Related Experiment Video
Updated: Jan 23, 2026

Modified Posterior Vertebral Column Resection for Patients with Thoracolumbar Kyphotic Deformity
Published on: September 16, 2022
[Pedicle subtraction osteotomy to correct rigid deformities]
L Viezens1, S Sehmisch2, W Lehmann2
1Klinik für Unfallchirurgie, Orthopädie und Plastische Chirurgie, Universitätsmedizin Göttingen, Robert-Koch-Straße 40, 37075, Göttingen, Deutschland. lennart.viezens@med.uni-goettingen.de.
Objective:
The aim of the surgery is to restore the sagittal profile in the event of a mismatch of the patient's spinopelvic parameters and high patient suffering.
Indications:
Clinically symptomatic sagittal imbalance due to degeneration, trauma or after spinal surgery which can not be adequately treated by conservative therapy.
Contraindications:
Severe general disease of the patient; local or systemic inflammation.
Surgical Technique:
A dorsal approach is used to resect the dorsal vertebral structures and to perform an osteotomy to the anterior edge of the spine.
Postoperative Management:
Rest with a load limit of 5 kg for 3 months. Prohibition of deep sitting for this time.
Results:
The pedicle subtraction osteotomy is described in the literature as a reliable method for the treatment of sagittal imbalance. The high rate of described complications should be discussed preoperatively with the patient.
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Consider two children sitting on a seesaw, which has negligible mass. The first child has a mass (m1) of 26 kg and sits at point A, which is 1.6 meters (r1) from the pivot point B; the second child has a mass (m2) of 32 kg and sits at point C. How far from the pivot point B should the second child sit (r2) to balance the seesaw?

