3.0mmAO空心松质骨螺钉治疗腕舟骨骨折

目的 总结应用 3 .0mmAO空心松质骨螺钉对 9例舟骨骨折病人进行治疗的经验。方法 骨折按Herbert分型 ,A2型 5例 ,B2型 2例 ,B4型 1例 ,D1型 1例。A2型及B2型 7例骨折经皮穿钉进行内固定。B4型 1例伴有舟月骨分离 ,在切开复位固定的同时进行了舟月韧带重建。D1型 1例在切开复位的同时进行了骨移植。患者手术时平均年龄为 3 3岁。结果 术后平均随访 12个月。 9例均获得了骨性愈合。结论 3 .0mmAO空心钉对骨折端可产生良好的加压效果 。

Synthesis of Granular Hydroxy‑Functionalized Ultra‑high‑molecular‑weight Polyethylene and Its Fiber Properties

Granular hydroxyl-functionalized UHMWPE was successfully prepared through copolymerization of ethylene and 10-undecen-1-ol protected by tri-iso-butylaluminum using a titanium complex.[tBuNSiMe_(2)(2,7-tBu2Flu)]TiMe_(2) was activated in hexane by silica-supported modified-methylaluminoxane.Without any additional pretreatments,the obtained polymer powders were transformed into fibers through a gel-spinning and heat drawing process.When compared to fibers generated from the equivalent unfunctionalized UHMWPE or the commercial HUMWPE,both creep resistance and hydrophilic properties were improved in the hydroxy-functionalized UHMWPE fibers without losing tensile strength.