Bilgehan Tosun

Kocaeli University, Cocaeli, Kocaeli, Turkey

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Publications (29)35.97 Total impact

  • Bilgehan Tosun · Cengiz Erdemir · Omer Yonga · Ozgür Selek
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    ABSTRACT: Purpose There has been no uniform and extensive description of the use of expandable cages in the setting of thoracolumbar tuberculosis. The purpose of the study was to evaluate the results of the expandable cages and compare with autogenous strut grafting in thoracolumbar tuberculosis. Methods From January 2003 to January 2014, a total of 28 patients with thoracolumbar tuberculosis were treated surgically in our medical center. Patients were divided into three groups. 17 patients received anterior-only surgery; consisting of autogenous iliac bone grafting only in 9 (Group 1), grafting with anterior screw-rod system instrumentation after debridement in 8 patients (Group 2). 11 patients underwent anterior surgery including debridement and distraction of the kyphosis by cages after corpectomy following posterior instrumentation (Group 3).The changes in degree of kyphotic deformity, loss of correction, intervertebral height and loss of intervertebral height were evaluated preoperatively, postoperatively and at the final follow-up. Results Patients were followed 52 ± 10.7 months (range, 18–120 months). Mean age in the Group 1 was 42 (18–69) years, 62 (19–86) years in the Group 2 and 51 (19–71) years in the Group 3. There was no statistically significant difference (P > 0.05) in the focal kyphosis preoperatively, postoperatively and at the last follow-up between three groups. There were statistically significant differences (P
    European Spine Journal 09/2014; 23(11). DOI:10.1007/s00586-014-3565-7 · 2.07 Impact Factor
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    ABSTRACT: This was a retrospective study of patients who had developed a dural tear after thoracic and lumbar spine surgery that was not recognized during the surgery, and was treated either by lumbar drainage or over-sewing of the wounds. To revisit the treatment strategies in postoperative dural leaks and present our experience with over-sewing of the wound and lumbar drainage. Unintended durotomy is a frequent complication of spinal surgery. Management of subsequent cerebrospinal fluid leakage remains controversial. There is no distinct treatment guideline according to the etiology in the current literature. The records of 368 consecutive patients who underwent thoracic and/or lumbar spine surgery from 2006 throug h 2010 were retrospectively reviewed. Seven cerebrospinal fluid fistulas and five pseudomeningoceles were noted in 12 (3.2%) procedures. Cerebrospinal fluid diversion by lumbar drainage in five pseudomeningoceles and over-sewing of wounds in seven cerebrospinal fluid fistulas employed in 12 patients. Clinical grading was evaluated by Wang. Of the 12 patients who had a dural tear, 5 were managed successfully with lumbar drainage, and 7 with oversewing of the wound. The clinical outcomes were excellent in 9 patients, good in 2, and poor in 1. Complications such as neurological deficits, or superficial or deep wound infections did not develop. A recurrence of the fistula or pseudomeningocele after the treatment was not seen in any of our patients. Pseudomeningoceles respond well to lumbar drainage, whereas over-sewing of the wound is an alternative treatment option in cerebrospinal fluid fistulas without neurological compromise.
    Asian spine journal 09/2012; 6(3):157-62. DOI:10.4184/asj.2012.6.3.157
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    ABSTRACT: We compared the outcomes of intramedullary nailing with plate-screw fixation in the treatment for ipsilateral fracture of the hip and femoral shaft. A retrospective study. Level 1 Trauma. Forty-one patients (32 males and 9 females; mean age, 34 years; age range, 21-53) with ipsilateral hip and femoral shaft fractures were treated between 1995 and 2005. Eighteen patients were injured in motor vehicle accidents, and 23 fell from a height. All patients were treated by one of the two methods of internal fixation: a screw-plate fixation (n = 24, Group I) or intramedullary nailing (n = 17, Group II). The fracture union time, nonunion, delayed union, implant failure, need of further surgeries, and functional outcomes were investigated and compared. Fisher's exact test showed that Group I had a significantly higher frequency of nonunion than that of Group II (P = 0.029). Although Group I had more nonunions, delayed unions, and revision operations than Group II, the total union time was similar for both groups. Intramedullary nailing was found to be superior to screw-plate fixation due to improved functional bearing, increased rate of union, stability, and mechanical solidity. The reconstruction nail method is an acceptable alternative treatment for ipsilateral hip and femoral shaft fractures.
