Person: UZER, GÖKÇER
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Publication Open Access Comparison of two types of proximal femoral hails in the treatment of intertrochanteric femur fractures(2015-09-01) Uzer, GÖKÇER; Elmadag, NUH MEHMET; Yildiz, FATİH; Bilsel, Kerem; Erden, TUNAY; Toprak, HÜSEYİN; UZER, GÖKÇER; ELMADAĞ, NUH MEHMET; YILDIZ, FATİH; BİLSEL, İSMAIL KEREM; ERDEN, TUNAY; TOPRAK, HÜSEYİNBackground: Hip nailing is frequently used to treat unstable intertrochanteric femoral fractures (ITF) in elderly patients. In this retrospective study, we compared the functional and radiological results, and the complications, of patients treated using proximal femoral nails (PFN) with an integrated, interlocking, compression lag screw, or two separate lag screws, which allow linear compression at the fracture site. Methods: A total of one hundred and eighteen patients were operated on for AO/OTA 31-A2 ITF between May 2010 and April 2012, and eighty-two of these patients, for whom sufficient follow-up data and documentation were available, were included into the study. PFNs with interlocking, integrated lag screws (Group I) were used in forty-four patients, and PFNs with two separate lag screws (Group II) in thirty-eight. Outcome parameters were the extent of varus collapse and leg length discrepancy on radiographs, and the Western Ontario and McMaster Universities Arthritis Index (WOMAC) and Harris hip scores (HHS) as functional results. Results: Mean follow-up duration was 20 months (range, 12-36 months); fractures healed in all patients. Mean varus collapse values were 2.03±5.68° and 5.21±5.27° (p=0.01), Harris hip scores 73.2±11.65 and 74.72±11.15 (p=0.54), and WOMAC scores 70.78±11.41 and 71.78±11.19 (p=0.69) in Groups I and II, respectively. No difference was detected between the groups in terms of outcome parameters or complication rate. Conclusion: In the treatment of ITF, PFNs with an integrated, interlocking, compression lag screw, or two separate lag screws did not differ in terms of functional and radiological results or complication rate.Publication Open Access Safety of modified Stoppa approach for Ganz periacetabular osteotomy: A preliminary cadaveric study(2016-08-01T00:00:00Z) Elmadag, Mehmet; Uzer, GÖKÇER; Yildiz, FATİH; CEYLAN, Hasan H.; Acar, Mehmet A.; ELMADAĞ, NUH MEHMET; UZER, GÖKÇER; YILDIZ, FATİHObjective: The aim of this cadaveric study was to investigate the efficacy of the modified Stoppa approach in Ganz periacetabular osteotomy (PAO). Methods: The Ganz PAO was performed on 10 hemipelvises with normal hips, from 5 cadavers using the modified Stoppa approach through the Pfannenstiel incision. All of the osteotomies were performed under fluoroscopic control and direct visualizing the osteotomy site from the same incision. After the osteotomy, the acetabulum was medialized and redirected anterolaterally, and fixed with 2 screws. The neurovascular structures and the joints were examined by dissecting the soft tissues after fixation of the osteotomies. Outcome parameters were center-edge (CE) angle, the distances between the osteotomy and anterior superior iliac spine (ASIS), and between the osteotomy and the sciatic notch, neurovascular and joint penetrations. Results: After the osteotomy, the mean CE angle was improved from 19.8 degrees to 25.2 degrees, mean distance between the osteotomy and ASIS was 3.1 cm, and the mean distance between the osteotomy and the sciatic notch was 10.2 mm. The neurovascular structures and the joints were examined by dissecting the soft tissues after fixation of the osteotomies. No damage to the joint, surrounding arteries, veins or nerves was detected in any of the cadavers. Conclusions: Bilateral dysplastic hips can be treated with a 10 cm, cosmetically more acceptable incision in the same session using this approach. Quadrilateral surface of the acetabulum can be directly seen using this approach and the osteotomy can be safely performed. (C) 2016 Turkish Association of Orthopaedics and Traumatology. Publishing services by Elsevier