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Skeletal Pathobiology > Radiology of Bone Healing > Flashcards

Radiology of Bone Healing Flashcards

1
Q

what are the borders like in an older fracture?

A

smoother

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2
Q

how will fragments fuse in a malunion?

A

abnormal anatomical position

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3
Q

what is an atrophic non-union like?

A

resorption of bones: look like tips of pencils
no new bone formation

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4
Q

what are some complications of bone healing?

A

atrophic nonunion
malunion
synostosis

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5
Q

what is synostosis?

A

normal or abnormal fusion of two bones

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6
Q

what does a hypertrophic nonunion look like?

A

new bone formation
still gap between pieces

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7
Q

what factors affect bone healing?

A

vascular integrity
location
type of fracture
age and species
metabolic factors

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8
Q

what are the stages with blood flow after a fracture?

A

fracture occurs
hematoma forms in fracture
granulation tissue
revascularization using granulation tissue

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9
Q

______________ crossing fracture gap are the basis for healing

A

micro vessels

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10
Q

how long will it take a bone to heal in an animal under 3 months old with an IM pin/external fixation or plate?

A

IM pin/external fixation: 2-3 weeks
plate: 4 weeks

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11
Q

how long will it take a bone to heal in an animal 6-12 months old with an IM pin/external fixation or a plate?

A

IM pin/external fixation: 5-8 weeks
plate: 12-16 weeks

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12
Q

how long will a plate or IM pin/external fixation take to heal in a 3-6 month old?

A

IM pin/external: 4-6 weeks
plate: 4-8 weeks

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13
Q

how long will a plate or IM pin/external fixation take to heal in a 6-12 month old?

A

IM pin/external: 5-8 weeks
plate: 12-16 weeks

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14
Q

how long will a plate or IM pin/external fixation take to heal in an animal over a year old?

A

IM pin/external: 7-12 weeks
plate: 20-36 weeks

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15
Q

what happens 5-10 days after reduction of a fracture?

A

demineralization of fracture borders
lose sharp borders and fracture gap is wider

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16
Q

what happens 10-20 days after reduction of a fracture?

A

endosteal and periosteal new bone formation
decreasing fracture gap
variable loss of opacity with fragments

17
Q

what happens more than 30 days after reduction of a fracture?

A

bridging callus more opaque and prominent
fracture gaps gradually disappear

18
Q

what happens more than 90 days after reduction of a fracture?

A

continuing remodeling of the external callus
trabecular pattern may be visible in callus
cortex may become more visible

Skeletal Pathobiology (12 decks)

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