Knee- cartilage injuries and arthritis Flashcards Preview

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Flashcards in Knee- cartilage injuries and arthritis Deck (13):
1

What is hyaline cartilage composed og?

water; collagen; proteoglycans and condrocytes

2

What are the function of chondrocytes?

produce collagen, Pgs and ezymes to regulate the ECM

3

Where does hyaline cartilage get nutrition from?

synovial fluid and subchondral bone

4

What happens with osteochondritis dissecans?

an area of the surface of the knee loses its blood supply and cartilage +/- bone can fragment off

5

Who most commonly gets osteochondritis dissecans?

adolescents

6

What is the problem with cartilage regeneration techniques?

all result in fibrocartilage and not hyaline cartilage

7

What is the difference between hyaline cartilage and fibrocartilage

fibrocartilage has higher friction and is less wear resistant

8

What may predispose to knee OA?

injury- fracture; joint instability; articular cartilage injury; malalignment (genu varum or valgum); degenerate meniscal tear; infection

9

What are the treatments for early OA?

weight loss; walking aid; exercise; analgeics; activity modification

10

Why is exercise useful with OA?

preents stiffness and helps keep remaining cartilage healthy

11

When might knee replacement be used in OA?

for older patients with end stage arthritis

12

How does deep infection happen in joint replacemtnss?

1% of pcases

13

What are ther risks of knee replacement?

pain; stiffness; DVT/PE; medical complications- extra stress on the heart, lungs etc