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Dynamic anterior cervical plate

Joshua M Peterson, Carolyn Chlebek, Ashley M Clough, Alexandra K Wells, Kathleen E Batzinger, John M Houston, Katerina Kradinova, Joseph C Glennon, Darryl J DiRisio, Eric H Ledet
STUDY DESIGN: Real time in vivo measurement of forces in the cervical spine of goats following anterior cervical discectomy and fusion (ACDF). OBJECTIVE: To measure interbody forces in the cervical spine during the time course of fusion following ACDF with plates of different stiffnesses. SUMMARY OF BACKGROUND DATA: Following ACDF, the biomechanics of the arthrodesis is largely dictated by the plate. The properties of the plate prescribe the extent of load-sharing through the disc space versus the extent of stress-shielding...
March 19, 2018: Spine
Vinaysagar Sharma, Shashwat Kumar Singh
Introduction: Anterior cervical discectomy is a surgical procedure performed to treat a herniated/degenerated disc in the cervical region. There have been various studies comparing arthrodesis rates among various procedures. Our patients belonged to varied socioeconomic background and underwent anterior cervical microdiscectomy without/with instrumentation. Aim: The present study was performed to study and compare the arthrodesis rates in the patients operated for anterior cervical microdiscectomy with and without fusion/instrumentation procedures at our institution...
January 2018: Journal of Neurosciences in Rural Practice
Eric H Ledet, Glenn P Sanders, Darryl J DiRisio, Joseph C Glennon
BACKGROUND: Context: Achieving a successful spinal fusion requires the proper biologic and biomechanical environment. Optimizing load-sharing in the interbody space can enhance bone formation. For anterior cervical discectomy and fusion (ACDF), loading and motion are largely dictated by the stiffness of the plate which can facilitate a balance between stability and load-sharing. The advantages of load-sharing may be substantial for patients with comorbidities and in multi-level procedures where pseudarthrosis rates are significant...
February 13, 2018: Spine Journal: Official Journal of the North American Spine Society
Junfeng Zeng, Yuchen Duan, Yi Yang, Beiyu Wang, Ying Hong, Jigang Lou, Ning Ning, Hao Liu
Anterior cervical corpectomy and fusion (ACCF) is an effective surgical technique for cervical spondylotic myelopathy (CSM). However, no data exist regarding long-term outcomes after ACCF with the dynamic cervical plate for CSM. This study aimed to provide minimum 5-year clinical and radiographic outcomes of anterior corpectomy and reconstruction using dynamic cervical plate and titanium mesh cage (TMC) for CSM.Thirty-five patients who underwent single- or 2-level ACCF with dynamic cervical plate and TMC for the treatment of CSM were retrospectively investigated...
February 2018: Medicine (Baltimore)
Parmenion P Tsitsopoulos, Leonard I Voronov, Michael R Zindrick, Gerard Carandang, Robert M Havey, Alexander J Ghanayem, Avinash G Patwardhan
OBJECTIVE: To test the following hypotheses: (i) anterior cervical discetomy and fusion (ACDF) using stand-alone interbody spacers will significantly reduce the range of motion from intact spine; and (ii) the use of a static or a rotational-dynamic plate will significantly augment the stability of stand-alone interbody spacers, with similar beneficial effect when compared to each other. METHODS: Eleven human cadaveric subaxial cervical spines (age: 48.2 ± 5.4 years) were tested under the following sequence: (i) intact spine; (ii) ACDF at C4 -C5 using a stand-alone interbody spacer; (iii) ACDF at C5 -C6 and insertion of an interbody spacer (two-level construct); and (iv) randomized placement of either a two-level locking static plate or a rotational-dynamic plate...
August 2017: Orthopaedic Surgery
Kuang-Ting Yeh, Ru-Ping Lee, Ing-Ho Chen, Tzai-Chiu Yu, Kuan-Lin Liu, Cheng-Huan Peng, Jen-Hung Wang, Pau-Yuan Chang, Wen-Tien Wu
Anterior cervical corpectomy and fusion (ACCF) is one of the main surgical strategies for the management of multilevel cervical spondylotic myelopathy (MCSM). High complication rates of graft bone fracture, resorption, displacement, and fusion collapse or pseudarthrosis have been previously reported. The strategies to prevent the aforementioned complications include using fresh frozen cortical strut allograft (FFCSA) to keep most of the original bone quality and using additional anterior plate fixation to improve the fusion stability and union rate...
