Section 18: Mechanical Properties of Bone 18-1 From: Vanwanseele - - PowerPoint PPT Presentation

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Mar 29, 2024 239 likes •420 views

Section 18: Mechanical Properties of Bone 18-1 From: Vanwanseele 18-2 Load-deformation Relationships 18-3 From: Brown From: Vanwanseele 18-4 From: Seeley 18-5 Bone Biomechanics Bone Biomechanics Bone is anisotropic - its modulus is

SLIDE 1

Section 18: Mechanical Properties of Bone

18-1

SLIDE 2

18-2 From: Vanwanseele

SLIDE 3

Load-deformation Relationships

18-3 From: Brown

SLIDE 4

18-4 From: Vanwanseele

SLIDE 5

18-5 From: Seeley

SLIDE 6

Bone Biomechanics Bone Biomechanics

Bone is anisotropic - its modulus is

Bone is anisotropic its modulus is dependent upon the direction of loading.

Bone is weakest in shear, then tension,

Bone is weakest in shear, then tension, then compression.

Ultimate Stress at Failure Cortical Bone

Ultimate Stress at Failure Cortical Bone

Compression < 212 N/m2 Tension < 146 N/m2 e s o 6 / Shear < 82 N/m2

18-6 From: Le

SLIDE 7

18-7 From: Vanwanseele

SLIDE 8

Load Deformation Testing

18-8 From: Brown

SLIDE 9

18-9 From: Vanwanseele

SLIDE 10

18-10 From: Gillet

SLIDE 11

18-11 From: Gillet

SLIDE 12

18-12 From: Gillet

SLIDE 13

Basic Biomechanics Basic Biomechanics

Anisotropic
Viscoelastic

Anisotropic

– Mechanical properties dependent upon

Viscoelastic

– Stress-Strain character dependent direction of loading upon rate of applied strain (time dependent). p )

18-13 From: Le

SLIDE 14

18-14 From: Gillet

SLIDE 15

18-15 From: Seeley

SLIDE 16

Bone Remodeling

Bone is a

dynamic tissue tissue.

– What does that mean?

Wolff’s law
Wolff s law

holds that bone will grow

r remodel in
r remodel in

response to the forces or demands demands placed on it. Examine this with the bone

18-16 From: Imholtz

with the bone

n the left.