Digital Preoperative Planning And Surgical Simulation Of Three-dimensional Visualization In Ankylosing Spondylitis Of Thoracolumbar Kyphosis Correction Surgery

PartⅠDigital preoperative planning in ankylosing spondylitis of thoracolumbar kyphosis correction surgery【Objective】Design ankylosing thoracolumbar kyphosis after osteotomy of the results of predicti- on software, and test their accuracy【Methods】From February1997to January 2007, Vertebral osteotomy through the pedicle was performed on 118 patients with ankylosing spondylitis of thoracolumbar kyphosis. Patients were examined standing position spine X-ray film before surgery,We have measured X-ray every patient's X-ray: high arch, arch of the anterior one-third of the length, kyphosis angle, and we recorded results of biochemical tests, erythrocyte sedimentation rate and blood tests.With Access 2000 database (Microsoft Corporation), we have entered the clinical data to classify screening, in accordance with ankylosing spondylitis of thoracolumbar kyphosis standard orthopedic surgical indications. First of all, we can infer whether the tolerance to surgery, and then we calculated the number's Vertebralof surgery and increase body height postoperative, according to patient's spine measurements for suitable patients. Finally, we compare the prediction of computer software and the actual measurement of whether there is statistical significance.【Results】118 cases were flollowed up 1 to 6 years (averaging 4.3 years). The actual measured height in patients were increased height of 16±7.8cm,and spinal kyphosis were corrected 57.6±11.8°, each Vertebral osteotomy were 34.2±6.9°after surgery; Computer software were forecast to increase height of 17.8±8.2cm, and spinal kyphosis were corrected 58.8±12.7°, each Vertebral osteotomy were 35.4±7.7°after surgery。Computer software's forecast and the actual measurement is no statistically significant difference.【Conclusions】Ankylosing spondylitis of thoracolumbar kyphosis is characterized by great circle thoracolumbar kyphosis, little scoliosis and rotation, are relatively easy to measure, Multi-segmental vertebral osteotomy through the pedicle were used in ankylosing spondylitis of thoracolumbar kyphosis orthopedic strong regularity, and uniform designs are suitable for the study of the possibility of computer applications. Computer software which we designed can accurately predict ankylosing spondylitis correction of thoracolumbar kyphosis in patients with increased height and the angle of correctionPartⅡSurgical simulation of three-dimensional visualization in ankylosing spondylitis of thoracolumbar kyphosis correction surgery【Objective】Explore ankylosing spondylitis of thoracolumbar kyphosis surgery orthopedic surgery simulation of three-dimensional visualization.【Methods】 A 25-year-old patients with ankylosing spondylitis, we implemented vertebral osteotomy of T12 and L2 by the pedicle to correct kyphosis of thoracolumbar spine we used software which we designed to forecast increase the height of patients preoperative and vertebral body to prepare the number of operations, then we used CT scanning of spinal thin-layer, and used three-dimensional reconstruction of spinal by Mimics software, we simulated the operation by the pedicle in the anterior 1 / 3 osteotomy and the pedicle cortex front vertebral osteotomy by Mimics software.【Results】Simulated by the pedicle in the anterior 1 / 3 osteotomy can be visually displayed after osteotomy in patients with orthopedic effect【Conclusions】Virtual osteotomy can be visually displayed after every part of the orthopedic effect of osteotomy.Simulation vertebral body front osteotomy by the vertebral pedicle is more similar to actual effect of osteotomy with simulated anterior 1 / 3 osteotomy osteotomy comparison...