2017: PloS One
Philipp Schleicher, Matti Scholz, Frank Kandziora, Andreas Badke, Florian Hans Brakopp, Helmut Klaus Friedrich Ekkerlein, Erol Gercek, Rene Hartensuer, Philipp Hartung, Jan-Sven Gilbert Jarvers, Philipp Kobbe, Stefan Matschke, Robert Morrison, Christian W Müller, Miguel Pishnamaz, Maximilian Reinhold, Klaus John Schnake, Gregor Schmeiser, Gregor Stein, Bernhard Ullrich, Thomas Weiß, Volker Zimmermann
In a consensus process during four sessions in 2016, the working group "lower cervical spine" of the German Society for Orthopedic and Trauma Surgery (DGOU), formulated "Therapeutic Recommendations for the Lower Cervical Spine", taking into consideration the current literature. Therapeutic goals are a permanently stable, painless cervical spine and the protection against secondary neurologic damage while retaining the greatest possible amount of motion and spinal profile. Due to its ease of use and its proven good reliability, the AOSpine classification for subaxial cervical injuries should be used...
October 2017: Zeitschrift Für Orthopädie und Unfallchirurgie
Sung H Choi, Jae H Cho, Chang J Hwang, Choon S Lee, Hyun W Gwak, Dong-Ho Lee
STUDY DESIGN: Retrospective study. OBJECTIVE: To determine whether postoperative pseudarthrosis can be predicted from specific preoperative radiograph measurements. SUMMARY OF BACKGROUND DATA: Various factors reportedly influence the occurrence of pseudarthrosis after anterior cervical discectomy and fusion (ACDF). However, to our knowledge, there are no reports on the relationships between preoperative radiographic parameters and pseudarthrosis...
December 1, 2017: Spine
David C Sing, Lionel N Metz, Stefan Dudli
STUDY DESIGN: Retrospective review. OBJECTIVE: To identify the top 100 spine research topics. SUMMARY OF BACKGROUND DATA: Recent advances in "machine learning," or computers learning without explicit instructions, have yielded broad technological advances. Topic modeling algorithms can be applied to large volumes of text to discover quantifiable themes and trends. METHODS: Abstracts were extracted from the National Library of Medicine PubMed database from five prominent peer-reviewed spine journals (European Spine Journal [ESJ], The Spine Journal [SpineJ], Spine, Journal of Spinal Disorders and Techniques [JSDT], Journal of Neurosurgery: Spine [JNS])...
June 1, 2017: Spine
Gregory D Schroeder, Christopher K Kepler, Douglas A Hollern, Ricardo Rodrigues-Pinto, Mark F Kurd, Jefferson R Wilson, Mitchell G Maltenfort, Jonathan T Paul, Andrew N Fleischman, Kathryn Dwight, Paul W Millhouse, Alexander R Vaccaro
STUDY DESIGN: A systematic review. OBJECTIVE: To determine the effect of plate design on fusion rates in patients undergoing a 1- and 2-level anterior cervical discectomy and fusion (ACDF). METHODS: Articles published between January 1, 2002 and January 1, 2015 were systematically reviewed to determine the fusion rate of 1- and 2-level ACDFs using either a fully constrained or semiconstrained locking plate. Additional variables that were collected included the number of levels, the type of graft/cage used, the study design, the method for determining fusion, and complications...
February 2017: Clinical Spine Surgery
Moon Soo Park, Seong-Hwan Moon, Hwan-Mo Lee, Seok Woo Kim, Tae-Hwan Kim, Seul Ki Min, Bo-Kyung Suh, K Daniel Riew
STUDY DESIGN: A retrospective study OBJECTIVE:: To evaluate radiographic changes of patients with osteophytes at the anterior border of the caudal vertebral body who were treated with anterior cervical discectomy and fusion (ACDF) using dynamic rotational plates. SUMMARY OF BACKGROUND DATA: Dynamic cervical plates are widely used in surgeries of the anterior cervical spine. One concern in using dynamic plates is that the subjacent anterior osteophytes might act as a bony block and prevent dynamization of the plate...
June 3, 2016: Clinical Spine Surgery
A Mackiewicz, M Banach, A Denisiewicz, R Bedzinski
BACKGROUND: The object of the study was to assess the impact of one-level stabilization of the cervical spine for both anterior static and dynamic plates. Segments C2-C6 of the cervical spine, were investigated, from which was determined the stress and strain fields in the region of implantation and adjacent motion segments. The purpose was the comparison of changes that affect the individual stabilizers. METHODS: For testing we used finite element analysis. The cervical spine model takes into account local spondylodesis...
