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Li Y, Li H, Lai Q, Xue R, Zhu K, Deng Y. Finite element analysis of 3D-printed personalized titanium plates for mandibular angle fracture. Comput Methods Biomech Biomed Engin 2023; 26:78-89. [PMID: 35587215 DOI: 10.1080/10255842.2022.2047952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This paper discussed the size of 3 D-printed personalized titanium plates that can gain maximum stability of mandibular fracture and minimize stress shielding through finite element analysis. A 3 D virtual model of mandible with mandibular angle fracture was created from the CT data of patient. 3 D-printed personalized titanium plates varying in length and thickness were designed, and finite element analysis was performed under different loading conditions and fracture healing periods. After that, the stress distribution and deformation of the mandible with gonial fracture could be observed, and the stress shielding rate could be obtained. Finally, SPSS21.0 was used for statistical analysis. The results of finite element analysis indicated that as the thickness of titanium plates and the healing time decreased, the maximum displacement increased, under a certain condition in which the pore size, the width, the hole distance and the bridge spacing were 2.0 mm, 4.0 mm, 6.0 mm, 12.0 mm, respectively. What's more, in this condition, the thicker the titanium plate and the shorter the healing time were, the higher the stress shielding was at central occlusion. When the thickness of the personalized 3 D-printed titanium plate was 1.0 mm, the maximum displacement tended to be stable and the stress shielding was minimized. It can not only improve the bone stability after tension band fixation, but also minimize the stress shielding, which is expected to expand the indications of tension band fixation.
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Affiliation(s)
- Yan Li
- The Second Hospital of Shandong University, Jinan, People's Republic of China.,Department of Dermatology, Jinan Central Hospital, Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Hui Li
- The Second Hospital of Shandong University, Jinan, People's Republic of China
| | - Qingguo Lai
- Department of Oral and Maxillofacial Surgery, The Second Hospital of Shandong University, Jinan, Shandong Province, People's Republic of China.,Research Center of 3D Printing in Stomatology of Shandong University, Shandong University, Shandong Province, People's Republic of China
| | - Runqi Xue
- Department of Oral and Maxillofacial Surgery, The Second Hospital of Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Kaiwen Zhu
- Department of Oral and Maxillofacial Surgery, The Second Hospital of Shandong University, Jinan, Shandong Province, People's Republic of China
| | - Yanwei Deng
- Department of Oral and Maxillofacial Surgery, The Second Hospital of Shandong University, Jinan, Shandong Province, People's Republic of China
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Cheng KJ, Liu YF, Wang R, Yuan ZX, Jiang XF, Dong XT. Biomechanical behavior of mandible with posterior marginal resection using finite element analysis. INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING 2022; 38:e3549. [PMID: 34723440 DOI: 10.1002/cnm.3549] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 06/13/2023]
Abstract
This study aims to characterize biomechanical behavior of various designs of posterior mandibular marginal resection under functional loadings using finite element method. The ultimate goal of this work is to provide clinically relevant information to prevent postoperative fracture and to stipulate prophylactic internal fixation for planning of marginal mandibulectomy. A 3D mandibular master model was reconstructed from cone beam computed tomography images. Different marginal resection models were created based on three design parameters, namely, defect curvilinear radius, anterior-posterior defect width and residual height of the mandibular body. Functional loadings from incisors (60 N) and contralateral first molar area (200 N) were applied to designed models and stress patterns were compared of five groups with curvilinear radius from 0 (conventional rectangular shape), 2.5, 3.5, 5, and 6 mm. Models with 25, 35 and 45 mm defect width mimic defects varied from canine to 3rd molar were tested. Residual height range from 10 to 4 mm was assessed. The results show high stresses predominated in the occlusal area and the posterior inferior border near the resection corner. The average maximum stress decreased by 29.8% (r = 2.5 mm), 51.9% (r = 3.5 mm), 54.4% (r = 5 mm), and 59.3% (r = 6 mm) compared to the baseline of r = 0 mm. The results from the combined defect width/residual height models demonstrate the increase of defect width and the decrease in residual height resulted in the increase of maximum stress. Our data also confirm that the factor of residual height supersedes defect width in terms of prevention of postoperative fracture when considering resection design.
