping root canals. This allows the dentist to feel changes in resistance or angulation, which can help determine curvature, calcification and/or changes in anatomy, in which two dimensional radiographs may not always identif
Dental vibration appliances are devices that aim to speed up the process of straightening teeth or correcting a person's bite during orthodontic treatment. The goal is to reduce the time it often takes to move teeth safely and also reduce the risk of side effects such as problems with normal tooth mineralization and inflammatory root resorption. [1]
Within the last century, Alfred Fones, the founder of dental hygiene, began educating students on coronal tooth polishing. Prior to the 1970s tooth polishing was provided to all patients as part of their complete care. As of the 1990s to 2000s, evidence suggests that full mouth polishing is not always necessary.
Midwest Dental Care was founded in 1968 by David Hehli with the opening of his first clinic in Mondovi, Wisconsin. He eventually grew his practice to several dental offices throughout Wisconsin. Midwest Dental became the largest solely owned dental practice in the country at that time. Hehli died on July 16, 2020, at the age of 77. [1]
The turbine's excellent power transmission meant that the idle mode speed could be reduced to 300,000 rpm. 2001: W&H developed an implantology motor for absolute precision in dental implants. 2007: The new Synea generation included the first turbines in the history of dentistry to be fitted with sterilizable LEDs. In order to make the benefits ...
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