[Objective]To retrospectively analyze efficacy and complications of lumbar transpedicular osteotomy combination pedicle screw system for correction of kyphosis in ankylosing spondylitis. [Method]From Jan 1998 to Dec 2007,54 patients of ankylosing spondylitis with kyphotic deformity were treated with surgery.Forty eight patients were followed up,and time was 6 to 36 months.Preoperative and postoperative Chin-brow vertical angle and Cobb's angle were measured.The outcome was evaluated according to pose correction,visual field improvement and back pain relief in follow-up.The results were divided into being excellent,good,fair and poor.[Result]The mean Chin-brow vertical angle was corrected from preoperative 59? to postoperative 16?,and the Cobb's angle from 43? to 11?.All patients could walk with forward vision and sagittal balance and gait were improved significantly.The symptom of dyspepsia and respiratory limitation relieved.The excellent outcome was attained in 45 cases(93.75%),the good in 3 cases(6.25%).[Conclusion]Lumbar transpedicular osteotomy combined with fixation of pedicle screw system was a safe and effective method for treatment of kyphosis in ankylosing spondylitis.

[Objective]To investigate the manner and the key of reoperation for failed back surgery syndrome(FBSS).[Method]Twenty reoperated FBSS cases were investigated retrospectively.The data about the history,physical sign,image and exploration were analyzed.The treatment protocols were made correspondingly.Twenty cases were all operated with decompression of nerve root and dura assisted with fusion of auto-bone kraft between posterior arches of vertebra.In them,12 cases who were suffered from spinal instability were treated with pedicle screw fixation supplementarily.All patients were rehabilitated after operation.[Result]The complications included neural root injury in 1 case and tear of dural cyst in 3 cases.The outcome was evaluated according to the standard of Ragab's,10 cases were excellent,5 cases good,2 cases fair and 1 case poor.The rate of excellent and good was 85%.[Conclusion]FBSS is a complication of back surgery manifesting as a syndrome with multi-factor and multi-present.We should analyze the clinical present of patient integratively to find out the cause before operation,and map out appropriate operational protocol.

[Objective]To observe the clinical results of adjustable hollow titanium artificial vertebra in the treating of tumor,tuberculosis and severe burst fracture of the thoracic and lumber vertebra.[Method]Totally 169 cases of thoracolumbar fractures were treated,including 64 cases of tumor,66 cases of tuberculosis and 39 cases of severe burst fracture of the thoracic and lumber spine,of which 57 cases with kyphosis of those Cobb's angle was 27.1~65.4 degrees with a mean(38.5?10.7)degrees,were treated by one-stage procedure,including pathologic vertebral resection,anterior interbody reduction and implant adjustable hollow titanium artificial vertebral body,anterior internal fixation or posterior transpedicular fixation,reconstruction of spinal stability.For anterior stabilization,the Centaur plate system,Z-plate and XIAⅡrod-screw spinal system were used.Relief of the pain,the function of spinal cord or nerve,kyphosis collection and spinal stability were monitored.[Result]Postoperatively,the period of follow-up lasted 12 months to 46 months with a mean of 32 months.All these patients had their incision healed by first intention,and no recurrence was noted in those patients of tumor and tuberculosis.All patients experienced significant palliation local pain,and 73 patients showed improved neurological status(at least one grade improvement on Frankel's functional classification).The instrumentation provided immediate stability and protected against development of kyphotic deformity in all patients.Postoperative radiological evaluation revealed that implants were stable,there was no phenomena of prosthesis subsidence,hook dislodgment and failure restoration of spinal segments height.Solid bony fusion was obtained in all patients.The residual kyphotic deformity had been corrected by(31.6?8.3)degrees with a mean(6.2?8.7)degrees after operation.[Conclusion]Pathologic vertebral resection,artificial vertebral body replacement and internal fixation are ideal treatmens in thorough decompression,release of pain,reconstruction of spinal stability and resume of spinal sequence.

