Radiographs

Question 1

What are they?

Answer 1

dental images taken of oral structure + provide insight into teeth + jaw bone that would otherwise be inaccessible to dentist. They also assist in diagnosis + trt planning

Question 2

Hard tissue pathology

Answer 2

Teeth, jaw bones, facial bones

Question 3

Soft tissue pathology

Answer 3

abscesses, cysts, tumors

Question 4

Presence or absence of

Answer 4

unerupted teeth

Question 5

Skeletal classification

Answer 5

for orthodontic assessment + trt planning

Question 6

Latrogenic problems

Answer 6

overhanging restorations, residual caries, perforated root canals.

Question 7

Intra-oral views

Answer 7

• Horizontal bite wing for routine assessment of posterior teeth
• vertical bitewing for assessment of posterior bone levels
• periapical for assessment of individual teeth
• anterior occlusal for assessment of anterior areas of maxilla or mandible

Question 8

Extra-oral views

Answer 8

• dental pantomograph for: third molar assessment, orthodontic assessment, periodontal assessment, jaw pathology
• Lateral skull view for orthodontic assessment + jaw measurement
• Lateral oblique for lower third molar assessment

Question 9

Dental caries

Answer 9

shows up as a dark area of destruction extending inwards from the enamel surface

Question 10

Presence + extent of periodontal disease

Answer 10

shows up as a loss of the lamina dura forming the crest of the alveolar bone, loss of height of the alveolar bone + widening of the periodontal ligament space

Question 11

Periodontal + periapical abscesses

Answer 11

chronic alveolar abscesses show up as dark circular area at apex of affected tooth, caused by destruction of apical lamina dura + spongy bone

Question 12

Cysts

Answer 12

show up as enlarged darker areas surrounding other structures, sometimes pushing tooth roots out of their normal positions

Question 13

Horizontal bite-wing (intra)

Answer 13

show posterior teeth in occlusion to view:
inter proximal areas and diagnose caries in these regions
restoration overhangs in these areas
recurrent caries beneath restorations
occlusal caries

Question 14

Vertical bitewing (intra)

Answer 14

show extended view of posterior teeth from mid root of uppers to mirror of the lowers to view;
periodontal bone levels
true periodontal pockets

Question 15

Periapical (intra)

Answer 15

show one or two teeth in full length with surrounding bone taken to view area and the teeth in close detail

Question 16

Anterior occlusal (intra)

Answer 16

show plane view of anterior section of either upper or lower and are used to especially view area or unerupted teeth, supernumerary teeth and cysts

Question 17

Dental panoramic tomography (DPT) (extra)

Answer 17

shows both jaws in full + their surrounding bone anatomy, for orthodontic, wisdom tooth assessment and help diagnose pathology + jaw fractures

Question 18

Lateral oblique (extra)

Answer 18

shows posterior portion of one side of the mandible including ramus and angle and lower molar teeth. Alternative to DPT to view position of unerupted third molar teeth

Question 19

Lateral skull (extra)

Answer 19

view of the side of the head taken in specialist machine called cephalostat (may be presented as attachment of dpt machine or stand alone) and used to monitor jaw growth + determine orthographic surgery techniques in complicated cases of malocclusion