Semi-rigid minimally invasive transpedicular fixation in the treatment of degenerative diseases of the lumbar spine
The study objective is to analyze the effectiveness of the use of minimal invasive polyetheretherketone (PEEK) rod systems in the treatment of lumbar spine degenerative diseases.Materials and methods. The minimal invasive semi-rigid stabilization using PEEK rod systems was performed in 24 patients (4 (17 %) male and 20 (83 %) female) patients (mean age 46.3 ± 8.4, ranging from 32 to 63). The average follow-up duration was 15 months. Inclusion criteria: mechanical low back pain, White–Panjabi instability: 5 points, degenerative changes of the disc by C. Pfirrmann scale: II–IV grade. Follow-up at the 6 and 12 months postoperatively.Results. In the postoperative period, the majority of patients had a complete or significant regression of pain (on average, from 6.3 to 1.8 points on the visual analog scale). The Oswestry disability index decreased from 64/66 [64; 68] to 33/34 [32; 36] in 6 months (p <0.001) and 18/17 [16; 18] in 12 months (p <0.001). Before surgery, the height of the operated disk was 0.96 cm, after 1 year decreased to 0.91 cm. Range of rotary motion in the operated segment in all cases did not exceed 6°.Conclusion. The PEEK rod fixation in patients with mechanical low back pain provides good and excellent clinical results on the I. Macnab scale in 83.4 % of cases. Within 12 months, the minimal volume of movements on the operated segment remains, without signs of continued degeneration of adjacent intervertebral discs.