    MUSCULOSKELETAL SURGERY 06/2012; 96(2):117-24. DOI:10.1007/s12306-012-0206-3
  • Bilgehan Tosun · Levent Buluc · Umit Gok · Cigdem Unal
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    ABSTRACT: Foot ulcerations resulting in amputation are one of the most devastating consequences of diabetes mellitus and peripheral arterial disease. In foot amputations, Boyd amputation has been even less accepted than Syme amputation due to its dependence on calcaneotibial osseous union in adults. Fifteen Boyd amputations were performed for 14 adults. The indications for amputation were diabetic ulceration of the foot in eight patients, ischemic disease of the lower extremity in four and salvage of the deformed foot due to peripheral neuropathy in one patient. One patient with scleroderma had bilateral amputations due to digital ischemic necrosis. Complete wound healing was documented in seven feet of six patients. Further revisions to a more proximal amputation level were required in seven patients. Despite the high failure rate, we believe Boyd amputation is still a good option in some patients to try to preserve length.
    Foot & Ankle International 11/2011; 32(11):1063-8. DOI:10.3113/FAI.2011.1063 · 1.51 Impact Factor
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    ABSTRACT: Retrospective study. Investigate the radiographic features of the subtypes of Lenke 1A curves to help to determine the optimum distal fusion level selection. The Lenke 1A was the most frequently evaluated curve type in adolescent idiopathic curves. Miyanji et al suggested that the lumbar modifier type A does not accurately define the behavior of the compensatory lumbar curve in Lenke 1A. The tilt of L3 and L4 in the coronal plane may have a significant role in determining distal fusion level. Thirty-six patients with Lenke type 1A idiopathic scoliosis treated by segmental posterior instrumentation with an average of 52.1-month follow-up were retrospectively analyzed. Four different curve types depending on L3-L4 vertebral tilt were described. The radiographic measurements including proximal and distal junctional kyphosis was obtained at latest follow-up. RESULTS.: Preoperative mean major curve Cobb angle of 47.6° was corrected to 12.9° showing a correction rate of 72.8% and maintained at 14.2°. Loss of correction at final follow-up was 2.7%. The mean compensatory curve Cobb angle of 24.4° was corrected to 8.2°. All patients balanced after surgery although seven had more than -5° clavicle angle before surgery. The mean preoperative and postoperative sagittal T5-T12 angles were 30.6° and 26.2°, respectively, and 29.1° at latest follow-up. The mean preoperative, postoperative, and latest follow-up T10-L2 sagittal Cobb angles were -0.2°, 2.0°, and 4.2°. Three patients diagnosed as distal junctional kyphosis at latest follow-up. Distal fusion level should be extended to at least lower end vertebra (LEV) -1 in type 1A-A and type 1A-D curves, while it might be necessary to go down to LEV in the type 1A-B and 1A-C. It seems that LEV might be a reliable guide to select ideal distal fusion level in Lenke type 1A curves.
    Spine 09/2011; 36(19):1592-9. DOI:10.1097/BRS.0b013e3181f54f7f · 2.30 Impact Factor
  • Bilgehan Tosun · Cumhur Cevdet Kesemenli
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    ABSTRACT: Two cases of acute isolated avulsion fracture of the lesser tuberosity of the humerus and their short-term outcome are presented with a review of previously reported cases. Open reduction and internal fixation was performed. Outcomes were excellent, and the patients regained their normal pain-free shoulder function 3 months after the operation. This was a Level IV study.