B.V.Publication Open Access Cytotoxicity of a new antimicrobial coating for surgical screws: an in vivo study(2017-01-01) Guzel, Yunus; Elmadag, Mehmet; Uzer, GÖKÇER; Yildiz, FATİH; Bilsel, Kerem; Tuncay, Ibrahim; ELMADAĞ, NUH MEHMET; UZER, GÖKÇER; YILDIZ, FATİH; BİLSEL, İSMAIL KEREM; TUNCAY, İBRAHİMhe risk of surgery-related infection is a persistent problem in orthopaedics and infections involving implants are particularly difficult to treat. This study explored the responses of bone and soft tissue to antimicrobialcoated screws. We investigated whether such screws, which have never been used to fix bony tissues, would result in a cytotoxic effect. We hypothesised that the coated screws would not be toxic to the bone and that the likelihood of infection would be reduced since bacteria are not able to grow on these screws. METHODS Titanium screws were inserted into the left supracondylar femoral regions of 16 rabbits. The screws were either uncoated (control group, n = 8) or coated with a polyvinylpyrrolidone-polyurethane interpolymer with tertiary amine functional groups (experimental group, n = 8). At Week 6, histological samples were obtained and examined. The presence of necrosis, fibrosis and inflammation in the bony tissue and the tissue surrounding the screws was recorded. RESULTS Live, cellular bone marrow was present in all the rabbits from the experimental group, but was replaced with connective tissue in four rabbits from the control group. Eight rabbits from the control group and two rabbits from the experimental group had necrosis in fatty bone marrow. Inflammation was observed in one rabbit from the experimental group and five rabbits from the control group. CONCLUSION Titanium surgical screws coated with polyvinylpyrrolidone-polyurethane interpolymer were associated with less necrosis than standard uncoated screws. The coated screws were also not associated with any cytotoxic side effect.Publication Open Access Bilateral Complete-type Medial Discoid Meniscus(2015-12-01T00:00:00Z) Uzer, GÖKÇER; Yildiz, FATİH; PULATKAN, MEHMET ANIL; Elmadag, NUH MEHMET; UZER, GÖKÇER; YILDIZ, FATİH; PULATKAN, MEHMET ANIL; ELMADAĞ, NUH MEHMETDiscoid meniscus is an uncommon congenital anomaly, and it is rarely seen in the medial compartment of the knee. Literature about bilateral medial discoid meniscus pathology is also limited because one of the knees is usually asymptomatic, although the pathology bilaterally exists. The incidence of bilateral cases should be more than that in current literature because of a number of non-diagnosed cases. In this study, we discuss the approach for a patient with one-sided symptomatic bilateral medial discoid meniscus and present partial meniscectomy as a treatment method.Publication Open Access Comparison Between Y- and S-Shaped Incisions for Open Reduction and Hook-Plate Fixation of the Mallet Finger(2017-04-01) Uzer, GÖKÇER; Yildiz, FATİH; Kapicioglu, MEHMET; Elmadag, Mehmet; Kara, DENİZ; Bilsel, Kerem; UZER, GÖKÇER; YILDIZ, FATİH; KAPICIOĞLU, MEHMET; KARA, DENİZ; BİLSEL, İSMAIL KEREMObjective: This study evaluates the results of open reduction and hook-plate fixation in the treatment of osseous mallet finger and compares S-and Y-shaped incisions used for the approach. Methods: Twenty-eight patients treated for osseous mallet finger using open reduction and hook-plate fixation were divided into two groups according to their incisions types (group I: S-shaped, n= 18; and group II: Y-shaped, n= 10). Functional results at the first year of follow-up and complications were evaluated. Results: All fractures healed. In group I, all patients had excellent results; in group II, nine patients had excellent results, and one patient had fair results. The numbers of complications were two in group I and six in group II. Conclusion: Hook-plate fixation is a successful treatment method for osseous mallet finger. The rate of complications can be decreased using an "S-shaped" incision with this technique. However, patients should be informed about possible skin problems and nail deformities.