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Surgical treatment for both-column acetabular fractures using pre-operative virtual simulation and three-dimensional printing techniques

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Chinese Medical Journal 2020年第4期133卷 395-401页

作者： Ji-Hui Huang Hui Liao Xin-Yu Tan Wei-Rong Xing Qi Zhou Yu-Shi Zheng Hong-Yu Cao Can-Jun Zeng Department of Orthopedics The Third Affiliated Hospital of Southern Medical UniversityGuangzhouGuangdong 510630China Southern Medical University GuangzhouGuangdong 510515China Musculoskeletal Disease Center Jerry L.Pettis Memorial Veterans Affairs Medical CenterLoma LindaCA 92357USA Department of Medicine Loma Linda UniversityLoma LindaCA 92354USA

Background:Surgical treatment of both-column acetabular fractures is challenging because of the complex acetabular fracture patterns and the curved surface of the *** study has compared the application of three-dimensional(3D)printing technology and traditional methods of contouring plates intra-operatively for the surgical treatment of both-column acetabular *** presented the use of both 3D printing technology and a virtual simulation in pre-operative planning for both-column acetabular *** hypothesized that 3D printing technology will assist orthopedic surgeons in shortening the surgical time and improving the clinical ***:Forty patients with both-column acetabular fractures were recruited in the randomized prospective case-control study from September 2013 to September 2017 for this prospective study(***1900028230).We allocated the patients to two groups using block randomization(3D printing group,n=20;conventional method group,n=20).For the 3D printing group,1:1 scaled pelvic models were created using 3D printing,and the plates were pre-contoured according to the pelvic *** plates for the conventional method group were contoured during the operation without 3D printed pelvic *** operation time,instrumentation time,time of intra-operative fluoroscopy,blood loss,number of times the approach was performed,blood transfusion,post-operative fracture reduction quality,hip joint function,and complications were recorded and compared between the two ***:The operation and instrumentation times in the 3D printing group were significantly shorter(130.8±29.2 min,t=-7.5,Pprinting group were significantly lower(500[400,800]mL,Mann-Whitney U=74.5,P<0.001 and 0[0,400]mL,Mann-Whitney U=59.5,P<0.001,respectively)than those in the conventional method group.T

关键词： Both-column Acetabulum fractures Computer simulation Three-dimensional printing Internal fracture fixation

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Radiotherapy-customized head immobilization masks:from modeling and analysis to 3D printing

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Nuclear Science and Techniques 2019年第9期30卷 103-118页

作者： M.A.R.Loja D.S.Craveiro L.Vieira E.Sousa J.A.Rodrigues R.J.F.Portal CIMOSM Centro de Investigacao em Modelacao e Optimizacao de Sistemas Multifuncionais ISEL IPL Instituto Superior de Engenharia de Lisboa Av. Conselheiro Emidio Navarro 1 1959-007 Lisbon Portugal LAETA IDMEC Instituto Superior Teccnico Universidade de Lisboa Av. Rovisco Pais 1 1049-001 Lisbon Portugal Department of Mechanical and Industrial Engineering Faculty of Science and Technology NOVA UNIDEMI Universidade Nova de Lisboa Caparica Portugal H&TRC -Health &Technology Research Center ESTeSL - Escola Superior de Tecnologia da Saude de Lisboa Av. D. Joao II Lote 4.69.01 1990-096 Lisbon Portugal Instituto de Biofisica e Engenharia Biomedica Faculdade de Ciencias da Universidade de Lisboa Lisbon Portugal

Immobilization devices may be a valuable aid to ensure the improved effectiveness of radiotherapy treatments where constraining the movements of specific anatomical segments is crucial. This need is also present in other situations, specifically when the superposition of various medical images is required for fine identification and characterization of some pathologies. Because of their structural characteristics, existing head immobilization systems may be claustrophobic and very uncomfortable for patients, during both the modeling and usage stages. Because of this, it is important to minimize all the discomforts related to the mask to alleviate patients’ distress and to simultaneously guarantee and maximize the restraint effectiveness of the mask. In the present work, various head immobilization mask models are proposed based on geometrical information extracted from computerized tomography images and from 3D laser scanning point clouds. These models also consider the corresponding connection to a radiotherapy table, as this connection is easily altered to accommodate various manufacturers’ solutions. A set of materials used in the radiotherapy field is considered to allow the assessment of the stiffness and strength of the masks when submitted to typical loadings.

