Objective To determine if calcium phosphate cement can enhance vertebral pedicle screw fixation in the osteoporotic spine through periodical anti-bending test.
目的本实验旨在从周期抗屈试验方面证实磷酸钙骨水泥对椎弓根螺钉固定的强化作用。
2
Periodical bending resistance test in screws with hollow lateral holes in pedicle of vertebral arch was made on the rest 12 vertebrae.
另外12个椎体做空心侧孔椎弓根螺钉的周期抗屈试验。
3
Periodical check-up of the radar test equipment is one of the important tasks of the radar equipment measurement support.