Research Article

A Biomechanical Research of Growth Control of Spine by Shape Memory Alloy Staples

Table 3

Results of stiffness tests and statistical comparison among three states.

Movement StateMean values of stiffness (Nm/deg) value*

Right rotationNormal >0.05
Single staple
Double staple

Left rotationNormal >0.05
Single staple
Double staple

Right bendingNormal (N&S) <0.05
Single staple (N&D) <0.05
Double staple (S&D) >0.05

Left bendingNormal (N&S) <0.05
Single staple (N&D) <0.05
Double staple (S&D) >0.05

FlextionNormal (N&S) <0.05
Single staple (N&D) <0.05
Double staple (S&D) >0.05

ExtentionNormal (N&S) <0.05
Single staple (N&D) <0.05
Double staple (S&D) >0.05

 *S stands for single staple state, D stands for double staple state, and N stands for normal state.