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  2. Wilkerson dental chair - Wikipedia

    en.wikipedia.org/wiki/Wilkerson_dental_chair

    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 ...

  3. Dental engine - Wikipedia

    en.wikipedia.org/wiki/Dental_engine

    Dental chair integrated with a dental engine Kneebreak dental chair. 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 ...

  4. A-dec - Wikipedia

    en.wikipedia.org/wiki/A-dec

    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.

  5. Chair - Wikipedia

    en.wikipedia.org/wiki/Chair

    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.

  6. List of chairs - Wikipedia

    en.wikipedia.org/wiki/List_of_chairs

    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 ...

  7. Crown lengthening - Wikipedia

    en.wikipedia.org/wiki/Crown_lengthening

    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]

  8. Popliteal height - Wikipedia

    en.wikipedia.org/wiki/Popliteal_height

    For someone seated, the popliteal height is the distance from the underside of the foot to the underside of the thigh at the knees. [1] It is sometimes called the "stool height". (The term "sitting height" is reserved for the height to the top of the head when seated.)

  9. Crown (dental restoration) - Wikipedia

    en.wikipedia.org/wiki/Crown_(dental_restoration)

    Occluso-gingival length or height of the crown preparation affects both resistance and retention. Generally, the taller the preparation, the greater the surface area is. For the crown to be retentive enough, the length of the preparation must be greater than the height formed by the arc of the cast pivoting around a point on the margin on the ...

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