Comparison of cervical kinematics between patients with cervical artificial disc replacement and anterior cervical discectomy and fusion for cervical disc herniation.

Background Context: Although anterior cervical discectomy and fusion (ACDF) is an effective treatment option for patients with cervical disc herniation, it limits cervical range of motion, which sometimes causes discomfort and leads to biomechanical stress at neighboring segments. In contrast, cervical artificial disc replacement (ADR) is supposed to preserve normal cervical range of motion than ACDF. A biomechanical measurement is necessary to identify the advantages and clinical implications of ADR.

Microscopic anterior foraminal decompression combined with anterior lumbar interbody fusion.

Background Context: Anterior lumbar interbody fusion (ALIF) with percutaneous pedicle screw fixation (PPF) provides successful surgical outcomes to isthmic spondylolisthesis patients with indirect decompression through foraminal volume expansion. However, indirect decompression through ALIF followed by PPF may not obtain a successful surgical outcome in patients with isthmic spondylolisthesis accompanied by foraminal stenosis caused by a posterior osteophyte or foraminal sequestrated disc herniation. Thus far, there has been no report of foraminal decompression through anterior direct access in the lumbar spine.

Posterior vertebral column resection in fixed lumbosacral deformity.

Study Design: Retrospective study.

Objectives: To report the results and the technique of posterior vertebral column resection (PVCR) in fixed lumbosacral deformity.

Summary Of Background Data: Fixed lumbosacral deformity has gross imbalance as well as progressive compensatory thoracolumbar deformity because of the absence of a mobile spine caudally.

Posterior vertebral column resection for severe rigid scoliosis.

Study Design: Retrospective study.

Objective: To report on the technique and results of posterior vertebral column resection (PVCR) for severe rigid scoliosis.

Summary Of Background Data: The treatment of severe rigid scoliosis is a demanding surgical challenge.

Selective thoracic fusion with segmental pedicle screw fixation in the treatment of thoracic idiopathic scoliosis: more than 5-year follow-up.

Study Design: Retrospective study.

Objectives: To evaluate outcomes of selective thoracic fusion with segmental pedicle screw fixation in thoracic idiopathic scoliosis with a minimum 5-year follow-up.

Summary Of Background Data: Segmental pedicle screw fixation has been proven to enable true segmental control and greater correction both in coronal and sagittal planes of scoliosis.

Direct vertebral rotation: a new technique of three-dimensional deformity correction with segmental pedicle screw fixation in adolescent idiopathic scoliosis.

Study Design: A prospective study.

Objectives: To introduce a new technique, direct vertebral rotation, and to compare the surgical results of direct vertebral rotation with those of simple rod derotation.

Summary Of Background Data: Pedicle screw fixation with a simple rod derotation maneuver enables a powerful coronal and sagittal plane correction in scoliosis surgery.

Anterior-posterior surgery versus posterior closing wedge osteotomy in posttraumatic kyphosis with neurologic compromised osteoporotic fracture.

Study Design: Retrospective study.

Objectives: To compare the surgical results between combined anterior-posterior procedures and posterior closing wedge osteotomy procedures in patients with posttraumatic kyphosis and neurologic compromise secondary to osteoporotic fractures.

Summary Of Background Data: Combined anterior-posterior procedures are usually recommended in cases of kyphotic deformities with neurologic deficit secondary to osteoporosis.

Determination of distal fusion level with segmental pedicle screw fixation in single thoracic idiopathic scoliosis.

Study Design: A retrospective study was conducted.

Objective: To determine the exact distal fusion level in the treatment of single thoracic idiopathic scoliosis (King Types 3 and 4) with segmental pedicle screw fixation.

Summary Of Background Data: Pedicle screw fixation effectively shortens the distal fusion extent by improved three-dimensional deformity correction.

Posterior vertebral column resection for severe spinal deformities.

Study Design: Retrospective study.

Objectives: To report a technique of vertebral column resection through a single posterior approach and its preliminary results in the treatment of moderate to severe spinal deformities with limited flexibility.

Summary Of Background Data: Vertebral column resection is a formidable operation reserved for moderate to severe deformities with limited flexibility.