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Liu X, Gao J, Wu X, Deng J, Li Z, Li R, Zhang L, Liu J, Li M. Comparison between Novel Anatomical Locking Guide Plate and Conventional Locking Plate for Acetabular Fractures: A Finite Element Analysis. Life (Basel) 2023; 13:2108. [PMID: 38004248 PMCID: PMC10671966 DOI: 10.3390/life13112108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/15/2023] [Accepted: 10/22/2023] [Indexed: 11/26/2023] Open
Abstract
The treatment of complex acetabular fractures remains a complicated clinical challenge. Our self-designed novel anatomical locking guide plate (NALGP) has previously shown promising potential in T-shaped acetabular fractures (TAF), but a direct comparison with conventional fixations is yet to be made. The TAF model was established based on a volunteer's computer tomography data and then fixed with double column locking plates (DLP), a posterior column locking plate with anterior column screws (LPACS), and our NALGP. Forces of 200 N, 400 N, and 600 N were then loaded on the model vertically downward, respectively. The stress distribution and peaks and maximum displacements at three sites were assessed. We found that the stress area of all three plates was mainly concentrated around the fracture line, while only the matching screws of the NALGP showed no obvious stress concentration points. In addition, the NALGP and DLP showed significantly less fracture fragment displacement than the LPACS at the three main fracture sites. The NALGP was found to have less displacement than DLP at the posterior column and ischiopubic branch sites, especially under the higher loading forces of 400 N and 600 N. The fixation stability of the NALGP for TAF was similar to that of DLP but better than that of LPACS. Moreover, the NALGP and its matching screws have a more reasonable stress distribution under different loads of force and the same strength as the LPACS.
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Affiliation(s)
- Xiao Liu
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Jianpeng Gao
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Xiaoyong Wu
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Junhao Deng
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Zijian Li
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Ran Li
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Licheng Zhang
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Jianheng Liu
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
| | - Ming Li
- Department of Orthopaedics, The First Medical Center of the Chinese PLA General Hospital, No. 28 Fuxin Road, Beijing 100853, China; (X.L.); (J.G.); (X.W.); (J.D.); (Z.L.); (R.L.); (L.Z.)
- National Clinical Research Center for Orthopedics, Sports Medicine & Rehabilitation, No. 28 Fuxin Road, Beijing 100853, China
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Effect of a Compound Energy Field with Temperature and Ultrasonic Vibration on the Material Properties and Bending Process of TC2 Titanium Alloy. MATERIALS 2021; 14:ma14237192. [PMID: 34885346 PMCID: PMC8658285 DOI: 10.3390/ma14237192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 11/25/2022]
Abstract
Due to the low formability and forming quality of titanium alloy, the forming process of a compound energy field (CEF) with temperature and ultrasonic vibration was proposed. Tensile tests were carried out to investigate the effect of the CEF on the true stress–strain curve, yield strength, elastic modulus, and other mechanical properties of the TC2 titanium alloy. Bending tests assisted by CEF were also performed to investigate the effect of different parameters of the CEF on bending force, spring-back, bending fillet radius, and microstructure of TC2 titanium. The results demonstrate that compared to the process under a single-temperature field, the CEF can reduce yield strength, elastic modulus, bending force, bending fillet, and the spring-back angle, which shows that the CEF can further increase the high-temperature softening effect of TC2 titanium. Furthermore, this effect becomes more remarkable when ultrasonic vibration energy increases. As a result, the formability of titanium alloy can be improved.
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In Situ Observation of the Tensile Deformation and Fracture Behavior of Ti-5Al-5Mo-5V-1Cr-1Fe Alloy with Different Microstructures. MATERIALS 2021; 14:ma14195794. [PMID: 34640195 PMCID: PMC8510079 DOI: 10.3390/ma14195794] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 09/17/2021] [Accepted: 09/29/2021] [Indexed: 11/17/2022]
Abstract
The plastic deformation processes and fracture behavior of a Ti-5Al-5Mo-5V-1Cr-1Fe alloy with bimodal and lamellar microstructures were studied by room-temperature tensile tests with in situ scanning electron microscopy (SEM) observations. The results indicate that a bimodal microstructure has a lower strength but higher ductility than a lamellar microstructure. For the bimodal microstructure, parallel, deep slip bands (SBs) are first noticed in the primary α (αp) phase lying at an angle of about 45° to the direction of the applied tension, while they are first observed in the coarse lath α (αL) phase or its interface at grain boundaries (GBs) for the lamellar microstructure. The β matrix undergoes larger plastic deformation than the αL phase in the bimodal microstructure before fracture. Microcracks are prone to nucleate at the αp/β interface and interconnect, finally causing the fracture of the bimodal microstructure. The plastic deformation is mainly restricted to within the coarse αL phase at GBs, which promotes the formation of microcracks and the intergranular fracture of the lamellar microstructure.
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Deng J, Li M, Li J, Li Z, Meng F, Zhou Y, Tang P, Zhao Y, Zhang L. Finite Element Analysis of a Novel Anatomical Locking Guide Plate for Anterior Column and Posterior Hemi-Transverse Acetabular Fractures. J Med Biol Eng 2021. [DOI: 10.1007/s40846-021-00655-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
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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Zhang D, Chen Y, Zhang G, Liu N, Kong F, Tian J, Sun J. Hot Deformation Behavior and Microstructural Evolution of PM Ti43Al9V0.3Y with Fine Equiaxed γ and B2 Grain Microstructure. MATERIALS 2020; 13:ma13040896. [PMID: 32079325 PMCID: PMC7078910 DOI: 10.3390/ma13040896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 11/25/2022]
Abstract
The hot deformation behavior and microstructure evolution of powder metallurgy (PM) Ti43Al9V0.3Y alloy with fine equiaxed γ and B2 grains were investigated using uniaxial hot compression. Its stress exponent and activation energy were 2.78 and 295.86 kJ/mol, respectively. The efficiency of power dissipation and instability parameters were evaluated, and processing maps at 50% and 80% strains were developed. It is demonstrated that the microstructure evolution was dependent on the temperature, strain, and strain rate. Both temperature and strain increases led to a decrease in the γ phase. Moreover, dynamic recrystallization (DRX) and grain boundary slip both played important roles in deformation. Reasonable parameters for secondary hot working included temperatures above 1100 °C but below 1200 °C with a strain rate of less than 1 s−1 at 80% strain. Suitable hot working parameters at 50% strain were 1150–1200 °C/≤1 s−1 and 1000–1200 °C/≤0.05 s−1.
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Affiliation(s)
- Dongdong Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; (D.Z.); (F.K.); (J.T.)
| | - Yuyong Chen
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; (D.Z.); (F.K.); (J.T.)
- College Vanadium and Titanium, Panzhihua University, Panzhihua 617000, China
- Correspondence: (Y.C.); (J.S.)
| | - Guoqing Zhang
- Beijing Institute of Aeronautical Materials, Beijing 100095, China; (G.Z.); (N.L.)
| | - Na Liu
- Beijing Institute of Aeronautical Materials, Beijing 100095, China; (G.Z.); (N.L.)
| | - Fantao Kong
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; (D.Z.); (F.K.); (J.T.)
| | - Jing Tian
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; (D.Z.); (F.K.); (J.T.)
| | - Jianfei Sun
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China; (D.Z.); (F.K.); (J.T.)
- Correspondence: (Y.C.); (J.S.)
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