export_chapter 8 abnormalities of development and eruption

Question 1

What is different about blood supply of teeth with infundibula?

Answer 1

In addition to apical pulp blood supply, have a coronal blood supply until in occlusion

Question 2

What are bumps?

Are they a problem?

Answer 2

• eruption pseudocysts

- rarely unless in sinus and cause respiratory obstruction or if result of impactions

Question 3

Is cemental hypoplasia pathological in incisors?

CT?

Answer 3

• no
• predisposes CT to endo dz
• can result in wave mouth

Question 4

What does perio dz result in w/ respect to cementum?

Answer 4

• lysis of cementum, hyperplasia of cementum, cementum nodules

Question 5

What usually happens in cases of oligodontia?
What is long term consequence?
What can be done to avoid this?

Answer 5

• teeth move to fill in gap resulting in shorter arcade
• abnormal occlusion or change in wear
• extract “extra” tooth on other side

Question 6

What is the maximum number of teeth for a horse?

Answer 6

44

Question 7

Which teeth are rarely seen in horses?

Answer 7

305 and 405

Question 8

What are 3 causes of polydontia in a horse?

Answer 8

• budding off of tooth bud during development
• fracture of tooth bud during development
• avulsion of tooth bud during development

Question 9

What happens if traumatic polydontia occurs in a horse?

What should be done?

Answer 9

• malformed tooth

- extract

Question 10

What is problem with polydontia?

Answer 10

• malocclusion and periodz

Question 11

What is cause of enamel dysplasia in horses?

Is it significant?

Answer 11

• teratogen? idiopathic?

- none

Question 12

What is parrot mouth?
What are consequences (x)?
What is tx?

Answer 12

• class II
• nothing
• ulceration of palatal mucosa
• incisor perio dx
• exaggerated rostral hooks on 106, 206 or caudal hooks on 311, 411
• remove erupted crowns of incisor teeth

Question 13

What is monkey mouth (sow mouth)?
Is it common?
Which breeds?

Answer 13

• class III (prognathia)
• no
• small horses, ponies, minis

Question 14

What is consequence of monkey mouth?

Answer 14

• nasal deformity w/ possible obstruction/stertor

- possible trauma to mucosa

Question 15

What is camylorrhinus lateralis?
What causes it?
What breed?

Answer 15

• wry nose
  dysplasia of one side of maxilla and incisive bone
• fetal malpositioning maybe genetic?
• Arabs

Question 16

What percentage of horses have wolf teeth?
Zebras?
- maxillary or mandibular?

Answer 16

• 20-60%
• 100%
• maxillary (rarely mandibular)

Question 17

What is order of cheek tooth eruption in most mammals?

In horses?

Answer 17

• 09,10,11,06,07,08

- 09,10, 06, 07, 08, 11

Question 18

What is tx for “caudal eruption of permanent incisor” teeth in horses?
Where is this most common?

Answer 18

• usually corrects itself when deciduous tooth falls out
• if severe extract or grind down mesial/distal margins of adjacent teeth to make space
• mandible

Question 19

What is problem with delayed eruption of canine tooth?
What is tx?
What other tooth can this happen in?

Answer 19

• inflammation over unerupted crown, painful esp with bit
• operculectomy or extraction
• wolf teeth

Question 20

Which CT are most commonly impacted?

What is consequence?

Answer 20

08s

• inflammation of periapical structures (fistula, periradicular dz, sinusitis)
• palatal displacement of tooth

Question 21

What are consequences of palatal displacement of an 08?

What is tx?

Answer 21

• buccal cheek pocket or pouch that food get trapped in leading to perio dz
• change shape of adjacent teeth to reduce pocket

Question 22

What are caps?
Are they a problem?
What is consequence of removal?

Answer 22

• occlusal remnants of deciduous cheek teeth
• only if displaced
• early removal will cause additional cemental hypoplasia