DENT 1050 Test study; ch. 10, 12, 13, 14, 15, 17, 25, 26 Flashcards Preview

Dental Radiography > DENT 1050 Test study; ch. 10, 12, 13, 14, 15, 17, 25, 26 > Flashcards

Flashcards in DENT 1050 Test study; ch. 10, 12, 13, 14, 15, 17, 25, 26 Deck (32):
1

How do you check the quality of the developer?

The best way to check the strength of the developer, is to compare film densities to a standard:
*Reference Radiograph: one that is processed under ideal conditions & used to compare densities to daily radiographs
*View reference radiograph and the daily radiographs side by side

2

What do films look like in regards to developer solution?

*If the density of the daily radiograph appears lighter the developer solution is either weak or cold. If the density appears darker the developer solution is either too concentrated or too warm

3

What tests are involved in regards to developer solution?

*Stepwedge Radiographs: expose 20 films w/stepwedge on top of them, use one standard and store 19, each day expose one of 19 after chemicals replenished, view by the one standard - unmatched means developer solution is depleted

*Normalizing device: commercial monitoring device

4

Patient records

The dentist 'owns' the radiographs and should keep them indefinitely; patient can access and copies should be forwarded directly to dentist

5

Malpractice

negligence, same standard of care, statute of limitations

*statute: time period that a patient may bring a malpractice action against a dentist/auxiliary; may be years down the road, often when patient sees another DDS

6

Informed/uniformed consent

*prior to receiving treatment, patient should be made aware of various aspects of treatment, as well as effects of receiving no treatment and must give their consent

*Lack of informed consent:
-complete lack
-no legal right to give it (minor or incompetent)
-under influence of alcohol or drugs
-misrepresented info, fraud
-under duress
-incomplete disclosure

7

Liability

dental auxiliaries are legally liable for their own actions, but the supervising dentist is also liable

8

Sterilization

Destroys ALL pathogens

9

Define disinfection

Inhibits or destroys pathogens

10

Instruments that are critical and noncritical in regards to disinfection.

Critical: used to penetrate soft tissue or bone
Semi-critical: contact but do not penetrate
Noncritical: do not come in contact w/mucous membranes

Critical:sterilize
Semi:sterilize (ie film holding devices)
Non:low level infection techniques, LYSOL SPRAY

11

Digital x-rays

Pixel is digital equivalent of a silver halide crystal; more pixels -> higher resolution, sharper image

12

Focal; Field of view

area that can be captured when performing imaging procedures; cone-shaped or fan-shaped; small, medium and large; area of interest in the patient's anatomy

13

Parallel technique

extension cone paralleling (XCP); film parallel to long axis of tooth, central ray perp to film and tooth, film holder must be used, film away from tooth and toward midline, increased obj-to-film distance to stay parallel; "Dot in the slot"

14

Advantages of parallel technique.

little to no dimensional distortion, accuracy, simplicity, duplication (easy to standardize), less exposure to thyroid gland, pt position not critical w/holders

15

Disadvantages of parallel technique.

film placement (esp children and small mouth or shallow palates), patient discomfort

16

What is parallel technique used for?

to have image correct on film; accuracy: the image is representative of the actual tooth

17

What causes magnification during parallel technique?

increased obj-to-film distance results in image magnification and loss of definition;

increased target-to-film distance results in less image magnification and increased definition

18

Misc question 1

although dentist 'owns' originals, patient may request copies of radiographs or view them upon request (forward directly to dentist)

19

Self-determination

patient has the legal right to make choices about their treatment

20

Disclosure

the process of informing the patient of all aspects to treatment

21

Ownership/retention

The dentist 'owns' the radiographs and should keep them indefinitely; patient can access and copies should be forwarded directly to dentist

22

Negative (-)

when the PID is positioned below the occlusal plane and the central ray is directed upward

23

Molar bitewing

center second molar

24

Premolar bitewing

center second premolar

25

Digital subtraction

reversing the gray-scale, making what was radiolucent radiopaque and vice versa

26

Digitize

to convert and image into digital form so a computer can process it

27

Sensor

the detector that captures the radiation/light to form the image (like film)

28

Radiation exposure

The typical sensor is more sensitive to x-rays than conventional film and requires 50-80% (almost 90%) less radiation exposure than F-speed film

29

Computer

serves as processor, storage unit and view box of digital films

30

Types of digital imaging

Direct digital imaging: used in clinic
Indirect digital imaging: existing x-ray digitized
Storage phosphor imaging: wireless system

31

DICOM data

universal format for handling, storing, transferring
3D images.
acronym: Digital Imaging and Communications in Medicine

32

Voxel

smallest element of a three-dimensional image; also referred to as volume element or three-dimensional pixel