head radiography

Question 1

what patient preparation is needed for equine head radiography

Answer 1

usually heavy sedation required
head collar removed

Question 2

where is the radiography plate positioned when taking dorso-ventral view of maxillary incisors

Answer 2

in the mouth
place a gag through cheek teeth to prevent it being bitten

Question 3

with dorso-ventral view of maxillary incisors which teeth can be seen

Answer 3

101-103
201-203

Question 4

with ventro-dorsal view of mandibular incisors which teeth can be seen

Answer 4

301-303
401-403

Question 5

List the views needed to look at the cheek teeth

Answer 5

latero-lateral
dorso-ventral
obliques

Question 6

List 3 things you can look at to check if latero-lateral view of cheek teeth is good

Answer 6

nasal incisor notches are lined up
can see the roots of the 6 cheek teeth
can see the sinuses

Question 7

what is a disadvantage of latero-lateral radiographic view of cheek teeth

Answer 7

cheek teeth are superimposed on each other

Question 8

what does dorso-ventral view of cheek teeth show

Answer 8

allows us to see nasal septum- nasal to be perfectly straight for this

Question 9

what oblique view is used to see the tooth roots of maxillary cheek teeth

Answer 9

latero 30°dorsal-lateroventral oblique view

Question 10

what oblique view is used to see the tooth roots of mandibular cheek teeth

Answer 10

latero45°ventral-laterodorsal oblique view

Question 11

what is the oblique view that is used to see the temporomandibular joint

Answer 11

rostro35°lateral 50°ventral-caudodorsal oblique

Question 12

define prognathia

Answer 12

parrot mouth
maxilla is longer than the mandible- upper incisors further rostral than the lower

Question 13

define brachygnathia

Answer 13

sow mouth
mandible is longer than maxilla
RARE

Question 14

define polydontia

Answer 14

too many teeth
should be 6 cheek teeth on each side

Question 15

define oligodontia

Answer 15

too few teeth
normally have 6 cheek teeth on each side

Question 16

List 5 things we see on radiographs with periapical abscess

Answer 16

Widening of periodontal space
Loss of lamina dura
Periapical bone lysis
Sclerosis of surrounding bone
Destruction (blunting) of tooth apex

Question 17

what are the 3 most common neoplasia of the equine mouth

Answer 17

osteosarcoma
ameloblastoma
ossifying fibroma

Question 18

what horses is EOTRH is most common in

Answer 18

older horses

Question 19

what is EOTRH

Answer 19

Equine odontoclastic tooth resorption and hypercemetosis
teeth are reabsorbed and increase in cementum

Question 20

why is CT better than radiography for looking a horse teeth

Answer 20

CT is much better at showing individual structures compared to radiography - more exact diagnostic tool