Results 81 to 90 of about 4,335 (188)

Comparative Analysis of Three Vertebral Screw Placement Directions in Anterior Thoracolumbar Fracture Surgery: A Finite Element Study

Orthopaedic Surgery, Volume 17, Issue 5, Page 1464-1477, May 2025.
This study compares the biomechanical effects of three anterior fixation systems in thoracolumbar surgery—HXTL, NHXTL, and Medtronic's CD Horizon ANTERIOR. Finite element analysis evaluates stress and displacement across vertebral bodies and support structures under varying load conditions. Results indicate the HXTL system minimizes nail–rod stress yet
Xuehai Jia, Yanjun Xie, Yi Yang, Yi Deng, Kerui Zhang, Changyong Shen, Ya Li, Litai Ma   +7 more
wiley   +1 more source

Positioning of pedicle screws in adolescent idiopathic scoliosis using electromyography [PDF]

, 2015
OBJECTIVE: To analyze the occurrence of poor positioning of pedicle screws inserted with the aid of intraoperative electromyographic stimulation in the treatment of Adolescent Idiopathic Scoliosis (AIS).METHODS: This is a prospective observational study ...
Bruno Moreira Gavassi, Ferreira,Ricardo José Rodriguez, Barsotti,Carlos Eduardo Gonçales, Ricardo José Rodriguez Ferreira, Carlos Eduardo Gonçales Barsotti, Carlos Eduardo Algaves Soares de Oliveira, Gavassi,Bruno Moreira, Oliveira,Carlos Eduardo Algaves Soares de, Pratali,Raphael de Rezende, Francisco Prado Eugenio dos Santos, Raphael de Rezende Pratali, Santos,Francisco Prado Eugenio dos   +11 more
core   +1 more source

The Role of Pedicle Screw Surface on Insertion Torque and Pullout Strength [PDF]

Revista Brasileira de Ortopedia
Objective Compare by mechanical tests the pullout resistance and the insertion torque of rough and smooth pedicle screws. Methods Pedicle screws with rough surface and smooth surface, with diameters of 4.8; 5.5 and 6.5 mm, were inserted in polyurethane ...
Rodrigo Barra Caiado Fleury, Antônio Carlos Shimano, Thiago Dantas Matos, Kelsen de Oliveira Teixeira, Valéria Romero, Helton Luiz Aparecido Defino   +5 more
doaj   +4 more sources

Factors and Experiences Associated With Unscheduled Hospital Readmission After Lateral Lumbar Interbody Fusion: A Case–Controlled Study

Orthopaedic Surgery, Volume 17, Issue 5, Page 1389-1396, May 2025.
The research utilized a case–control approach to contrast patients experiencing unscheduled readmissions with those undergoing planned readmissions due to staged surgery. Findings indicated a 3.88% rate of unscheduled readmissions, mainly linked to adjacent segment disease, with 3.35% necessitating reoperation.
Wangmi Liu, Feng Zhang, Yiqing Tao, Hao Li, Qixin Chen, Fangcai Li   +5 more
wiley   +1 more source

Schematic drawing showing the designation of synthetic vertebrae instrumented with various pedicle screws. [PDF]

, 2019
Different-sized screws were chosen and randomly implanted into each pedicle of the vertebrae by an experienced surgeon, 6.0 mm × 45 mm, 6.0 mm × 50 mm, and 6.5 mm × 45 mm screws were inserted sequentially into the semi-pedicle (left side of A, B, C) and ...
Ming-Kai Hsieh (6894410), Mu-Yi Liu (840475), Chi-Chien Niu (803061), Jin-Kai Chen (6894413), Po-Liang Lai (93735), Ching-Lung Tai (50715), Tsung-Ting Tsai (664001)   +6 more
core   +1 more source

Is the postoperative pedicle screw position after dorsal instrumentation with or without intraoperative cone beam CT imaging worse in patients with obesity than in normal-weight patients?

Journal of Orthopaedic Surgery and Research, 2022
Background Intraoperative cone beam CT (CBCT) imaging in dorsal instrumentation facilitates pedicle screw positioning. However, in patients with obesity, the benefit may be reduced due to artifacts that affect image quality. The purpose of this study was
Felix Zimmermann, Katharina Kohl, Eric Mandelka, Paul A. Grützner, Jochen Franke, Sven Y. Vetter   +5 more
doaj   +1 more source

Establishing a Staging System for Adjacent Segment Disease and Exploring Its Significance in Guiding Surgical Decisions: A Retrospective Study

Orthopaedic Surgery, Volume 17, Issue 5, Page 1418-1432, May 2025.
Developed a staging system for adjacent segment disease based on degeneration characteristics. Verified the feasibility and reliability of stage‐guided surgical decision‐making through surgical data, radiological data, and follow‐up data. This staging system was closely correlated with intervertebral disc degeneration and disc height while also ...
Changpeng Qu, Jianwei Guo, Hao Tao, Chuanli Zhou, Kai Zhu, Yihao Sun, Lei Li, Zhiming Liu, Hao Zhang, Xuexiao Ma   +9 more
wiley   +1 more source

Fenestrated Screws Augmented with PMMA Increase the Pull-out Strength of Sacral Pedicle Screws [PDF]

, 2017
STUDY DESIGN:: Biomechanics. OBJECTIVE:: The objective of this study was to compare the fixation in osteoporotic specimens of a bicortical sacral pedicle screw to the following constructs: a unicortical solid screw augmented with PMMA (TRACT), a ...
Pond, Jonathan, William R. Spiker, Matthew Colman, Kent Bachus, Brodke, Darrel S, Colman, Matthew, Jonathan Pond, Spiker, William R, Bachus, Kent, Brandon D. Lawrence, Darrel S. Brodke, Lawrence, Brandon D   +11 more
core   +1 more source

Endoscopic‐Assisted Posterior Atlantoaxial Fusion: Technical Innovation and Clinical Experience

Orthopaedic Surgery, EarlyView.
Endoscopic‐assisted posterior atlantoaxial lateral mass fusion is introduced as a novel minimally invasive technique for treating atlantoaxial instability. The approach enables direct visualization, precise fixation, and effective bone fusion while minimizing muscle dissection, blood loss, and postoperative pain, achieving rapid neurological and ...
Jichong Zhu, Chengqian Huang, Jiang Xue, Jiarui Chen, Yufan Xu, Dequan Liu, Xinli Zhan, Chong Liu   +7 more
wiley   +1 more source

A new concept for implant fixation: bone-to-bone biologic fixation [PDF]

European Cells & Materials, 2015
Many attempts have been made to reduce complications of bone implant, such as pedicle screw loosening. To address this problem, the authors suggest a new concept of bone-to-bone biologic fixation using recombinant human bone morphogenetic protein-2 ...
D-Y Kim, J-R Kim, KY Jang, K-B Lee
doaj