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YILDIZ, FATİH

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FATİH
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YILDIZ
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2020 - 20227
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Has files: true × Start date: 2020 × End date: 2022 ×

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Now showing 1 - 7 of 7
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    PublicationOpen Access
    Comparison of Small-diameter-hole and Traditional Microfracture in Cartilage Repair and the Effect of Adding a Hyaluronic Acid-based Acellular Matrix Scaffold: An Animal Study
    (2021-03-01T00:00:00Z) UÇAN, VAHDET; YILDIZ, FATİH; ELMADAĞ, Nuh Mehmet; UZER, GÖKÇER; GÜZEL, YUNUS; TOK, OLGU ENİS; Mukaddes, E.; UÇAN, VAHDET; YILDIZ, FATİH; ELMADAĞ, NUH MEHMET; UZER, GÖKÇER; TOK, OLGU ENİS; EŞREFOĞLU, MUKADDES
    Objective: Since, there is no standardized technique for the treatment of focal cartilage defects that can recreate original cartilage tissue; researchers continue to explore and evaluate various treatment modalities. This study compared post-operatke healing of cartilage defects after treatment with small-diameter-hole microfracture (SDHM) technique with that of traditional microfracture technique. The effects of the hole density and augmentation with hyaluronic acid-based acellular matrix (HA-based AM) on cartilage healing were also investigated. Methods: Articular cartilage defects measuring 5 mm in diameter and 3 mm in depth were created in each femoral trochlear groove of 21 New Zealand rabbits. Rabbits were assigned to seven groups comprising six knees each. The rabbits were sacrificed 12 weeks later, and the regenerated cartilage was harvested for histological evaluation using the Wakitani scoring system. Results: All defects were filled with regenerated tissue macroscopically. Group I (14; range 10-14 points) had significantly higher Wakitani score than in groups VI (6; range 1-11 points) and VII (5; range 3-10 points) (p=0.043 and p=0.016, respectively). No significant differences were observed among the other groups. Augmentation with HA-based AM did not contribute to cartilage healing. Conclusion: Improved cartilage healing was observed with increasing SDHM density than with traditional microfracture technique. SDHM combined with HA-based AM implantation did not improve the quality of the regenerated cartilage.
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    PublicationOpen Access
    Sonication of explants enhances the diagnostic accuracy of synovial fluid and tissue cultures and can help determine the appropriate antibiotic therapy for prosthetic joint infections.
    (2022-01-24T00:00:00Z) ALIYEV, ORKHAN; YILDIZ, FATİH; KAYA, HAKAN BATUHAN; Aghazada, AGHAMAZAHIR; SÜMBÜL, BİLGE; Citak, Mustafa; TUNCAY, İBRAHİM; ALIYEV, ORKHAN; YILDIZ, FATİH; KAYA, HAKAN BATUHAN; AGHAZADAA, AGHAMAZAHIR; SÜMBÜL, BİLGE; TUNCAY, İBRAHİM
    Purposes This study aimed to evaluate the sensitivity and specificity of the sonication cultures according to the International Consensus Meeting 2018 criteria and to evaluate the effect of sonication on the antibiotic treatment of patients.
