2019 Soltero-Rivera M et al, Fracture Limits of maxillary 4th Premolar teeth in domestic dogs under applied forces Flashcards

Frontier AR involved

1
Q

Prevalence of tooth fracture in dogs

tooth fracture in maxillofacial trauma in dogs

A

20-27%

67-85%

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2
Q

3 layers of enamel in cat and dog

A

surface - non prismatic layer
regular prismatic layer
inner layer - has prominent bands Hunter- Schreger bands - which may indicate multidirectional orientation of rods

Hunter - Schreger bands are not true structure but optical illusion produced by changes in direction between groups of rods

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3
Q

What biting force dogs can voluntarily generate?

A

12 to 1394N and directional proportional to size

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4
Q

Does the bite force is proportional to dog size?

A

Yes, it is

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5
Q

What is the maximum pulling force all 4 canines teeth can generate ?

A

480 to 1200 N

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6
Q

To stimulate chewing under anesthesia that maximum potential bite for for dogs

A

> 3400 N at molar teeth

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7
Q

with all 4 canine teeth involved - what is the maximum pulling force ?

A

480 to 1200 N

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8
Q

stimulate the chewing under GA , what is the maximum potential bite force in dogs

A

> 3400 N

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9
Q

Most common 4th maxillary PM fracture

A

1) CCF 2) CRF

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10
Q

What is the force range on canine teeth to fracture it ?
What does the fracture depend on?

A

495 to 630 N
depends on canine tooth height to diameter ratio

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11
Q

A lower or higher crown height to diameter ratio has been found to increase fracture resistance of canine tooth that have undergone endodontic or prosthodontic therapy ?

A

A lower crown height to diameter has been found to increase fracture resistance of canine tooth

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12
Q

A rigid material that fails to break below a certain force could fracture the 4th maxillary premolar . What is the force?

A

<1281N - anything above this force could break the tooth

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13
Q

explain the sharp pain elicited from a tooth

A
  • 90% of A fiber in dental pulp tissue in human teeth are A delta fibers –> located in pulp dentin border in coronal part of the pulp and concentrated in pulp horns-> transmit directly to thalamus –> generate a sharp pain
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