    International Journal of Shoulder Surgery 04/2011; 5(2):50-3. DOI:10.4103/0973-6042.83198 · 0.65 Impact Factor
  • Bilgehan Tosun · Firat Al · Alptekin Tosun
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    ABSTRACT: Spontaneous osteonecrosis of the navicular in the adult is known as Mueller-Weiss syndrome, which is a rare disease characterized by a collapse of the lateral portion of the tarsal navicular combined with a medial protrusion of the talar head and peri-navicular osteoarthritis. In this article, we describe a case of spontaneous osteonecrosis of tarsal navicular in a 43-year-old male. Chronic midfoot pain over the dorsomedial aspect of the right foot was resolved after complete removal of the necrotic bone from the tarsal navicular, followed by an autologous bone grafting of the resultant defect.
    The Journal of foot and ankle surgery: official publication of the American College of Foot and Ankle Surgeons 03/2011; 50(2):221-4. DOI:10.1053/j.jfas.2010.10.019 · 0.85 Impact Factor
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    ABSTRACT: Retrospective study. To evaluate the radiologic results of fusion with segmental pedicle screw fixation in neglected thoracic congenital curves with a mean follow-up of 51.3 months (range: 24 to 108 mo). Segmental pedicle screw fixation has been shown to be effective both in correcting and controlling the idiopathic spinal deformities. However, the choice of treatment modality is more controversial in neglected thoracic congenital curves of the aged. Fourteen patients with thoracic congenital curves treated by segmental pedicle screw fixation and fusion were analyzed. The average age of the patients was 14.9 years (range: 10 to 25 y) at surgery. Deformity correction was achieved by compression of the convex deformity side with resection of apical 3 ribs. Radiologic analyses of coronal and sagittal plane included Cobb angles of the major compensatory curves, apical vertebrae translation, and sagittal Cobb angles, respectively. In the coronal plane, the preoperative mean major curve Cobb angle of 52.3 degree (range: 32.6 to 66.7 degrees) was corrected to 25.3 degree (range: 7.2 to 44.8 degree) and the mean compensatory curve Cobb angle of 23.6 degree (range: 10.3 to 34.8 degrees) was corrected to 15.9 degree (range: 5.7 to 30.6 degrees). The mean translation of apical vertebrae was 28.8 mm (range: 4.7 to 53.6 mm) before surgery and 15.5 mm (range: 2.4 to 41.3 mm) after surgery. In the sagittal plane, the mean preoperative and postoperative sagittal T5 to T12 angles were 34.8 degree (range: 16.5 to 44.7 degrees) and 27.3 degree (range: 10.4 to 43.5 degrees), respectively. The mean preoperative and postoperative sagittal T12 to S1 angles were 47.2 degree (range: 23.4 to 65.1 degrees) and 41.3 degree (range: 23.8 to 62.7 degrees), respectively. In the neglected thoracic congenital deformities of the aged, with posterior pedicle instrumented fusion, an acceptable correction can be achieved with relatively low morbidity.
    Journal of spinal disorders & techniques 10/2010; 23(8):525-9. DOI:10.1097/BSD.0b013e3181c2f51b · 2.20 Impact Factor
  • Bilgehan Tosun · Halil Atmaca · Umit Gok
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    ABSTRACT: Fifteen hips in 13 patients with hip fracture were treated in patients receiving hemodialysis for chronic renal failure. There were four intertrochanteric and 11 femoral neck fractures. 10 of the 11 femoral neck fractures and one of the four intertrochanteric fractures were treated with cemented bipolar hemiarthroplasty. Two intertrochanteric fractures fixed with sliding compression screws. External fixation was used for stabilization in two patients who had femoral neck and intertrochanteric fractures. Two intertrochanteric fractures that were treated with sliding hip screw showed radiological union postoperatively at the 6th month. Of the 11 hemiarthroplasty, four hips developed aseptic loosening (36%). According to Harris hip score grading system, three (37.5%) poor, two (25%) fair, two (25%) good and one (12.5%) case had excellent outcome in the hemiarthroplasty group. The survival of dialysis patients with a hip fracture is markedly reduced. Initial treatment of hemiarthroplasty allows early mobilization and prevents revision surgery.