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    PublicationOpen Access
    Reply to Letter to Editor: Safety of one-stage bilateral total knee arthroplasty-one-surgeon sequential vs. two surgeons simultaneous: a randomized controlled study
    (2020-08-01T00:00:00Z) Gungoren, Nurdan; UZER, GÖKÇER; ALIYEV, ORKHAN; YILDIZ, FATİH; ELMALI, NURZAT; TUNCAY, İBRAHİM; UZER, GÖKÇER; ALIYEV, ORKHAN; YILDIZ, FATİH; GÜNGÖREN, NURDAN; ELMALI, NURZAT; TUNCAY, İBRAHİM
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    PublicationOpen Access
    Onlay fibula autografting technique and its comparison with cortical allograft for the reconstruction of periprosthetic bone defects around the femur
    (2020-11-01T00:00:00Z) TUNCAY, İBRAHİM; Tozun, Remzi; ALIYEV, ORKHAN; Dikmen, Goksel; UZER, GÖKÇER; ÖZDEN, Vahit Emre; YILDIZ, FATİH; TUNCAY, İBRAHİM; ALIYEV, ORKHAN; UZER, GÖKÇER; YILDIZ, FATİH
    Background Bone defect around the femur related to revisions or periprosthetic fractures (PFF) is an issue. We present a bone defect reconstruction technique in femoral revisions and/or PFF using fibula autograft and compared our radiological and clinical results to that of allograft. Methods A total of 53 patients who underwent revision hip arthroplasty and/or PFF fixation with the use of cortical fibula autograft (FG group) or cortical allograft (CG group) were evaluated. After exclusions, 20 patients who had minimum two years of follow-up were investigated for each group, for their radiological and clinical outcomes. Results In FG and CG groups, the median ages were 69.5(44-90) and 62(38-88) years, follow-ups were 59(28-72) and 120(48-216) months, defect lengths were seven (1-10) and ten (1-17) cm, and grafts lengths were 16.5(10-30) and 20(12-37) cm, respectively. The rate of graft incorporation was 90% in each group and median time to incorporations were seven (4-12) and 12(6-24) months (p < 0.001), and graft resorption (moderate and severe) rates were 10% and 25% (p = 0.41), respectively. Median Harris Hip (77.6 vs 78.0), WOMAC (23.2 vs 22), SF-12 physical (50.0 vs 46.1), and SF-12 mental (53.8 vs 52.5) scores were similar between the groups, respectively. Kaplan-Meier survivorship analyses revealed an estimated mean survival of 100% at six years in FG group and 90% at 14 years in CG group. Conclusion In the reconstruction of periprosthetic bone defects after femoral revision or PPF, onlay cortical fibula autografts provide comparable clinical and radiological outcomes to allografts. Its incorporation is faster, it is cost-effective and easy to obtain without apparent morbidity.
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    PublicationOpen Access
    A Novel External Fixator Designed for a More Comfortable and Secure Hip Arthroscopy
    (2022-01-01T00:00:00Z) Pulatkan, Anil; UÇAN, VAHDET; YILDIZ, FATİH; TUNCAY, İBRAHİM; UÇAN, VAHDET; YILDIZ, FATİH; TUNCAY, İBRAHİM
    Objective: To evaluate the functional results of a novel external fixator (EF) designed for joint distraction and prevention of traction table-related hip arthroscopy complications Methods: After obtaining promising results in a cadaveric study, 21 hips of 20 patients underwent EF-assisted arthroscopic hip surgeries for femoroacetabular impingement (FAI) and/or labral tear treatments. Patients were operated on a standard operating table in the supine position. A novel EF was used to distract the joint for central hip arthroscopy. The time needed for EF application and joint distraction and the amount of joint distraction were recorded. Preoperative functional scores were retrospectively compared to the postoperative 5-year follow-up results using the Harris Hip and Western Ontario and McMaster Universities Index scores. Results: All patients underwent peripheral and central arthroscopy. The mean time for EF application and joint distraction was 19 min (range: 8-21). The mean amount of joint distraction was 13.2 mm (range: 12-18). None of the arthroscopic procedures had to be converted to open surgery. Functional results of all patients were improved at the 5-year follow-up (p<0.01). Only one patient required hip arthroscopy revision due to residual FAI. No other major or minor complication was found that is related to the EF or arthroscopy itself. Conclusion: Mid-term outcomes following EF-assisted hip arthroscopy demonstrate significant improvement in the functional outcomes without traction table-related complications. EF can be used as an alternative to traction table to maintain adequate hip distraction in arthroscopic hip surgery. In addition to the rotation, a novel designed EF allows hip joint flexion during distraction contrary to traction table.