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Affiliation(s)
- Kang-Jie Cheng
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, China
- National International Joint Research Center of Special Purpose Equipment and Advanced Processing Technology, Zhejiang University of Technology, Hangzhou, China
| | - Yun-Feng Liu
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, China
- National International Joint Research Center of Special Purpose Equipment and Advanced Processing Technology, Zhejiang University of Technology, Hangzhou, China
| | - Russell Wang
- Department of Comprehensive Care, Case Western Reserve University School of Dental Medicine, Cleveland, Ohio, USA
| | - Zi-Xi Yuan
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, China
- National International Joint Research Center of Special Purpose Equipment and Advanced Processing Technology, Zhejiang University of Technology, Hangzhou, China
| | - Xian-Feng Jiang
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, China
| | - Xing-Tao Dong
- College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
- Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education and Zhejiang Province, Zhejiang University of Technology, Hangzhou, China
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Turek P, Pakla P, Budzik G, Lewandowski B, Przeszłowski Ł, Dziubek T, Wolski S, Frańczak J. Procedure Increasing the Accuracy of Modelling and the Manufacturing of Surgical Templates with the Use of 3D Printing Techniques, Applied in Planning the Procedures of Reconstruction of the Mandible. J Clin Med 2021; 10:jcm10235525. [PMID: 34884227 PMCID: PMC8658254 DOI: 10.3390/jcm10235525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/22/2021] [Accepted: 11/22/2021] [Indexed: 12/19/2022] Open
Abstract
The application of anatomical models and surgical templates in maxillofacial surgery allows, among other benefits, the increase of precision and the shortening of the operation time. Insufficiently precise anastomosis of the broken parts of the mandible may adversely affect the functioning of this organ. Applying the modern mechanical engineering methods, including computer-aided design methods (CAD), reverse engineering (RE), and rapid prototyping (RP), a procedure used to shorten the data processing time and increase the accuracy of modelling anatomical structures and the surgical templates with the use of 3D printing techniques was developed. The basis for developing and testing this procedure was the medical imaging data DICOM of patients treated at the Maxillofacial Surgery Clinic of the Fryderyk Chopin Provincial Clinical Hospital in Rzeszów. The patients were operated on because of malignant tumours of the floor of the oral cavity and the necrosis of the mandibular corpus, requiring an extensive resection of the soft tissues and resection of the mandible. Familiarity with and the implementation of the developed procedure allowed doctors to plan the operation precisely and prepare the surgical templates and tools in terms of the expected accuracy of the procedures. The models obtained based on this procedure shortened the operation time and increased the accuracy of performance, which accelerated the patient’s rehabilitation in the further course of events.
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Affiliation(s)
- Paweł Turek
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
- Correspondence:
| | - Paweł Pakla
- Department of Maxillofacial Surgery, Fryderyk Chopin Clinical Voivodeship Hospital No.1 in Rzeszów, 35-055 Rzeszów, Poland; (P.P.); (B.L.); (J.F.)
| | - Grzegorz Budzik
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
| | - Bogumił Lewandowski
- Department of Maxillofacial Surgery, Fryderyk Chopin Clinical Voivodeship Hospital No.1 in Rzeszów, 35-055 Rzeszów, Poland; (P.P.); (B.L.); (J.F.)
- Collegium Medicum, University of Rzeszów, 35-315 Rzeszów, Poland
| | - Łukasz Przeszłowski
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
| | - Tomasz Dziubek
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
| | - Sławomir Wolski
- Faculty of Mathematics and Applied Physics, Rzeszów University of Technology, 35-959 Rzeszów, Poland;
| | - Jan Frańczak
- Department of Maxillofacial Surgery, Fryderyk Chopin Clinical Voivodeship Hospital No.1 in Rzeszów, 35-055 Rzeszów, Poland; (P.P.); (B.L.); (J.F.)
