Person: YILDIZ, FATİH
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Publication Metadata only The effect of onlay cortical fibula strut grafts on biomechanical features of Vancouver type B1 periprosthetic femoral fractures(2022-05-01T00:00:00Z) ALIYEV, ORKHAN; ERDEN, TUNAY; SARIYILMAZ, KERİM; Bozdağ, Süreyya Ergün; Sünbüloğlu, Emin; TUNCAY, İBRAHİM; YILDIZ, FATİH; ALIYEV, ORKHAN; ERDEN, TUNAY; TUNCAY, İBRAHİM; YILDIZ, FATİHObjective: This study aimed to investigate biomechanically the effects of onlay fibula grafts on Vancouver Type B1 Periprosthetic Femoral Fractures (PPFs).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 Results of closing wedge osteotomy in the treatment of sagittal imbalance due to ankylosing spondylitis(2016-01-01T00:00:00Z) YILDIZ, FATİH; Akgul, Turgut; Ekinci, Mehmet; Dikici, Fatih; Sar, Cuneyt; Domanic, Unsal; YILDIZ, FATİHObjective: Ankylosing spondylitis is a systemic disease which affects the axial skeleton and may cause rigid spinal deformities in advanced cases. Clinical and radiological results of patients with ankylosing spondylitis who underwent pedicle subtraction osteotomy (PSO) were evaluated.Publication Metadata only Are the functional outcomes really inferior following unicondylar knee arthroplasty in patients with partial-thickness cartilage loss?(2021-11-01T00:00:00Z) Pulatkan, Anil; YILDIZ, FATİH; UÇAN, VAHDET; ELMALI, NURZAT; TUNCAY, İBRAHİM; YILDIZ, FATİH; UÇAN, VAHDET; ELMALI, NURZAT; TUNCAY, İBRAHİMObjective: The main indication for medial Unicondylar Knee Arthroplasty (UKA) is Full-Thickness Cartilage Loss (FTCL) in the isolated medial compartment of the knee. However, controversial outcomes were reported in patients with Partial-Thickness Cartilage Loss (PTCL). The aim of this study is to compare PTCL and FTCL based on intraoperative findings in medial UKA in terms of functional outcomes and complication rates requiring reoperation and revision.Publication Metadata only Effect of nonoperative concomitant intraarticular pathologies on the outcome of arthroscopic capsular release for adhesive capsulitis of the shoulder(2018-07-01T00:00:00Z) YILDIZ, FATİH; Sari, Abdulkadir; Pulatkan, Anil; Ucan, Vandet; Kochai, Alauddin; Bilsel, Kerem; YILDIZ, FATİH; UÇAN, VAHDET; BİLSEL, İSMAIL KEREMObjective: The aim of this study was to investigate whether coexistent intraarticular lesions are negative prognostic factors for the results of arthroscopic capsular release in frozen shoulder patients.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 Metadata only Surgical Management and Outcomes of Patients with Idiopathic Peroneal Spastic Flatfoot A Retrospective Case Series(2023-01-01) UÇAN V.; DEMİREL M.; ALIYEV O.; YILDIZ F.; UZER G.; UÇAN, VAHDET; ALIYEV, ORKHAN; YILDIZ, FATİH; UZER, GÖKÇERBackground: Although tarsal coalition represents the most common cause of peroneal spastic flatfoot, its existence cannot be verified in several cases. In some patients with rigid flatfoot, no cause can be detected after clinical, laboratory, and radiologic examina-tion, and the condition is called idiopathic peroneal spastic flatfoot (IPSF). This study aimed to present our experience with surgical management and outcomes in patients with IPSF.Methods: Seven patients with IPSF, who were operated on between 2016 and 2019, and followed for at least 12 months were included, whereas those with known causes, such as tarsal coalition or other causes (eg, traumatic) were excluded. All patients were followed up for 3 months with botulinum toxin injection and cast immobilization as a routine protocol, and clinical improvement was not achieved. The Evans procedure and grafting with tricortical iliac crest bone graft in five patients and subtalar arthrodesis in two patients were performed. The American Orthopaedic Foot and Ankle Society ankle-hindfoot scale scores and Foot and Ankle Disability Index scores were obtained preoperatively and postoperatively from all patients.Results: On physical examination, all feet manifested rigid pes planus with varying degrees of hindfoot valgus and limited subtalar motion. Overall, the mean American Orthopaedic Foot and Ankle Society and Foot and Ankle Disability Index scores significantly increased from 42 (range, 20-76) and 45 (range, 19-68) preoperatively (P = .018) to 85 (range, 67- 97) and 84 (range, 67-99) (P = .043) at the final follow-up, respectively. No major intraoper-ative or postoperative complications were observed in any of the patients. All computed to-mographic and magnetic resonance imaging scans revealed no evidence of tarsal coalitions in any of the feet. All radiologic workups failed to demonstrate secondary signs of fibrous or cartilaginous coalitions.Conclusions: Operative treatment seems to be a good option in the treatment of patients with IPSF who do not benefit from conservative treatment. In the future, it is recommended to investigate the ideal treatment options for this group of patients. (J Am Podiatr Med Assoc 113(1), 2023)Publication Metadata only Distal femur morphology and the suitability of standard guides for knee arthroplasty in the Turkish population(2024-01-01) İNCESOY M. A.; Güngören N.; Aliyev O.; ELMALI N.; Tuncay İ.; YILDIZ F.; İNCESOY, MUSTAFA ALPER; ELMALI, NURZAT; TUNCAY, İBRAHİM; YILDIZ, FATİHObjective: The aim of this study was to evaluate the posterior condylar angle (PCA) and condylar twist angle (CTA) of the distal femur in the Turkish population and its concordance with the current standard prosthesis guides used in total knee arthroplasty (TKA). Methods: Two hundred and forty knees of 120 Turkish subjects (60 male and 60 female) were included in this study. PCA, CTA, femoral mediolateral lengths (fML), medial femoral anteroposterior lengths (fMAP), lateral femoral anteroposterior lengths (fLAP), distances between the trochlear groove and fMAP (DBTG–fMAP), distances between the trochlear groove and fLAP (DBTG–fLAP), medial posterior condylar cartilage thickness (MPCCT) and lateral posterior condylar cartilage thicknesses (LPCCT) were measured on magnetic resonance imaging (MRI). Results: The median CTA was 7° (range: 0°-13.0°) and the median PCA was 4° (range 0°-11.0°) (P <.0001). The median fML was 79.5 mm (range: 65.7-98.9). The median length of the fMAP was 58.2 mm (range: 46.8-69.0) and the median length of fLAP was 58.2 mm (range: 48.4-73.0). The DBTG–fMAP was 15.2 mm (range: 5.2-23.2), and DBTG–fLAP length was 21.9mm (range: 16.4-29.4). The median MPCCT and LPCCT were 2.4 mm (range: 1.6-3.6) and 2.3 mm (range: 1.2-2.8), respectively. The intraclass correlation coefficient for quantifying interobserver and intraobserver reliability showed excellent agreement regarding the PCA and CTA. Conclusion: This study has shown us that PCA and CTA may be higher in the Turkish population. Although it is not known whether these results have any clinical utility, it may be useful for surgeons to keep this in mind to prevent femoral component malposition. Level of Evidence: Level IV, Diagnostic Study.