scholarly journals The Cervical Spine Study Group anterior cervical plate nomenclature

2002 ◽  
Vol 12 (1) ◽  
pp. 1-6 ◽  
Author(s):  
Regis W. Haid ◽  
Kevin T. Foley ◽  
Gerald E. Rodts ◽  
Bryan Barnes
Keyword(s):  
Cervical Spine ◽  
Classification System ◽  
Study Group ◽  
Review Of The Literature ◽  
New Classification ◽  
Plate Interface ◽  
Translational Movement ◽  
Laboratory Investigations ◽  
Cervical Plate ◽  
Anterior Cervical Plate

The authors review historical and biomechanical aspects of anterior cervical plate (ACP) systems. They propose a novel classification system for ACPs based on the biomechanical and graft-loading properties of these systems. A retrospective review of the literature comprising both clinical and laboratory investigations regarding the ACP system was undertaken. Comparison of each system is considered in the context of the biomechanical attributes and graft-loading properties of each type of plate. Salient characteristics reviewed include restriction of screw backout, screw-angle variability, and mobility at the screw–plate interface. A new classification system for ACPs is proposed that primarily considers the ability of the construct to restrict screw backout, as well as the properties of the plate–screw interface—that is, the capacity for rotational or translational movement. A new classification system is presented that provides unified, biomechanically descriptive nomenclature. Using this nomenclature, the ACP devices currently available and those developed in the future can be uniformly categorized.

In Vitro Comparison of a Translational Anterior Cervical Plate With a Constrained Anterior Cervical Plate

2001 ◽  
Author(s):  
Denis J. DiAngelo ◽  
Weiqiang Liu ◽  
Kristine M. Olney ◽  
Kevin T. Foley
Keyword(s):  
Cervical Spine ◽  
Cervical Spondylosis ◽  
Load Transfer ◽  
Multi Level ◽  
Cervical Plate ◽  
Degenerative Disorder ◽  
Anterior Cervical Plate ◽  
Cervical Plating ◽  
In Vitro Comparison

Abstract Cervical spondylosis is the most common degenerative disorder affecting the cervical spine and is often treated surgically to prevent further neurological deterioration. However, clinical experience has shown that anterior cervical plating does not prevent construct failure in multi-level cervical corpectomy (Vaccaro et al., 1998). We have previously shown that anterior cervical plating reverses the load transfer through multi-level strut-grafts and may promote pistoning of these grafts (DiAngelo et al., 2000). The design of the anterior cervical plate (ACP) may contribute to this phenomenon. The purpose of this study was to compare the graft loading mechanics of two different anterior cervical plating systems; one with a constrained plate-screw interface versus another with a semi-constrained, translational plate-screw interface.

scholarly journals Anterior Cervical Spine Fusion with ORION Anterior Cervical Plate for Dislocation-Fracture of Cervical spine.

2000 ◽  
Vol 49 (3) ◽  
pp. 787-791
Author(s):  
Koichi Adachi ◽  
Hiroaki Konishi ◽  
Shinichiro Hara ◽  
Ryoichi Takasuga ◽  
Hironori Hara ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Spine Fusion ◽  
Cervical Plate ◽  
Cervical Spine Fusion ◽  
Anterior Cervical Plate

scholarly journals Comparative study of anterior cervical discectomy and fusion by anterior cervical plate and stand-alone cervical cage

2020 ◽  
Vol 6 (5) ◽  
pp. 888
Author(s):  
Ansari Muqtadeer Abdul Aziz ◽  
Venktesh Dattatray Sonkawade ◽  
Ansari Ishtyaque Abdul Aziz ◽  
Nair Pradeepkumar Sasidharan
Keyword(s):  
Cervical Spine ◽  
Intraoperative Complications ◽  
Anterior Cervical Discectomy ◽  
Research Centre ◽  
Cervical Disc ◽  
Cervical Discectomy ◽  
Single Level ◽  
Incision Size ◽  
Cervical Plate ◽  
Anterior Cervical Plate

<p class="abstract"><strong>Background:</strong> Anterior cervical discectomy (ACD) was used for management of degenerative cervical disc disorders (DCDD) in previous days. Further research and developments in management of DCDD led to evolution of standard and widely used operative technique as anterior cervical discectomy and fusion (ACDF) by either anterior cervical plate (ACDF-ACP) with bone grafting or stand-alone cage (ACDF-SAC). There is less data available in literature regarding when and where to use ACDF-ACP and ACDF-SAC.</p><p class="abstract"><strong>Methods:</strong> The study was conducted on 20 patients operated in Government Medical College and Hospital and Pacific Hospital and Research Centre, Aurangabad from June 2018 to March 2020. These patients divided into group A - 10 patients, operated by ACDF-SAC which are further divided as group Aa - 6 patients - operated for single level ACDF-SAC and group Ab - 4 patients - operated for two level ACDF-SAC, group B - 10 patients, operated by ACDF-ACP which are further divided as group Ba - 5 patients - operated for single level ACDF-ACP and group Bb - 5 patients - operated for two level ACDF-ACP. Patients evaluated preoperatively and postoperatively using X-ray cervical spine anteroposterior (AP) and lateral views, MRI cervical spine, visual analogue scale (VAS) for pain, Robinson’s criteria and Cobb’s angle.<strong></strong></p><p class="abstract"><strong>Results:</strong> In our study we found, ACDF-SAC has small incision size, less intraoperative time, easy to carry out for surgeons, less intraoperative complications and better clinical outcome as compared to ACDF-ACP. Whereas only radiological results were better in ACDF-ACP than ACDF-SAC.</p><p class="abstract"><strong>Conclusions:</strong> ACDF-SAC is superior to ACDF-ACP for appropriately selected patients and in well experienced hands.</p>

scholarly journals Comparison of biomechanical performance of single-level triangular and quadrilateral profile anterior cervical plates

