Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Mehmet Gem is active.

Publication


Featured researches published by Mehmet Gem.


Revista Da Sociedade Brasileira De Medicina Tropical | 2015

Hydatid cysts in muscles: clinical manifestations, diagnosis, and management of this atypical presentation

Recep Tekin; Alper Avci; Rojbin Ceylan Tekin; Mehmet Gem; Remzi Çevik

INTRODUCTION Hydatid cysts are rarely detected in muscle tissue (0.7-0.9%), even in endemic countries. The aim of this study was to present information regarding the clinical manifestations, diagnosis, and management of muscle echinococcosis. METHODS Twenty-two patients with hydatid cysts in the muscle were followed from January 2006 through December 2014. RESULTS Twenty-four sites of muscle involvement were observed in the 22 patients. Fifteen (68%) of our patients were women, while seven (32%) were men. The mean age was 28.1 ± 15.4 (6-61) years. The most frequent locations were the thigh (27.2%) and the paravertebral region (13.6%). Most patients reported a painless slow-growing mass with normal overlying skin. Most (90.2%) cases were treated by surgical excision and fine-needle aspiration. CONCLUSIONS Primary muscle hydatid cyst should be considered in the differential diagnosis in cystic masses of the muscular system without pain and localized enlargement of soft tissue, especially in endemic areas. Hydatid cyst should be investigated using serological tests and imaging modalities. If possible, total surgical excision of hydatid cyst in the muscle should be performed.


Journal of orthopaedic surgery | 2013

Open reduction and Kirschner wire fixation with triceps lengthening for neglected elbow dislocations

Ahmet Kapukaya; Bekir Yavuz Uçar; Mehmet Gem

Purpose. To evaluate outcome of open reduction and Kirschner wire fixation with triceps lengthening for neglected elbow dislocations. Methods. Records of 6 women and 14 men aged 7 to 60 (mean, 20) years who underwent open reduction and Kirschner wire fixation with triceps lengthening for neglected elbow dislocations were reviewed. The dislocations were posterolateral (n=11), posterior (n=4), and posteromedial (n=5). No patient had a neurologic deficit. Elbow stiffness was the main indication for surgery. The duration of dislocation was 25 to 45 days in 11 patients and >45 days in 9; the mean was 47 days. The Mayo Elbow Performance Index (MEPI) was used to assess outcome at the final follow-up. The maximum score was 100. Scores of 90 to 100 were considered excellent, 75 to 89 good, 60 to 74 fair, and <60 poor. Results. The mean follow-up period was 39.1 months. At the final follow-up, the mean MEPI score was 79.3; outcome was excellent in 6 patients, good in 8, fair in 4, and poor in 2. The mean MEPI was 86.4 and 70.6 for patients with ≤45 and >45 days of dislocation, respectively. The mean range of movement improved from 20° to 84.5° (p<0.001). The 2 groups were significantly different in terms of MEPI (p=0.005) and range of movement (p=0.001). The MEPI correlated negatively with the duration of dislocation (r= −0.562, p=0.01). The range of movement correlated negatively with patient age (r= −0.649, p=0.002). Conclusion. Open reduction and Kirschner wire fixation with triceps lengthening, together with active postoperative elbow movements achieved favourable results for neglected elbow dislocations, especially in younger patients and those in whom the duration of dislocation was <45 days.


Acta Orthopaedica et Traumatologica Turcica | 2013

Demographic and clinical characteristics of traumatic shoulder dislocations in an urban city of Turkey: a retrospective analysis of 208 cases

