Dental radiography Revision test 1

Question 1

What would be used to protect an xray film from being bent?

Answer 1

Black paper

Question 2

On examination the dentist suspects that the patients’ canines are impacted. which x-ray will the most likely requested you take?

Answer 2

upper standard occlusal

Question 3

A patient attends the dental surgery as they are experiencing pain in the lower right second molar tooth. The dentist suggests using one that is directly connected to the computer. Which type of image receptor would you use?

Answer 3

Charged couple device image receptor

Question 4

Added aluminium filtration removes the soft energy x-rays that are of no benefit to the film. They do this before the x-rays exit the tubehead. Their thickness depends on the kV of the x-ray generating equipment being used. If the x-ray generating equipment being used was above 70 kV what would the thickness of the aluminium filter be?

Answer 4

2.5mm

Question 5

If the x-ray machine is operating at above 60kV what should the focus to skin distance be?

Answer 5

200mm

Question 6

You have just processed a periapical radiograph and you note that the image is coned. What could have caused this film fault?

Answer 6

Positioning of the tubehead

Question 7

A dental x-ray is made up of various shades of grey, how many shades of grey are there from black to white on a dental x-ray?

Answer 7

256

Question 8

What year were the current UK legislation guidelines relating to the Ionising Radiation (Medical Exposure) Regulations published?

Answer 8

2017

Question 9

What is the name of the document that should be kept by the x-ray machine?

Answer 9

Local rules

Question 10

You have just chemically processed a bitewing and the dentist is showing it to the patient. What would provide the optimal viewing conditions?

Answer 10

Viewing box

Question 11

How many hours of radiography and radiology CPD do the GDC recommend that dental nurses carry out in a 5 year cycle?

Answer 11

5 hours

Question 12

You are taking a DPT, what rotates around the back of the patients head?

Answer 12

Tubehead

Question 13

Why would you take a lateral cephalometric radiograph?

Answer 13

To evaluate the facial growth and development

Question 14

You are developing a BW using an automated processor. What is the final compartment that the film passes through?

Answer 14

Water

Question 15

When assessing a digital radiograph, what is the minimum size of a flat screen monitor that should be used?

Answer 15

15”

Question 16

Radiographs are…..

Answer 16

2D representations of 3D objects

Question 17

when taking a radiograph which factor determines beam quality?

Answer 17

Kilovoltage

Question 18

which interaction results in pure absorption?

Answer 18

Photoelectric effect

Question 19

you should be standing at least 2 metres from…?

Answer 19

the tubehead

Question 20

what energy does an incoming xray photon need to eject an inner shell electron?

Answer 20

69.5kV

Question 21

you need to keep ALARP, which component will provide the maximum dose reduction to the patient?

Answer 21

rectangular collimator

Question 22

Inside the tubehead there are various components, which metal helps to remove heat?

Answer 22

Copper

Question 23

you have recently manually processed a BW but is very light- what has cause this?

Answer 23

Insufficient time in developer

Question 24

what is pH of developing solution?

Answer 24

10.5

Question 25

what is the maximum annual dose limit of non-classified workers?

Answer 25

6mSv

Question 26

An atom is made up of a nucleus which contains protons and neutrons surrounded by electrons in specific orbits or shells. Which shell is the of diagnostic importance?

Answer 26

K shell

Question 27

Which biologic effect will definitely happen with a specific high dose of radiation?

Answer 27

deterministic effect

Question 28

what is the atomic number of lead?

Answer 28

82

Question 29

what is Z?

Answer 29

the atomic number