关键词： Computed tomography 3D laser scanning Geometric modeling Head immobilization devices Stiffness and strength analyses 3D printing

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Why choose 3D bioprinting?Part Ⅲ:printing in vitro 3D models for drug screening

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Bio-Design and Manufacturing 2020年第3期3卷 160-163页

作者： Yong He Jing Nie Mingjun Xie Qing Gao State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China

Dilemmas of current drug screening Recently,multiple technological advancements have been involved in the process of drug research and *** addition,the spending on the relevant projects has doubled in the last 20 years,cumulatively increasing 28%from 2014 to ***,these improvements have not led directly to an obvious increase in feasible drug candidates that successfully passed the clinical *** to the increased spending and stagnant clinical success rate of 10–20%,the efficiency of this project drastically decreased from around 40 drugs per billion in 1950 to 0.6 drugs in 2012.

关键词： printing drugs doubled

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To inhibit coffee ring effect in inkjet printing of light-emitting polymer films by decreasing capillary force

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Chinese Chemical Letters 2019年第1期30卷 135-138页

作者： Xinhong Yu Rubo Xing Zhongxiang Peng Yangming Lin Zhonghui Du Junqiao Ding Lixiang Wang Yanchun Han State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences

Polymer thin film with uniform thickness and flat surface profile is the key point for polymer light emitting diodes(PLEDs) by inkjet printing. However, the coffee ring effect is usually observed due to the mismatch between the evaporation of the solvent and the decrease of solution volume, which promotes the formation of radial flow from the interior of the drop to the edge. In this paper, coffee ring effects of inkjet printed poly(spirobifluorene) films were proposed to be restrained by decreasing capillary force by adding co-solvent with high boiling point and high viscosity to the main solvent. The low evaporation rate of the co-solvent can reduce the driving force of the radial flow; meanwhile the high viscosity of the co-solvent can increase the resistance of the radial flow. Thus, polymer films with improve uniformity can be obtained due to the suppression of the radial flow. The device performance was greatly improved under the condition of proper film thickness and film uniformity and the maximum luminous efficiency of devices with inkjet printed poly(spirobifluorene) can reach 80% of the spin-coated devices.

关键词： Inkjet printing Coffee ring effect Polymer film Uniformity Organic light emitting diodes

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Patterning catalyst via inkjet printing to grow single-walled carbon nanotubes

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中国化学快报：英文版 2019年第2期30卷 505-508页

作者： Zeyao Zhang Yitan Li Sheng Zhu Xiyan Liu Xiulan Zhao Meihui Li Haoyu Li Feng Yang Yan Li Beijing National Laboratory for Molecular Science Key Laboratory for the Physics and Chemistry of Nanodevices State Key Laboratory of Rare Earth Materials Chemistry and Applications College of Chemistry and Molecular Engineering Peking University Academy for Advanced Interdisciplinary Studies Peking University

Controlled growth of patterned single-walled carbon nanotubes (SWNTs) is an important issue in many applications. Herein, we demonstrated a method to pattern catalyst via inkjet printing for the growth of SWNTs, using metal salt solutions as the inks and an ordinary office-use printer. We printed water solutions of cobalt acetate on hydrophilic Si substrates and grew high quality SWNT films. The composition of the precursor solutions and the hydrophilicity of the substrates were crucial factors to the patterning.

关键词： Single-walled carbon nanotubes Inkjet printing Patterning Contact angle Chemical vapor deposition

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Screen printing of silver nanowires: balancing conductivity with transparency while maintaining flexibility and stretchability

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npj Flexible Electronics 2019年第1期3卷 106-113页

作者： Weiwei Li Shuai Yang Atif Shamim IMPACT Lab ComputerElectrical and Mathematical Sciences and Engineering(CEMSE)DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

printing metal nanowires are particularly attractive as compared to conventional coating methods due to the ease of processing,direct patterning,and large-scale fabrication ***,it is still challenging to print metal nanowire patterns that simultaneously have high conductivity,high transparency,flexibility,and *** steps have been taken in this work to balance the transparency and conductivity of the screen-printed flexible and stretchable silver nanowire films,(1)selection of the ink formulation,(2)optimization of the printing parameters,and(3)posttreatment with a *** as-obtained silver nanowire patterns are large-area and demonstrate an ultralow sheet resistance of 1.9 ohm/sq,high transmittance(73%)at the wavelength of 550 nm,and an ultrahigh figure of merit(~136)as compared to the printed silver nanowire electrodes in the *** screenprinted transparent patterns exhibit excellent electrical stability and mechanical repeatability when subjected to 1000 bending cycles with a bending radius of 28 mm and 1000 stretch-release cycles with 10%strain,which makes the transparent patterns suitable for the fabrication of flexible,transparent microwave *** absorption performance of the prepared frequency selective surface absorbers indicates no obvious degradation after various manipulating configurations and multiple bending and stretching *** results are promising enough to make this ink and screen-printing process suitable for many applications of flexible,stretchable,and transparent electronics.

关键词： nanowires silver printing

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Application of the Guiding Template Designed by Three-dimensional printing Data for the Insertion of Sacroiliac Screws:a New Clinical Technique

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Current Medical Science 2018年第6期38卷 1090-1095页

作者： Yi LIU Wu ZHOU Tian XIA Jing LIU Bo-bin MI Liang-cong HU Zeng-wu SHAO Guo-hui LIU Department of Orthopedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

This study is aimed to explore the clinical application of the guiding template designed by three-dimensional printing data for the insertion of sacroiliac screws.A retrospective study of 7 cases (from July 2016 to December 2016),in which the guiding template printed by the three-dimensional printing technique was used for the insertion of sacroiliac screws of patients with posterior ring injuries of pelvis,was ***,4 males and 3 females were included in template group,aged from 38to 65years old (mean 50.86±8.90).Of them,5 had sacral fractures (3 with Denis type Ⅰ and 2 with type Ⅱ)and 2 the separation of sacroiliac *** templates were firstly made by the three-dimensional printing technique based on the pre-operative CT data. Surgical operations for the stabilization of pelvic ring by applying the guiding templates were carried out.A group of 8 patients with sacroiliac injuries treated by percutaneous sacroiliac screws were analyzed as a control group *** time of each screw insertion,volume of intra-operative blood loss,and the exposure to X ray were analyzed and the Matta's radiological criteria were used to evaluate the reduction *** Majeed score was used to evaluate postoperative living *** visual analogue scale (VAS)was applied at different time points to judge pain relief of *** the 7 patients in the template group were closely followed up radiographically and clinically for 14 to 20 months,mean (16.57±2.44)*** 9 sacroiliac screws for the S 1 and S2 vertebra were inserted in the 7 *** time length for each screw insertion ranged from 450 to 870 s,mean (690.56±135.68)s,and the number of times of exposure to X ray were 4 to 8,mean (5.78±1.20).The intra-operative blood loss ranged from 45to 120 mL,mean (75±23.32)*** to Matta's radiology criteria,the fracture and dislocation reduction were excellent in 6cases and good in *** pre-operative VAS score ranged from 5.2 to 8.1

关键词： sacroiliac screws three-dimensional printing technique posterior pelvic ring injury guiding template

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Transfer printing techniques for flexible and stretchable inorganic electronics

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npj Flexible Electronics 2018年第1期2卷 199-212页

作者： Changhong Linghu Shun Zhang Chengjun Wang Jizhou Song Department of Engineering Mechanics Soft Matter Research Centerand Key Laboratory of Soft Machines and Smart Devices of Zhejiang ProvinceZhejiang University310027 HangzhouChina