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250270
Author(s):  
Fu Cao ◽  
Rongchang Fu ◽  
Wenyuan Wang
Keyword(s):  
Cervical Spine ◽  
Functional Outcomes ◽  
Stress Ratio ◽  
Peak Stress ◽  
Element Model ◽  
Cage Subsidence ◽  
Potential Patient ◽  
Cervical Plate ◽  
The Stability ◽  
Anterior Cervical Plate

The quadrilateral anterior cervical plate (ACP) is used extensively in anterior cervical discectomy and fusion (ACDF) to reconstruct the stability of the cervical spine and prevent cage subsidence. However, there have been no comparison studies on the biomechanical performance of quadrilateral ACP and triangular ACP. The objective of this study is to investigate the functional outcomes of quadrilateral ACP and triangular ACP usage in ACDF surgery. In this study, a finite element model of intact C1-C7 segments was established and verified. Additionally, two implant systems were built; one using triangle anterior cervical plates (TACP) and another using quadrilateral orion anterior cervical plate (QACP). Both models were then compared in terms of their postoperative biomechanical performance, under normal and excessive motion. Compared to QACP, the peak stress of the TACP screws and plates occurred at 359.2 MPa and 97.2 MPa respectively and were the highest during over extension exercises. Alternately, compared to TACP, the endplate peak stress and the cage displacement of QACP were the largest at over extension, with values of 7.5 MPa and 1.2 mm, respectively. Finally, the average stress ratio of bone grafts in TACP was relatively high at 31.6%. In terms of biomechanical performance, TACP can share the load more flexibly and reduce the risks of cage subsidence and slippage but the screws have high peak stress value, thereby increasing the risk of screw slippage and fracture. This disadvantage must be considered when designing a TACP based implant for a potential patient.

scholarly journals Presbyopia Treatments by Mechanism of Action: A New Classification System Based on a Review of the Literature

2021 ◽  
Vol Volume 15 ◽  
pp. 3733-3745
Author(s):  
Daniel H Chang ◽  
George O Waring 4th ◽  
Milton Hom ◽  
Melissa Barnett
Keyword(s):  
Mechanism Of Action ◽  
Classification System ◽  
Review Of The Literature ◽  
New Classification

Biomechanical comparison of anterior cervical spine instrumentation techniques with and without supplemental posterior fusion after different corpectomy and discectomy combinations

2012 ◽  
Vol 16 (6) ◽  
pp. 579-584 ◽  
Author(s):  
Matthias Setzer ◽  
Mohamed Eleraky ◽  
Wesley M. Johnson ◽  
Kamran Aghayev ◽  
Nam D. Tran ◽  
...  
Keyword(s):  
Cervical Spine ◽  
Axial Rotation ◽  
Optical Tracking ◽  
Posterior Fixation ◽  
Titanium Cage ◽  
Cervical Corpectomy ◽  
Intact Condition ◽  
Anterior Plating ◽  
Cervical Plate ◽  
Anterior Cervical Plate

Object The objective of this study was to compare the stiffness and range of motion (ROM) of 4 cervical spine constructs and the intact condition. The 4 constructs consisted of 3-level anterior cervical discectomy with anterior plating, 1-level discectomy and 1-level corpectomy with anterior plating, 2-level corpectomy with anterior plating, and 2-level corpectomy with anterior plating and posterior fixation. Methods Eight human cadaveric fresh-frozen cervical spines from C2–T2 were used. Three-dimensional motion analysis with an optical tracking device was used to determine motion following various reconstruction methods. The specimens were tested in the following conditions: 1) intact; 2) segmental construct with discectomies at C4–5, C5–6, and C6–7, with polyetheretherketone (PEEK) interbody cage and anterior plate; 3) segmental construct with discectomy at C6–7 and corpectomy of C-5, with PEEK interbody graft at the discectomy level and a titanium cage at the corpectomy level; 4) corpectomy at C-5 and C-6, with titanium cage and an anterior cervical plate; and 5) corpectomy at C-5 and C-6, with titanium cage and an anterior cervical plate, and posterior lateral mass screw-rod system from C-4 to C-7. All specimens underwent a pure moment application of 2 Nm with regards to flexion-extension, lateral bending, and axial rotation. Results In all tested motions the statistical comparison was significant between the intact condition and the 2-level corpectomy with anterior plating and posterior fixation construct. All other statistical comparisons between the instrumented constructs were not statistically significant except between the 3-level discectomy with anterior plating and the 2-level corpectomy with anterior plating in axial rotation. There were no statistically significant differences between the 1-level discectomy and 1-level corpectomy with anterior plating and the 2-level corpectomy with anterior plating in any tested motion. There was also no statistical significance between the 3-level discectomy with anterior plating and the 2-level corpectomy with anterior plating and posterior fixation. Conclusions This study demonstrates that segmental plate fixation (3-level discectomy) affords the same stiffness and ROM as circumferential fusion in 2-level cervical spine corpectomy in the immediate postoperative setting. This obviates the need for staged circumferential procedures for multilevel cervical spondylotic myelopathy. Given that the posterior segmental instrumentation confers significant stability to a multilevel cervical corpectomy, the surgeon should strongly consider the placement of segmental posterior instrumentation to significantly improve the overall stability of the fusion construct after a 2-level cervical corpectomy.

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