Data

Loading Test #1 -- Unscaled Femur (Healthy)

Length of bone= 14.6 mm

Cross-sectional length of Head= 2.4 mm

Cross-sectional length of Trochantic Fossa= 1.7 mm

Cross-sectional length of Supracondyloid Fossa = 1.3 mm

Cross-sectional length of Midshaft= 1.6 mm

Cross-sectional length of Lower Midshaft= 1.6 mm

Cross-sectional length of Minor Trochanter= 1.7 mm

Cross-sectional length of Medial Condyle= 2.7 mm

Span between supports= 8.5 mm

*Note: Because the size of the femur was too small, the group was unable to calculate values such as bending stiffness and Young's Modulus. Thus, it was decided that consequent femur designs will be scaled to 100 mm. 

Click HERE for a detailed explanation of our testing procedure. 

Loading Test #2 (Hollow Cylinder)

Length= 99.4 mm

Length of Outer Diameter (Major Axis)=  8.2 mm

Length of Inner Diameter (Major Axis)=  6.5mm

Length of Outer Diameter (Minor Axis)= 8.2 mm

Length of Inner Diameter (Major Axis)=  6.5mm

Span between supports= 44.1mm

Bending Stiffness (kb)= 78.879 N/mm

Young's Modulus (E)= 1071.6

Circular cross section with inner diameter= 6.5mm
and outer diameter= 8.2mm 

Extrapolation of bending stiffness value from Force vs. displacement graph.

Loading Test #3 -- Scaled Femur (Healthy, no acetone treatment)

Mass= 4.83g
Length= 94.2 mm

Length of Outer Diameter (Major Axis)=  12 mm

Length of Inner Diameter (Major Axis)=   9.0 mm

Length of Outer Diameter (Minor Axis)= 7.5 mm

Length of Inner Diameter (Major Axis)=  5.0 mm

Span between supports= 48.2 mm

Bending Stiffness (kb)= 43.53 N/mm

Young's Modulus (E)=  525.69

Results of Loading Test Three. 

Loading Test #4 -- Scaled Femur (Normal, 30 sec acetone treatment)

Mass= 5.00g
Length= 93.8 mm

Length of Outer Diameter (Major Axis)=  12.05 mm

Length of Inner Diameter (Major Axis)=  7.9 mm

Length of Outer Diameter (Minor Axis)= 7.2 mm

Length of Inner Diameter (Major Axis)=  4.3 mm

Span between supports= 48.7mm

Bending Stiffness (kb)= 39.44 N/mm

Young's Modulus (E)= 499.64

Results of Loading Test Four.

Loading Test #5 -- Scaled Femur (Normal, 60 sec acetone treatment)

Mass= 5.01g
Length= 93.8 mm

Length of Outer Diameter (Major Axis)=  11.9 mm

Length of Inner Diameter (Major Axis)=  7.9 mm

Length of Outer Diameter (Minor Axis)= 7.4 mm

Length of Inner Diameter (Major Axis)=  4.65 mm

Span between supports= 48.7mm

Bending Stiffness (kb)= 36.93 N/mm

Young's Modulus (E)= 449.40

Results of Loading Test Five.

Loading Test #6 -- Scaled Femur (Modified, no acetone treatment)

Mass= 5.50g
Length= 93.8 mm

Length of Outer Diameter (Major Axis)=  13.8 mm

Length of Inner Diameter (Major Axis)=  10.15 mm

Length of Outer Diameter (Minor Axis)= 8.25 mm

Length of Inner Diameter (Major Axis)=  5.55 mm

Span between supports= 48.7mm

Bending Stiffness (kb)= 96.28 N/mm

Young's Modulus (E)= 784.78

Results of Loading Test Six.

Loading Test #7 -- Scaled Femur (Modified, 30 sec acetone treatment)

Mass= 5.71g
Length= 93.8 mm

Length of Outer Diameter (Major Axis)=  13.65 mm

Length of Inner Diameter (Major Axis)=  9.4 mm

Length of Outer Diameter (Minor Axis)= 8.15 mm

Length of Inner Diameter (Major Axis)=  5.40 mm

Span between supports= 48.7mm

Bending Stiffness (kb)= 79.54 N/mm

Young's Modulus (E)= 659.87

Results of Loading Test Seven.