Transfer printing is an emerging deterministic assembly technique for micro-fabrication and nano-fabrication,which enables the heterogeneous integration of classes of materials into desired functional *** creates engineering opportunities in the area of flexible and stretchable inorganic electronics with equal performance to conventional wafer-based devices but the ability to be deformed like a rubber,where prefabricated inorganic semiconductor materials or devices on the donor wafer are required to be transfer-printed onto unconventional flexible *** paper provides a brief review of recent advances on transfer printing techniques for flexible and stretchable inorganic *** basic concept for each transfer printing technique is *** performances of these transfer printing techniques are summarized and compared followed by the discussions of perspectives and challenges for future developments and applications.

关键词： printing inorganic discussions

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Highly concentrated graphene oxide ink for facile 3D printing of supercapacitors

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Nano Materials Science 2019年第2期1卷 142-148页

作者： Shangwen Ling Wenbin Kang Shanwen Tao Chuhong Zhang State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Chengdu 610065 China School of Engineering University of Warwick Coventry CV4 7AL UK

3D printing of functional energy storage devices is receiving escalating attention over the years due to the customizable manufacturing flexibility and imparted high areal and gravimetric energy density of three-dimensional structured devices, which contribute to the creation of numerous new opportunities for futuristic electronics. Graphene-based inks are ideal elements for the realization of 3D printed energy storage devices if the attractive intrinsic physiochemical properties of graphene could be preserved. However, it is still a great challenge to prepare uniformly dispersed graphene-based materials with desired rheological properties for 3D printing. Here we report a facile strategy for 3D printing of supercapacitors from a highly concentrated graphene oxide (GO) ink. The GO is properly dispersed and the ink fulfills the stringent rheological specifications for 3D printing. The printed GO electrode is functionalized with enhanced structural stability for proper reduction to graphene. The printed supercapacitors deliver the potential to linearly scale up in areal capacitance without jeopardizing the gravimetric capacitance when increasing printed layers. The results hold great promise for the construction of 3D structured energy storage devices that cater to the challenges from next-generation electronics.

关键词： 3D printing Graphene Functional ink Supercapacitor

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Allogenic tooth transplantation using 3D printing: A case report and review of the literature

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World Journal of Clinical Cases 2019年第17期7卷 2587-2596页

作者： Hu-Di Xu Richard J Miron Xiao-Xin Zhang Yu-Feng Zhang The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei- MOST) and Key Laboratory of Oral Biomedicine Ministry of Education Wuhan UniversityWuhan 430079Hubei ProvinceChina Department of Periodontology College of Dental MedicineNova Southeastern UniversityFort LauderdaleFL 33314-7796United States Department of Oral Implantology School of StomatologyWuhan UniversityWuhan 430079Hubei ProvinceChina

BACKGROUND The history of allogenic tooth transplantation can be traced back to the 16th *** there have been many successful cases,much needs to be better understood and researched prior to the technique being translated to everyday clinical *** SUMMARY In the present report,we describe a case of allogenic tooth transplantation between a mother and her *** first left maxillary molar of the mother was diagnosed with residual root resorption and needed to be *** 3rd molar of the daughter was used as a donor *** to transplantation,a 3D printing system was introduced to fabricate an individualized reamer drill specifically designed utilizing the donor’s tooth as a *** specific design of our 3D printed bur allowed for the recipient site to better match the donor *** the ability to 3D print in layers,even the protuberance of the root can be matched and 3D printed,thereby minimizing unnecessary bone *** Our study is a pioneering case combining 3D printing with allogenic tooth transplantation,which could be able to minimize unnecessary bone loss and improve the implant *** article aims to enhance our understanding of allogenic tooth transplantation and 3D printing,and may potentially lead to tooth transplantation being utilized more frequently - especially since transplantations are so commonly utilized in many other fields of medicine with high success rates.

关键词： Transplantation Allografts Dental implants 3D printing Case report

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