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Dental Radiography History
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History of Dental Radiograpghy
Chong L. 2/2/23 NTC
Radiography
Radiograpghy
are images/series of x-radiation images that releases radiation energy and light that passes through the body and forms an image of the structures.
Willhelm Conrad Roentgen
- With that, using a vacuum tube, electrical current, special screens covered with a material that glowed when exposed to radioation, he discovered X-radiation. Naming it X because of the unknown representation that x is used in math.
was a Bavarian physicist that discovered x-radiation on Nov. 8th, 1895.
-The first x-rays were taken of the Roentgen's wifes hand
- He had experimented with cathode rays; which were made from the discharges that emmitted from negative electrode of a tube, that produced a green fluorescent light when it was exposed to radiation.
Discovery
- German Physicist Joham discovered cathode rays.
Without the discovery of cathode rays in 1876 by Joham, english chemists wouldn't have been able to redesign the vacuum tube used in x-radiation images and discover that cathode rays were made of streams of particle.
Joham Wilhelm Hittori
German glass blower;
Henry Geissler built the first vacuum tube in 1883. A vacuum tube is a sealed glass tube that most air was evacuated. This tube plays into the discovery of X-rays.
Vacuum Tube
Dental Radiograghy
- German scientist Otto Walkhoff took the first dental radiography in 1896, 14 days after Roentgens publication of the discovery of X-rays.
-He placed glass photographic plate wrapped with black pepper and rubber in his mouth and submitted himself to 25 minutes of exposure.
Dental Radiograpghy
- W.J Morton, a New York, physician, made the first dental radiograph in the United States, using a skull in April of 1896.
- Edmund Kells, a New Orleans dentist, was the first to use radiographs in dentistry.
- He exposed the first dental radiographs in the United States using a live patient in 1896
- Historically,x-ray packets consisted of glass photographic plates or film cut small pieces and hand wrapped in black pepper and rubber. The first ever prewrapped intraoral films were manufactured in 1913 by Eastman Kodak Company.
1913
- In 1913, William D. Coolidge, an electrical engineer, developed the first hot-cathode ray rube; a high vacuum tube that contained a tungsten filament.
- The x-ray tube is composed of an elevated glass tube containing a cathode
D speed films were produced by Eastman Kodak Co. in 1955. This film is typically used for the bite-wings and falls into the slowest class films.
-It requires longer exposure to radiation
Films 1955
In 1957, variable-kilo voltage machine was introduced
1957
- In 1981, Kodak introduced Ektaspeed (E-speed) film. This was made to reduce the radiation exposure when taking x-rays by 50%.
- Though, this recieved little clinical acceptance because of the poor film qualities.
1981
- This film was modified and an E-speed+ film was introduced and replaced E-speed in 1994.
Eastman Kodak announced introduction of InSight, classified as F-speed introral film in April of 2000.
- This film required 60% less exposure to radiation.