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    Effects of bilateral knee arthroplasty on sagittal spinopelvic balance in patients with primer degenerative osteoarthritis
    (2020) Batıbay, Sefa; Akgül, Turgut; Koca, Hüseyin; Çamur, Savaş; Kaya, Özcan; Bayram, Serkan; Sağlam, Necdet
    Aim: We aimed to evaluate the change in sagittal spinopelvic parameters in knee osteoarthritis patients without prior degenerative spinal disease following bilateral knee arthroplasty. Knee osteoarthritis often causes knee flexion contracture and the flexion contracture may affect posture and lumbar lordosis. Material and Methods: We performed a retrospective study by evaluating the records of patients who have undergone bilateral knee arthroplasty in our clinic between 2012 and 2016 in patients due to degenerative bilateral knee osteoarthritis and minimum 12 months follow up. Patients with prior hip surgery, prior spine surgery, rheumatic disease and postoperative flexion contracture were excluded. Lumber lordosis, sacral slope, pelvic tilt and pelvic incidence were measured on lateral lumbosacral view in supine position pre-postoperatively and compared with paired T test. Extension deficit was also measured preoperatively. Results: This study includes 83 patients (77 females and 6 males) who underwent bilateral knee arthroplasty and matched the inclusion and exclusion criteria. The average age at the time of first total knee arthroplasty was 64.4 years. Mean follow up was 37.3(12-66) months. The mean lumber lordosis was 43.9° preoperatively and 49.6° postoperatively. The increase in lumbar lordosis angle was statistically significant (p: 0,001). These changes were only related to the degree of extension deficit but not to age and postoperative follow-up time. Sacral slope, pelvic incidence and pelvic tilt did not change significantly. Conclusion: Bilateral knee arthroplasty increased lumbar lordosis patients with primer degenerative osteoarthritis especially who had high extension deficit. Sacral slope and pelvic tilt were decreased postoperatively but not significantly changed.
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    Palliative posterior instrumentation versus corpectomy with cage reconstruction treatment for thoracolumbar pathological fracture
    (Korean Soc Spine Surgery, 2019) Bayram, Serkan; Akgül, Turgut; Altan, Murat; Pehlivanoğlu, Tuna; Kaya, Özcan; Özdemir, Mustafa Abdullah; Sar, Cüneyt
    Study Design: Single-center, retrospective cohort study. Purpose: We aimed to evaluate and compare the clinical outcomes in patients who underwent palliative posterior instrumentation (PPI) versus those who underwent corpectomy with cage reconstruction (CCR) for thoracolumbar pathological fracture. Overview of Literature: The requirement for anterior support after corpectomy has been emphasized in the treatment of pathological fractures of the vertebrae. However, for patients with a relatively short life expectancy, anterior reconstruction may not be required and posterior instrumentation alone may provide adequate stabilization. Methods: A total of 43 patients with metastases of the thoracolumbar spine underwent surgery in the department of orthopaedic and traumatology of Istanbul University Faculty of Medicine from 2003 to 2016. Surgical outcomes were assessed on the basis of survival status, pre- and postoperative pain, complication rate, and operation time. Results: PPI was performed for 22 patients and CCR was performed for 21 patients. In the PPI group, the follow-up period of the five surviving patients was 32 months. The remaining 17 patients died with a mean survival duration of 12.3 months postoperatively. In the CCR group, the five surviving patients were followed up for an average of 14.1 months. The remaining 16 patients died with a mean survival duration of 18.7 months postoperatively. No statistically significant difference (p=0.812) was noted in the survival duration. The Visual Analog Scale scores of the patients were significantly reduced after both procedures, with no significant difference noted on the basis of the type of surgical intervention (p>0.05). The complication rate in the CCR group (33.3%) was higher compared with that in the PPI group (22.7%); however, this difference was not noted to be statistically significant (p=0.379). The average operation time in the PPI group (149 minutes) was significantly shorter (p=0.04) than that in the CCR group (192 minutes). Conclusions: The PPI technique can decompress the tumor for functional improvement and can stabilize the spinal structure to provide pain relief.