    MUSCULOSKELETAL SURGERY 09/2010; 94(2):71-5. DOI:10.1007/s12306-010-0080-9
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    ABSTRACT: Pedicle screw fixation is a challenging procedure in thoracic spine, as inadvertently misplaced screws have high risk of complications. The accuracy of pedicle screws is typically defined as the screws axis being fully contained within the cortices of the pedicle. One hundred and eighty-five thoracic pedicle screws in 19 patients that were drawn from a total of 1.797 screws in 148 scoliosis patients being suspicious of medial and lateral malpositioning were investigated, retrospectively. Screw containment and the rate of misplacement were determined by postoperative axial CT sections. Medial screw malposition was measured between medial pedicle wall and medial margin of the pedicle screw. The distance between lateral margin of the pedicle screw and lateral vertebral corpus was measured in lateral malpositions. A screw that violated medially greater than 2 mm, while lateral violation greater than 6 mm was rated as an "unacceptable screw". The malpositions were medial in 20 (10.8%) and lateral in 34 (18.3%) screws. Medially, nine screws were rated as acceptable. Of the 29 acceptable lateral misplacement, 13 showed significant risk; five to aorta, six to pleura, one to azygos vein and one to trachea. The acceptability of medial pedicle breach may change in each level with different canal width and a different amount of cord shift. In lateral acceptable malpositions, the aorta is always at a risk by concave-sided screws. This CT-based study demonstrated that T4-T9 concave segments have a smaller safe zone with respect to both cord-aorta injury in medial and lateral malpositions. In these segments, screws should be accurate and screw malposition is to be unacceptable.
    European Spine Journal 07/2009; 18(12):1892-7. DOI:10.1007/s00586-009-1065-y · 2.07 Impact Factor
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    ABSTRACT: Tilt fracture is the most unusual variant of pelvic lateral compression injury. The major problem was reported to be protrusion of the pubic ramus into the perineum by posterior-inferior displacement of the fragment. Tilt fragment with anterior and inferior displacement has not been reported in English speaking literature to our knowledge. Anterior tilt fragment can cause significant morbidity in terms of vascular injury, pelvic stability and acetabular fracture.
    Injury 06/2009; 40(10):1036-9. DOI:10.1016/j.injury.2008.11.019 · 2.14 Impact Factor
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    ABSTRACT: Retrospective study. To evaluate the radiological results of fusion with segmental pedicle screw fixation in juvenile idiopathic scoliosis with a minimum 5-year follow-up. Progression of spinal deformity after posterior instrumentation and fusion in immature patients has been reported by several authors. Segmental pedicle screw fixation has been shown to be effective in controlling both coronal and sagittal plane deformities. However, there is no long term study of fusion with segmental pedicle screw fixation in these group of patients. Seven patients with juvenile idiopathic scoliosis treated by segmental pedicle screw fixation and fusion were analyzed. The average age of the patients was 7.4 years (range 5-9 years) at the time of the operation. All the patients were followed up 5 years or more (range 5-8 years) and were all Risser V at the most recent follow up. Three dimensional reconstruction of the radiographs was obtained and 3DStudio Max software was used for combining, evaluating and modifying the technical data derived from both 2d and 3d scan data. The preoperative thoracic curve of 56 +/- 15 degrees was corrected to 24 +/- 17 degrees (57% correction) at the latest follow-up. The lumbar curve of 43 +/- 14 degrees was corrected to 23 +/- 6 degrees (46% correction) at the latest follow-up. The preoperative thoracic kyphosis of 37 +/- 13 degrees and the lumbar lordosis of 33 +/- 13 degrees were changed to 27 +/- 13 degrees and 42 +/- 21 degrees , respectively at the latest follow-up. None of the patients showed coronal decompensation at the latest follow-up. Four patients had no evidence of crankshaft phenomenon. In two patients slight increase in Cobb angle at the instrumented segments with a significant increase in AVR suggesting crankshaft phenomenon was seen. One patient had a curve increase in both instrumented and non instrumented segments due to incorrect strategy. In juvenile idiopathic curves of Risser 0 patients with open triradiate cartilages, routine combined anterior fusion to prevent crankshaft may not be warranted by posterior segmental pedicle screw instrumentation.
