Results 91 to 100 of about 128,782 (181)

Bone density optimized pedicle screw instrumentation improves screw pull-out force in lumbar vertebrae

, 2021
Pedicle screw instrumentation is performed in the surgical treatment of a wide variety of spinal pathologies. A common postoperative complication associated with this procedure is screw loosening.
Spirig, José Miguel, Farshad, Mazda, Widmer, Jonas, Senteler, Marco, Snedeker, Jess G, Caprara, Sebastiano; https://orcid.org/, Fasser, Marie-Rosa, Caprara, Sebastiano, Spirig, José M., Snedeker, Jess Gerrit; id_orcid, Ca, Mazda Farshad, José Miguel Spirig, Sebastiano Caprara, Marie-Rosa Fasser, Marco Senteler, Jess G. Snedeker, Jonas Widmer   +17 more
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Biomechanical effects of lateral pedicle wall violation and subsequent screw redirection on pedicle screw anchorage

Purpose To investigate the biomechanical effects of lateral pedicle wall violation (LPWV) and subsequent screw redirection on pedicle screw anchorage under cyclic loading ...
Rene Schmid, Werner Schmoelz, Peter W Ferlic, Richard Bostelmann, Anna Spicher, Richard A. Lindtner, Romed Hörmann, Tim Egelseer   +7 more
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Biomechanical comparison of cervical discectomy/fusion model using allograft spacers between anterior and posterior fixation methods (lateral mass and pedicle screw)

, 2020
Background: The purpose of this study is to investigate effects of different fixation methods on the physical stress on allospacers, endplate-vertebral body, and implants using finite element model analyses.
이환모, 문성환, 이병호
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Analysis of Pullout Strength and Pedicle Screw Loosening from Loading Rigid Rod Construct

, 2009
Introduction: Pedicle screws have been used for many different purposes in order to provide effective fixation between a metal interface like a rod or plate to a vertebral body. These screws generally fixate in a proper and secure manner in patients with
Kaimrajh, D, Milne, E. L, Barreto, A, E. L. Milne, L. L. Latta, Latta, L. L, A. Barreto, D. Kaimrajh   +7 more
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Prediction of screw loosening by measuring the insertion torque in non-osteoporotic patients: an in vitro study

BMC Musculoskeletal Disorders
Background Pedicle screws are commonly used in spinal surgeries, but screw loosening remains a major concern, even in non-osteoporotic patients. Predicting pedicle screw stability via the insertion torque is a controversial topic, mainly studied on ...
Jan Ulrich Jansen, Laura Zengerle, Carsten Hackenbroch, Jens Dreyhaupt, Youping Tao, Hans-Joachim Wilke   +5 more
doaj   +1 more source

Mechanical evaluation of pedicle screw fixation of the lumbar spine [PDF]

, 1997
Pedicle screw fixation of the lumbar spine has been reported to increase fusion rates A biomechanical evaluation of four different pedicle screw implant systems, (AO. Rogozinski, TSRH and Wiltse). was performed to compare intrinsic device stiffness under
Lu, Ding
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Impact of screw tip design on screw anchorage: mechanical testing and numerical simulation

Journal of Orthopaedic Surgery and Research
Background Screw loosening is a commonly reported issue following spinal screw fixation and can lead to various complications. The initial cause of screw loosening is biomechanical deterioration.
Shiming Xie, Liqiang Cui, Jinhui Liu, Peidong Qing, Jingchi Li   +4 more
doaj   +1 more source

Three-Dimensional Hounsfield Units Measurement of Pedicle Screw Trajectory for Predicating Screw Loosening in Lumbar Fusion Surgery

Clinical Interventions in Aging, 2023
He Zhao,1,* Yan-jun Wang,1,* Rui-guo Wang,2 Da Liu,3 Ya-qing Duan,4 Yang-jin Liu,1 Yu-hong Zeng,5 Qin-peng Zhao,2 Zheng-ping Zhang2 1Department of Emergency Medicine, Honghui Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi, 710054, People’s ...
Zhao H, Wang Y, Wang R, Liu D, Duan Y, Liu Y, Zeng Y, Zhao Q, Zhang Z   +8 more
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Effects of the Insertion Type and Depth on the Pedicle Screw Pullout Strength: A Finite Element Study

Applied Bionics and Biomechanics, 2018
Purpose. The pedicle screw is a surgical device that has become widely used in spinal fixation and stabilization. Postsurgical complications such as screw loosening due to fatigue loading and screw breakage still need investigations.
K. Jendoubi, Y. Khadri, M. Bendjaballah, N. Slimane   +3 more
doaj   +1 more source

True anteroposterior view pedicle screw insertion technique

, 2016
Jia-yue Bai, Wei Zhang, Ji-long An, Ya-peng Sun, Wen-yuan Ding, Yong Shen Key Biomechanical Laboratory of Orthopedics, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, People’s Republic of China Background: The wide use of ...
Zhang W, Bai JY, An JL, Ding WY, Shen Y, Sun YP   +5 more
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