Biomechanics of Bone and Articular Cartilage

Question 1

Biomechanics

What percent of total body weight is bones, cartilage, ligaments, & joints?

Bone and Articular Cartilage

Answer 1

20%

Question 2

Biomechanics

What is hematopoiesis and where does it occur?

Bone and Articular Cartilage

Answer 2

Hematopoiesis is the formation of blood cellular components. It takes place in the marrow of long bones

Question 3

Biomechanics

What are the differences between Cortical and Cancellous Bone?

Bone and Articular Cartilage

Answer 3

Cortical: compact, very dense, outer layer
Cancellous: spongy, very porous, inner layer

Question 4

Biomechanics

What is a sesamoid bone and provide and example.

Bone and Articular Cartilage

Answer 4

A sesmoid bone resides in the midddle of a tendon. The patella is our largest example.

Question 5

Biomechanics

What percent of bone is water?

Bone and Articular Cartilage

Answer 5

20-30%

Question 6

Biomechanics

What percent of bone is minerals and collagen?

Bone and Articular Cartilage

Answer 6

60-70%

Question 7

Biomechanics

Define Wolff’s Law

Bone and Articular Cartilage

Answer 7

In response to decreased stress osteoclasts dominate to resorb tissue.
In response to increased stress osteoblasts dominate to deposit tissue.

Question 8

Biomechanics

Bone is anisotropic & viscoelastic. What does this mean?

Bone and Articular Cartilage

Answer 8

Anisotropic means bone response depends on direction of load application
Viscoelastic means bone response depends on rate & duration of loading

Question 9

Biomechanics

During the elastic response what happens when the load is removed?

Bone and Articular Cartilage

Answer 9

The tissue returns to its original shape/length

Question 10

Biomechanics

During the plastic response what happens when the load is removed?

Bone and Articular Cartilage

Answer 10

The tissue is permanently deformed

Question 11

Biomechanics

What is cartilage and what nourishes this tissue?

Bone and Articular Cartilage

Answer 11

Cartilage is firm, flexible tissue that has no blood supply or nerves, so it receives its nourishment through synovial fluid.

Question 12

Biomechanics

What are the three primary types of cartilage?

Bone and Articular Cartilage

Answer 12

1. Hyaline (Articular)
2. Fibrous
3. Elastic

Question 13

Biomechanics

What are primary sites of fibrocartilage?

Bone and Articular Cartilage

Answer 13

Temporomandibular Joint
Intervertebral Discs
Knee Meniscii

Question 14

Biomechanics

Bone and Articular Cartilage

Question 15

Biomechanics

Bone and Articular Cartilage