    Scoliosis 02/2009; 4(1):1. DOI:10.1186/1748-7161-4-1 · 1.31 Impact Factor
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    ABSTRACT: To investigate the effects of radiotherapy on distraction osteogenesis performed on the same bone in an area that has not received radiation. Radiotherapy (Co60) was carried out in a region where tumors may develop, and then, on the assumption that the tumoral region had been removed, distraction osteogenesis was carried out, and the effects were investigated. Thirty New Zealand rabbits were randomized into two groups, a study group (15 rabbits) and a control group (15 rabbits). In the study group, Co60 was administered by teletherapy to the distal half of the left tibia. Rabbits in the control group were kept in the same environment for the same period, but were not subjected to radiotherapy. Four weeks after radiotherapy, osteotomy was performed on the proximal part of the left tibia of all subjects, and distraction was carried out until 10mm. After distraction was completed, the outcomes were evaluated radiologically, scintigraphically, and histopathologically, and the results were compared. New bone formation achieved through distraction osteogenesis in the study group animals was inadequate, while new bone tissue achieved in the control group was superior (P < 0.001). Radiotherapy has a negative effect on distraction osteogenesis, even if performed on a different part of the bone.
    Clinical and investigative medicine. Medecine clinique et experimentale 01/2009; 32(5):E376-82. · 1.23 Impact Factor
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    ABSTRACT: The axial pullout strength of pedicle screws that were at different temperatures when inserted was compared in calf vertebrae. To determine if insertional temperature of the screw itself affects pullout strength. Fixation stability of pedicle screws depend on several factors. The development of alternate insertion techniques and screw designs were used to improve the stability. Polymethylmethacrylate and calcium sulfate augmentation have been shown to be viable options for improving fixation; but have the potential disadvantages. Three cadaveric thoracic calf spines were instrumented between T1-T10 bilaterally with one type of pedicle screws stored at different insertional temperatures. The axial pullout tests were performed at cross head speed of 5 mm/min. Pullout loads and displacement were recorded at 1/20 seconds intervals until failure occurred. The highest pullout force was obtained with the screws inserted at 4 degrees C. These screws had a 19% increase in pullout strength compared with the screws inserted at 24 degrees C. The highest force/torque proportion was gained in the same group as 0.30 kn/Nm. The technique showed increased pullout force with the screws inserted at 4 degrees C. Using pedicle screws stored at 4 degrees C before instrumentation, seems reasonable in an attempt to obtain a better bone-screw interface.
    Spine 10/2008; 33(19):E667-72. DOI:10.1097/BRS.0b013e31817c4f9c · 2.30 Impact Factor
  • Bilgehan Tosun · Ozgur Selek · Levent Buluc · Kaya Memisoglu
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    ABSTRACT: We present an unusual case of an isolated interosseous membrane disruption of the forearm without any fracture pattern. Dislocation of both radial head and distal radio-ulnar joint was presented. Open reduction of the radial head with radial neck shortening osteotomy was performed.
    Archives of Orthopaedic and Trauma Surgery 08/2008; 128(7):669-71. DOI:10.1007/s00402-007-0456-y · 1.60 Impact Factor
  • Bilgehan Tosun · Gür Akansel · Ahmet Y Sarlak
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    ABSTRACT: A case of traumatic dislocation of the first metatarsophalangeal joint with concomitant fibular sesamoid fracture and thoracic vertebral fracture is presented. The first metatarsophalangeal joint was repaired by means of open reduction with collateral ligament repair. At 12 months following the operation, the patient displayed nonpainful and unrestricted first metatarsophalangeal joint motion.
