cartilage Flashcards
(48 cards)
Intima
produce synovial fluid
phago joint debris
stroma
irregular connective tissue
blends w fibrous joint
has macro, lympho, mast
capsule
function?
contains?
irregular connective tissue
joint stability, vessel/nerve supply
mecohano’s for proprioception
Pacinian
sensory nerves
responsive to stretch, tension, pressure
Free nerve endings
pressure stretch, temperature pain
Articulated cartilage
contains? function
chondrocytes , glychoamino, type II collagen
shock absorption/ gliding
At osteochondral junction, collagen fibres from the ____ zone of calcified cartilage insert directly into the ____ bone
radial zone
cortical bone
T or F bones provide some shock absorption
true
T of F osteoporosis is not protective against OA development
false it is
the phyis
plate of proliferating cartilage during growth
Osteochondrosis
physis inflamed due to overuse/ biomechs
How is cartilage healing in synovial joints
limited not much blood
in adults defects larger than 2mm heal?
rarely
can any defects heal by local proliferation of chondros
very small ones
if defect extends to bone what happens?
inflammatory repair can occur (secondary healing)
Secondary healing
healing by formation of scar tissue
primary healing
local proliferation of chondros
Acute chondrol injuries in synovial joints
an acute mechanical disruption of articular cartilage
Types of acute chondrol injuries in synovial joints
Type 1, 2, 3, 4
Type 1
result of?
shearing force through cartilage
rotational injury
Type 2
result of?
compression
rotational force
bruised MRI
flattening on center or blister sometimes
Type 3
result of
rotational
can’t alway recall what they did
present similar to meniscus tear (catch lock)
Type 4 where? who similar to what
tidemark (between calcified n non calc cart)
adults
osteochondritis
loose cartilage fragments catch n lock
risk factors for chondrol injuries
athletes, trauma to joint, age