Abos - Basic Science:tendons And Ligaments:ligaments

Front 1

How does the collagen content of ligaments compare to that of tendons?

Back 1

Decreased: ligaments have 70% collagen content vs. 85% (tendons)

Front 2

What effect does this have on the stress-strain curve of
ligaments?

Back 2

Ligaments have a larger toe region

Front 3

What else is significant about the composition of ligaments relative to content tendons?

Back 3

Ligaments have greater elastin

Front 4

How are ligaments supplied with blood?

Back 4

Vascular supply from ligament insertion
Distruted throughout ligament uniform microvascularity

Front 5

Are ligaments innervated?

Back 5

Yes; nerve endings provide proprioceptive feedback and contribute to joint stability

Front 6

What two types of bony insertions are seen with ligaments?

Back 6

Indirect
Direct

Front 7

What type is more common?

Back 7

Indirect

Front 8

Direct ligament insertions: in what two ways are the fibers different?

Back 8

Have superficial fibers also
But deep fibers attach perpendicular to the bone and go through four transitional tissue phases (like tendons)

Front 9

Is a ligament capable of plastic deformation?

Back 9

No

Front 10

What is the most common mechanism by which a ligament fails?

Back 10

Sequential rupture of collagen bundles

Front 11

Where does the failure occur most commonly: compare children vs. adults.

Back 11

Children: avulsion at the junction of unmineralized and mineralized fibrocartilage zones
Adults: midsubstance injury

Front 12

What type of collagen predominates in the early healing phase?

Back 12

Type lll collagen

Front 13

What type of collagen predominates in the late healing phase?

Back 13

Type l

Front 14

What is the effect of prolonged immobilization on ligament repair strength?

Back 14

Reduced {similar to tendons)