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Dive into the research topics where Gurkan Gumussuyu is active.

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Featured researches published by Gurkan Gumussuyu.


Journal of Shoulder and Elbow Surgery | 2013

Distal humeral coronal plane fractures: management, complications and outcome

Mehmet Oguz Durakbasa; Gurkan Gumussuyu; Mutlu Gungor; Mehmet Nurullah Ermis

BACKGROUND Coronal plane fractures of the distal humerus have special characteristics in classification, imaging, surgical approaches, materials used, treatment modalities, and complications. The purpose of this study is to comment on these topics. MATERIALS AND METHODS A retrospective analysis was done for patients with distal humeral coronal plane fractures. They were classified according to Dubberley and functionally evaluated by Mayo Elbow Performance Index (MEPI). The long-term complications were evaluated. RESULTS There were 15 patients, with type 1 fractures in 2, type 2 in 6, and type 3 in 7. All patients were treated by open reduction and internal fixation either by lateral or posterior approach. The average MEPI score was 83.3 (range, 60-100) points with 7 excellent, 2 good, and 6 fair results. The MEPI scores of type 3 fractures were significantly lower than those of types 1 and 2 fractures (P = .037 and P = .002, respectively). The complications were avascular necrosis in 4 (27%) patients, degenerative arthritis in 6 (40%), joint step-off in 6 (40%), heterotopic ossification in 7 (47%), nonunion in 1 (7%), and implant failure in 1 (7%). The presence of avascular necrosis and joint step-off were significantly associated with degenerative arthritis (P = .004 and P = .005, respectively). Heterotopic ossification was significantly associated with presence of lateral epicondyle fracture (P = .004). CONCLUSION Type 1A and 2A coronal plane fractures typically had an excellent outcome. However, type 3 and subtype B fractures are prone to developing complications which are primarily avascular necrosis, degenerative arthritis and heterotopic ossification.


Arthritis | 2013

Retrospective Cohort Study of the Prevalence of Lumbosacral Transitional Vertebra in a Wide and Well-Represented Population

Demet Uçar; Bekir Yavuz Uçar; Yahya Coşar; Kurtuluş Emrem; Gurkan Gumussuyu; Serhat Mutlu; Burcu Mutlu; Mehmet Akif Çaçan; Yılmaz Mertsoy; Hatice Gümüş

Purpose. The aim of this study is to determine the prevalence of lumbosacral transitional vertebra (LSTV) in a well-represented general population. Methods. For a retrospective cohort study, abdominal radiographs of adult subjects were queried with clear visibility of the vertebral body articulation of the last rib, all lumbar transverse processes, and complete sacral wings. Exclusion criteria included any radiologic evidence of previous lumbosacral surgery that would block our view. A total of 6200 abdominal films were reviewed, and 3607 were identified as being suitable for the measurement of the desired parameters. Results. A total of 3607 subjects were identified as eligible for the study, and 683 (18.9%) were classified as positive for a lumbosacral transitional vertebra. The prevalence of sacralization and lumbarization was found as 17.2% and 1.7%, respectively. The average age at the time of the study was 39.5 ± 15.2 years (18–86 years). Conclusions. As a result of different opinions, LSTV retains its controversial status. Our prevalence study of the general population will provide assistance for resolution of the controversy. Prevalence studies of the general population with a wide participation will shed light on comparative studies.


International Journal of Surgery | 2018

Sagittal orientation and uniform entry for thoracic pedicle screw placement with free-hand technique: A retrospective study on 382 pedicle screws

