摘要：目的　通过 14例股骨颈骨折的手术方法探讨 ,为股骨颈骨折的治疗提供一种新的选择方法。方法　截骨修整股骨颈骨折端 ,改善对合条件 ,在加压螺纹钉内固定的同时取股方肌骨瓣移植。结果　通过 14～ 36个月的随访 ,12例骨性愈合 ,1例股骨头坏死塌陷 ,1例未愈合 ,优良率 86 %。结论　该术式设计合理 ,操作简单易行 。

摘要：目的　比较单纯植骨、皮质骨螺钉与松质骨螺钉界面间固定的稳定性，并报告临床应用结果。方法　自行设计和制作松质骨螺钉在新鲜颈椎标本间盘切除及椎体部分切除的Ｓｍｉｔｈ－ Ｒｏｂｉｎｓｏｎ 法和Ｂａｉｌｅｙ 法植骨模型中，应用ＷＤ－ １ＯＥ万能电子试验机测试有无界面钉固定的拔出载荷。临床应用２０ 例中男１６ 例，女４ 例；平均４３ ．４ 岁。颈椎骨折脱位１３ 例均为不稳定型。颈椎病７ 例为脊髓混合型。结果　间盘切除模型中，单纯植骨的Ｂａｉｌｅｙ 法［（７７．４ ±１４）Ｎ］ 较Ｓｍｉｔｈ－Ｒｏｂｉｎｓｏｎ 法［（６２．６±２６．７）Ｎ］稳定（Ｐ＞ ０．０５）。皮质骨螺钉与单纯植骨相比，拔出载荷均增加，分别为（ ８８．９±２４ ）Ｎ和（８８．１±１６．６）Ｎ（ Ｐ＞ ０．０５） 。松质骨螺钉拔出载荷分别为（１４４．９±３８．４）Ｎ和（１４４．６±３３．７）Ｎ，比前两种均明显增大（Ｐ＜ ０．０５）。椎体切除模型的结果相近似。１６ 例平均随访１ 年８ 个月，无一例植骨块滑脱及螺钉松动，植骨愈合时间平均１２ 周，症状均有明显好转。３ 例术后不足３ 个月，１ 例失访。结论　界面间松质骨螺钉固定，能有效地稳定植骨块，是一种侧凸面小。

摘要：The design adopts self-designed high accurate voltage source, Micro Control Unit (MCU), D/A converter and amplifier to control the on-state of Power MOS FET, to attain constant current. The closed loop system realizes constant current output of high-precision, presettable and step-by-step adjustable, and its output current data can be directly displayed by digital devices. Finally achieve a high-precision constant current source by locking output with closed hardware loop, closed software loop, software realtime integrating, real-time filtering. The role of software is to compensate the temperature variance of sampling resistances by data segment interpolation, while the linear interpolation compensation is applied to intersegments, which improves the output precision further. It has advantages on high precision, simple construction, performance stable, easy operation, low cost and loaded capability.