Mehmet Tas; M. Kerem Canbora; Ozkan Kose; Omer Faruk Egerci; Mehmet Gem

OBJECTIVE The aim of this study was to investigate the demographic and clinical characteristics of traumatic shoulder dislocations in an urban city of Turkey. METHODS The digital patient database was reviewed to identify all patients with glenohumeral dislocation of the shoulder admitted to the emergency departments of the two hospitals in Diyarbakır between January 2008 and December 2010. Incidence, demographics, clinical characteristics, recurrence, associated injuries, and mechanism of injury were evaluated. RESULTS Two hundred and eight patients (163 male, 45 female; mean age: 37.2±21.3) experienced traumatic shoulder dislocation during the study period. The overall incidence of primary shoulder dislocations was 5.3 per 100,000 person-years. Age distribution peaked between 21 and 30 years (96.5% male) and between 61 and 70 years (66.7% female). Primary shoulder dislocation occurred in 172 patients (82.7%) and recurrent dislocations in 36 (17.3%). Patients with recurrent shoulder dislocations were younger than those with primary dislocations (mean age, 29.7±14.5 and 38.8±22.2, respectively; p=0.020). There were 195 (93.4%) anterior dislocations. The mechanism of injury was falls in 155 (74.5%) cases. Reduction was achieved in 165 patients (79.3%) in the emergency department. General anesthesia was used for 43 patients (20.7%). CONCLUSION The 5.3 per 100,000 person-years incidence of traumatic shoulder dislocations in Turkey was much lower than previous studies. Demographic characteristics also showed various differences closely related to the population pyramid.


Acta Orthopaedica et Traumatologica Turcica | 2014

Comparison of retrograde intramedullary nailing and bridge plating in the treatment of extra-articular fractures of the distal femur

Abdullah Demirtaş; Ibrahim Azboy; Emin Özkul; Mehmet Gem; Celil Alemdar

OBJECTIVE The aim of this study was to compare retrograde intramedullary nailing (RIMN) and bridge plating for the treatment of extra-articular distal femur fractures. METHODS The study retrospectively examined 15 patients (13 males and 2 females; mean age: 36 years, range: 17 to 55 years) who underwent bridge plating and 13 patients (11 males and 2 females; mean age: 31.1 years, range: 17 to 49 years) who underwent RIMN for the treatment of extra-articular distal femur fractures between 2007 and 2012. Functional results were evaluated using the Sanders criteria. The mean follow-up time was 31.3 (range: 20 to 46) months and 26.7 (range: 18 to 62) months in the plate and the nail groups, respectively. RESULTS Mean duration until union was 25.7 (range: 12 to 72) weeks in the plate group and 22.3 (range: 12 to 52) weeks in the nail group. Nonunion was observed in 2 patients in the plate group and in 1 in the nail group, delayed union in 3 patients in the plate and 2 in the nail groups, malalignment (>10°) in 2 patients in the plate group and 1 in the nail group and implant failure in 1 patient in the plate group. Excellent/good functional results were obtained in 12 and 10 patients in the plate and the nail groups, respectively. No significant difference was found between the groups in terms of duration of union, complications and functional results (p>0.05). CONCLUSION Bridge plating and RIMN have similar results in the treatment of extra-articular distal femur fractures. Both methods can be applied to all fractures, with the exception of Gustilo-Anderson Type 3B and C open fractures.


Bioelectromagnetics | 2017

Effects of local vibration and pulsed electromagnetic field on bone fracture: A comparative study

Hakkı Murat Bilgin; Ferhat Çelik; Mehmet Gem; Veysi Akpolat; İsmail Yıldız; Aysun Ekinci; Mehmet Sirac Ozerdem; Selcuk Tunik

The effectiveness of various therapeutic methods on bone fracture has been demonstrated in several studies. In the present study, we tried to evaluate the effect of local low-magnitude, high-frequency vibration (LMHFV) on rat tibia fracture in comparison with pulsed electromagnetic fields (PEMF) during the healing process. Mid-diaphysis tibiae fractures were induced in 30 Sprague-Dawley rats. The rats were assigned into groups such as control (CONT), LMHFV (15 min/day, 7 days/week), and PEMF (3.5 h/day, 7 days/week) for a three-week treatment. Nothing was applied to control group. Radiographs, serum osteocalcin levels, and stereological bone analyses of the three groups were compared. The X-rays of tibiae were taken 21 days after the end of the healing process. PEMF and LMHFV groups had more callus formation when compared to CONT group; however, the difference was not statistically significant (P = 0.375). Serum osteocalcin levels were elevated in the experimental groups compared to CONT (P ≤ 0.001). Stereological tests also showed higher osteogenic results in experimental groups, especially in LMHFV group. The results of the present study suggest that application of direct local LMHFV on fracture has promoted bone formation, showing great potential in improving fracture outcome. Bioelectromagnetics. 38:339-348, 2017.


