Person: GÜVENÇ, YAHYA
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GÜVENÇ
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YAHYA
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Publication Metadata only Publication Open Access Evaluation of clinical and radiological outcomes in degenerative lumbar spine disorders treated with peek rod(2023-10-01) KARAGÖZ, AHMET; GÜVENÇ, YAHYA; Günerhan G., Gürpinar I., Çaǧil E., Karadeniz R., Karaman A., Karagöz A., GÜVENÇ Y., Dalgiç A.Objective: This study aimed to evaluate the clinical and radiological outcomes of patients undergoing transpedicular screw and polyetheretherketone (PEEK) rod stabilization for the surgical treatment of degenerative diseases of the lumbar spine. Materials and Methods: A retrospective analysis was conducted on 51 patients diagnosed with degenerative spine disease, such as recurrent disc herniation, spinal stenosis, spondylolisthesis, and adjacent segment disease, who underwent bilateral transpedicular screw-PEEK rod stabilization between May 2017 and November 2020. Preoperative and postoperative assessments included lumbar lordosis angles, sacral slope, pelvic incidence, pelvic tilt, visual analog scale (VAS) scores, PROLO economic and social scores, and the presence of adjacent segments and fusion. Results: The study included 51 patients with a mean age of 62.5 years (range: 18-85 years), with 56.8% (29 patients) being female and 43.2% (22 patients) being male. Surgical procedures involved single-level stabilization in 16 patients, two-level stabilization in 21 patients, three-level stabilization in 9 patients, and four-level stabilization in 5 patients. The mean follow-up period was 52.4 months. Postoperatively, there was a significant reduction in VAS scores from a mean of 8.2±1.3 to 3.4±1.7 (p≤0.01). No significant changes were observed in the lumbar lordosis angle, sacral slope, pelvic tilt angle, and pelvic incidence angle. The mean PROLO score improved from 3.5±1.2 preoperatively to 7.6±1.5 postoperatively. Fusion was observed in 43 patients during the follow-up period. Conclusion: The use of PEEK rods in the surgical treatment of degenerative lumbar spine diseases may lead to improved postoperative quality of life and reduced implant-related complications. Furthermore, our findings suggest that patients without sagittal balance impairment may benefit from PEEK rod stabilization without significant changes in spinal alignment. However, further comparative and long-term studies are required to better understand the efficacy and outcomes of PEEK rod systems in this treatment approach.Publication Metadata only Spinal enstrümantasyon revizyon cerrahisi(Buluş Yayınevi, 2023-05-01) SÖNMEZ, ÖZCAN; TOPAL, BAHADIR; GÜVENÇ, YAHYA; Sönmez Ö., Topal B., Güvenç Y..Publication Open Access Cervical radiculopathy and spinal cord indentation caused by vertebral artery loop(2022-03-01) HARMAN, FERHAT; ALTUNTAŞ, DOĞUKAN; GÜVENÇ, YAHYA; KURŞUN, MELTEM; Bıyıklı E., Kurşun M., Güvenç Y., Harman F., Altuntaş D.Cervical radiculopathy and spinal cord indentation caused by vertebral artery loop formation is a rare entity. We report here an 85-year-old woman had a four-year history of neck pain and left arm weakness. Radiologic evaluation showed vertebral artery loop formation compressing the adjacent nerve root and spinal cord. Accurate radiologic diagnosis of this condition is crucial to reduce unexpected surgical complications.Publication Metadata only Posterior column osteotomy(Thieme (U.S), 2023-12-01) GÜVENÇ, YAHYA; Yaldız C., Güvenç Y., Yaman O..Publication Open Access Effects of pirfenidone on experimental head injury in rats(2022-01-01) GÜVENÇ, YAHYA; Bozkurt I., Ozturk Y., GÜNEY G., Arslan B., GÜLBAHAR Ö., GÜVENÇ Y., Senturk S., YAMAN M. E.Traumatic brain injury (TBI) continues to be a significant public healthcare concern. Neuroinflammation that occurs in the secondary phase of TBI leads to cognitive and physical dysfunction. A number of therapeutic modalities have been evaluated in an attempt to find a suitable treatment. The only drug approved for the treatment of idiopathic pulmonary fibrosis, pirfenidone, has been evaluated for its antifibrotic, anti-inflammatory, and anti-oxidant properties for various disorders, but this is the first study to examine its effects in an experimental TBI model. Twenty-four Wistar rats were randomly divided into three groups: control, trauma, and pirfenidone. The two latter groups underwent experimental diffuse cortical injury mimicking TBI. Neurological assessment was performed using the Garcia test, histological analysis was performed to examine neuroprotective and anti-inflammatory effects, and biochemical analyses of neuron-specific enolase (NSE), S-100B, caspase-3, and thiobarbituric acid reactive substances were performed. The pirfenidone group had a better Garcia test score (P=0.001), an increased anti-inflammatory effect (P<0.001), and an enhanced neuroprotective effect (P=0.007) along with decreased NSE, S100B, and TBARS levels compared to the trauma group. However, pirfenidone did not show a beneficial effect on caspase-3 levels. Pirfenidone may help decrease mortality and morbidity rates after TBI through its anti-inflammatory and antioxidant effects.Publication Metadata only Cervical radiculopathy and spinal cord indentation caused by vertebral artery loop(2022-01-01) BIYIKLI, ERHAN; KURŞUN, MELTEM; GÜVENÇ, YAHYA; ALTUNTAŞ, DOĞUKAN; HARMAN, FERHAT; Bıyıklı E., Kurşun M., Güvenç Y., Altuntaş D., Harman F.Publication Open Access Travmatik torakolomber kırıklı hastalarda intraoperatif nöromonitörizasyon sonuçlarının değerlendirilmesi(2022-10-13) HARMAN, FERHAT; GÜVENÇ, YAHYA; SÖNMEZ, ÖZCAN; YARALI, AHMET TUĞRUL; Harman F., Güvenç Y., Sönmez Ö., Yaralı A. T.Publication Metadata only Posterior atlantoaksiyel stabilizasyonda, atlantoaksiyal eklemin füzyonunun incelenmesi: Bir yıllık takip(2022-10-13) HARMAN, FERHAT; GÜVENÇ, YAHYA; YARALI, AHMET TUĞRUL; SÖNMEZ, ÖZCAN; Harman F., Güvenç Y., Yaralı A. T. , Sönmez Ö.