Nazım Karahan

Fatih Sultan Mehmet Training and Research Hospital

Background: The objective of this study was to evaluate the efficacy of subacromial injections of collagenase and corticosteroid in rats with experimentally-induced adhesive capsulitis. Method: Thirty adult Wistar albino male rats were distributed into 3 groups of 10 rats each after stabilization of their shoulders for 3 weeks: the first group r...

Purpose The aim of the study was to evaluate whether or not there was any incompatibility between two-strand hamstring tendons taken from the same knee and the ATFL and it was the determination of suitable footprint points in the fibula and talus for anatomical ATFL reconstruction. Methods 16 fresh frozen cadaver specimens were dissected to gracil...

Objective: The aim of this study was to evaluate glenohumeral morphologic differences and their correlation between glenohumeral instability and rotator cuff pathology. Methods: Two-hundred radiographs and 100 MRI scans of 100 patients in whom the diagnosis of Anterior Shoulder Instability (Anl) or Rotator Cuff Tear (RCT) was arthroscopically ve...

Objective: The aim of this study was to investigate whether collagenase clostridium histolyticum (CCH) reduces intra-articular fibrotic adhesion formation in a rat model of arthrofibrosis. Methods: A total of 24 male Wistar rats (7 months old, weighing 220 -275 g) were randomly and equally assigned to one of two groups: the collagenase group and...

Background: The purpose of this study is to investigate the quality and reliability of YouTube videos regarding developmental dysplasia of the hip (DDH).YouTube is one of the most popular websites used as a source of information, but the variety in authorship and lack of a peer-review process are problems. Methods: The search string “developmental...

Purpose: This study aimed to evaluate whether cilostazol (phosphodiesterase III inhibitor) could enhance the healing of Achilles tendon ruptures in rats. Materials and methods: The Achilles tendons of 24 healthy male adult rats were incised and repaired. The rats were randomly allocated to cilostazol and control groups. The cilostazol group rece...

Objectives Our aim in the study was evaluating sacroiliac morphology in patients with DDH and its possible effect on appropriate iliosacral screw fixation. Design Retrospective cohort study. Setting Level of evidence 3. Patients/participants We evaluated the anteroposterior pelvis X-ray and pelvic CT scans of patients. We mainly divided the pati...

Aim: Bioactive glass (Bioglass) is a substance causing strong mechanical bondings at the interface of soft tissue-biomaterial-bone through a series of biochemical and biophysical reactions, commonly used to restore developing bone defects due to surgery. On the other hand, phosphatidylcholine is a lipid substance increasing antibiotics’ efficiency...

PURPOSE OF THE STUDY Most humeral nonunions can be successfully treated with a single procedure, but some are more difficult to heal. Humeral nonunions which have two or more surgical procedures were defined as refractory humeral nonunions, and this condition is a very challenging condition. The aim of the study is to show the results of atrophic r...

Background: To evaluate whether there are any differences in the efficacies of microfracture (MF) surgeries used in the treatment of focal cartilage lesions alone or in combination with adjuvant therapies. Methods: 42 rats were included in the study. Group 1 received MF alone, Group 2 received platelet rich plasma (PRP) after MF, Group 3 received h...

Lateral closed wedge versus reverse-V in cubitus varus Lateral closed wedge versus reverse-V osteotomy for cubitus varus: A saw-bone study Abstract Aim: In this study, we aimed to perform a biomechanical comparison of Lateral Closed Wedge (LCW) osteotomy and Reverse-V osteotomy techniques in cubitus varus surgery. Material and Methods: Thirty-six a...

Aim:Tendon transfers and autografts can be used in the reconstruction of chronic peroneal tendon tears. This cadaveric study aimed to evaluate the use of autograft hamstring tendons to reconstruct peroneal tendons in terms of diameter suitability.Materials and Methods:In this study, 13 hamstring tendons (gracilis, semitendinosus) without macroscopi...

Background In sawbones with proximal humerus fracture model, three different fixation configurations, Parallel-Straight K-wires, Cross-Straight K-wires and Palm-Tree Method, were biomechanically compared. Methods A total of 36 anatomical pediatric humerus sawbones models were used. They were divided into three equal groups; parallel fixation with...

