EX2; Intra-oral Radiographic Techniques, Infection Control, and Quality Analysis

Question 1

True or False

The basic technique principles apply for both film and digital intraoral radiographs

Answer 1

True

Question 2

What are the three categories of intraoral radiographs

Answer 2

periapical
bitewing
occlusal

Question 3

How many radiographs and of what kinds does a full mouth series (FMS/FMX) consist of

Answer 3

14-17 periapical

4 bitewings

Question 4

What is that 4 criteria for quality images

Answer 4

adequate diagnostic quality
completely covers area of interest
least amount of magnification and distortion
optimal density and contrast

Question 5

When would you retake a radiograph

Answer 5

only if the required information is not of diagnostic quality

Question 6

What are the two different projection techniques

Answer 6

paralleling

bisecting angle

Question 7

What is the most common projection technique

Answer 7

paralleling; less distortion

Question 8

What is the basis of paralleling technique

Answer 8

the image receptor is parallel to the long axis of the tooth

Question 9

Where is the central ray directed using paralleling technique

Answer 9

at a right angle to image receptor and teeth

Question 10

The X-ray source should be what from the teeth

Answer 10

distant

Question 11

This reduces magnification using the paralleling technique

Answer 11

long source to object distance

Question 12

What device is used to aid the paralleling technique

Answer 12

Rinn positioning device

Question 13

If not using a Rinn, what distance should the end of the cone be in relation to the patients skin

Answer 13

within two centimeters of the patients skin

Question 14

Positioning of the tube head downwards will result in what

Answer 14

positive vertical angulation

Question 15

Positioning of the tube head upwards will result in what

Answer 15

negative vertical angulation

Question 16

Incorrect horizontal angulation of beam will result in what

Answer 16

overlapping of inter proximal surfaces of the crowns

Question 17

What concept is the bisecting angle technique based upon

Answer 17

Cieszynski’s rule of isometry

Question 18

What is Cieszynski’s rule of isometry

Answer 18

two triangles are equal if they share one complete side and have equal angles

Question 19

How is the image receptor placed using bisecting angle technique

Answer 19

it is placed as close as possible to the lingual surfaces of the teeth and palate or lingual surface of the mandible

Question 20

Using the bisecting angle technique, the film and the long axis of teeth form what

Answer 20

an angle at point where the teeth meet the image receptor

Question 21

An imaginary bisector bisects what

Answer 21

the angle where the teeth meet the image receptor

Question 22

The central ray of the X-ray beam is directed at what

Answer 22

a right angle to the imaginary bisector

Question 23

True or False

Performing a radiographic exam is a non-invasive procedure

Answer 23

True

Question 24

What is the barrier protocol for performing a radiographic exam

Answer 24

plastic bags are used for covering chair headrest, x-ray tube head, and exposure switch

Question 25

What color Rinn, film size, and position is used when taking radiographs of maxillary and mandibular anterior teeth

Answer 25

blue Rinn
size 1 film
vertical position

Question 26

What color Rinn, film size, position is used when taking radiographs of maxillary and mandibular posterior teeth

Answer 26

yellow Rinn
size 2 film
horizontal position

Question 27

What is radiograph is the most common retake

Answer 27

premolar bitewing

Question 28

What is included in a bitewing radiograph

Answer 28

crowns
alveolar crests
both mandibular and maxillary

Question 29

What three things are batwings useful in detecting

Answer 29

interproximal caries
marginal periodontal bone loss
interproximal calculus

Question 30

What color Rinn, film size, and position is used when taking bitewings

Answer 30

red Rinn
size 2
horizontal position

Question 31

What are some special circumstances involving radiographs

Answer 31

gag reflex
infection/trauma
mentally/physically disabled
pregnancy
edentulous patients

Question 32

What is the buccal object rule

Answer 32

When determining what is buccal, the object that seems to move opposite of the PID is buccal after two radiographs with changed horizontal angulation

Question 33

What is the “summary” of the buccal object rule

Answer 33

the object that moves in “same” direction is “lingual”

the object that moves in “opposite” direction is “buccal”