H. Bahadir Gokcen; Sinan Erdogan; Sidar Ozturk; Gurkan Gumussuyu; Irem Bayram; Cagatay Ozturk

BACKGROUND One of the most important factors in obtaining a successful outcome in spinal surgery is appropriate placement of the pedicle screw. A number of different techniques are used to achieve successful pedicle screw placement. The free-hand technique has the advantage of no requirement for radiation exposure, but its success is highly dependent on surgeon experience. Here, we describe our entry point and perioperative sagittal orientation method, and evaluate postoperative sagittal alignment of pedicle screws with the free-hand pedicle screw placement technique. MATERIALS AND METHODS Eighty-two patients undergoing spinal surgery between 2015 and 2016 were included in this study. Pedicle screw placement was evaluated retrospectively on postoperative anterior-posterior (A-P) and lateral load-bearing radiographs of the entire spinal column. The vertebral body was divided into five areas in the lateral plane. Sagittal orientation of the pedicle screws on lateral radiographs was evaluated by two spine surgeons with 3 years of experience and one radiologist experienced in musculoskeletal radiology, with each observer evaluating the image twice according to a 1-month interval. RESULTS A total of 382 pedicle screws were evaluated. There was no statistically significant difference between the first and second measurements, performed by individual observers, and there was good concordance among the three observers. CONCLUSIONS Use of a uniform entry point at all levels may increase the effectiveness of the free-hand technique and decrease the pedicle screw misplacement rate. Our technique may standardize the free-hand technique, which does not require radiation exposure, and make it more practical to apply uniformly.


Biomedical Research-tokyo | 2018

Occupational injury study in jockeys in Turkey: Relationship between experience, type of injury and localization

Bahadir Gokcen H; Gurkan Gumussuyu; Sidar Ozturk; Bahattin Kemah; Engin Çarkçi; Olcay Guler; Osman Rodop

Equestrian sports are known as potentially dangerous sports that are vulnerable to damage to the spine and extremities. The aim of this study is to characterize the type and localization of injuries and evaluate their relationship with occupational experience. In-between 2015-2017, records of orthopedic injuries during horse riding in jockeys were retrospectively evaluated. Patients were divided into 2 subgroups according to their professional experience. Winners up to 100 races were classified as amateur (apranti jockey), more than 100 race winners were classified as experienced (jockey). Localizations of injury types were divided into bones and soft tissue, and their relationship between age and experience were statistically evaluated. Eighty-five patients were included in this study. The mean age was 24.6 (17-32). Thirty-nine patients were classified as amateur and 46 patients were classified as experienced. Thirtytwo of 85 patients were treated conservatively. Of the eighty-five patients, 53 were treated with surgical methods. There is no statistically significant difference between experience, type and localization of injuries (p>0.05). The results of this study makes us think that horse sports are open to serious injuries that require surgical treatment and always requires high levels of attention independent from experience.


Dicle Tıp Dergisi | 2015

The effect of fracture type and angular deterioration on the functional outcome of calcaneal fractures

Atilla Polat; Abdullah Demirtaş; Ibrahim Azboy; Bekir Yavuz Uçar; Yahya Coşar; Gurkan Gumussuyu; İdris Ahmet Çakır