Background: Evaluating concomitant injury in patients with anterior cruciate ligament (ACL) rupture is important for predicting long-term results. Meniscofemoral ligament (MFL) rupture has been observed in patients with anterior cruciate ligament rupture in arthroscopic evaluation for ruptured ACL. Objectives: The objective of this study was to inv...

Aim: In this study, we aimed to evaluate the long-term clinical functional results of patients who were operated with the diagnosis of ankle arthrosis with three different techniques. Methods: 49 cases who were operated between 2002 and 2013 were evaluated retrospectively. The patients who underwent arthrodesis with Ilizarov technique were evaluate...

Background: Anterior talofibular ligament (ATFL) injuries are the most common in ankle torsional injuries. ATFL and peroneal tendons are both important stabilizers of lateral ankle joint. We aimed to evaluate peroneal tendons and ATFL. Methods: Fifteen nonpaired leg of fresh frozen cadavers were assessed in this study. After harvesting, ATFL diamet...

Purpose: This study was conducted to histopathologically compare the results of the administration of intra-articular PDRN and HA injections in experimentally induced OA in rats. Methods: Osteoarthritis of the knee joints was induced in a total of 30 rats. Rats were randomly divided into three groups; polydeoxyribonucleic (PDRN) acid group, hyaluro...

Objective The purpose of this study is to investigate the quality and reliability of YouTube videos regarding developmental dysplasia of the hip (DDH). Background YouTube is one of the most popular websites used as a source of information, but the variety in authorship and lack of a peer-review process are problems. Methods The search string “devel...

Background The rapid form of subcutaneous emphysema after an insect bite is hard to distinguish from necrotizing fasciitis. Case presentation Here we report a case of benign subcutaneous emphysema after an insect bite on the hand of an 18-year-old Caucasian man. The puncture area in the first web space of his hand was erythematous and swollen. Aft...

IntroductionThere are not enough studies demonstrating the results of the modified Ponseti method on iatrogenic complex clubfoot that occurs due to errors during the application of the method for treating idiopathic clubfoot. The present study aimed to present the treatment results of the modified method reported by Ponseti for treating feet that b...

Purpose: To present the results of arthroscopic treatment of acute septic arthritis of the hip joint in children aged 10 years or younger. Methods: Patients with a minimum follow-up period of 2 years who underwent arthroscopic treatment (anterolateral and medial subadductor 2-portal approach) of acute septic arthritis of the hip joint between Ja...

Objectives: Aim is to investigate the morphology of the knee of the people living in our country and to evaluate the harmony of the knee arthroplasty with their prosthetics, which are widely used in our country. Methods: In this study, 200 patients, who had a CT taken for the angio of the lower extremity for various reasons, were included. Among 20...

Objective: To show the effects of corticosteroids on inflammatory reactions in the injured Achilles tendon in rats. Material and method: Thirty-two adult Wistar Albino rats were used in the study. The rats were divided into 4 groups. In the first group (Intact Saline), saline solution was injected to the intact Achilles tendon. In the second gro...

Objective: The aim of this study was to investigate whether there are glenohumeral morphological differences between normal population, glenohumeral instability, and rotator cuff pathology. Method: In this study, shoulder magnetic resonance (MR) images of 150 patients were evaluated. Patients included in the study were studied in three groups of...

Aim The histological effects of intra-articular polydeoxyribonucleic acid and hyaluronic acid in experimentally induced osteoarthritis of the knee joints of rats were investigated. Methods Thirty rats were divided into three groups, i.e. polydeoxyribonucleic acid group, hyaluronic acid group and saline group. Osteoarthritis of the knee joints of t...

Objective: The purpose of this study was to investigate different treatment methods employed by orthopedic surgeons for open tibial fracture in adults. Methods: Survey of 12 questions regarding treatment of open tibial fracture was conducted with 285 orthopedics and traumatology specialists in Turkey in personal interviews and using web-based techn...