Özet:

Objective: One of the most effective treatment methods for degenerative lumbar spine pathologies is fusion surgery. However, after fusion surgery, adjacent segment disease (ASD) status may occur. Our aim in this study was to evaluate the relationship between hybrid rod use and ASD and to contribute to the literature. Materials and Methods: Patients who came to our clinic with various etiologies and underwent lumbar spinal fusion between January 2017 and June 2022 were examined in this study. Retrospective analysis was performed on factors, such as demographic characteristics of the patients, etiology, preoperative imaging, a type of rod used during surgery, development of ASD in the postoperative period, and reoperation. Results: There were 53.5% (n=85) female cases and 46.5% (n=74) male cases. In all cases, the mean age was 59.5 years (38-69). In group A (n=72), which used a rigid rod, 54.2% (n=39) of the cases were female, and 45.8% (n=33) were male. There were 58 patients in this group who had three or fewer levels of fusion. Group B (n=87), which used a hybrid rod, had 52.9% (n=46) female cases, and 47.1% (n=41) premature cases. Radiographically, ASD was found in 48.6% (n=35) of group A patients. Because they were symptomatic, 45.7% (n=16) of these cases were reoperated. Radiographically, ASD was found in 25.3% (n=22) of group B patients. Because they were symptomatic, 18.2% (n=4) of these cases were reoperated. Patients with rigid rods were more likely to develop ASD, and they required more reoperations (p<0.05). Conclusion: Patients who undergo degenerative lumbar region fusion surgeries with hybrid rods have less ASD. As more mobile instrumentation techniques are developed in the upper segments, the incidence of ASD in these fusion surgeries will decrease.

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