Yazar "Özer, Ali Fahir" için listeleme
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Biomechanical changes in cervical spine sequencing after rigid lumbar stabilization
Başak, Ahmet Tulgar; Özbek, Muhammet Arif; Özer, Ali Fahir (Galenos Publishing House, 2022)Objective: Surgical stabilization of the thoraco-lumbar spine can induce biomechanical changes in other spinal regions, potentially influencing postoperative outcome. This study detected biomechanical changes in cervical ... -
Biomechanical changes in the cervical spine alignment after lumbar dynamic stabilization
Başak, Ahmet Tulgar; Özbek, Muhammet Arif; Özer, Ali Fahir (Galenos Publishing House, 2022)Objective: The aim of this study is to determine the biomechanical changes in cervical spine parameters following the surgical correction of lumbar deformity with dynamic stabilization, and to evaluate how the preoperative ... -
Biomechanical study on three screw-based atlantoaxial fixation techniques: A finite element study
Erbulut, Deniz Ufuk; Mumtaz, Muzammil; Zafarparandeh, Iman; Özer, Ali Fahir (Korean Society of Spine Surgery, 2022)Study Design: This is a finite element study. Purpose: This study is aimed to compare the biomechanical behaviors of three screw-based atlantoaxial fixation techniques. Overview of Literature: Screw-based constructs that ... -
A combined diagnosis and treatment algorithm for spine infection management: A single-center experience
Başak, Ahmet Tulgar; Çakıcı, Nazlı; Özbek, Muhammet Arif; Hekimoğlu, Mehdi; Çerezci, Önder; Ateş, Özkan; Öktenoğlu, Tunç; Sasani, Mehdi; Özer, Ali Fahir (Cureus Inc., 2022)Background and objectiveSpinal infection (SI) is an infectious disease affecting the vertebral column, spinal cord, and adjacent structures. The infection can occur following interventions or spontaneously. The aim of this ... -
Complications of 2-level dynamic stabilization: A correlative clinical and radiological analysis at two-year follow-up on 103 patients
Çıplak, Necati Mert; Süzer, Tuncer; Şentürk, Salim; Yaman, Onur; Sasani, Mehdi; Öktenoğlu, Tunç; Yılmaz, Atilla; Erbulut, Deniz Ufuk; Özer, Ali Fahir (Turkish Neurosurgical Society, 2018)AIM: To investigate the postoperative complications, such as screw loosening, screw breakage and adjacent segment disease (ASD), in patients who underwent surgery with 2-level dynamic stabilization systems. MATERIAL and ... -
How to reduce stress on the pedicle screws in thoracic spine? Importance of screw trajectory: A finite element analysis
Güvenç, Yahya; Akyoldaş, Göktuğ; Şentürk, Salim; Erbulut, Deniz; Yaman, Onur; Özer, Ali Fahir (Turkish Neurosurgical Society, 2019)AIM: To investigate the biomechanical comparison of thoracic transpedicular screw trajectories on the sagittal plane. MATERIAL and METHODS: A three-dimensional, non-linear finite element analysis (FEA) model of T8 through ... -
Influence of three-dimensional reconstruction method for building a model of the cervical spine on its biomechanical responses: A finite element analysis study
Zafarparandeh, İman; Erbulut, Deniz Ufuk; Özer, Ali Fahir (Hindawi Publishing Corporation, 2016)In some finite element analysis studies of models of sections of the spine, the three-dimensional solid model is built by assuming symmetry about the mid-sagittal plane of the section, whereas in other studies, the model ... -
Lumbar dynamic stabilization with 2-stage surgery: early results
Özer, Ali Fahir; Başak, Ahmet Tulgar; Özbek, Muhammet Arif; HekimoǧLu, Mehdi; Aydın, Ahmet Levent; Ateş, Özkan; Günerbüyük, Caner; Akgül, Turgut; Sasani, Mehdi; Öktenoǧlu, Tunç (ISASS-The International Society for the Advancement of Spine Surgery, 2022)Background: Screw loosening, which is a major problem in dynamic systems, can be easily overcome with 2-stage surgery. In this article, the clinical and radiological results of patients undergoing dynamic stabilization ... -
Lumbar single-level dynamic stabilization with semi-rigid and full dynamic systems: A retrospective clinical and radiological analysis of 71 patients
Özer, Ali Fahir; Öktenoğlu, Tunç; Egemen, Emrah; Sasani, Mehdi; Yılmaz, Atilla; Erbulut, Deniz Ufuk; Yaman, Onur; Süzer, Tuncer (Korean Orthopaedic Association, 2017)Background: This study compares the clinical and radiological results of three most commonly used dynamic stabilization systems in the field of orthopedic surgery. Methods: A total of 71 patients underwent single-level ... -
Management of type II odontoid fractures for osteoporotic bone structure: Preliminary report
Coşar, Murat; Özer, Ali Fahir; Alkan, Bahadır; Güven, Mustafa; Akman, Tarık; Aras, Adem Bozkurt; Ceylan, Davut; Tokmak, Mehmet (Turkish Neurosurgical Society, 2015)AIM: Anterior transodontoid screw fixation technique is generally chosen for the management of type II odontoid fractures. The nonunion of type II odontoid fractures is still a major problem especially in elderly and ... -
Motion analysis study on sensitivity of finite element model of the cervical spine to geometry
Zafarparandeh, Iman; Erbulut, Deniz Ufuk; Özer, Ali Fahir (SAGE Publishing Ltd, 2016)Numerous finite element models of the cervical spine have been proposed, with exact geometry or with symmetric approximation in the geometry. However, few researches have investigated the sensitivity of predicted motion ... -
A new lumbar fixation device alternative to pedicle-based stabilization for lumbar spine: In vitro cadaver investigation
Gömleksiz, Cengiz; Erbulut, Deniz Ufuk; Can, Halil; Kodigudla, Manoj Kumar; Kelkar, Amey V.; Kasapoglu, Eser; Özer, Ali Fahir; Goel, Vijay K. (Taylor and Francis Ltd., 2020)Context: To evaluate the stability provided by a new bilateral fixation technique using an in vitro investigation for posterior lumbar segmental instrumentation. Design: Experimental cadaver study. In this study, we propose ... -
Servikal omurga sonlu eleman modellemesinde, model geometrisinin biyomekanik parametrelere olan etkisi
Zafarparandeh, Iman; Erbulut, Deniz Ufuk; Özer, Ali Fahir (Institute of Electrical and Electronics Engineers, 2015)İnterspinus implantları, omurga stenosis ve faset artiritis gibi omurga patolojileri için kullanıldığı bilinir. Tasarımındaki ana düşünce spinos proseslere kuvvet uygulayarak birbirinden uzaklaştırmak ve klinisyenlerin ...