AIM: To investigate high-intensity zone (HIZ) changes after lumbar posterior dynamic instrumentation. MATERIAL AND METHODS: Our study included 53 @entity1 : 27 @entity1 in group 1, 26 @entity1 in group 2. All @entity1 had one or two levels of @entity179 with an HIZ confirmed by magnetic resonance imaging (MRI). Group 1 underwent one- or two-level dynamic lumbar posterior instrumentation. Group 2 was treated conservatively with an exercise program. @entity1 were evaluated using MRI, a numerical visual analog @entity158 scale (VAS), and the @entity717 Index (ODI) at baseline, at 1 year after surgery, and at final follow-up evaluation. RESULTS: The mean duration of follow-up was 49.3 months in group 1 and 47.19 months in group 2. The baseline VAS and ODI scores were similar for both groups. The mean VAS score of group 1 was significantly improved at 1 year after surgery and at final follow-up. The mean ODI value was lower in group 1 than in group 2 at 1 year and at final follow-up. Pfirrmann grades in group 1 significantly differed at 1 year and at final follow-up but did not change in group 2. The number of HIZs significantly decreased in from baseline to 1 year and from baseline to final follow-up in group 1 but did not differ in group 2. CONCLUSION: Dynamic lumbar stabilization systems are promising. Observations such as Pfirrmann grade improvements and disappearance of HIZs are concordant with improvements in VAS and ODI scores demonstrate that dynamic stabilization systems may provide an environment for regeneration.

Effect of Posterior Dynamic Instrumentation on High-Intensity Zone in Lumbar XXXX .

@entity1 :: ('9606', 'Species') :: ['Patients', 'patients'] @entity717 :: ('MESH:D009069', 'Disease') :: ['Oswestry Disability'] @entity179 :: ('MESH:D019636', 'Disease') :: ['degenerative disc disease'] @entity158 :: ('MESH:D010146', 'Disease') :: ['pain']
@entity179 :: (MESH:D019636,Disease) :: ['Degenerative Disc Disease']
