Basic Science Flashcards
Which layer of articular cartilage… has chondrocytes and collagen fibrils aligned PERPENDICULAR to the joint surface?
DEEP / RADIAL layer
Which layer of articular cartilage… contains TYPE X collagen?
CALCIFIED cartilage zone
BRITTLE materials fail in ____
fail in TENSION (at relatively low strain)
Which layer of articular cartilage… has the highest content of collagen and the lowest concentration of proteoglycan?
SUPERFICIAL layer
Which layer of articular cartilage… is responsible for distributing loads and resisting compression?
DEEP / RADIAL layer
What shape are the chondrocytes in the: DEEP zone
columns
What are the 4 layers of ARTICULAR cartilage?
(1) Superfiical (2) Transitional (3) Deep / Radial (4) Calcified
Which layer of articular cartilage… is composed almost entirely of proteoglycans?
TRANSITIONAL zone
With polyethylene debris, macrophages release ____, which activates osteoclasts
TNF alpha
What shape are the chondrocytes in the: SUPERFICIAL layer / TANGENTIAL zone
flat chondrocytes
What is the term to describe materials with:
varying mechanical properties with different loading directions?
ANISOtropic
Which layer of articular cartilage… has the greatest ability to resist shear stresses?
SUPERFICIAL layer
What is the TIDEMARK layer?
a basophilic line that straddles the boundary between calcified and uncalcified cartilage
Which layer of articular cartilage… has chondrocytes and collagen fibrils aligned PARALLEL to the joint surface?
SUPERFICIAL layer
What is the term to describe materials with:
same mechanical properties in all directions?
ISOTROPIC
