exam 2 radiology

Question 1

not used in radiology(high risk of disease transmission)

Answer 1

critical

Question 2

must be sterilized or use disposable devices/barriers(moderate risk of disease transmission)

Answer 2

semicritical

Question 3

do not come in contact with mucous membranes(low risk)

Answer 3

noncritical

Question 4

used on surfaces, sensors, and PID to reduce the disease-producing microorganisms

Answer 4

disinfection

Question 5

total destruction of disease producing microorganisms

Answer 5

sterilization

Question 6

what do you do to film packet prior to dropping the film into the containment cup

Answer 6

remove saliva by swiping the film packet across a disinfectant-soaked paper towel

Question 7

what is lead apron

Answer 7

noncritical

Question 8

what to not touch with contaminated gloves

Answer 8

charts, unwrapped pens, xray cups, lead apron

Question 9

should each film be dried with paper towel after exposure?

Answer 9

yes, minimizes saliva contamination

Question 10

tubehead away from wall means

Answer 10

dirty

Question 11

tubehead close to wall

Answer 11

clean

Question 12

which way to take bitewings

Answer 12

from right to left

Question 13

if xray beam is not perpendicular to the line connecting the buccal surfaces of the teeth, overlap between the ___ surface of one tooth and the _____ surface of the adjacent tooth occurs

Answer 13

buccal; lingual—– incorrect horizontal angulation

Question 14

which side of the film should face the teeth?

Answer 14

the all white side should face the teeth/ring

Question 15

when using stick-on tabs for bitewings, the tabs should be placed on the what side

Answer 15

all white side

Question 16

what is it called when the film is reversed and tire tracks form

Answer 16

herring bone effect

Question 17

caused by inadvertently using the same film to expose two different areas of the mouth

Answer 17

double exposure

Question 18

will slight movement of tubehead affect the images on the film

Answer 18

no

Question 19

excessive film softening is what lines

Answer 19

black lines

Question 20

____ percent of the x ray photons should penetrate through a standardized thickness of a given material depending on KVP

Answer 20

50%

Question 21

if < 70 kvp

Answer 21

50% must pass through 1.5 mm aluminum

Question 22

if > 70 kvp

Answer 22

50% must pass through 2.5 mm aluminum

Question 23

what do you use to test output consistency of x ray machine

Answer 23

step wedge device (place step wedge on fresh film)

Question 24

what is a positive step wedge test

Answer 24

steps dont line up

Question 25

for x ray machines, how many impulses per 1 seconds

Answer 25

60 impulses

Question 26

correct position of tube head when not in use

Answer 26

extension arm folded, tube head and pid aimed at the floor

Question 27

best test to test safelight

Answer 27

coin test

Question 28

what happens if there is an outline when process film with coin test

Answer 28

safelight may not be safe

Question 29

what to do for safelight test

Answer 29

turn off lights and unwrap unexposed dental film place coin on film. turn safelight on process film, if positive exposure--outline-- safelight may not be safe

Question 30

unexposed film is what color

Answer 30

clear and dry

Question 31

exposed film is what color

Answer 31

black and dry

Question 32

screen film contact test tools

Answer 32

meshes for checks of the contact between film and screen of x ray film cassettes

Question 33

fresh film will be

Answer 33

clear with a slight blue tint

Question 34

unfresh film

Answer 34

foggy

Question 35

when developer loses strength, films will

Answer 35

lighten

Question 36

what is the normalizing device called

Answer 36

dental radiographic quality control device

Question 37

fresh fixer clears in how many min

Answer 37

2-3

Question 38

if clearing time of fixer is over 4 minutes-

Answer 38

replace fixer

Question 39

the occlusal plane between the maxillary and mandibular teeth have a distinct upward curve

Answer 39

curve of spee

Question 40

compact and dense bone that lines outisde layers of the maxilla and mandible

Answer 40

cortical bone

Question 41

spongy bone, forms bulk of inner bone

Answer 41

cancellous bone

Question 42

bars or plates of bone; form multitude of various-sized compartments; usually filled with fat, blood, or bone cells