BACKGROUND:Anterior cervical plate can maximize the intervertebral space height,expand intervertebral foramen,restore cervical physiological antecurvature,prevent instability due to implant micromovement,and increase graft fusion.However,the selection of entire autologous bone or Ti-mesh bone graft remains uncertain in application of anterior cervical plate.OBJECTIVE:To compare the complications of three different intervertebral fusion methods in anterior cervical decompression surgery.METHODS:A total of 92 cases of cervical spondylotic myelopathy were treated by anterior cervical decompression and three different intervertebral fusion methods.They were followed up for at least 3 months.Of them,6 underwent bone grafting alone,21 underwent autogenous bone graft with cervical plate-screw fixation,and 65 underwent pyramesh with anterior cervical plate-screw fixation.Complications were observed in all cases.RESULTS AND CONCLUSLON:A total of 2 of 6 autogenous bone grafting cases suffered from graft bone dislocation,1 suffered from pseudoarthrosis formation,and 1 suffered from donated ilium.Six of 21 autogenous bone graft with cervical plate-screw fixation suffered from loss of intervertebral height,and 3 suffered from pain of donated ilium.Eleven of 65 pyramesh with anterior cervical plate-screw fixation suffered from titanium mesh subsidence,1 case suffered from breakage of fixation screw.Simple autogenous bone grafting surgery was rarely used due to long duration of external fixation and too much complications.Autogenous bone grafting with anterior cervical plate-screw fixation surgery has shortage of grafted bone absorption and pain of donated ilium.Pyramesh with anterior cervical plate-screw fixation surgery overcomes the shortage of donated iliac pain,but remains the shortage of titanium mesh subsidence and lose of intervertebral height.

BACKGROUND:Degenerative lumbar scoliosis often appeared in the elderly, who may combine with other diseases, which can cause poor repair tolerance. Degenerative lumbar scoliosis commonly has a responsible vertebral body, so local decompression and selective fusion should be conducted. This can achieve nerve decompression, spinal stability, and is relatively minimaly invasive. OBJECTIVE:To explore the efficacy of selective interbody fusion, limited neural decompression combined with pedicle screw system fixation for degenerative lumbar scoliosis. METHODS:Clinical characteristics of 53 patients with degenerative lumbar scoliosis were retrospectively analyzed, and the indication and contraindication were investigated. Selective interbody fusion, and limited neural decompression combined with pedicle screw system fixation were performed in the patients. Treatment effect and complication were analyzed. During folow-up, Suk standard was utilized to judge bone graft fusion. Before treatment and during final folow-up, lower back pain score system recommended by the Japanese Orthopaedic Association was used for assessment, and the excelent and good rate of curative effects was calculated. Cobb’s angle on the sagittal and coronal positions was compared and analyzed before and after treatment. RESULTS AND CONCLUSION:The patients were folowed up for 12 to 36 months. According to low back pain score of Japanese Orthopaedic Association Scores, the excelent and good rate of curative effect was 89% during the last folow-up. According to Suk standard, the fusion rate of vertebra was 94%. The last X-ray films revealed that Cobb’s angle was averagely (4.3±2.3)° (0°-13.5°) on the coronal plane after treatment, and the correction rate of scoliosis was 56%. The Cobb’s angle was averagely (45.1±12.5)° (10.4°-65.3°) after treatment, and the correction rate of lordosis was 36%. Complications after repair consisted of cerebrospinal fluid leakage in two cases, nerve injury in two cases, instrumental failure in one case, and pulmonary infection in one case, and symptomatic deep venous thrombosis in three cases. These findings suggest that selective interbody fusion, and limited neural decompression combined with pedicle screw system fixation were effective and safe for degenerative lumbar scoliosis. The sequence of the lumbar vertebra on the coronal and the sagittal planes received reconstruction to different degrees, and could realize the stability of the lumbar vertebrae in the scoliosis.