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Other levers allowed the chair to rotate ("through the whole circle") and rock back and forth. In addition, minor movements were possible, such as the raising or lowering of the back and headrest, slight rocking of the seat ("to prevent the patient form sliding forward"), footstool length and height adjustment, and the small of the back support ...
A dental engine is a large chair-side appliance (often including the dental chair itself) for use in a dentist's office. American dentist Josiah Flagg created the first adjustable dental chair in the late 18th century, adapting a wooden chair by adding an instrument tray on one side, as well as a movable headrest.
They also opened a new 25,000-square-foot (2,300 m 2) training facility that year in Newberg. [14] This facility doubles as a showroom for visiting dental professionals to view the company's products. [15] The company introduced the A-dec 300, a fully integrated chair and delivery system with a smaller footprint in 2009.
Universal numbering system. This is a dental practitioner view, so tooth number 1, the rear upper tooth on the patient's right, appears on the left of the chart. The Universal Numbering System, sometimes called the "American System", is a dental notation system commonly used in the United States. [1] [2]
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ON Chair, has a patented three-dimensional sitting arrangement; incorporates lateral movement to standard office chair height and reclining positions; Ottoman, a thick cushion used as a seat or a low stool, or as a rest for the feet of a seated person; Ovalia Egg Chair, similar to the Ball Chair but egg-shaped; designed by Henrik Thor-Larsen in ...
Chair, c. 1772, mahogany, covered in modern red morocco leather, height: 97.2 cm, Metropolitan Museum of Art (New York City) A chair is a type of seat, typically designed for one person and consisting of one or more legs, a flat or slightly angled seat and a back-rest.
Suggested characteristics are: 1) 10-20° of occlusal convergence, 2) minimum height of 4 mm for molars and 3 mm for other teeth, 3) a height:width ratio of 0.4 or greater, and 4) proximal line angles should be conserved. When these characteristics are lacking, auxiliary retention (e.g. axial grooves) are needed. [4]
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