Radiology Exam 4

Question 1

Why is the bisecting technique less likely to produce superior diagnostic quality radiographs?

Answer 1

Because it satisfies fewer shadow cast principles

Question 2

When is the bisecting technique used?

Answer 2

When something in oral prevents us from being able to use the paralleling technique

Question 3

How is the angle formed when using the bisecting technique?

Answer 3

Formed by the long axis of the tooth and the plane of the image receptor must be bisected

Question 4

After visualizing the two planes in the bisecting technique, a third line is imagined and that is called the______

Answer 4

bisector

Question 5

The central x-ray beam is directed ______to the imaginary bisector.

Answer 5

perpendicular

Question 6

The long axis of the tooth and the plane of the image receptor are NOT______

Answer 6

parallel

Question 7

When using the bisecting technique, you need a shorter_____-image receptor distance.

Answer 7

target

Question 8

What size PID is preferred for using the bisecting technique?

Answer 8

8 inch

Question 9

Although the central beam is normally directed perpendicular to the imaginary bisector, in mandibular regions, it is more of a ______technique due to the position of the teeth.

Answer 9

parallel

Question 10

What type of receptor holders are appropriate when using the bisecting technique?

Answer 10

short biteblock
snap a ray
wing a ray

Question 11

Can L shaped receptor holders be used when doing the bisecting technique?

Answer 11

no

Question 12

Where should patients bite on the receptor when using the bisecting technique?

Answer 12

Patients should bite on the bite block as close to the teeth as possible

Question 13

How is correct vertical angulation determined?

Answer 13

By imagining the bisector

Question 14

How is correct horizontal angulation determined when using the bisecting technique?

Answer 14

Using teeth contact points and image receptor. Aim the central ray directly through the contacts of the teeth you are imaging.

Question 15

What is the recommended angulation for the bisecting technique on canines?

Answer 15

+45 to +55 maxillary

-20 to -30 mandibular

Question 16

What is the recommended angulation for the bisecting technique on incisors?

Answer 16

+40 to +50 maxillary

-15 to -25 mandibular

Question 17

What is the recommended angulation for the bisecting technique on premolars?

Answer 17

+30 to +40 maxillary

-10 to -15 mandibular

Question 18

What is the recommended angulation for the bisecting technique on molars?

Answer 18

+20 to +30 maxillary

-5 to 0 mandibular

Question 19

How is proper horizontal angulation achieved when using the bisecting technique?

Answer 19

Image receptor must be parallel to the interproximal space or embrasure space of 2 determined teeth, same as paralleling technique.

Question 20

What happens when an image is foreshortened and what do we need to do to fix this?

Answer 20

there is too much vertical angulation so we need to decrease angulation.

Question 21

What happens when an image is elongated?

Answer 21

there is not enough vertical angulation so angulation needs to be increased.

Question 22

What must be done to prevent a cone cut when using the bisecting technique?

Answer 22

receptor must be centered within the x-ray beam to avoid cone cut error. BEAM MUST BE CENTERED OVER THE RECEPTOR

Question 23

How must the patient be seated when using the bisecting technique?

Answer 23

Occlusal plane must be parallel to the floor.

Question 24

Because the images are never that pretty when using the bisecting techniuqe, why would you do it?

Answer 24

This technique is used when you can’t achieve the parallel relationship

Question 25

What type of bite block is needed for the bisecting technique?

Answer 25

short bite block NOT L SHAPED

Question 26

What is the purpose of a Lateral Cephalometric Projection?

Answer 26

To evaluate facial growth and development, trauma, disease and developmental abnormalities

Question 27

What is the purpose for a posteroanterior projection?

Answer 27

to evaluate facial growth and development, trauma, and disease and developmental abnormalities.

Question 28

What is the purpose of the waters projection?

Answer 28

to evaluate the maxillary sinus area

Question 29

What is the proper receptor placement and head position when taking a waters projection?

Answer 29

The receptor is perpendicular to the floor and the chin touches the receptor, the tip of the nose is .5 to 1 inch from receptor.

Question 30

What is the submentovertex projection?

Answer 30

it is an image used to identify the position of the condyles, the base of the skull and evaluate the fractures of the zygomatic arch

Question 31

What is the purpose of the reverse towne projection?

Answer 31

To identify fractures of the condylar neck and ramus area

Question 32

Where is the receptor placed when doing the reverse town projection and what is the head position?

Answer 32

The top of the forehead touches the receptor. The receptor and the midsagittal plane is perpendicular to the floor and the head is tipped down with the mouth opened as wide as possible.

Question 33

Interpersonal skills promote good relationships between individuals and build a good____

Answer 33

rapport

Question 34

What is the process by which information is exchanged between two or more persons?

