Page 1
Biomechanics of Intramedullary Rods for Fracture Fixation
Page 2
Ultimate Properties of Intramedullary Nails
Martens M. Frankel VH, Burstein AH
Injury 4: 18-24, 1973
Page 4
Load-Deformation Comparisons
Page 5
Permanent Deformation
Page 7
Four-Point Bending
Page 8
Deflection vs. Diameter Deformation
Page 10
Stress Analysis of a Partially Slotted Intramedullary Nail
Beaupré GS, Schneider E, Perren SM
J. Orthop. Res. 2: 369-376, 1984
Page 11
AO 13mm Femoral Nail
Page 12
FEM of Standard
Nail
Page 13
FEM of Cloverleaf
Nail
Page 15
Loading Configurations
Page 16
Validation Strain Gaging
Page 17
Slot Tip Alternatives
Page 18
FEM vs. Experiment
Page 20
Influences of Some Design Parameters on the Biomechanics of the Unreamed
Tibial Intramedullary Nail
Henley MB, Meier M, Tencer AF
J. Orthop. Trauma 7: 311-319, 1993
Page 23
Radiographic Appearance
Page 26
Breaking Strength
Page 27
Flexoral Stiffness
Page 28
Bone Cross-Sectional Area
Page 29
Radiographic Healing
Page 30
Mechanical Characterization of Femoral Interlocking Intramedullary Nailing
Systems
Russell TA, Taylor JC, LaVelle DG, Beals NB, Brumfield DL, Durham AG
J. Ortho. Trauma 5: 332-340, 1991
Page 32
A BC
A: AO
B: R-T
C: Mal-reduced Roddings
Page 33
Anterior Impingement
Page 34
Translation vs. Effective Diameter
Page 36
Construct Stiffness
Page 37
Effects of Locking Screw Orientation
Page 38
Effects of Cortical Contact
Page 39
The Effect of Implant Axial and Torsional Stiffness on Fracture Healing
Woodard PL, Self J, Calhoun J, Tencer AF, Evans EB
J. Orthop. Trauma 1: 331-340, 1998
Page 40
Flexural Testing Fixture
Page 42
Nail Cross-sections (Digitized)
Page 43
Bending Stiffness
Page 45
Closed
Open
St. Venant Torsional Constants
Page 46
Strength of 13 mm nails
Page 47
Screw Strength (3-point Bending)
Page 48
} Theoretical
Bending stiffness from moment of inertia
Page 49
Stiffness of 13mm nails
Page 50
Torsional Load Uptake
Page 51
Torisonal Stiffness (from moment of inertia)