Journal of Pediatric Orthopaedics | 2016

Minimally Invasive Plate Osteosynthesis in Open Pediatric Tibial Fractures.

Emin Özkul; Mehmet Gem; Hüseyin Arslan; Celil Alemdar; Ibrahim Azboy; Seher Gündüz Arslan

Objectives: The aim of this study is to investigate the effectiveness and reliability of limited-contact locking plates in minimally invasive percutaneous osteosynthesis (MIPO) of the lateral tibia. Design: A retrospective study. Patients and Methods: The retrospective study included 14 patients who were operatively treated with an MIPO technique due to open tibial fractures between 2006 and 2012. The patients were 11 males and 3 females with a mean age of 13.2 (range, 9 to 16) years. The patients were followed up for a mean period of 2.4 (range, 1 to 5) years. The mechanism of the injuries included a motor vehicle accident (n=11), a shotgun injury (n=2), and a fall from height (n=1). According to the Gustilo-Anderson classification, 10 patients had type I (72%), 2 had type II (14%), and 2 had type III (14%) open fractures. Results: The mean time to radiologic union was 18 (range, 11 to 32) weeks. No infection was detected that would require implant removal. No complications such as early epiphyseal closure, angulation, or limb-length inequality were observed. Conclusions: Limited-contact locking plates in MIPO of the lateral tibia is an effective alternative method in the treatment of open pediatric tibial fractures. Level of Evidence: Level IV—therapeutic.


Indian Journal of Orthopaedics | 2016

Results of two different surgical techniques in the treatment of advanced-stage Freiberg's disease

Emin Özkul; Mehmet Gem; Celil Alemdar; Hüseyin Arslan; Ferit Boğatekin; Bülent Kişin

Background: Freibergs disease is an osteochondrosis most commonly seen in adolescent women and characterized by pain, swelling and motion restriction in the second metatarsal. The early stages of this disease can be managed with semirigid orthoses, metatarsal bars and short leg walking cast. Number of operative methods are suggested which can be used depending on the pathophysiology of the disease, including abnormal biomechanics, joint congruence and degenerative process. We evaluated the outcomes of the patients with Freibergs disease who were treated with dorsal closing-wedge osteotomy and resection of the metatarsal head. Patients and Methods: 16 patients (11 female, 5 male) with a mean age of 24.5 (range 13–49 years) years who underwent dorsal closing wedge osteotomy or resection of the metatarsal head were included in this retrospective study. Second metatarsal was affected in 13 and third metatarsal in three patients. According to the Smillies classification system, ten patients had type IV osteonecrosis and six patients had type V. The results of the patients were evaluated using the lesser metatarsophalangeal-interphalangeal (LMPI) scale. Results: According to the LMPI scale, the postoperative scores for the osteotomy and excision groups were 86 (range 64–100) and 72.6 (range 60–85), respectively. In the osteotomy group, mean passive flexion restriction was 18° (range 0°–35°) and mean passive extension restriction was 12° (range 0°–25°). Mean metatarsal shortening was 2.2 mm (range 2–4 mm) in the osteotomy group as opposed to 9.8 mm (range 7–14 mm) in the excision group. Significant pain relief was obtained in both groups following the surgery. Conclusions: The decision of performing osteotomy or resection arthroplasty in the patients with advanced-stage Freibergs disease should be based on the joint injury and the patients should be informed about the cosmetic problems like shortening which may arise from resection.


Turkish journal of trauma & emergency surgery | 2015

The comparison of triceps-reflecting anconeus pedicle and olecranon osteotomy approaches in the treatment of intercondylar fractures of the humerus.

