intraoral radiographs anatomy

Question 1

what is Caries seen as on a radiograph? and where is it seen?

Answer 1

radiolucent
pits and fissures, smooth surfaces, interdental, root surface, secondary caries under restorations

Question 2

what are misleading shadows called that can be mistaken for caries?

Answer 2

cervical burnout - Triangular shaped radiolucency at the
neck of the teeth

Question 3

what do restorations show as on a radiograph?

Answer 3

radiopaque

Question 4

what is the Y of Ennis on a radiograph?

Answer 4

nasal cavity floor and the border
of the maxillary sinus

Question 5

what are the upper occlusal radiograph called?

Answer 5

1. Anterior oblique maxillary
2. Lateral oblique maxillary

Question 6

what are the lower occlusal radiograph called?

Answer 6

1.True mandibular occlusal
2. Anterior oblique mandibular

Question 7

what is the aim of taking a radiograph?

Answer 7

to identify the presence or absence of disease
diagnosis
missing teeth
detect caries
detect cysts

Question 8

how would you asses image quality?

Answer 8

overexposure or underexposure
if the receptor is wrong way round

Question 9

To maximise diagnostic benefit from radiographs it can be useful to
remember a few key points when describing an unusual pathology which are?

Answer 9

site of lesion
size of lesion
extent of lesion
surrounding structures
outline of the lesion

Question 10

what are the size of receptors and what type of xray would they be used for? and what colour is the receptor?

Answer 10

size 0- anterior periapical - yellow

size 2 - bitewing
size 2- posterior periapical- green

size 4 -occlusal- blue

Question 11

what is the curve of Wilson?

Answer 11

teeth dont sit on the jaws perfectly

Question 12

what is the match band effect?

Answer 12

Optical illusion caused by the retina
Can be misleading therefore important to consider
the shape of caries vs uniform outlines around fillings

Question 13

Due to the inherent risks of ionising radiation,
all medical exposures must be justified what are Common justifications?

Answer 13

• Assessing for dental caries if it can’t be excluded
  clinically
• Investigating presence of dental infection around
  symptomatic teeth
• Confirming presence of unerupted teeth to aid
  orthodontic planning

Question 14

what is the curve of spee?

Answer 14

a line which as created on the occlusal surfaces of the teeth

Question 15

what is the occlusal plane?

Answer 15

rises as you move distally