[Objective]To study the cause of syringomyliasm for decompressionary cervical cord with severe pressed in patients with cervical disc hernia combined or without cervical spondylopathy.[Method]From May 1997 to December 2005,cervical spinal cord decompression had been performed in 46 patients with severe pressed on cervical spinal cord with cervical disc hernia combined or without cervical spondylopathy.They were followed-up with MRI in 3.5 to 8.8 years post-surgery.[Result]Forty-six cases were found that their MRI be showed a high and higher image in T_1W and T_2W post decompression 9 and 27 months in the segement which being pressed in spinal cord center.And the segement of cervical cord has be showen re-largement as the syringoliasm.[Conclusion]Syringoliosm could be formed after decompression for cervical cord severe pressing.

[Objective]To study the evaluation method for total ankle replacement.[Method]According to anterior-posterior and lateral Xray films of ankle joint pre-and postoperatively,the level of osteotomy and method of bone grafting were confirmed and the correct position of total ankle replacement and its complication were evaluated.Forty-six cases of total ankle replacement were followed up 2~8 years and 4 months with average 5 years and 5 months.With author's radiographic evaluation method and Ko-foed's system,results of ankle function were evaluated.[Result]The foot dorsiflexion was 6?~16? and plantoflexion 8?~28?,movement range of foot dorsiflexion and plantoflexion was 14?~38?(average 21.4?).The function results showed excellent(85~100) in 32 ankles,good(75~84) in 9,and poor(60~74) in 2,no failure case.The complication included necrosis of incision border skin of 3 ankles and intraoperative fractures of both melleola of one ankle;no foot inversion and eversion,no radiographic loosenning were seen.[Conclusion]Radiological evaluation is a critical and useful measure to enhance the quality and function of total ankle replacement,to prevent and to early find its complications.

55%)in 3 during postoperation.It were found better in the post-operative gait than in the pre-operative(P

[Objective] To study the change regulatives of BMD(bone mineral density)in after total ankle arthroplasty.[Methods]From Oct.1997 to Dec.2004,the BMD of the subjects were measured to involve in the study.There were 6 cases(5 male,1 female)with an average of 54.4 years old.Their BMD of the subjects was measured by DEX-A(Lunar)at the tibia and talus of the ankle post-arthroplasty in 6 months,12 months,2 years and 3 years postoperatively.All data were saved in computer and all statistical analyses were performed uaing SPSS 8.0 system in personal computer.[Results]The bone trabecula growing into micropore coated of the prosthesis has been showed on radiograth post-surgeryat average period of 1.5 years to 2 years.In the third year itreached bone mass at the distal tibia and talus of the total ankle replacement,which mean BMD 0.854?0.217 at post operative 6 months,BMD 0.975?0.142 at post operative 12 months,BMD 0.956?0.213 at post operative 2 years,and 1.155?0.210 at 3 years(P