Loading Test #8 -- Scaled Femur (Modified, 60 sec acetone treatment)

Mass= 5.72g
Length= 93.8 mm

Length of Outer Diameter (Major Axis)=  14.00 mm

Length of Inner Diameter (Major Axis)=  10.05 mm

Length of Outer Diameter (Minor Axis)= 7.55 mm

Length of Inner Diameter (Major Axis)=  4.55 mm

Span between supports= 48.7mm

Bending Stiffness (kb)= 83.98 N/mm

Young's Modulus (E)= 810.64

Results of Loading Test Eight.

Loading Test #9 --Healthy Femur (no acetone)

Mass=
Length=
Length of Outer Diameter (Major Axis)=12.2

Length of Inner Diameter (Major Axis)=9.1
Length of Outer Diameter (Minor Axis)=7.2

Length of Inner Diameter (Major Axis)=  5.4

Span between supports= 36.8

Bending Stiffness (kb)= 129.43

Young's Modulus (E)= 877.24

Results of Loading Test Nine.

Loading Test #10 (Healthy 60s Acetone treatment)

Mass=
Length=
Length of Outer Diameter (Major Axis)= 12mm

Length of Inner Diameter (Major Axis)=  9.0mm
Length of Outer Diameter (Minor Axis)= 7.1mm

Length of Inner Diameter (Minor Axis)=  5.0mm

Span between supports= 36.8mm

Bending Stiffness (kb)= 88.34 N/mm

Young's Modulus (E)= 589.46

Loading Test #11 --Small Modification 1a (sixty second acetone treatment)

Mass=
Length=
Length of Outer Diameter (Major Axis)=12.5

Length of Inner Diameter (Major Axis)=8.7
Length of Outer Diameter (Minor Axis)=7.5

Length of Inner Diameter (Major Axis)=  4.8

Span between supports= 36.8

Bending Stiffness (kb)= 124.32

Young's Modulus (E)= 609.91

Results of Loading Test Eleven.

Loading Test #12-- Medium Modification 2a (sixty second acetone treatment) 

Mass=
Length=
Length of Outer Diameter (Major Axis)= 12.8mm

Length of Inner Diameter (Major Axis)= 8.8mm
Length of Outer Diameter (Minor Axis)= 7.8mm

Length of Inner Diameter (Major Axis)=  8.8mm

Span between supports= 36.8mm

Bending Stiffness (kb)= 141.18 N/mm

Young's Modulus (E)= 672.86 

Loading Test #13 -- Large Modification 3a (sixty second acetone treatment)

Mass=
Length=
Length of Outer Diameter (Major Axis)=13.4mm

Length of Inner Diameter (Major Axis)=9.6 mm
Length of Outer Diameter (Minor Axis)=7.8 mm

Length of Inner Diameter (Minor Axis)=  4.7mm

Span between supports= 36.8mm

Bending Stiffness (kb)= 145.59 N/mm

Young's Modulus (E)= 629.09

Results of Loading Test Thirteen.

Loading Test #14 -- Small Modification 1b (sixty second acetone treatment)

Mass=
Length=
Length of Outer Diameter (Major Axis)= 12.5mm

Length of Inner Diameter (Major Axis)=  8.7mm
Length of Outer Diameter (Minor Axis)=  7.1mm

Length of Inner Diameter (Major Axis)=   9.0mm

Span between supports= 36.8mm

Bending Stiffness (kb)=  124.30 N/mm

Young's Modulus (E)= 609.00

Loading Test #15 -- Medium Modification 2b (sixty second acetone treatment)

Mass=
Length=
Length of Outer Diameter (Major Axis)=13.0mm

Length of Inner Diameter (Major Axis)=9.4mm
Length of Outer Diameter (Minor Axis)=7.6mm

Length of Inner Diameter (Major Axis)=  4.7mm

Span between supports= 36.8mm

Bending Stiffness (kb)= 120.29 N/mm

Young's Modulus (E)= 537.81 

Results of Loading Test Fifteen.

Loading Test #16 -- Large Modification 3b (sixty second acetone treatment)

Mass=
Length=
Length of Outer Diameter (Major Axis)= 13.5mm

Length of Inner Diameter (Major Axis)=  9.3mm
Length of Outer Diameter (Minor Axis)= 7.9mm

Length of Inner Diameter (Minor Axis)=  4.9mm

Span between supports= 36.8mm

Bending Stiffness (kb)= 148.98 N/mm

Young's Modulus (E)= 571.60