JVD 2018 #1 - Dental Radiography of the Horse

Question 1

What is this device and what is it used for?

Answer 1

offset speculum, allows lateralization of the mandibles to get clearer V/D images of maxillary and mandibular teeth without superimposition.

The maxillary and mandibular bite plates slide laterally relative to one another.

Question 2

What view is pictured below, and what is it best for imaging?

Answer 2

right dorsal to Left ventral oblique (30 deg).

good for imaging apices of left maxillary teeth, and isolating the 2 buccal roots without the palatal (projected below)

open mouth view helps to remove mandibular cheek teeth

Question 3

What view is this and what is it best for isolating?

Answer 3

Right dorsal to left ventral oblique (10 deg)

For isolating the crowns of the left mandibular cheek teeth

Question 4

What is this view and what is it best for isolating?

What modification is made in young horses?

Answer 4

• right 45 ventral - left dorsal oblique
• good for isolating apices of cheek teeth, projects palatal root dorsal to the buccal roots
• make it steeper (60deg) in young horses due to cheek teeth are longer

Question 5

Name this view and what is it for highlighting?

Answer 5

right 45 ventral to left dorsal oblique.

Higlight apices of left mandibular cheek teeth.

Note same angle as last view, but aimed differently, so you get different teeth.

Question 6

What are the structures in the coloured boxes?

Answer 6

• Magenta = infraorbital canal
• Yellow = caudal maxillary sinus
• Red = Rostral maxillary sinus
• Pink = Ventral conchal bulla
• Purple = Conchofrontal sinus

Question 7

What are the highlighted structures?

Answer 7

• Red - Rostral maxillary sinus
• Black - caudal maxillary sinus
• Blue - Ventral conchal sinus

Question 8

What are the standard views for cheek teeth in the horse and what are they for imaging?

Answer 8

• Lateral - sinuses, overall impression
• left and right dorsal 30 oblique - highlight apices of maxillary teeth, cast palatal root down and highlight buccal roots
• left and right dorsal 10 oblique - highlight the crowns of mandibular cheek teeth
• left and right ventral 45 oblique (maxillary) - highlight apices of maxillary teeth and cast palatal root dorsally to visualize it
• left and right ventral 45 oblique (mandibular) highlight apices of mandibular cheek teeth
• Standard V/D - highlight sinuses
• Offset V/D’s - visualize occlusal view of crowns with less superimposition

Question 9

What are the only intraoral views in the horse?

Answer 9

Incisors and canines, bisecting angles just like in SA.