Dentistry Flashcards
Pair which one is correct:
1. Anelodont
2. Elodont
3. Aradicular
4. Radicular
a. Tooth with limited period of growth
b. Closed root (horses)
c. Continuous growing teeth
d. Open root (rabbits and rodents)
1 - a
2 - c
3 - d
4 - b
What does it mean to have a clinical crown?
Portion of the crown above the gingiva
What does it mean to have a reserve crown?
Hypsodont teeth crown portion below the gingival margin
(T/F) A hypsodont tooth are a long crowned tooth and a brachydont are a short crowned tooth.
True
Can we distinguish the premolars and molars of rabbits?
No, they are indistinguishable aradicular hypsodont cheek teeth
What separates out the rodent groups when it comes to dentistry?
Masseter muscle placement (superficial and deep)
- Not the teeth
What do you need in an awake oral exam to check on cheek teeth?
Need a speculum - Plastic otoscope cone or nasal speculum in an otoscope handle
What is unique in rabbits with their teeth?
They have an extra upper incisor behind the first incisors
How much can rabbit incisors grow per year?
10-12 cm per year
(T/F) In rabbits all their teeth are closed rooted, hyposont, and all teeth can overgrow.
False - everything is true except their teeth are open rooted
How should the upper incisors be positioned against the lower incisors rabbits?
Lower incisors caudal to the upper
How should the upper molars be positioned against the lower molars in rabbits?
Lower molars slightly medial to upper molars
How do the molar teeth wear in rabbits?
Only by grinding against themselves
What are some causes of incisor malocclusions in rabbits?
Congenital, trauma or secondary to cheek teeth malocclusion
What are some causes of molar malocclusions in rabbits?
Acquired, vitamin D deficiency from being indoors, inadequate/improper chewing motion, pain from jaw disease or middle ear disease
What diet requires rabbits to chew from side to side?
Hay and plants
- Pellet rations chew up and down to crush
Why is it harder to figure out if rabbits have incisor malocclusions?
Because they do not see difficulty eating (will not see loss of weight)
They might see injury to tongue or even roof of mouth
What will owners see with cheek teeth malocclusions in rabbits?
Difficulty eating, they might see slobbering, dropping feed, act hungry/losing weight
What will the inside (lower teeth) of the edges in cheek teeth in rabbits injure? How about the outside edges (upper teeth)?
Inside = Tongue
Outside = Jaw
What else can be seen secondarily to cheek teeth malocclusions in rabbits?
Nasolacrimal duct blockage, exophthlamus, facial swelling from apical swelling/abscess, lip and dewlap dermatitis
(T/F) Once a rabbit gets malocclusions it is going to be for life but we only want to trim or extract but no torque teeth.
True
Which teeth are we able to trim in awake rabbits and which teeth require sedation?
Awake - incisors
Sedation - molars
When do incisors have to get trimmed for rabbits?
Every 3-4 weeks
What type of equipment should we use for trimming molars in rabbits?
Low speed dental piece with guarded molar grinders (diamond coated bits)
Do not use cutting bits
Bone in a rabbits tooth is (strong/fragile) and (thick/thin)
Fragile and thin
How do we prevent malocclusions from happening in rabbits?
Not breed affected lines
Feed timothy or other hay to encourage usage of molars
Direct exposure to sunlight
Provide toys/objects to chew on will not really have any benefits
Which rodents have all teeth elodont?
Guinea pigs, chinchilla, degu
Which rodents have only the incisors elodont?
Rat/mouse, hamster, gerbil, prairie dog
What is different in guinea pigs teeth compared to the rabbits?
They have a 30 degree angle to occlusive plane between top and bottom molars (aka the roots are curved)
Their mouth cant open as wide as rabbits
In guinea pigs, what is wider, the mandible or the maxilla?
Mandible
What is a geriatric issue that happens to guinea pigs because of their teeth?
TMJ issues
In guinea pigs it is important to check their tongue, why?
The cheek teeth can overgrow medially and the tongue can become entrapped because of this
What is the recommended treatment for guinea pigs if the tongue is entrapped due to a malocclusion?
Extractions are recommended
Which teeth are stained yellow- orange in chinchillas?
Incisors
Which malocclusions are acquired in chinchillas?
Molars
(T/F) Rat/mice like rodents have very thin multirooted teeth.
True
