所述螺钉的螺杆直接旋入所述固定件的螺孔内，二者的螺纹紧密结合，从而可将两板体牢固连接于一起。
The screw of bolt revolted into threaded hole directly and the screw thread of them are combined tightly, so the two boards can be connected together firmly.
结论：在下颌骨单纯线性骨折治疗中，PDLLA小夹板螺钉是一种可选择的骨折内固定材料，优点是不需要二次手术取出。
CONCLUSION: Bioabsorbable PDLLA plates and screws can be selectively used for internal fixation in single linear mandibular fractures, with the advantage that they do not need to be removed.
结论：聚d, L乳酸小夹板、螺钉同金属钛小夹板、螺钉内固定一样，对颧弓骨折具有良好的骨内固定效果，对骨折愈合过程无任何不良影响，其显著优点是无需二次手术取出。
Conclusion: the good fixation effect of PDLLA mini plates and screws was as same as that of the titanium mini plates and screws without the need of secondary operation.
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