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(Hierarchical) Bone Structure
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(Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Apr 23, 2018

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Page 1: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

(Hierarchical) Bone Structure

Page 2: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Basic Multicellular Unit (BMU)

Page 3: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Mechanism-Based Fracture Classification

Page 4: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Fracture Morphology (Mechanistic)

Page 5: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Fracture Morphology

Page 6: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Flexure vs. Torsional Load Uptake

Page 7: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Fracture Healing Parameters

Page 8: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Callus Maturation

Page 9: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Classic Four Stages of Fracture Healing

Page 10: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Periosteal vs. Endosteal

Callus

Page 11: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Gap Healing Histology

Page 12: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Interfragmentary Strain Theory

Page 13: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

External Fixation Interfragmentary Strain

Page 14: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Strain in Large Fracture Gaps

Page 15: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Healing with Stiff External Fixation

Page 16: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Primary vs. Secondary Healing

Page 17: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Secondary Contact Healing

Page 18: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Loading Modes

Page 19: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Fixation Mode Rigidities

Page 20: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

External Fixator Arrangements

Page 21: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

External Fixator Arrangements

Page 22: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Frame Stiffness Comparisons

Page 23: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Rigidity-Increasing Parameters

Page 24: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Pin Tract Biomechanics

Page 25: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Compression Plating

Principles

Page 26: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Intramedullary Nails

Page 27: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Subtrochanteric Fracture Fixation

Page 28: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Comparative Fixation Stiffness

Page 29: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Response to Nail vs.

Plate

Page 30: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Response to Ex-Fix vs. Plate

Page 31: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Response to Number of Pins

Page 32: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Effects of Static Compression

Page 33: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Unilateral vs. Bilateral Frames

Page 34: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Effects of Dynamization

Page 35: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Biomechanical Considerations in Fracture Treatment

Page 36: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Normal vs. Shear Stress

Page 37: (Hierarchical) Bone Structure - User page server for CoEuser.engineering.uiowa.edu/~bme_158/Lecture/Biomech… ·  · 2002-11-14100 Torsion, Ncm/ deqree E compression, N/cm . TABLE

Stress-Strain Curve