Answer 34

communication

Question 35

Listening requires a great deal of self control and ____

Answer 35

concentration

Question 36

What are the two types of communication skills?

Answer 36

verbal and nonverbal

Question 37

What are facilitation skills?

Answer 37

interpersonal skills that are used to ease communication and develop a trusting relationship between the dental professional and the patient.

Question 38

Encouraging questions Answering questions Responding with action and expressing warmth are all examples of

Answer 38

facilitation skills

Question 39

What is the relationship between the patient and the dental professional known as?

Answer 39

patient relations and affects the first impression, chairside manner and attitude

Question 40

Who does the first impression of the dental team usually involve?

Answer 40

the dental auxiliary

Question 41

The way a dental professional conducts himself or herself at the patients chairside is known as___

Answer 41

chairside manner

Question 42

Why is patient education on radiology critical?

Answer 42

Because many patients don't understand the importance of dental images and patients that are more educated are more likely to realize the benefits of dental images

Question 43

What are 3 different methods of patient education?

Answer 43

oral presentation printed literature a combo of both

Question 44

What are things about radiology that patients frequently ask questions about?

Answer 44

necessity, exposure, safety, digital and miscellaneous questions

Question 45

What is the strong involuntary effort to vomit?

Answer 45

gagging

Question 46

Retching that is elicited by stimulation of the sensitive tissues of the soft palate region is known as a

Answer 46

gag reflex

Question 47

What areas are most likely to elicit the gag reflex?

Answer 47

soft palate and lateral posterior third of the tongue

Question 48

What are the two precipitating factors for the initiation of the gag reflex?

Answer 48

``` psychogenic stimuli (originates in the mind) tactile stimuli (originating from touch) ```

Question 49

Every effort should be made to limit the amount of time that a receptor remains in the ______.

Answer 49

mouth

Question 50

When taking x-rays, we can potentially avoid stimulating the gag reflex by starting with_____

Answer 50

anterior exposures

Question 51

Which molar receptor should be placed first to avoid the gag reflex?

Answer 51

premolar before the molar

Question 52

Which receptor is the most likely to elicit the gag reflex?

Answer 52

maxillary molar

Question 53

How can we avoid the palate when taking x-rays?

Answer 53

Avoid sliding the receptor along the palate, firmly bring the receptor into contact with palatal tissues using one decisive motion.

Question 54

How do we demonstrate receptor placement?

Answer 54

by rubbing a finger along the tissues near the intended area of receptor placement, and telling the patient, "this is where the receptor will be positioned."

Question 55

What images must be used in the event that the gag reflex is uncontrollable?

Answer 55

extraoral images such as panoramic or lateral jaw images

Question 56

``` Which of the following would not be a good idea when trying to prevent a patient from gagging? Saying, "this may make you gag" reassuring the patient distracting the patient suggesting breathing reducing tactile stimuli using a topical anesthetic ```

Answer 56

Saying, "this may make you gag"

Question 57

A physical or mental impairment that substantially limites one or more of an individuals major life activities is known as a_____

Answer 57

disability

Question 58

We must communicate with clear verbal explanations especially when the patient has a_____

Answer 58

vision impairment

Question 59

Ask the patient how they prefer communication and ask the caregiver to server as an interpreter when the patient has a____

Answer 59

hearing impairment

Question 60

Ask whether the patient needs assistance when there is a ____

Answer 60

mobility impairment

Question 61

What is a substantial impairment of mental of physical functioning that occurs before the age of and is of indefinite duration and may also cause problems with coordination or comprehension of instructions?

Answer 61

developmental disabilites

Question 62

When prescribing dental images for children, it depends not only on the individual needs of the child but also on the ______of the child and their ability to cooperate with the procedures.

Answer 62

age

Question 63

An imaging examination that includes all of the tooth-bearing areas is recommended at the_________stage, after the first______has erupted.

Answer 63

early mixed dentition/ first permanent molar

Question 64

What sensors are preferred in pediatric dentistry?

Answer 64

wireless sensors are preferred over wired sensors in pedo

Question 65

What technique is recommended when taking endo x-ray images?

Answer 65

paralleling

Question 66

What are reasons we would want to obtain an image for an edentulous patient?

Answer 66

root tips, impacted teeth, lesions, objects in bone, normal landmarks relative to the crest of the alveolar bone, observing the quantity and quality of bone that is present.

Question 67

What is the most common way to evaluate an edentulous jaw?

Answer 67

panoramic examination

Question 68

When would we use an periapical exam on an edentulous patient?

Answer 68

If a pano machine is not available | as a follow up to the pano exam