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Zelaya-Lainez L, Kariem H, Nischkauer W, Limbeck A, Hellmich C. "Variances" and "in-variances" in hierarchical porosity and composition, across femoral tissues from cow, horse, ostrich, emu, pig, rabbit, and frog. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 117:111234. [PMID: 32919621 DOI: 10.1016/j.msec.2020.111234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 06/10/2020] [Accepted: 06/21/2020] [Indexed: 10/24/2022]
Abstract
It is very well known that bone is a hierarchically organized material produced by bone cells residing in the fluid environments filling (larger) vascular pores and (smaller) lacunar pores. The extracellular space consists of hydroxyapatite crystals, collagen type I molecules, and water with non-collageneous organics. It is less known to which extent the associated quantities (mineral, organic, and water concentrations; vascular, lacunar, and extracellular porosities) vary across species, organs, and ages. We here investigate the aforementioned quantities across femoral shaft tissues from cow, horse, emu, frog, ostrich, pig, and rabbit; by means of light microscopy and dehydration-demineralization tests; thereby revealing interesting invariances: The extracellular volume fractions of organic matter turn out to be similar across all tested non-amphibian tissues; as do the extracellular volume fractions of hydroxyapatite across all tested mammals. Hence, the chemical composition of the femoral extracellular bone matrix is remarkably "invariant" across differently aged mammals; while the water content shows significant variations, as does the partitions of water between the different pore spaces. The latter exhibit strikingly varying morphologies as well. This finding adds to the ample "universal patterns" in the sense of evolutionary developmental biology; and it provides interesting design requirements for the development of novel biomimetic tissue engineering solutions.
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Affiliation(s)
- Luis Zelaya-Lainez
- Institute for Mechanics of Materials and Structures, TU Wien - Vienna University of Technology, Karlsplatz 13/E202, 1040 Vienna, Austria
| | - Hawraa Kariem
- Institute for Mechanics of Materials and Structures, TU Wien - Vienna University of Technology, Karlsplatz 13/E202, 1040 Vienna, Austria
| | - Winfried Nischkauer
- Institute of Chemical Technologies and Analytics, Division of Instrumental Analytical Chemistry, TU Wien - Vienna University of Technology, Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Andreas Limbeck
- Institute of Chemical Technologies and Analytics, Division of Instrumental Analytical Chemistry, TU Wien - Vienna University of Technology, Getreidemarkt 9/164, 1060 Vienna, Austria
| | - Christian Hellmich
- Institute for Mechanics of Materials and Structures, TU Wien - Vienna University of Technology, Karlsplatz 13/E202, 1040 Vienna, Austria.
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Pang Y, Zhang K, Liu L, Feng D, Liu C, Wang J, Du Y, Guo Z. [Biomechanical study of cystic lesions of the mandible based on a three-dimensional finite element model]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:911-915. [PMID: 32895206 DOI: 10.12122/j.issn.1673-4254.2020.06.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To analyze the biomechanics of cystic lesions in the mandibular body in a three-dimensional (3D) finite element model. METHODS A 3D finite element model of cystic lesion of the mandibular body was constructed based on the CT images of the mandible of a healthy adult female volunteer with normal occlusion. The size of the cyst and the residual bone wall were analyzed when the lesion area approached the stress peak under certain constraints and loading conditions. RESULTS When the size of the cyst reached 37.63 mm×11.32 mm×21.45 mm, the maximal von Mises stress in the lesion area reached 77.295 MPa, close to the yield strength of the mandible with a risk of pathological fracture. At this point, the remaining bone thickness of the buccal and lingual sides and the lower margin of the mandible in the lesion area was 1.52 mm, 0.76 mm and 1.04 mm, respectively. CONCLUSIONS Residual bone mass is an important factor to affect the risk of pathological fracture after curettage of cystic lesions. A thickness as low as 1 mm of the residual bone cortex in the cystic lesion area of the mandibular body can be used as the threshold for a clinical decision on one-stage windowing decompression combined with two- stage curettage.
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Affiliation(s)
- Yaqian Pang
- Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Kai Zhang
- Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Liang Liu
- Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Dajun Feng
- Department of Oral and Maxillofacial Surgery, Fourth Affiliated Hospital of Anhui Medical University, Hefei 230001, China
| | - Chang Liu
- Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Jing Wang
- Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Yue Du
- Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Zhenfei Guo
- Department of Stomatology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
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Wang L, Shi Q, Cai Y, Chen Q, Guo X, Li Z. Mechanical–chemical coupled modeling of bone regeneration within a biodegradable polymer scaffold loaded with VEGF. Biomech Model Mechanobiol 2020; 19:2285-2306. [DOI: 10.1007/s10237-020-01339-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 05/12/2020] [Indexed: 10/24/2022]
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