Test 1: Bone Healing Flashcards Preview

4th Semester: MOD > Test 1: Bone Healing > Flashcards

Flashcards in Test 1: Bone Healing Deck (37):
1

What provides the long bones with blood in

the mature animal?

Principle nutrient artery

Metaphyseal arteries and Periosteal arteries

2

What provides the blood supply to the long bones

in an immature animal?

Epiphyseal arteries

Metaphyseal arteries

3

What supplies fractured long bones with blood?

Newly developed extraosseous blood supply

4

Healing by intermediate callus formation

Indirect healing

5

healing by primary osteonal reconstruction

Direct healing

6

What are the steps of indirect healing?

Inflammation

Repair

Remodeling

7

What are the types of direct healing?

Contact healing

Gap healing

8

If the gap between fracture fragments is 

greater than 1 mm

this type of healing occurs

indirect healing

9

If the gap between fracture fragments is

less than 0.01 mm

what type of healing occurs?

Direct CONTACT healing

10

If the gap between fracture fragments is

less than 1 mm

what type of healing occurs?

Direct GAP healing

11

In what stage of indirect healing does

the extraosseous blood supply develop?

Inflammatory Stage (1)

12

In what stage of indirect healing does

a clot develop at the fracture site?

Inflammatory stage (1)

13

In what stage of indirect healing does

the clot change into granulation tissue

by action of mononuclear cells and fibroblasts?

Repair stage (2)

14

In the repair stage of indirect healing, trace the

clot transformation through the formation of

a bony union

Clot --> Granulation tissue -->Soft callus --> Medullary and external callus (fibrocartilage) --> hard callus-->

Bony union

15

What stage of indirect healing is governed by

Wolff's Law?

Remodeling Stage (3)

16

Which method of direct bone healing results in

lamellar bone oriented in the normal axial direction?

Contact healing

17

Which method of direct healing is characterized

by simultaneous bony union and remodeling?

Contact Healing

18

Which method of direct bone healing is characterized by lamellar bone deposition in the perpendicular

direction first, and 3-8 weeks later, lamellar bone deposition longitudinally oriented?

Gap healing

19

In what type of bone healing

does bridging of the fracture site occur before union of the cortical shell? This type does NOT heal by callus formation and is characterized by

woven bone deposition.

Healing of Cancellous/Trabecular bone

20

What type of fracture occurs because the area is weaker than surrounding bone?

Physeal bone fracture

21

In a physeal bone fracture,

how will a fracture in the

Zone of Hypertrophy heal?

Will heal by

continued growth of physeal cartilage

22

In a physeal bone fracture,

how will a fracture in the

Zone of Proliferation heal?

Will heal by

endochondral ossification

23

How will a bone plate implant heal?

Direct healing (contact or gap)

24

What is the only type of implant that can heal

via direct bone healing?

Bone plate implant

25

Which type of implant has no significant disruption of blood supply unless loose?

Cerclage wires and external fixator

26

Under what circumstances is a bone graft indicated?

Comminuted fractures

Fractures with bone loss

Delayed or nonunion fractures

Arthrodeses

(artificial induction of joint ossification between two bones via surgery)

27

A bone graft from another individual of the same species

Allograph

28

Bone graft from an individual of a different species

Xenograft

29

What is considered the GOLD STANDARD

for bone grafts?

Autogenous Cancellous

bone graft

30

Which type of bone graft is readily available as frozen chips or powder, and has no osteogenic properties?

Allograph Cancellous

bone graft

31

Which type of cancellous bone graft

promotes osteogenesis, osteoinduction and osteoconduction (on a lesser level)?

Autogenous Cancellous

bone graft

32

What type of bone graft provides

immediate mechanical support?

Cortical-Cancellous

bone graft

33

Which type of bone graft is indicated for

highly comminuted fractures

and for

bone tumors?

Cortical

bone grafts

34

Which bone graft has the best

mechanical support and is osteoconductive only?

Cortical bone grafts

35

Laying down new bone by osteoblasts

Osteogenesis

36

Recruitment of host mesenchymal cells to form

new bone or osteogenesis

Osteoinduction

37

Providing a scaffold for growth of new bone

Osteoconduction