Ibrahim Azboy; Mehmet Bulut; Cahit Ancar; Abdullah Demirtaş; Emin Özkul; Mehmet Gem; Hilmi Karadeniz; Hüseyin Arslan

BACKGROUND This study aimed to evaluate the functional outcomes of patients with intra-articular distal humerus fractures treated with triceps-reflecting anconeus pedicle (TRAP) and olecranon osteotomy. METHODS Forty patients with intra-articular distal humerus fractures were retrospectively analyzed. TRAP approach was used in 22 patients (12 males, 10 females; mean age 37.8 years, range 17-70), and olecranon osteotomy in 18 patients (11 males, 7 females; mean age 35.4 years, range 18-62). Fractures were classified using the AO/ASIF classification. Functional results were evaluated with the Mayo elbow performance score (MEPS) and the Disabilities of Arm, Shoulder and Hand (DASH) questionnaire score. RESULTS The overall mean arc of elbow motion was 108° (range 70°-140°) in the TRAP group, whereas that of the olecranon osteotomy group was 98° (range 70°-115°). A significant difference was observed between the two groups in terms of overall mean arc of elbow motion (p=0.038). There were no significant differences noted between the two groups in terms of mean MEPS and DASH scores (p=0.412, p=201, respectively). The overall complication rate was 27.2% in the TRAP group and 55% in the olecranon osteotomy group. CONCLUSION TRAP is a succesful approach in the treatmet of intra-articular distal humerus fractures that provides better arc of elbow motion, reduces complications and reoperation rates.


Journal of Pediatric Orthopaedics | 2015

Segmental bone loss in pediatric lower extremity fractures: indications and results of bone transport.

Hüseyin Arslan; Emin Özkul; Mehmet Gem; Celil Alemdar; İlhami Şahin; Bülent Kişin

Background: In this study, we evaluated the results of external bone transport, which was applied to 11 patients with traumatic bone loss who had not completed their bone development. Methods: The average age of the 9 male and 2 female patients was 10.6 (range, 8 to 16) years. Eight of the defects were located in the tibia, whereas the other 3 were in the femur. The average defect was 5.4 (range, 4.5 to 8.5) cm. External bone transport was applied in the early period in 7 patients, whereas in 4 patients it was performed due to nonunion. Bifocal osteosynthesis and single osteotomy were performed in 2 patients with type B2 nonunion. Compression to the nonunion region and lengthening in the osteotomy region were applied. In 2 patients with type B1 nonunion, and the other 9 patients who had external bone transport, the gap was eliminated by bifocal osteosynthesis, single osteotomy, and bone transport to the osteotomy line. Results: The mean follow-up period was 21 (range, 13 to 48) months. Complete union was achieved in all patients without any bone operation or graft application. No refracture was observed after the removal of the external fixator, and the average hospitalization time was 16 (range, 7 to 65) days. The average external fixation time was 4.2 (range, 3.5 to 5.5) months, and the mean external fixator index was 0.8 months (23 d/cm). The mean bone healing time was 5.1 (range, 4.6 to 6) months. Conclusions: To initially consider the open fractures with true or in situ bone loss in children as “anticipated nonunion,” and determine the treatment strategies regarding this fact, may prevent nonunion and shorten the healing period. Bone transport in the treatment of traumatic bone defects in children is an easy biological procedure, with lower complications but higher success ratios. Level of Evidence: Level IV—therapeutic.


African Journal of Pharmacy and Pharmacology | 2011

Clinical and radiological results of posterior instrumentation without fusion for thoracolumbar fractures

Serdar Sargın; Bekir Yavuz Uccedil; Serdar Necmioğlu; Mehmet Bulut; Mehmet Gem

A retrospective study of clinical and radiological results of nonfusion operative treatment for thoracolumbar fractures. In this study, we aimed to demonstrate that fusion was not always required in the surgical treatment with posterior instrumentation for thoracolumbar vertebral fractures and to show the success of surgical treatment without fusion. Fusion was added considering failure of the implant and inability to maintain the corrected kyposis angle after posterior instrumentation for thoracolumbar vertebral fractures. Fusion related problems such as the fusion-induced loss of stability in posterior elements, graft donor site problems, increased blood loss, allograft associated infections, and prolonged operation time, focus attention on surgical treatment without fusion. We intended to demonstrate the alignment and stability of the spine in the coronal and sagittal planes after treatment without fusion. Kyphosis angle and the extent of the collapse were measured in preoperative, postoperative and final examination films of 60 patients with thoracolumbar vertebral fractures. Based on the computerized tomography and magnetic resonance images of the patients, we evaluated intracanal fragments, the presence of pedicle and laminar fractures, posterior ligamentous complex status and the presence of medullary edema. With an aim to evaluate pain and quality of life of the

Collaboration


Dive into the Mehmet Gem's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge