The Transmission of Stress to Grafted Bone Inside a Titanium Mesh Cage Used in Anterior Column Reconstruction After Total Spondylectomy: A Finite-Element Analysis

Spine ◽  
2005 ◽  
Vol 30 (24) ◽  
pp. 2783-2787 ◽  
Author(s):  
Tomoyuki Akamaru ◽  
Norio Kawahara ◽  
Jiro Sakamoto ◽  
Akira Yoshida ◽  
Hideki Murakami ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Anterior Column ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
Element Analysis ◽  
Mesh Cage ◽  
Anterior Column Reconstruction

scholarly journals A novel anatomic titanium mesh cage for reducing the subsidence rate after anterior cervical corpectomy: a finite element study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuhang Wang ◽  
Yi Zhan ◽  
Huiming Yang ◽  
Hua Guo ◽  
Haiping Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
Element Analysis ◽  
Cervical Corpectomy ◽  
Subsidence Rate ◽  
Anterior Corpectomy ◽  
Mesh Cage ◽  
Anterior Cervical Corpectomy

AbstractFusion with a titanium mesh cage (TMC) has become popular as a conventional method after cervical anterior corpectomy, but postoperative TMC subsidence has often been reported in the literature. We designed a novel anatomic cervical TMC to reduce the postoperative subsidence rate. According to the test process specified in the American Society of Testing Materials (ASTM) F2267 standard, three-dimensional finite element analysis was used to compare the anti-subsidence characteristics of a traditional TMC (TTMC) and novel TMC (NTMC). Through analysis, the relative propensity values of a device to subside (Kp) of the TTMC and NTMC were 665.5 N/mm and 1007.2 N/mm, respectively. A higher Kp measurement is generally expected to indicate that the device is more resistant to subsidence into a vertebral body. The results showed that the novel anatomic titanium mesh cage (NTMC) significantly improved the anti-subsidence performance after anterior cervical corpectomy and fusion (ACCF), which was approximately 51.3% higher than that of the traditional titanium mesh cage.

scholarly journals A novel anatomic titanium mesh cage for reducing the subsidence rate after anterior cervical corpectomy: a finite element study

2021 ◽  
Author(s):  
Yuhang Wang ◽  
Huiming Yang ◽  
Hua Guo ◽  
Haiping Zhang ◽  
Qinpeng Zhao ◽  
...  
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
Element Analysis ◽  
Cervical Corpectomy ◽  
Subsidence Rate ◽  
Anterior Corpectomy ◽  
Mesh Cage ◽  
Anterior Cervical Corpectomy

Abstract Fusion with a titanium mesh cage (TMC) has become popular as a conventional method after cervical anterior corpectomy, but postoperative TMC subsidence has often been reported in the literature. We designed a novel anatomic cervical TMC to reduce the postoperative subsidence rate. According to the test process specified in the American Society of Testing Materials (ASTM) F2267 standard, three-dimensional finite element analysis was used to compare the anti-subsidence characteristics of a traditional TMC (TTMC) and novel TMC (NTMC). Through analysis, The relative propensity values of a device to subside (Kp) of the TTMC and NTMC were be 665.5 N/mm and 1007.2 N/mm, respectively. A higher Kp measurement is generally expected to indicate that the device is more resistant to subsidence into a vertebral body. The results showed that the novel anatomic titanium mesh cage (NTMC) significantly improved the anti-subsidence performance after anterior cervical corpectomy and fusion (ACCF), which was approximately 51.3% higher than that of the traditional titanium mesh cage.

Healing of Autologous Bone in a Titanium Mesh Cage Used in Anterior Column Reconstruction After Total Spondylectomy

Spine ◽  
2002 ◽  
Vol 27 (13) ◽  
pp. E329-E333 ◽  
Author(s):  
Tomoyuki Akamaru ◽  
Norio Kawahara ◽  
Hiroyuki Tsuchiya ◽  
Tadayoshi Kobayashi ◽  
Hideki Murakami ◽  
...  
Keyword(s):  
Anterior Column ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
Mesh Cage ◽  
Autologous Bone ◽  
Anterior Column Reconstruction

scholarly journals A Novel Anatomic Titanium Mesh Cage for Reducing the Subsidence Rate After Anterior Cervical Corpectomy: A Finite Element Study

2020 ◽  
Author(s):  
Yuhang Wang ◽  
Haiping Zhang ◽  
Qinpeng Zhao ◽  
Yongyuan Zhang ◽  
Honghui Sun ◽  
...  
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
Finite Element Study ◽  
Subsidence Rate ◽  
Dimensional Finite Element ◽  
Mesh Cage ◽  
Three Dimensional Finite Element ◽  
Element Study

Abstract Background: Fusion with a titanium mesh cage (TMC) has become popular as a conventional method after cervical anterior corpectomy, but postoperative TMC subsidence has often been reported in the literature. We designed a novel anatomic cervical TMC to reduce the postoperative subsidence rate. This finite element study aims to investigate the anti-subsidence performance of a novel anatomic TMC and provide a theoretical basis for clinical application. Methods: According to the test process specified in the ASTM F2267 standard, three-dimensional finite element analysis was used to compare the anti-subsidence characteristics of a traditional TMC (TTMC) and novel TMC (NTMC). Abaqus software was used for the mesh, and the modulus of elasticity, Poisson's ratio and other material coefficients of each part were input into the model. Solidworks software was used to establish the TTMC and NTMC models and construct the two three-dimensional finite element models of TMC subsidence testing mentioned above. Through analysis, the relationships between the stiffness of the intervertebral body fusion device (Kd) and the stiffness of the polyurethane foam blocks (Ks) of the TTMC and NTMC were derived, respectively. Results: After fitting the linear segment, the Kd values of the TTMC and NTMC were 37314 N/mm and 89124 N/mm, respectively. After calculation, the Ks values of the TTMC and NTMC were 653.83 N/mm and 995.95 N/mm, respectively. The Kp values of the TTMC and NTMC were calculated to be 665.5 N/mm and 1007.2 N/mm according to the formula. Conclusion: The reported novel anatomic titanium mesh cage (NTMC) significantly improved the anti-subsidence performance after ACCF, which was approximately 51.3% higher than that of the traditional titanium mesh cage.

scholarly journals The most appropriate titanium mesh cage size for anterior spinal reconstruction after single-level lumbar total en bloc spondylectomy: a finite element analysis and cadaveric validation study

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Permsak Paholpak ◽  
Winai Sirichativapee ◽  
Taweechok Wisanuyotin ◽  
Weerachai Kosuwon ◽  
Yuichi Kasai ◽  
...  
Keyword(s):  
Finite Element ◽  
Validation Study ◽  
Maximum Stress ◽  
Element Model ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
En Bloc ◽  
Total En Bloc Spondylectomy ◽  
Bloc Spondylectomy ◽  
Mesh Cage

Abstract Purpose There is little information available regarding the cage diameter that can provide the most rigid construct reconstruction after total en bloc spondylectomy (TES). The aim of this study was thus to determine the most appropriate titanium mesh cage diameter for reconstruction after spondylectomy. Methods A finite element model of the single level lumbar TES was created. Six models of titanium mesh cage with diameters of 1/3, 1/2, 2/3, 3/4, 4/5 of the caudad adjacent vertebra, and 1/1 of the cephalad vertebra were tested for construct stiffness. The peak von Mises stress (MPa) at the failure point and the site of failure were measured as outcomes. A cadaveric validation study also conducted to validate the finite element model. Results For axial loading, the maximum stress points were at the titanium mesh cage, with maximum stress of 44,598 MPa, 23,505 MPa, 23,778 MPa, and 16,598 MPa, 10,172 MPa, 10,805 MPa in the 1/3, 1/2, 2/3, 3/4, 4/5, and 1/1 diameter model, respectively. For torsional load, the maximum stress point in each of the cages was identified at the rod area of the spondylectomy site, with maximum stress of 390.9 MPa (failed at 4459 cycles), 141.35 MPa, 70.098 MPa, and 88.972 MPa, 42.249 MPa, 15.827 MPa, respectively. A cadaveric validation study results were coincided with the finite element model results. Conclusion The most appropriate mesh cage diameter for reconstruction is 1/1 the diameter of the lower endplate of the adjacent cephalad vertebra, due to its ability to withstand both axial and torsional stress. According to the difficulty of large size cage insertion, a cage diameter of more than half of the upper endplate of the caudad vertebrae is acceptable in term of withstand stress. A cage diameter of 1/3 is unacceptable for reconstruction after total en bloc spondylectomy.