Objectives: To compare endothelial changes after penetrating keratoplasty (PK) and deep anterior lamellar keratoplasty (DALK) in clear corneal graft. Methods: In this study, fifty six eyes undergone DALK (DALK Group) and eighty two eyes undergone PK (PK Group) due to various reasons are included. After operation at 1st, 12th, 24th and 36th month central corneal endothelial cell density (CD) and variability coefficient(CV) value examined by specular microscopy of clear graft which have not had additional surgery, greft rejection or glaucoma during follow up period were compared. Results: Endothelial cell density in DALK group were 2426p587 cell/mms 2289p579 cell/mms, 2222p541 cell/mms, 2175p521 cell/mms, in PK group were 2595p589 cell/mms, 2064p583 cell/mms, 1759p510 cell/mms 1509p494 cell/mms at 1st, 12th, 24th and 36th month respectively. Decrease in CD values were 5.9% at 12th month, 7.5% at 24th month and 9.4% at 36th month comparing with first month in DALK group. Decrease in CD values were 18.4% at 12th month, 30.2% at 24th month and 40.3% at 36th month comparing with first month in PK group. Variability coefficient (CV) values in group DALK were 23.3p6.2, 24.2p6.4, 24.2p6.1 and 24.5p5.6 at 1st,12th, 24th and 36th month respectively. Variability coefficient (CV) values in group PK were 19.6p3.4, 23.2p5.4, 25.9p6.2 and 27.5p5.7 at 1st,12th, 24th, and 36th months respectively. Conclusion: More polymegatism and more decrease in endothelial cell density with time were assessed in grafts undergone PK compared with grafts undergone DALK.Objectives: The aim of this study was to determine the effect of fracture type and angular deterioration on the outcome of calcaneal fractures. Materials and methods: Thirty-two patients (23 males, 9 females; mean age 45 years) with calcaneus fractures retrospectively reviewed. Twenty-four fractures were closed, and eight fractures were open. Bohler and Gissane angles were measured using patient’s before, and after reduction X-ray films. According to the EssexLopresti classification there were three type I, 14 type II, and 15 type III fractures. Five patients were treated with casting (Group I), 19 patients with closed reduction K-wire application (Group II), and 8 patients with plate fixation. Final clinical outcome were assessed by Maryland Foot Score. Mean follow-up period was 109 weeks.Amac: Bu calismada kalsipotriol-betametazon dipropionat ile tedavi edilen plak psoriazisli olgularda doku duzeyinde hucresel immunitenin ve serumda sitokin duzeylerinin rolunun arastirilmasi amaclandi. Gerec ve yontem: Calismaya plak tip psoriazisli 20 olgu alindi. Hastalarin tedavi oncesi ve sonrasi psoriatik lezyonlari ile saglam deriden biyopsi ve periferik kan ornekleri alindi. Bulgular: Immunohistokimyasal incelemede, CD4+, CD8+ ve CD25+ T lenfositler, tedavi oncesi lezyonlu dokuda saglam doku ve tedavi sonrasi doku ile kiyaslandiginda anlamli bir sekilde yuksekti (sirasiyla, p0.05). Sonuc: Calismamizda lezyonlu deride CD4+ ve CD8+ hucre birikimi oldugunu ve CD4+ T lenfositlerin daha hâkim hucre grubu oldugu gosterildi. Uygulanan topikal tedavinin etkinligine paralel olarak lezyonlarda duzelme olmasi ve lezyonlu bolgelerde CD4+ ve CD8+ T hucrelerinde anlamli bir azalma meydana gelmesi, Th lenfositlerin hastaligin immunopatogenezinde onemli rolunun oldugu tezini desteklemektedir. Ancak, sonuclarimiz, hastaligin kronik ozelligi ile uyumlu olarak T hucrelerin dokuda yine de yeterince kaldigini ve topikal tedavinin hastaligin aktivasyonunu engelleyemedigini gostermektedir.


Dicle Tıp Dergisi | 2011

Kalkaneus kırıklarında kırık tipi ve açısal bozulmanın fonksiyonel sonuçlar üzerine etkisi

Atilla Polat; Abdullah Demirtaş; Ibrahim Azboy; Bekir Yavuz Uçar; Yahya Coşar; Gurkan Gumussuyu; İdris Ahmet Çakır

