Essentials of Dental Radiography 9th Edition By Evelyn Thomson Orlen Johnson-Test Bank

Test Bank For Key Aspects of Dental Radiography 9th Edition By Evelyn Thomson Orlen Johnson

ISBN-10: 0138019398, ISBN-13: 978-0138019396

Chapter 1

Multiple Selection

1. d. Wilhelm Conrad Roentgen stumbled upon the x-ray on November 8, 1895, observing that a fluorescent screen positioned near a Crookes vacuum tube commenced to radiate when an electric current flowed through the tube.
2. b. Howard Riley Raper authored the initial dental radiology guide, Elementary and Dental Radiology, and introduced bitewing radiographs back in 1925.
3. a. William David Coolidge innovated the shockproof hot cathode tube while employed at the General Electric Company in 1913.
4. c. William Herbert Rollins was among the first advocates for radiation hygiene and protection, highlighting the necessity of safeguarding against radiation effects, consequently advancing the sector of radiation protection.
5. d. C. Edmund Kells captured the first dental radiograph on a living individual in the United States. He was a trailblazer in utilizing radiography in dentistry, advocating its diagnostic utility to fellow dentists.
6. a. Given the invisibility of x-rays, researchers working in the radiography domain initially lacked awareness that prolonged exposure could lead to radiation accumulation in the body, posing risks to both patients and radiographers.
7. d. The advent of the Coolidge tube facilitated predetermined and precisely controlled x-ray output.
8. d. Dr. Otto Walkhoff, a German physicist, was the pioneer in capturing a prototype dental radiograph, employing protective measures to prevent light exposure and moisture damage during the time he retained the film in his mouth.
9. c. A rectangular position indicating device (PID) confines the x-ray beam’s size striking the patient to match the actual dimensions of the image receptor.
10. d. The popularity of panoramic radiography surged in the 1960s with the introduction of panoramic x-ray machines.
11. c. Although cone beam volumetric imaging in dental applications results in lower radiation doses compared to conventional CT scans, the dosage remains 4 to 15 times that required for a panoramic radiograph.
12. b. Early film featured emulsion on just one side, necessitating extended exposure durations.
13. c. Pointed cones are currently deemed unsuitable due to x-ray scattering upon contact with such materials.
14. b. The bisecting technique, founded on the rule of isometry, was the initial radiographic method for intraoral radiographs, predating the paralleling technique.
15. a. Given the advancements in the paralleling technique over the older bisecting approach, it has become the preferred method taught in dental assisting, dental hygiene, and dental education establishments.
16. a. In 1907, A. Cieszyński, a Polish engineer, applied the “rule of isometry” to dental radiology, being credited with proposing the bisecting technique.
17. d. Assessing home care is best done through a visual clinical examination to evaluate biofilm presence and gingival tissue condition.

Exposing the radiographer to unnecessary radiation is a result of holding the film in the patient’s mouth.

18. e. Radiography involves the creation of radiographs by exposing and processing x-ray film.
19. d. Dentists have the authority and responsibility in prescribing and diagnosing conditions based on dental radiographs. Dentists, along with dental assistants and dental hygienists, are capable of capturing, processing, mounting, and interpreting (reading) dental radiographs.
20. a. Due to the historical use of cones, many still refer to open cylinders or rectangular tubes as cones.

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