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。
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。
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