Radiographs Flashcards
what are radiographs
images creating using x ray photons
which molecules are used to produce radiographs
x ray photons
what do the x ray photons interact with after passing through an object
receptors
what does it mean if radiation is transmitted
it passes through the object unaltered
what does it mean if radiation is absorbed
it is stopped by tissue
what does it mean if radiation is scattered
it changes direction
which interactions of x rays with objects contributes to the attenuation of x ray photos
absorption and scattering
what are the three main x ray interactions with matter
transmission
absorption
scattering
label the three lines in correspondence to how x rays interact with objects
green - transmission
red - absorption
yellow - scatteringq
what does a radiographic image represent
the pattern of attenuation of the x ray photons after they have passed through the matter
what is meant by attenuation
reduction of force or amplitude of radiation
what do the shades of gray on radiagraphic images correspond to
the types of tissue that the x rays pass through
what does radiolucent mean
darker areas on an image
less attenuation of the x rays
what does radiopaque mean
these are the lighter areas on the image and means there is more attenuation of the x rays
what means the photons did if there are light areas in the radiographs
that there is more attenuation
what is the main reason for using radiographs
to show the anatomy and pathology that is not visible to the naked eye
what types of tissue are mostly related to the use of radiographs
hard tissues that are mineralised
what is the main cause of using radiographs in dentistry
caries
how does caries appear on radiographs
it results in less radiodensity which leads to the appearance of radiolucence compared to the rest of the tooth
what is a bitewing radiograph used for
intraoral
what is a periapical radiograph used for
intraoral
what is an occlusal radiograph used for
intraoral
what is a panoramic radiograph used for
extra oral
what is a lateral cephalogram used for
extraoral
what is a cone beam computed tomograph used for
cross sectional
bitewing radiograph
periapical radiograph
occlusal radiograph
panoramic radiograph
lateral cephalogram
cone beam computed through for a cross sectional radiograph
what is a bitewing radiograph used for
providing a view of multiple side teeth (premolars and molars)
what does a bitewing radiograph show
crowns
parts of roots
some interdental bone
which factors can affect how many bitewing radiographs are taken per side of the mouth
reason for the radiograph
number of teeth present
reducing overlap between adjacent teeth
what is a periapical radiograph used for
providing a full length view of a particular tooth
what is shown in a periapical radiograph
crown
entire root of the tooth
entire height of bone support around the tooth
how do the sizes of the periapical radiographs differ
between the anterior and posterior teeth
how many dental arches imaged in bitewing radiographs
two
how many dental arches imaged in periapical radiographs
one
what is panoramic radiography used for
zoomed out view of the jaws
what can be shown in panoramic radiography
entire dentition as well as jaws and mid face
how can panoramic radiographs be described
full or sectional
is the resolution on extraoral radiographs better or worse than intra oral radiographs
worse
what are occlusal radiographs used for
providing a view of one dental arch - either maxillary or mandibular
what are the angles that can be used for occlusal radiographs
anterior
lateral
true
oblique
what is the main use of occlusal radiographs
allowing teeth to be seen from different viewpoints
what are cone bean computed tomographs used for
providing a cross sectional imaging of the teeth and jaws
when are cone beam computed tomographs used for
when routine dental imagine cannot provide the required information
what is the most expensive radiograph
cone beam computed tomographs
is the radiation dose of a cone beam computed tomograph higher or lower than the other radiograph types
higher
describe what can be seen on this
35 has a buccal cavity
36 has an occlusal amalgam restoration
37 has a buccal amalgam restoration
what can be seen on this
distal amalgam restoration on 36
what can be seen on this
36 has an MOD amalgam restoration
37 has a buccal and mesioocclusal amalgam restoration
38 has a mesioocclusal composite restoration
how should radiographs be arranged
as if you were facing the patient
the maxillary teeth should be along the top, and mandibular the bottom
right side teeth on the left and vice versa
incisors toward the midline, molars toward the sides
occlusal planes toward the middle
which anatomical features can be used to indicate which teeth are shown
crown morphology
root morphology
curve of spee
surrounding non dental anatomy
what can crown morphology be used for
the shape and number of cusps
what is included in root morphology
the number of roots to indicate the tooth type
which teeth have one root
incisors, canines and some premolars
which teeth have 2 roots
some premolars and mandibular molars
which teeth have three roots
maxillary molars
what is the curve of spee
the normal anatomical curvature of the occlusal plane
curves upward posteriorly
what are some non dental anatomical features of maxillary teeth that can be used for identification
maxillary sinus
nasal cavity
maxillary tuberosity
what are some non dental anatomical features of mandibular teeth that can be used for identification
inferior alveolar canal
mental foramen
inferior border of the mandible
external oblique ridge
where is the mental foramen found
below the premolars