Objectives: To compare endothelial changes after penetrating keratoplasty (PK) and deep anterior lamellar keratoplasty (DALK) in clear corneal graft. Methods: In this study, fifty six eyes undergone DALK (DALK Group) and eighty two eyes undergone PK (PK Group) due to various reasons are included. After operation at 1st, 12th, 24th and 36th month central corneal endothelial cell density (CD) and variability coefficient(CV) value examined by specular microscopy of clear graft which have not had additional surgery, greft rejection or glaucoma during follow up period were compared. Results: Endothelial cell density in DALK group were 2426p587 cell/mms 2289p579 cell/mms, 2222p541 cell/mms, 2175p521 cell/mms, in PK group were 2595p589 cell/mms, 2064p583 cell/mms, 1759p510 cell/mms 1509p494 cell/mms at 1st, 12th, 24th and 36th month respectively. Decrease in CD values were 5.9% at 12th month, 7.5% at 24th month and 9.4% at 36th month comparing with first month in DALK group. Decrease in CD values were 18.4% at 12th month, 30.2% at 24th month and 40.3% at 36th month comparing with first month in PK group. Variability coefficient (CV) values in group DALK were 23.3p6.2, 24.2p6.4, 24.2p6.1 and 24.5p5.6 at 1st,12th, 24th and 36th month respectively. Variability coefficient (CV) values in group PK were 19.6p3.4, 23.2p5.4, 25.9p6.2 and 27.5p5.7 at 1st,12th, 24th, and 36th months respectively. Conclusion: More polymegatism and more decrease in endothelial cell density with time were assessed in grafts undergone PK compared with grafts undergone DALK.Objectives: The aim of this study was to determine the effect of fracture type and angular deterioration on the outcome of calcaneal fractures. Materials and methods: Thirty-two patients (23 males, 9 females; mean age 45 years) with calcaneus fractures retrospectively reviewed. Twenty-four fractures were closed, and eight fractures were open. Bohler and Gissane angles were measured using patient’s before, and after reduction X-ray films. According to the EssexLopresti classification there were three type I, 14 type II, and 15 type III fractures. Five patients were treated with casting (Group I), 19 patients with closed reduction K-wire application (Group II), and 8 patients with plate fixation. Final clinical outcome were assessed by Maryland Foot Score. Mean follow-up period was 109 weeks.Amac: Bu calismada kalsipotriol-betametazon dipropionat ile tedavi edilen plak psoriazisli olgularda doku duzeyinde hucresel immunitenin ve serumda sitokin duzeylerinin rolunun arastirilmasi amaclandi. Gerec ve yontem: Calismaya plak tip psoriazisli 20 olgu alindi. Hastalarin tedavi oncesi ve sonrasi psoriatik lezyonlari ile saglam deriden biyopsi ve periferik kan ornekleri alindi. Bulgular: Immunohistokimyasal incelemede, CD4+, CD8+ ve CD25+ T lenfositler, tedavi oncesi lezyonlu dokuda saglam doku ve tedavi sonrasi doku ile kiyaslandiginda anlamli bir sekilde yuksekti (sirasiyla, p0.05). Sonuc: Calismamizda lezyonlu deride CD4+ ve CD8+ hucre birikimi oldugunu ve CD4+ T lenfositlerin daha hâkim hucre grubu oldugu gosterildi. Uygulanan topikal tedavinin etkinligine paralel olarak lezyonlarda duzelme olmasi ve lezyonlu bolgelerde CD4+ ve CD8+ T hucrelerinde anlamli bir azalma meydana gelmesi, Th lenfositlerin hastaligin immunopatogenezinde onemli rolunun oldugu tezini desteklemektedir. Ancak, sonuclarimiz, hastaligin kronik ozelligi ile uyumlu olarak T hucrelerin dokuda yine de yeterince kaldigini ve topikal tedavinin hastaligin aktivasyonunu engelleyemedigini gostermektedir.


Childs Nervous System | 2018

Surgical treatment of patients with myelomeningocele-related spine deformities: study of 26 cases

Huseyin Canaz; Ibrahim Alatas; Gokhan Canaz; Gurkan Gumussuyu; Mehmet Akif Çaçan; Ayten Saraçoğlu; Bekir Yavuz Uçar


The Spine Journal | 2016

Assessment of the Disc and Facet Degeneration in the Unfused Lumbar Spine after Stopping Fusion at L3 in AIS: an MRI Study. How Much Disc Wedging and Residual Curve Can be Accepted?

Sinan Kahraman; Selhan Karadereler; Ozcan Kaya; Gurkan Gumussuyu; Bulent Guneri; Levent Ulusoy; Ayhan Mutlu; Gokhan Peker; Tunay Sanli; Bekir Yavuz Ucar; Meric Enercan; Azmi Hamzaoglu


The Spine Journal | 2016

Selective Posterior Lumbar Fusion (Cobb to Cobb) in Lenke Type 5 Adolescent Idiopathic Scoliosis: Radiographic and Clinical Results

Bulent Guneri; Tunay Sanli; Sinan Kahraman; Ozcan Kaya; Emel Kaya; Selhan Karadereler; Gurkan Gumussuyu; Gokhan Peker; Bekir Yavuz Ucar; Meric Enercan; Azmi Hamzaoglu


The Spine Journal | 2013

Prophylactic Vertebroplasty of Adjacent Nonfused Segment(s): Its Effect on Adjacent Discs and the Influence of Sagittal Malalignment on its Efficacy: An MRI Study

Sinan Kahraman; Meric Enercan; Gurkan Gumussuyu; Cagatay Ozturk; Tunay Sanli; Fethi Ceylan; Levent Ulusoy; Azmi Hamzaoglu; Ahmet Alanay

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Azmi Hamzaoglu

Istanbul Bilim University

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Meric Enercan

Istanbul Bilim University

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Sinan Kahraman

Istanbul Bilim University

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