History of X-Rays Discovery

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Questions and Answers

What method is used for capturing images in digital radiography?

Solid-state sensor using CCD (correct)

Scanning and digitizing a film-captured image

Photostimulable phosphor plates (PSP)

Analog image digitization

Which technology uses exposures 50% to 80% less than conventional film?

Digital Computed Radiography (CR) (correct)

Direct Digital Radiography (DR or DDR)

Analog Scanner (X-ray digitizer)

Indirect digital radiographs

What is the purpose of scanning the plate with a laser beam of near-red wavelengths in digital radiography?

To reduce required system power by a factor of 100

To create a latent image

To obtain semi-direct images

To form a digital image (correct)

What component is still needed in every digital radiography system?

X-ray Source Signup and view all the answers

What type of sensors use an active pixel technology to reduce required system power by a factor of 100?

CMOS sensors Signup and view all the answers

Who discovered X-rays in 1895?

Wilhelm Conrad Röentgen Signup and view all the answers

What did Wilhelm Conrad Röentgen initially observe glowing in a darkened room?

Electrical screens Signup and view all the answers

Who is credited with the first practical use of radiographs in dentistry?

Dr. C. Edmund Kells Signup and view all the answers

What was the first radiograph of the human body?

The outline of Wilhelm Conrad Röentgen's wife's bones Signup and view all the answers

Who produced the first recorded dental radiograph by exposing a photographic plate in his own mouth?

Otto Walkoff Signup and view all the answers

What is the main limitation of systems with a field of view in the form of a cone?

They cannot collect information from hidden surfaces Signup and view all the answers

Which digital format is most commonly used in video technology scanners for describing a succession of triangulated surfaces?

STL (standard tessellation language) Signup and view all the answers

What contrast medium is required for the CEREC Bluecam intraoral camera?

Titanium dioxide powder Signup and view all the answers

Which scanner is an evolution of CEREC Bluecam and incorporates videophotometry technology?

CEREC omnicam Signup and view all the answers

What does the CEREC primescan focus mainly on producing as a chairside system?

Inlays, partial and total crowns Signup and view all the answers

What is the first step of the digital workflow in dentistry?

Acquiring a 3D file digitalizing the area of interest from the patient’s mouth Signup and view all the answers

What is the gold standard method for obtaining a reference model in dentistry?

Using a Coordinate Measurement Machine (CMM) Signup and view all the answers

What is the composition of an Intraoral Scanner (IOS) in dentistry?

Handheld intraoral camera plus a computer and software Signup and view all the answers

What are the two types of Intraoral Scanners (IOS)?

Photographic technology and Video technology Signup and view all the answers

Which procedure can be performed directly as part of the digital workflow in dentistry?

Using intraoral scanners for direct digitalization Signup and view all the answers

Study Notes

Digital Radiography

Digital radiography captures images using digital sensors that convert X-rays into electrical signals.
Digital radiography technology uses exposures 50% to 80% less than conventional film.

Digital Radiography Process

A laser beam of near-red wavelengths is used to scan the plate in digital radiography to capture the latent image.
A computer is still needed in every digital radiography system to process the image.

Sensors

Active pixel sensors use an active pixel technology to reduce required system power by a factor of 100.
Active pixel sensors are used in digital radiography.

History of X-rays

Wilhelm Conrad Röentgen discovered X-rays in 1895.
Wilhelm Conrad Röentgen initially observed a glowing fluorescent screen in a darkened room.
Edmund Kells is credited with the first practical use of radiographs in dentistry.
The first radiograph of the human body was taken by Wilhelm Conrad Röentgen.
Dr. Otto Walkhoff produced the first recorded dental radiograph by exposing a photographic plate in his own mouth.

Digital Imaging in Dentistry

The main limitation of systems with a field of view in the form of a cone is that they can only capture a limited area.
The digital format STL (STereoLithography) is commonly used in video technology scanners for describing a succession of triangulated surfaces.

Intraoral Camera Systems

The CEREC Bluecam intraoral camera requires a powder contrast medium.
The CEREC Omnicam is an evolution of CEREC Bluecam and incorporates videophotometry technology.
The CEREC Primescan focuses mainly on producing restorations as a chairside system.

Digital Workflow in Dentistry

The first step of the digital workflow in dentistry is to capture the digital impression.
The gold standard method for obtaining a reference model in dentistry is to use a physical impression.
An Intraoral Scanner (IOS) in dentistry consists of a handheld scanner, a computer, and software.
There are two types of Intraoral Scanners (IOS): active and passive.
The final restoration can be designed and milled directly as part of the digital workflow in dentistry.

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Description

Test your knowledge on the history of X-rays discovery, including the year of discovery, the discoverer, and the subsequent Nobel prize awarded for the discovery.