    The Journal of foot and ankle surgery: official publication of the American College of Foot and Ankle Surgeons 07/2008; 47(4):357-61. DOI:10.1053/j.jfas.2008.02.022 · 0.85 Impact Factor
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    ABSTRACT: In posterior pedicle screw instrumentation of thoracic idiopathic scoliosis, screw malposition might cause significant morbidity in terms of possible pleural, spinal cord, and aorta injury. Preoperative axial magnetic resonance images (MRI) in 12 consecutive patients with right thoracic adolescent scoliosis, all with King type 3 curves, were analyzed in order to evaluate the relationship between the inserted pedicle screw position to pleura, spinal cord, aorta. Axial vertebral images for each thoracic level were scanned and the simulation of pedicle screw insertion was performed using a digital measurement programme. The angular contact value for each parameter regarding the pleura and spinal cord was measured on both sides of the curve. The aorta-vertebral distance was also measured. Aorta-vertebral distance was found to be decreasing gradually from the cephalad to the caudad with the shortest distance being measured at T12 with a mean of 1.2 mm. Concave-sided screws on T5-T9 and convex-sided screws on T2-T3 had the greatest risk to spinal cord injury. Pleural injury is most likely on T4-T9 segments by the convex side screws. T4-T8 screws on the concave side and T11-T12 screws on the convex side may pose risk to the aorta. This MRI-based study demonstrated that in pedicle instrumentation of thoracic levels, every segment deserves special consideration, where computer scanning might be mandatory in immature spine and in patients with severe deformity.
    European Spine Journal 06/2008; 17(5):657-62. DOI:10.1007/s00586-008-0639-4 · 2.07 Impact Factor
  • Orthopedics 02/2008; 31(1):95. DOI:10.3928/01477447-20080101-06 · 0.96 Impact Factor
  • Ahmet Y. Sarlak · Bilgehan Tosun · Levent Buluc · Anil Cubukcu
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    ABSTRACT: Pedicled omental flaps have been used successfully for soft tissue reconstruction of complicated wounds. Distal reach and the lengthening technique of the pedicled omentum are less highlighted. Unestimated size availability of coverage by the lengthening technique has restricted common practice in clinical use. We have used the cadaveric scale of Das preoperatively to assess the distal reach and coverage on the lengthened pedicled omentum, this can correlate well intraoperatively.
    European Journal of Plastic Surgery 02/2008; 30(5):239-243. DOI:10.1007/s00238-007-0173-3
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    Bilgehan Tosun · Hakan Gundes · Levent Buluc · Ahmet Y Sarlak
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    ABSTRACT: Elbow stiffness is a common disorder, which restricts daily activities. Between 30 degrees and 130 degrees of elbow movement is usually enough to perform most daily activities. However, a 10 degrees to 15 degrees loss of elbow extension may be a problem when the patient is an athlete. From 1996 to 2004, 20 elbows of 20 patients (who were available for follow-up examination) were treated by lateral and medial release at Kocaeli University, for post-traumatic elbow contracture. Preoperative and the postoperative 12-month follow-up measurements were performed. The mean preoperative arc of motion was 35 degrees and this value improved to 86.2 degrees . The maximum improvement at the arc of motion was 105 degrees . In an effort to understand the pathophysiology of the condition, surgical approaches may be used safely. The purpose of this study was to assess the functional outcome of the elbow joint after using a combination of lateral and medial approaches to treat elbow stiffness.
    International Orthopaedics 11/2007; 31(5):635-8. DOI:10.1007/s00264-006-0252-2 · 2.11 Impact Factor

Publication Stats

182 Citations
35.97 Total Impact Points


  • 2007–2014
    • Kocaeli University
      • Department of Orthopedics and Traumatology
      Cocaeli, Kocaeli, Turkey
  • 2005
    • Istanbul Surgery Hospital
      İstanbul, Istanbul, Turkey