超高分子量聚D,L乳酸小夹板螺钉行颧弓骨折内固定的动物实验研究

Internal Fixation for Zygomatic Arch Fracture with Super high Molecular Weight Poly D, L lactic Acid Mini plates and Screws: A Study in Dogs

目的：观察新型可吸收性骨夹板的骨内固定效果。方法：采用自身对照研究方法，用超高分子量生物降解材料聚Ｄ，Ｌ乳酸制作小夹板、螺钉内固定装置，对１０只狗进行颧弓骨折内固定，并与金属钛小夹板、螺钉内固定相比较。结果：对颧弓凹陷性骨折，分子量高达６０万ｋＤ以上的超高分子量聚Ｄ，Ｌ乳酸小夹板螺钉的机械性能足够维持骨段的稳定性并支撑其愈合。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。

Objective:To investigate the internal fixation effects of super high molecular weight(M v=6.0×10 5 kD) poly D, L lactic acid(PDLLA) mini plates and screws. Methods: 10 dogs were utilized in this experiment with the self contrast study method, comparing with the titanium mini plates and screws.Results: The mechanical properties of the PDLLA mini plates and screws appeared to be sufficient to enable undisturbed healing of depressed zygomatic arch fracture.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.