The pedicle subtraction osteotomy (PSO) is typically performed at L3 as these vertebrae are the normal apex of lumbar lordosis. It is also safer to perform the osteotomy at one of these levels, as they are caudad to the conus medullaris. The technique involves a transpedicular vertebral wedge resection extending from the posterior elements ...

A pedicle subtraction osteotomy (PSO) is a surgical procedure used in adults and children to correct certain deformities of the spine. A spine with too much kyphosis (forward curvature, or “hunchback”) or too little lordosis (inward curvature, or “swayback”) can be corrected with a PSO.

2024年6月3日 · Pedicle subtraction osteotomy has been thoroughly described and studied over the past 2 decades, being applied mainly in the lumbar spine, followed by the thoracic spine. Our better understanding of alignment biomechanics, and the progressive refinements of the surgical technique over time made it a very efficient procedure for the management ...

2014年5月7日 · Pedicle subtraction osteotomy (PSO) consists of creating posteriorly trapezoidal shape of a vertebra, usually L3 or L4, in order to recreate lordosis in the lumbar spine. It is usually indicated to treat rigid kyphotic lumbar spine associated with sagittal imbalance and due to degenerative changes or to iatrogenic flat back.

Pedicle subtraction osteotomy. PSO is a technique where posterior elements and pedicles are removed, and a triangular wedge through the pedicles is removed either with a de-cancellation technique or an osteotome. The posterior spine is shortened by closing the osteotomy using the anterior cortex as a hinge . Fig. 3.

2023年12月1日 · The use of the term “three column osteotomy” (3CO) has become commonplace within the ASD surgical community the past 2 decades. 3CO's refer to two specific surgical techniques: pedicle subtraction osteotomy (PSO) and vertebral column resection (VCR).

2014年12月9日 · Lumbar pedicle subtraction osteotomy (PSO) is indicated in the treatment of large sagittal (more than 25° of rigid loss of lordosis) deformities of the lumbar spine or its combination with coronal deformity, especially when they are rigid.

2024年8月4日 · Compared to L3-PSO, the L2-, L4-, and L5-PSO models showed up to 67%, 61%, and 78% reduced stresses at the UIV, respectively. Minimum stress at UIV+ was observed in the L3-PSO model. The L2-and L3-PSOs showed the maximum PSO force. The L5-PSO model showed the lowest stresses on the primary rods in all motions.

2009年3月2日 · A pedicle subtraction osteotomy has the advantages of obtaining a correction through three columns from the posterior approach without lengthening the anterior column, thereby maximizing the healing potential while avoiding stretching the major vessels and viscera anterior to the spine 28.

2014年5月7日 · Pedicle subtraction osteotomy (PSO) consists of creating posteriorly trapezoidal shape of a vertebra, usually L3 or L4, in order to recreate lordosis in the lumbar...