Answer 42

trabeculae

Question 43

hard, cortical bone that lines the alveolus(tooth socket)

Answer 43

lamina dura

Question 44

portion of maxilla and mandible that surrounds and supports the teeth; composed of a base of supporting cancellous bone and lamina dura

Answer 44

alveolar process

Question 45

teeth are attached to lamina dura by fibers of pdl; space in which the pdl lies is often visible radiographically as a thin radiolucent border between lamina dura and roots of teeth

Answer 45

pdl space

Question 46

what makes up the inverted y

Answer 46

max sinus and nasal fossa

Question 47

is acrylic most or least dense

Answer 47

least

Question 48

radiopaque areas are actually where the xrays did___ hit

Answer 48

not

Question 49

extensions of amalgams beyond the crown portion in interproximal area

Answer 49

amalgam overhangs

Question 50

do not cover cusps

Answer 50

inlays

Question 51

cover at least one cusp

Answer 51

onlays

Question 52

prefabricated, not custom-made; temporary restorations; see through margin

Answer 52

stainless steel crowns

Question 53

extends into the pulp canal

Answer 53

post

Question 54

resembles a portion of the crown; will serve as coronal tooth structure so crown can be cemented on it

Answer 54

core

Question 55

where will you generally see all porcelain crowns

Answer 55

on anterior teeth; not as strong as pfm

Question 56

cavity liners that protect the pulp of the tooth; after this a permanent material is placed over this; radiopaque but less dense than amalgam

Answer 56

base materials

Question 57

screws that aid in the retention of an amalgam; metal and opaque; can weaken or fracture a tooth it is trying to help

Answer 57

metallic pins

Question 58

clay like material that fills up the pulp canals; slightly radiopaque

Answer 58

gutta percha

Question 59

metal, more opaque than gutta percha

Answer 59

silver points

Question 60

surgery performed at apical portion of root

Answer 60

apicoectomy

Question 61

base of denture is made of

Answer 61

acrylic

Question 62

teeth of denture is made of

Answer 62

porcelain or acrylic

Question 63

anterior porcelain teeth include retention pins called

Answer 63

diatorics

Question 64

artifacts caused by a radiodense object such as earring

Answer 64

ghost images

Question 65

ghost images appear ___ on the ____ side, and ____ than the real image

Answer 65

larger; opposite; higher

Question 66

in order to determine the location of superimposed dental structures, two radiographs need to be exposed utilizing two different___ angulations

Answer 66

horizontal

Question 67

two different films will be needed to see if the foreign objects are situated ___ or ____

Answer 67

buccally or lingually; buccal object rule

Question 68

if the object on the second radiograph appears to have moved in the same direction as the shift of the tube, then the objects in question is located on the ____ aspect

Answer 68

lingual

Question 69

buccal object rule

Answer 69

slob- same lingual opposite buccal

Question 70

achieved by directing central rays of the x ray beam perpendicularly toward the surface of the image receptor in horizontal plane; directing central rays perp through mean tangent of the embasures between teeth of interest

Answer 70

horizontal angulation

Question 71

achieved by directing the central rays of the x ray beam perpendicularly toward the surface of the image receptor in a vertical plane

Answer 71

vertical angulation

Question 72

all deviations in which the PID is tilted downward to direct the x rays toward the floor; exposure of bw and max PA's

Answer 72

positive vert angulation

Question 73

all deviations in which the PID is tipped upward to direct the xrays toward the ceiling; mandibular PA's

Answer 73

negative vert angulation

Question 74

long biteblock area for the purpose of achieving a parallel relationship between the recording plan of image receptor and long axes of teeth; L shaped backing

Answer 74

paralleling technique

Question 75

metallic restorations

Answer 75

amalgam and gold

Question 76

nonmetallic restorations

Answer 76

porcelain, composite, acrylic

Question 77

bulky amalgams contribute to what kind of disease

Answer 77

periodontal disease

Question 78

post and cores are ___ metal and _____

Answer 78

cast metal and radiopaque

Question 79

post and cores are only placed in _____ treated teeth

Answer 79

endodontically treated teeth