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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 ...
In subsequent years, the company added chairs, stools and dental lights, becoming a full service provider in the 1980s with revenues of $75 million annually by 1990. [7] They developed a dental cabinetry line in 1983 as well as building the self-contained water system, allowing dentists to have a controlled water supply to handpieces, and ...
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]
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.
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.
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