scholarly journals A finite element analysis on comparing the stability of different posterior fixation methods for thoracic total en bloc spondylectomy

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Yun Liang ◽  
Yuanwu Cao ◽  
Zhiguo Gong ◽  
Chang Jiang ◽  
Lixia Jin ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Posterior Fixation ◽  
En Bloc ◽  
Element Analysis ◽  
Total En Bloc Spondylectomy ◽  
Fixation Methods ◽  
En Bloc Spondylectomy ◽  
Bloc Spondylectomy ◽  
The Stability

scholarly journals Biomechanics of artificial pedicle fixation in a 3D-printed prosthesis after total en bloc spondylectomy: a finite element analysis

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Xiaodong Wang ◽  
Hanpeng Xu ◽  
Ye Han ◽  
Jincheng Wu ◽  
Yang Song ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Posterior Fixation ◽  
En Bloc ◽  
Element Analysis ◽  
Total En Bloc Spondylectomy ◽  
En Bloc Spondylectomy ◽  
Pedicle Fixation ◽  
Bloc Spondylectomy ◽  
3D Printed

Abstract Background This study compared the biomechanics of artificial pedicle fixation in spine reconstruction with a 3-dimensional (3D)-printed prosthesis after total en bloc spondylectomy (TES) by finite element analysis. Methods A thoracolumbar (T10–L2) finite element model was developed and validated. Two models of T12 TES were established in combination with different fixation methods: Model A consisted of long-segment posterior fixation (T10/11, L1/2) + 3D-printed prosthesis; and Model B consisted of Model A + two artificial pedicle fixation screws. The models were evaluated with an applied of 7.5 N·m and axial force of 200 N. We recorded and analyzed the following: (1) stiffness of the two fixation systems, (2) hardware stress in the two fixation systems, and (3) stress on the endplate adjacent to the 3D-printed prosthesis. Results The fixation strength of Model B was enhanced by the screws in the artificial pedicle, which was mainly manifested as an improvement in rotational stability. The stress transmission of the artificial pedicle fixation screws reduced the stress on the posterior rods and endplate adjacent to the 3D-printed prosthesis in all directions of motion, especially in rotation. Conclusions After TES, the posterior long-segment fixation combined with the anterior 3D printed prosthesis could maintain postoperative spinal stability, but adding artificial pedicle fixation increased the stability of the fixation system and reduced the risk of prosthesis subsidence and instrumentation failure.

scholarly journals Biomechanics of artificial pedicle fixation in a 3D-printed prosthesis after total en bloc spondylectomy: A finite element analysis

2021 ◽  
Author(s):  
Xiaodong Wang ◽  
Hanpeng Xu ◽  
Ye Han ◽  
Jincheng Wu ◽  
Yang Song ◽  
...  
Keyword(s):  
Finite Element ◽  
Rotational Stability ◽  
Fixation Strength ◽  
Posterior Fixation ◽  
En Bloc ◽  
Total En Bloc Spondylectomy ◽  
En Bloc Spondylectomy ◽  
Pedicle Fixation ◽  
Bloc Spondylectomy ◽  
3D Printed

Abstract Background: This study compared the biomechanics of artificial pedicle fixation in spine reconstruction with a 3-dimensional (3D)-printed prosthesis after total en bloc spondylectomy (TES) by finite element analysis.Methods: A thoracolumbar (T10–L2) finite element model was developed and validated. Two models of T12 TES were established in combination with different fixation methods: Model A consisted of long-segment posterior fixation (T10/11, L1/2) + 3D-printed prosthesis; and Model B consisted of Model A + two artificial pedicle fixation screws. The models were evaluated with an applied of 7.5 N·m and axial force of 200 N. We recorded and analyzed the following: 1) stiffness of the two fixation systems; 2) hardware stress in the two fixation systems; and 3) stress on the endplate adjacent to the 3D-printed prosthesis.Results: The fixation strength of Model B was enhanced by the screws in the artificial pedicle, which was mainly manifested as an improvement in rotational stability. The stress transmission of the artificial pedicle fixation screws reduced the stress on the posterior rods and endplate adjacent to the 3D-printed prosthesis in all directions of motion, especially in rotation.Conclusions: After TES, the posterior long-segment fixation combined with the anterior 3D printed prosthesis could maintain postoperative spinal stability, but adding artificial pedicle fixation increased the stability of the fixation system and reduced the risk of prosthesis subsidence and instrumentation failure.

