Titanium intervertebral disc and instrumentation for fusion in anterior cervical discectomy. Technical note

1995 ◽  
Vol 18 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Bertram Kaden ◽  
Johannes Schramm ◽  
Gerhard Fuhrmann ◽  
Chris H. Hoffmann
Keyword(s):  
Intervertebral Disc ◽  
Technical Note ◽  
Anterior Cervical Discectomy ◽  
Cervical Discectomy

scholarly journals Biomechanical Effect of Plate-to-Disc Distance on Surgical and Adjacent Segment in C5/C6 Anterior Cervical Discectomy and Fusion - A Finite Element Analysis

2020 ◽  
Author(s):  
Yuan Xue ◽  
Xing Guo ◽  
Jiaming Zhou ◽  
Yueyang Tian ◽  
Liang Kang
Keyword(s):  
Finite Element ◽  
Intervertebral Disc ◽  
Bone Graft ◽  
Anterior Cervical Discectomy ◽  
Von Mises Stress ◽  
Adjacent Segment ◽  
Titanium Plate ◽  
Cervical Discectomy ◽  
Cage Subsidence ◽  
Biomechanical Effect

Abstract Background: The PDD is an important factor affecting the degeneration of adjacent segments after ACDF. However, the most suitable PDD is controversial. This study examined the adjacent intervertebral disc stress, bone graft stress, titanium plate stress and screw stress to evaluate the biomechanical effect of different Plate-to-Disc Distance (PDD) on surgical segment and adjacent segment following C5/C6 anterior cervical discectomy and fusion (ACDF). Methods: We constructed 10 preoperative finite element models (FEM) of intact C4–C7 segments and validated them in the present study. We simulated ACDF surgery based on the 10 intact models in software. We designed three different distance of Plate-to-Disc titanium plates: L, long PDD (10 mm); S, short PDD (0 mm); and N, PDD (5 mm). The changes in C4/C5 and C6/C7 intervertebral disc stress, bone graft stress, titanium plate stress and screw stress were analyzed.Results: The von Mises stress of C4/C5 and C6/C7 intervertebral discs have no significant differences (P>0.05) in three different PDD groups. Titanium plate stress increased as the PDD decreased. The bone graft stress and screws stress decreased as the PDD decreased. The maximum stress of each part occurred was mostly in the conditions of rotation and lateral bending. Conclusions: The PDD has no effect on adjacent intervertebral disc stress, but it is an important factor that affecting the bone graft stress, titanium plate stress and screws stress after ACDF. Shorter PDD plate can provide better stability to reduce stress on screws and bone graft, that may be helpful to prevent cage subsidence, pseudarthrosis and instrument failure. This can serve as a reference for clinical choice of plate.

Use of Acrylic in Anterior Cervical Discectomy: Technical Note

Neurosurgery ◽  
1985 ◽  
Vol 17 (1) ◽  
pp. 94-96 ◽  
Author(s):  
Saeid Alemo-Hammad
Keyword(s):  
Bone Grafts ◽  
Technical Note ◽  
Anterior Cervical Discectomy ◽  
Intervertebral Space ◽  
Cervical Discectomy

Abstract Acrylic was inserted into the intervertebral space after anterior cervical discectomy in five patients. The application of the acrylic was simple and quick to perform and atraumatic to the patient. The intervertebral space was preserved satisfactorily and consistently in all five patients. With this technique, the complications associated with bone grafts can be avoided. (Neurosurgery 17:94-96, 1985)

An incomplete paraplegia following the dislocation of an artificial cervical total disc replacement

2013 ◽  
Vol 18 (3) ◽  
pp. 255-259 ◽  
Author(s):  
Lennart Viezens ◽  
Christian Schaefer ◽  
Jörg Beyerlein ◽  
Roland Thietje ◽  
Nils Hansen-Algenstaedt
Keyword(s):  
Spinal Cord ◽  
Intervertebral Disc ◽  
Gold Standard ◽  
Spinal Canal ◽  
Total Disc Replacement ◽  
Anterior Cervical Discectomy ◽  
Disc Replacement ◽  
Cervical Total Disc Replacement ◽  
Cervical Discectomy ◽  
Applied Method

Replacement of the cervical intervertebral disc by artificial implants, known as cervical total disc replacement (CTDR), is becoming a generally applied method instead of using the gold standard of the anterior cervical discectomy and fusion. Hypothetically, the preserved mobility results in the protection of the neighboring segments. There is growing evidence that results in patients who underwent CTDR were not inferior when compared to results in patients who underwent anterior cervical discectomy and fusion. The authors report a case of a healthy 53-year-old man who suffered an incomplete paraplegia below C-6 following the dislocation of an artificial CTDR device into the spinal canal with consequent compression of the spinal cord.