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    PublicationOpen Access
    Comparison of Intravenous, Intra-articular, and Combined Tranexamic Acid Use in Primary Total Knee Arthroplasty without a Tourniquet and a Drain
    (2020-04-01T00:00:00Z) Binlaksar, Ruwais; Ali, Jotyar; UZER, GÖKÇER; YILDIZ, FATİH; UÇAN, VAHDET; TUNCAY, İBRAHİM
    Objective: We assessed the effect of tranexamic acid (TXA) route of administration on the estimated blood loss (EBL) in patients undergoing primary total knee arthroplasty (TKA) without tourniquet and drain use. Methods: One hundred fifty three patients who underwent primary TKA with use of TXA, between December 2012 and February 2016 were evaluated retrospectively. The patients were divided into three groups according to the route of TXA use: group I, 2 g of intravenous (IV; n=50); group II, 2 g of intraarticular (IA, n=50); and group III, 1 g of IV and 1 g IA combined use (n=53). We recorded the body mass indexes, the platelet counts, haemoglobin, haematocrit levels, prothrombin time, partial thromboplastin time, and international normalised ratio, preoperatively and at 1st and 7th days, postoperatively. EBL was calculated using Meunier's formula. Results: On the first day, the mean EBLs for groups I to III were 286.3 +/- 128.8 mL, 342.7 +/- 176.0 mL, and 379.7 +/- 228.9 mL, respectively (p=0.029 for group I vs. group III). On 7th day postoperatively, they were calculated as 823 +/- 619.3 mL, 1175.1 +/- 970.5 mL, and 1092.2 +/- 766.7 mL (p=0.073) During the first 90 days postoperatively, we did not see any symptomatic thromboembolic complications, delayed haemorrhage, or surgical site or periprosthetic infections. Conclusion: IV, IA or combined uses of TXA are effective and safe for reducing blood loss and transfusion requirements in primary TKA without a tourniquet and drain.
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    PublicationOpen Access
    Three dimensional patient-specific guides for guide pin positioning in reverse shoulder arthroplasty: An experimental study on different glenoid types
    (2022-01-01T00:00:00Z) Sadeghi, Majid Mohammad; KEÇECİ, EMİN FARUK; KAPICIOĞLU, Mehmet; Aralasmak, Ayse; Tezgel, Okan; BAŞARAN, MURAT ALPER; YILDIZ, FATİH; Bilsel, Kerem; KAPICIOĞLU, MEHMET; ARALAŞMAK, AYŞE; YILDIZ, FATİH; BİLSEL, İSMAIL KEREM
    Introduction Incorrect positioning is one of the main factors for glenoid component loosening in reverse shoulder arthroplasty and component placement can be challenging. This study aimed to assess whether Patient-Specific Instrumentation (PSI) provides better guide pin positioning accuracy and is superior to standard guided and freehand instrumentation methods in cases of glenoid bone deformity. Materials and Methods Based on the Walch classification, five different scapula types were acquired by computed tomography (CT). For each type, two different surgeons placed a guide pin into the scapula using three different methods: freehand method, conventional non-patient-specific guide, and PSI guide. Each method was repeated five times by both surgeons. In these experiments, a total of 150 samples of scapula models were used (5 x 2 x 3 x 5 = 150). Post-operative CT scans of the samples with the guide pin were digitally assessed and the accuracy of the pin placement was determined by comparison to the preoperative planning on a three-dimensional (3D) model. Results The PSI method showed accuracies to the preoperative plan of 2.68 (SD 2.10) degrees for version angle (p < .05), 2.59 (SD 2.68) degrees for inclination angle (p < .05), and 1.55 (SD 1.26) mm for entry point offset (p < .05). The mean and standard deviation errors compared to planned values of version angle, inclination angle, and entry point offset were statistically significant for the PSI method for the type C defected glenoid and non-arthritic glenoid. Conclusion Using the PSI guide created by an image processing software tool for guide pin positioning showed advantages in glenoid component positioning over other methods, for defected and intact glenoid types, but correlation with clinical outcomes should be examined.