engleski

Sagittal Plane Alignment in Standing Patients Who Underwent Hook- Rod With Pedicle Screw Fixation of Unstable Burst Thoracolumbar- Lumbar Fractures

BACKGROUND. Pedicle screw fixation has become standard technique for fixation of unstable burst fractures. Late results obtained in patients with pedicle screw fixation (PSF) showed kyphotic deformity and pain. Posterior hybrid fixation (PHF) was designed to prevent recurrent kyphosis by strengthening of posterior assembly without doubling invasiveness of the procedure. An in vitro study showed that PHF is significantly stiffer than the PSF and comparable with anterior fixation. A preliminary clinical study proved that PHF can secure effective spinal fixation until bone healing. AIM. To compare spinal posture of patients who had undergone PHF with healthy volunteers. PATIENTS. Inclusion criteria: unstable thoracolumbar and lumbar fractures load sharing 7 or more. neurodecompression inside the first 8 hours, spinal fixation using PHF technique, and follow-up 2 years. Exclusion criteria: total senso-motor deficit (ASIA A) and delay in neurodecompression. Control group: subjects matched for gender and age (&#61617 ; 6 months) without history of back pain and spinal injury. METHODS: Surgical technique was previously described (1). Device adjustment consists of distraction with short segment hook-rod system and correction of kyphosis by connection of pedicle screws with rod in neutral position (Fig. 1L). Prior to sagittal plane alignment investigation, hardware was removed in all patients.

Pedicle screw fixation; Posterior hybrid fixation; sagittal plane alignment

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