Femoral Ring Allograft for Anterior Cervical Interbody Fusion: Technical Note

Neurosurgery ◽  
2000 ◽  
Vol 47 (6) ◽  
pp. 1457-1459 ◽  
Author(s):  
Scott Shapiro ◽  
Raj Bindal
Keyword(s):  
Demineralized Bone Matrix ◽  
Bone Matrix ◽  
Operating Time ◽  
Fusion Rate ◽  
Technical Note ◽  
Anterior Cervical Discectomy ◽  
Long Term Results ◽  
Cervical Discectomy ◽  
Femoral Ring

ABSTRACT OBJECTIVE Cadaveric fibula with locking plate internal fixation has been reported to be associated with fewer complications and better long-term results, compared with autologous iliac crest. With the knowledge that cortically dense allografts collapse less with time, new machined femoral ring allografts were developed for anterior cervical fusion after anterior cervical discectomy. We describe the system and the technique for placement. METHODS The femoral ring allograft set consists of color-coded graft-sizers that correspond precisely to the size of the precut grafts. The purple set is primarily intended for petite cervical vertebral bodies; the purple sizers and grafts are 11 mm wide and 11 mm deep and vary in height from 5 to 9 mm. The green sizers and grafts are 14 mm wide and 11 mm deep and vary in height from 5 to 11 mm. The blue sizers and grafts are 14 mm wide and 14 mm deep and vary in height from 5 to 11 mm. The rostral and caudal faces of the grafts are corrugated, to improve their holding capacity in the interspace. The bone is sterilely packaged in vacuum-sealed bottles, the tops of which are color-coded and precisely labeled. The set also includes a graft holder (to facilitate insertion into the interspace), impactors, and a barrel-shaped cutting burr (to prepare the endplates for fusion). RESULTS After anterior cervical discectomy to treat spondylotic radiculopathy or myelopathy, a femoral ring allograft was inserted, with allogeneic demineralized bone matrix and a locking cervical plate, in 20 cases, with no complications. Use of the system decreased the operating time by an average of 10 to 15 minutes. CONCLUSION The femoral ring allograft system is easy to use, and there have been no complications to date. The long-term fusion rate remains to be determined.

scholarly journals Biomechanical effect of different plate-to-disc distance on surgical and adjacent segment in anterior cervical discectomy and fusion - a finite element analysis

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Xing Guo ◽  
Jiaming Zhou ◽  
Yueyang Tian ◽  
Liang Kang ◽  
Yuan Xue
Keyword(s):  
Finite Element ◽  
Intervertebral Disc ◽  
Bone Graft ◽  
Anterior Cervical Discectomy ◽  
Von Mises Stress ◽  
Adjacent Segment ◽  
Titanium Plate ◽  
Cervical Discectomy ◽  
Cage Subsidence ◽  
Biomechanical Effect

Abstract Background The plate-to-disc distance (PDD) is an important factor affecting the degeneration of adjacent segments after anterior cervical discectomy and fusion (ACDF). However, the most suitable PDD is controversial. This study examined the adjacent intervertebral disc stress, bone graft stress, titanium plate stress and screw stress to evaluate the biomechanical effect of different PDD on surgical segment and adjacent segment following C5/C6 ACDF. Methods We constructed 10 preoperative finite element models of intact C4–C7 segments and validated them in the present study. We simulated ACDF surgery based on the 10 intact models in software. We designed three different distance of plate-to-disc titanium plates: long PDD (10 mm), medium PDD (5 mm) and short PDD (0 mm). The changes in C4/C5 and C6/C7 intervertebral disc stress, bone graft stress, titanium plate stress and screw stress were analyzed. Results The von Mises stress of C4/C5 and C6/C7 intervertebral discs had no significant differences (P > 0.05) in three different PDD groups. Titanium plate stress increased as the PDD decreased. The bone graft stress and screws stress decreased as the PDD decreased. The maximum stress of each part occurred was mostly in the conditions of rotation and lateral bending. Conclusions The PDD has no effect on adjacent intervertebral disc stress, but it is an important factor that affecting the bone graft stress, titanium plate stress and screws stress after ACDF. Shorter PDD plate can provide better stability to reduce stress on screws and bone graft, which may be helpful to prevent cage subsidence, pseudarthrosis and instrument failure. This can serve as a reference for clinical choice of plate.

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