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3D loading-measurement system verification. Measured intact equine radii stiffness values for selected load ranges of the third loading cycle were observed to be the same order of magnitude as theoretically predicted values for compression, torsion, and 4-point bending. |
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| Mean (± SD) stiffness of 50 mm long test segment |
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| Axial Compression (N/mm) |
+ Torsion (Nm/deg) |
- Torsion (Nm/deg) |
CrCa Bend (Nm/deg) |
CaCr Bend (Nm/deg) |
LM Bend (Nm/deg) |
ML Bend (Nm/deg) |
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| Load Ranges |
200 to 4000 N |
10 to 50 Nm |
-10 to -50 Nm |
10 to 150 Nm |
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| Measured using: 3D loading-measurement system |
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| Intact Control |
295000 (± 130977) |
+430 (± 49) |
-405 (± 57) |
1007 (± 258) |
885 (± 117) |
1680 (± 395) |
1452 (± 368) |
| Theoretical using: classical mechanics equations, cross-section measured dimensions, & two shapes |
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| Ellipse (hollow) |
278000 (± 15261) |
250 (± 26) |
400 (± 49) |
879 (± 94) |
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| Rectangle (hollow) |
354000 (± 35277) |
556 (± 57) |
679 (± 83) |
1490 (± 159) |
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Bone properties assumed: Modulus of Elasticity (E) = 18000 N/mm2. Range in literature: (8900 ≤ E ≤ 42000) Shear Modulus (G) = 4615 N/mm2. Range in literature: (3500 ≤ G ≤ 8710) | |||||||
Janicek et al. Journal of Orthopaedic Surgery and Research 2007 2:21 doi:10.1186/1749-799X-2-21 |
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