Objective To study the dysfunction and biomechanical change of rotational deformity in long bone fracture of lower limb.

In order to observe the rehabilitation therapeutic effect of rapid rotation of angular rotation in the treatment of prolapse of lumbar intervertebral disc, the patients were divided into group A: n= 126, undergoing rapid traction of angular rotation combined with routine comprehensive therapyl and group B: n =126, receiving routine comprehensive therapy only.

Magnesium alloy is known as a future-oriented,environment-friendly practical structural metal material,and rotary forming is a kind of environment-friendly metal plastic forming technology,so spinning forming technology of magnesium alloy is a high-technique,environment-friendly advanced metal plastic forming technology which is necessary to be developed and researched.