The invention can be used without being rolled into a three-dimensional U shape, and has excellent bending resistance.
本发明无需卷曲成立体U形即可使用、具有良好的耐弯折性能。
Strength and bending resistance test, welding heat test and highly accelerated life test (HALT) were retested up to grade.
经瓷体强度实验、抗弯曲实验、耐焊接热实验、加速寿命实验，其各项指标均合格。
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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