spine surgery craniovertebral spine discectomy lumbar disc herniation cervical spine surgery cervical laminoplasty anterior cervical corpectomy anterior cervical discectomy cervical spine cord compression cervical spondylotic myelopathy surgical anatomy vertebral artery transarticular screws goel laheri occipitocervical fusion harms fusion c2 pedicle screws anatomy ebm randomised controlled trial critical appraisal evidence based medicine degenerative spondylolisthesis adult spondylolisthesis basilar invagination transoral surgery spinal instrumentation paraplegia treatment pedicle screws diagnosis tuberculosis examination scoliosis india evidence sciatica preoperative planning 3d printing orthopaedic surgery technology
Ver mais