Biomedical subjects

M Aebi

Publications and source records attributed to M Aebi.

182 records · Page 11Linked to original sources

PubMedDate not supplied

Stabilization of the lower thoracic and lumbar spine with the internal spinal skeletal fixation system. Indications, techniques, and first results of treatment.

Since 1984, 30 patients with burst fractures of the lower thoracic and lumbar spine were treated with AO internal spinal skeletal fixation system. All patients in this series had a minimum follow-up of 12 months. This new instrumentation is a posterior intrapedicular system developed by Dick in 1982. It allows stable fixation that is limited only to adjacent spinal segments. The internal fixator permits reduction in all three planes. Independently, it is possible to add distraction or compression to the involved segments. It also is able to reduce effectively the "middle column" which is thought to be accomplished by "ligamentotaxis." In this series there were 16 neurologically intact patients and 14 with partial or complete neurologic injury. There were two minor instrumentation loosenings early in the series. Most patients in this series had a near-anatomic reduction of all three columns in the involved segment. It was also possible to re-establish the normal lordosis of the lumbar spine. The device provided sufficient rigid fixation for rapid postoperative mobilization in a light external orthosis.

Adult↗

PubMedDate not supplied

Modification of the original Luque technique in the treatment of Duchenne's neuromuscular scoliosis.

Luque segmental instrumentation with Galveston technique for pelvic fixation is generally used in the correction of Duchenne's neuromuscular spinal deformities with pelvic obliquity. Particularly difficult is the control of the lumbopelvic junction. Instrumentation failures and only mediocre correction of pelvic obliquity are reported. To obtain better sacropelvic anchorage and to improve pelvic correction, this technique was modified with the introduction of sacral screws in each S-1 pedicle and a device for transverse traction between the caudal right-angle bends of the L-rods. From 1988 and 1993, 25 consecutive patients (mean age, 14 years) were operated on using this technique. Before surgery, mean spinal deformity measured 68 degrees (range, 46-90 degrees), and pelvic obliquity, 21 degrees (range, 7-45 degrees). At the last examination (mean follow-up, 36 months), mean spinal curvature was 18 degrees (range, 3-37 degrees), and pelvic obliquity was always <15 degrees (range, 0-15 degrees) with mean correction of 75%. No instrumentation failure or loss of correction >3 degrees could be observed in the entire series. In every patient, a good sitting balance could be restored after surgery.

Adolescent↗