Abstract:
The outcomes of surgical treatment of 25 young patients with degenerative diseases of the lumbar
spine in two groups were compared in patients with nitinol rods (dynamic stabilization) without spondylodesis and with rigid lumbar fixation of titanium rods.
Men - 12, women - 13, the average age is 17.6 years (from 16 to 21 years). These patients are divided
into 2 groups depending on the stabilization method. Clinical and radiological results were monitored at
least 1 year after the operation.
In our study we used nitinol rods of 2 standard sizes - 60 and 80 mm. The size and curvature of the
bending of the rods is calculated from the average anatomical parameters characteristic of the lumbar
spine and lumbosacral junction.
In all groups, there were no statistically significant differences in preoperative values and in the control periods of observation of the VAS (for both the back and the lower limb), Oswestry and SF-36 between patients with nitinol and titanium rods (p> 0.05).
In both cases (rigid and dynamic stabilization), statistically significant changes were noted in the postoperative period (p <0.01). In both groups, in comparison with preoperative values, improvement was
observed in all control periods, which were highly statistically significant (p <0.01).
When studying the mobility in stabilized segment with dynamic nitinol rods, it is determined that the
mobility, which persists in 1 segment, averages 4.8°. This index is within the limits of measurement error
(up to 5°), however, when measuring mobility in two segments, the mobility is 9.6°.
Transpedicular fixation of the lumbosacral spine with the use of nitinol rods is an effective technology
that allows to keep movements in the lumbosacral spine in combination with a stable fixation. Further
study of this technology should continue, including with reference to deformations of the spine.