February 2016: Clinical Biomechanics
Bastian Welke, Michael Schwarze, Christof Hurschler, Thorsten Book, Stephan Magdu, Dorothea Daentzer
PURPOSE AND METHODS: For the treatment of degenerative disc diseases of the cervical spine, anterior cervical discectomy and fusion (ACDF) still represents the standard procedure. However, long term clinical studies have shown a higher incidence of pathologies in the adjacent segments. As an alternative to spinal fusion, cervical total disc replacement (cTDR) or dynamically implants were increasingly used. This in vitro study analyzed the kinematics and intradiscal pressures in seven multi-segmental human cervical spine using hybrid multidirectional test method...
July 2016: European Spine Journal
Y Yan, K M Bell, R A Hartman, J Hu, W Wang, J D Kang, J Y Lee
BACKGROUND CONTEXT: Various modifications to standard "rigid" anterior cervical plate designs (constrained plate) have been developed that allow for some degree of axial translation and/or rotation of the plate (semi-constrained plate)-theoretically promoting proper load sharing with the graft and improved fusion rates. However, previous studies about rigid and dynamic plates have not examined the influence of simulated muscle loading. PURPOSE: The objective of this study was to compare rigid, translating, and rotating plates for single-level corpectomy procedures using a robot testing system with follower load...
January 2017: European Spine Journal
Hamdi G Sukkarieh, Brian Dalm, Patrick W Hitchon
No abstract text is available yet for this article.
October 2015: Clinical Neurology and Neurosurgery
A E Barysh, S A Kozyrev
Results of surgical treatment of 34 patients, suffering cervical vertebral column traumas and diseases, are analyzed. In all the patients bisegmental anterior interbody spondylodesis was conducted, using cervical rigid plates and vertical cylindrical net implants. The existing and newly obtained information about changes in the radiological indices dynamics while the method application by its authors is presented. The interbody synostosis was achieved in 82.4% patients in 1 yr after the operation. The complications rate while the implants application have constituted 23...
February 2015: Klinichna Khirurhiia
Zhong-hai Li, Shu-xun Hou, Li Li, Shun-zhi Yu, Tie-sheng Hou
OBJECTIVE: To investigate the early clinical effects and radiological outcome of dynamic cervical implant (DCI) internal fixation in treating cervical spondylosis, and evaluate its safety and efficiency. METHODS: From June 2009 to December 2011, 19 patients with cervical spondylosis correspond to the indication of DCI internal fixation in the study, including 5 cases of cervical spondylotic myelopathy and 14 cases of cervical spondylotic radiculopathy. There were 8 males and 11 females, aged from 35 to 54 years with a mean of 43...
December 2014: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Brandon D Lawrence, Alpesh A Patel, Andrew Guss, W Ryan Spiker, Darrel S Brodke
STUDY DESIGN: Biomechanical evaluation. OBJECTIVE: To evaluate the kinematic and load-sharing differences of dynamic anterior cervical plates when placed in-line at 0° and off-axis at 20°. SUMMARY OF BACKGROUND DATA: The use of dynamic anterior cervical plating systems has recently gained popularity due to the theoretical benefit of improved load sharing with graft subsidence. Occasionally, due to anatomical restraints, the anterior cervical plate may be placed off-axis in the coronal plane...
December 1, 2014: Spine
Xiang Guo, Ming Lu, Ning Xie, Qunfeng Guo, Bin Ni
STUDY DESIGN: A retrospective clinical study was conducted and related literatures were reviewed. OBJECT: This study aimed to evaluate outcome of multilevel anterior cervical discectomy and fusion with plate fixation for juvenile unilateral muscular atrophy of the distal upper extremity accompanied by cervical kyphosis. SUMMARY OF BACKGROUND DATA: Juvenile unilateral muscular atrophy of the distal upper extremity is a rare disease. Traditional treatment uses a neck collar to immobilize neck motion...
October 2014: Journal of Spinal Disorders & Techniques
Vivek Palepu, Ali Kiapour, Vijay K Goel, James M Moran
BACKGROUND: The efficacy of dynamic anterior cervical plates is somewhat controversial. Screws in static-plate designs have a smaller diameter and can cut through bone under load. While not ideal, this unintended loosening can help mitigate stress shielding. Stand-alone interbody devices with integral fixation have large endplate contact areas that may inhibit or prevent loosening of the fixation. This study investigates the load sharing ability of a novel dynamic plate design in preventing the stress shielding of the graft material compared to the non-dynamic devices...
2014: Biomedical Engineering Online
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