Hoyer et al, Prevalence of Malocclusion of Deciduous Dentition in Dogs: An Evaluation of 297 Puppies

Question 1

What is traumatic malocclusion in dogs?

Answer 1

abnormal contact between teeth and soft tissue , resulting in pain, behavior problems, and sometimes difficulty eating

Question 2

Normal occlusion

Answer 2

interdigitation of upper and lower maxillary canines
maxillary incisor teeth positioned ROSTRAL to mandibular incisor teeth
Mand canines bisects the interdental space between maxillary 3rd Incisor and maxillary canine tooth

Question 3

what occlusion is this ?

Answer 3

mal 3

Question 4

What occlusion is this ?

Answer 4

Mal 2

Question 5

What occlusion this this ?

Answer 5

mal 1

Question 6

What occlusion is this ?

Answer 6

Normal occlusion

Question 7

What is a caudal crossbite ?

Answer 7

Malocclusion 1

Question 8

How many had a malocclusion of the total study group?

Answer 8

25.9%

Question 9

Most common malocclusion that affected individual dogs and % ?

Answer 9

Mal3
17.5%

Question 10

Most common Mal1 that involved 1 or both deciduous mandibular canine teeth? %

Answer 10

92 %

Question 11

Mal3 in pure bred dogs vs mixed breed ?

Answer 11

33.8% pure bred to 20% mixed breed

Question 12

Mal 3 between % of purebred litter compared to mixed breed litter?

Answer 12

Not much different
pure bred 16.4% to mixed breed 23.5%

Question 13

AKC breed standards MAL3 between purebred dogs vs mixed breed

Answer 13

pure bred 15% mixed breed 20%

Question 14

single dogs vs litter with malocclusion - %

Answer 14

not much difference between pure bred 28.8% vs 20.4%

Question 15

AKC standard MAL3 between litter groups - purebred vs mixed breed

Answer 15

Huge difference- pure bred litter 0% vs mixed breed 23.5%

Question 16

 When considering AKC breed standard MAL3 group - between pure bred and mixed group

Answer 16

more purebred dogs with malocclusion compared to mixed breed dogs

Question 17

 When considering litter dogs that are not AKC standard breed and have MAL3 - between pure bred and mixed breed …..

Answer 17

there were more purebred dogs with malocclusion compared to mixed breed dogs

Question 18

 No significant difference between prevalence of malocclusion of mixed and purebred dogs . True or false ?

Answer 18

True

Question 19

Bones of maxilla and mandible results from which branchial arch?

Answer 19

 Embryogenesis – bones of maxilla and mandible result from development of the 1st branchial arch, which are organizations of migrating neural crest cells in developing embryo

Question 20

When does the major part of maxillofacial growth occur in the puppy?

Answer 20

8 to 12 weeks of age

Question 21

what is skull growth primarily due to?

Answer 21

intermembranous ossification  direct formation of bony matrix within existing connective tissue

Question 22

when does rostral mandible grow occur?

Answer 22

about D 50 or ~ 7 weeks of age

Question 23

which direction is the growth of mandible?

Answer 23

growth starts from caudal to 1st molar tooth around condyle

Question 24

maxilla growth starts where ?

Answer 24

o Maxillary growth occurs at incisivomaxillary suture + palatal maxillary suture

Question 25

o Contribution of length of palatal bones …….. with age and length of maxillary and incisive bone ……….. with age

Answer 25

decreases increases

Question 26

what is the significance of chondrodystrophic arrest ?

Answer 26

 Brachycephalic breeds difference between the maxilla and the mandible occurs because of chondrodystrophic arrest of the bones of the maxilla