scholarly journals Biomechanics of Artificial Pedicle Fixation in a 3d-printed Prosthesis After Total en Bloc Spondylectomy: A Finite Element Analysis

2020 ◽  
Author(s):  
Xiao Dong Wang ◽  
Xu Hanpeng ◽  
Ye Han ◽  
Jincheng Wu ◽  
Yang Song ◽  
...  
Keyword(s):  
Finite Element ◽  
Rotational Stability ◽  
Fixation Strength ◽  
Posterior Fixation ◽  
En Bloc ◽  
Total En Bloc Spondylectomy ◽  
En Bloc Spondylectomy ◽  
Pedicle Fixation ◽  
Bloc Spondylectomy ◽  
3D Printed

Abstract Background: This study compared the biomechanics of artificial pedicle fixation in spine reconstruction with a 3-dimensional (3D)-printed prosthesis after total en bloc spondylectomy (TES) by finite element analysis.Methods: A thoracolumbar (T10–L2) finite element model was developed and validated. Two models of T12 TES were established in combination with different fixation methods: Model A consisted of long-segment posterior fixation (T10/11, L1/2) + 3D-printed prosthesis; and Model B consisted of Model A + two artificial pedicle fixation screws. The models were evaluated with an applied of 7.5 N·m and axial force of 200 N. We recorded and analyzed the following: 1) stiffness of the two fixation systems; 2) hardware stress in the two fixation systems; and 3) stress on the endplate adjacent to the 3D-printed prosthesis.Results: The fixation strength of Model B was enhanced by the screws in the artificial pedicle, which was mainly manifested as an improvement in rotational stability. The stress transmission of the artificial pedicle fixation screws reduced the stress on the posterior rods and endplate adjacent to the 3D-printed prosthesis in all directions of motion, especially in rotation.Conclusions: After TES, the posterior long-segment fixation combined with the anterior 3D printed prosthesis could maintain postoperative spinal stability, but adding artificial pedicle fixation increased the stability of the fixation system and reduced the risk of prosthesis subsidence and instrumentation failure.

FINITE ELEMENT ANALYSIS OF A DENTAL IMPLANT

2003 ◽  
Vol 15 (02) ◽  
pp. 82-85 ◽  
Author(s):  
SHYH-CHOUR HUANG ◽  
CHANG-FENG TSAI
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Element Model ◽  
Element Analysis ◽  
3 Dimensional ◽  
Dimensional Finite Element ◽  
The Stability ◽  
Stress Concentration Effect ◽  
Implant System

This paper presents results from using a 3-dimensional finite element model to assess the stress distribution in the bone, in the implant and in the abutment as a function of the implant's diameter and length. Increasing implant diameter and length increases the stability of the implant system. By using a finite element analysis, we show that implant length does not decrease the stress distribution of either the implant or the bone. Alternatively, however implant diameter increases reduce the stresses. For the latter case, the contact area between implant and bone is increased thus the stress concentration effect is decreased. Also, with increased implant diameter the bone loss is decreased and as a consequence the success rate is improved.

scholarly journals A Study of Mechanical Evaluation of Reconstruction Method After Total en Bloc Spondylectomy.

2003 ◽  
Vol 69 (677) ◽  
pp. 128-134
Author(s):  
Jiro SAKAMOTO ◽  
Juhachi ODA ◽  
Atsushi KAKUUCHI ◽  
Tomoyuki AKAMARU ◽  
Norio KAWAHARA ◽  
...  
Keyword(s):  
Reconstruction Method ◽  
En Bloc ◽  
Total En Bloc Spondylectomy ◽  
En Bloc Spondylectomy ◽  
Bloc Spondylectomy
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