08 Evaluations of radiographs

Question 1

cone cut

Answer 1

partial image, beam not centered over film and film not exposed - appears clear

Question 2

film positioning device

Answer 2

clear line in occlusal plane is bite plate and metal rod

Question 3

molar periapical

Answer 3

up to distal of second premolar, 3 molars worth of bone visible, open contacts, all cusps in same plane, periapical bone

Question 4

premolar periapical

Answer 4

distal of canine visible, periapical bone, open contacts, level occlusal plane

Question 5

canine periapical

Answer 5

canine centered, periapical bone, no elongation

Question 6

maxillary central periapical

Answer 6

mesial of laterals included, adequate bone visible, open contacts

Question 7

mandibular central periapical

Answer 7

all mandibular incisors included, adequate bone

Question 8

vertical angulation error

Answer 8

elongation or foreshortening of teeth, cusps not in same plane

Question 9

horizontal angulation error

Answer 9

overlapping contact, occlusal plane tilted

Question 10

pressure mark

Answer 10

thin curved radiolucency from handling error

Question 11

molar bitewing

Answer 11

all molars to distal of second premolars, open contacts, approx. equal amounts of teeth visible

Question 12

premolar bitewing

Answer 12

to distal of canines, equal distribution of teeth, open contacts