scholarly journals A Novel Anatomic Titanium Mesh Cage for Reducing the Subsidence Rate After Anterior Cervical Corpectomy: A Finite Element Study

2020 ◽  
Author(s):  
Yuhang Wang ◽  
Haiping Zhang ◽  
Qinpeng Zhao ◽  
Yongyuan Zhang ◽  
Honghui Sun ◽  
...  
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Titanium Mesh ◽  
Titanium Mesh Cage ◽  
Finite Element Study ◽  
Subsidence Rate ◽  
Dimensional Finite Element ◽  
Mesh Cage ◽  
Three Dimensional Finite Element ◽  
Element Study

Abstract Background: Fusion with a titanium mesh cage (TMC) has become popular as a conventional method after cervical anterior corpectomy, but postoperative TMC subsidence has often been reported in the literature. We designed a novel anatomic cervical TMC to reduce the postoperative subsidence rate. This finite element study aims to investigate the anti-subsidence performance of a novel anatomic TMC and provide a theoretical basis for clinical application. Methods: According to the test process specified in the ASTM F2267 standard, three-dimensional finite element analysis was used to compare the anti-subsidence characteristics of a traditional TMC (TTMC) and novel TMC (NTMC). Abaqus software was used for the mesh, and the modulus of elasticity, Poisson's ratio and other material coefficients of each part were input into the model. Solidworks software was used to establish the TTMC and NTMC models and construct the two three-dimensional finite element models of TMC subsidence testing mentioned above. Through analysis, the relationships between the stiffness of the intervertebral body fusion device (Kd) and the stiffness of the polyurethane foam blocks (Ks) of the TTMC and NTMC were derived, respectively. Results: After fitting the linear segment, the Kd values of the TTMC and NTMC were 37314 N/mm and 89124 N/mm, respectively. After calculation, the Ks values of the TTMC and NTMC were 653.83 N/mm and 995.95 N/mm, respectively. The Kp values of the TTMC and NTMC were calculated to be 665.5 N/mm and 1007.2 N/mm according to the formula. Conclusion: The reported novel anatomic titanium mesh cage (NTMC) significantly improved the anti-subsidence performance after ACCF, which was approximately 51.3% higher than that of the traditional titanium mesh cage.

scholarly journals Finite Element Analysis of a Novel Anatomical Locking Guide Plate for Anterior Column and Posterior Hemi-Transverse Acetabular Fractures

2021 ◽  
Author(s):  
Junhao Deng ◽  
Ming Li ◽  
Jiantao Li ◽  
Zhirui Li ◽  
Fanqi Meng ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Locking Plate ◽  
Fracture Line ◽  
Anterior Column ◽  
Acetabular Fractures ◽  
Vertical Force ◽  
Element Analysis ◽  
Guide Plate ◽  
Ct Data

Abstract Purpose The increasing worldwide prevalence of anterior column-posterior hemi-transverse fracture (ACPHTF) brings formidable challenges to orthopaedic surgeons. Our newly-designed locking plate had previously demonstrated promising effects in ACPHTF, but evidence of their direct comparison with conventional internal fixations remains lacking. In this study, we aimed to compare our novel plate with the traditional devices via finite element analysis. Methods The ACPHTF model was created based on a 48-year-old volunteer’s CT data, and then fixed in three different internal fixations: an anterior column locking plate with posterior column screws, double column locking plates, and our novel anatomical locking plate. These models were next loaded with a downward vertical force of 200 N, 400 N and 600 N, and the stress peaks and displacements of three different sites were recorded and analyzed. Results We first tested the rigidity and found that our newly-designed locking plate as well as its matched screws had a greater stiffness especially when they were under a higher loading force of 600 N. Then we evaluated the displacements of fracture ends after applying these fixations. Both our novel plate and DLP showed significantly smaller displacement than LPPCS at the anterior column fracture line and the pubic branch fracture line, while our novel plate was not obviously inferior to DLP in terms of the displacement. Conclusion This novel plate demonstrates a distinct superiority in the stiffness over LPPCS and DLP and comparable displacements to DLP in ACPHTF, which suggests this novel anatomical locking guide plate should be taken into consideration in ACPHTF.

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