Ch 9/10 Dental Flashcards
There are no deciduous _______ in the dog and cat.
A: first premolars
B: second premolars
C: third premolars
D: molars
What else, just in the dog?
D: molars
In the dog, also A: first premolars
Mature or immature dog?
Mature - the PM1 and PM2 pulp cavities are thin; the canine tooth is non vital, this has resulted in failure of dentinogenesis and therefore the pulp cavity is still wide
When can you evaluate permanent dentition radiographically (in dogs and cats)?
A: 4 weeks
B: 8 weeks
C: 12 weeks
D: 16 weeks
C: 12 weeks
this is when crown calcification becomes apparent
Which is the most common tooth affected by dentigerous cysts?
A: mandibular first premolar
B: maxillary canine
C: mandibular first molar
D: mandibular canine
A: mandibular first premolar
Which type of cyst is characterised by a a well-defined uni- or multi-locular lucency surrounding the crown of an unerupted tooth, and attached at the cementoenamel junction?
A: dentigerous cyst
B: eruption cyst
C: periapical cyst
D: lateral periodontal cyst
A: dentigerous cyst
Odontogenic tumors usually metastasize to the
A: Lung
B: Lymph nodes
C: Brain
D: They don’t
D: They don’t
Which type of animal is overrepresented for odontomas?
A: Siamese cats
B: Yorkshire terriers
C: Spaniels
D: Brachycephalics
C: Spaniels
How would you position to get the right maxillary teeth? which recumbency and which part elevated
R lateral, elevated mandibles
whatever side you are aiming for - this recumbency.
elevated the opposite dental arcade; i.e. if you are imaging the mandibles, elevated the maxilla, and vice versa.
Which tympanic bulla is the dependent side - cranial or caudal one?
cranial
The disc space cranial to the anticlinal vertebra is often ______________.
narrower
What is the bisecting angle in dental radiography?
angle between tooth and plate, to which the x-ray beam should be perpendicular to avoid artifactual shortening or elongation
what’s different about the permanent teeth?
open apices; note how there is no deciduous for the 1st premolar and 3 molars.
Cat dental formula - how many teeth is that?
deciduous formula
3/3I - 1/1C - 3/2P - 1/1M = 30 teeth
deciduous, same w/o 1/1M = 26 teeth
Dog dental formula - how many teeth is that?
deciduous formula
3/3I - 1/1C - 4/4 - 2/3 = 42 teeth
deciduous: 3/3I - 1/1C - 3/3 (no molars obviously, and no first premolar) = 28 teeth
In dogs, triadian system - what number do the teeth go up to in the maxilla / mandible?
maxilla 110/210
mandible 311/411
Which tissues are the periodontium and which are endodotium?
The periodontium consists of both hard and soft tissue components that support the teeth: the alveolar bone, the periodontal ligament, the gums, and the cementum.
Endodontium = the pulp and dentin
Why would you get this double line?
Double lamina dura (white arrow) due to convexity at mesial
root of the left mandibular first molar.
What’s the difference between A-C and D?
D is nonvital (304), A - C show normal transition from immature to adult tooth
What is the chevron sign?
Normal variation; periapical lucency in healthy teeth, corresponds to normal trabecular bone and vascular channels.
normal; Chevron sign
How many types of tooth resorption are recognised radiographically?
3 ;
Type 1 - focal/multifocal, but intact peri-lig and tooth opacity
Type 2 - tooth is replaced by bone and peri-lig not visible
Type 3 - combination within the same tooth
Is it normal for the tooth root to contact the ventral mandibular cortex?
common in toy/small breed dogs, they have less bone in proportion to the size of their teeth
When does the dental apex close?
when the tooth reaches its full length;
7-10mo (dog), up to 11mo (cat)
this is earlier in the molars (they are shorter), and later in the canines (obvs)
what kind of bone loss is this?
horizontal
