Three-Dimensional Tissue Printing Technology

Objective To assess the outcomes of traditional three-dimensional (3D) printing technology (TPT) versus mirror 3D printing technology (MTT) in treating isolated acetabular fractures (IAFs). Methods Consecutive patients with an IAF treated by either TPT or MTT at our tertiary medical centre from 2012 to 2018 were retrospectively reviewed. Follow-up was performed 1, 3, 6, and 12 months postoperatively and annually thereafter. The primary outcome was the Harris hip score (HHS), and the secondary outcomes were major intraoperative variables and key orthopaedic complications. Results One hundred fourteen eligible patients (114 hips) with an IAF (TPT, n = 56; MTT, n = 58) were evaluated. The median follow-up was 25 months (range, 21–28 months). At the last follow-up, the mean HHS was 82.46 ±14.70 for TPT and 86.30 ± 13.26 for MTT with a statistically significant difference. Significant differences were also detected in the major intraoperative variables (operation time, intraoperative blood loss, number of fluoroscopic screenings, and anatomical reduction number) and the major orthopaedic complications (loosening, implant failure, and heterotopic ossification). Conclusion Compared with TPT, MTT tends to produce accurate IAF reduction and may result in better intraoperative variables and a lower rate of major orthopaedic complications.

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Porous PLAs with Controllable Density by FDM 3D Printing and Chemical Foaming Agent

Micromachines ◽

10.3390/mi12080866 ◽

2021 ◽

Vol 12 (8) ◽

pp. 866

Author(s):

A. R. Damanpack ◽

André Sousa ◽

M. Bodaghi

Keyword(s):

3D Printing ◽

Flow Rate ◽

Three Dimensional ◽

Poly Lactic Acid ◽

Layer By Layer ◽

Printing Technology ◽

Material Density ◽

Foaming Agent ◽

3D Printing Technology ◽

Fabrication Parameters

This paper shows how fused decomposition modeling (FDM), as a three-dimensional (3D) printing technology, can engineer lightweight porous foams with controllable density. The tactic is based on the 3D printing of Poly Lactic Acid filaments with a chemical blowing agent, as well as experiments to explore how FDM parameters can control material density. Foam porosity is investigated in terms of fabrication parameters such as printing temperature and flow rate, which affect the size of bubbles produced during the layer-by-layer fabrication process. It is experimentally shown that printing temperature and flow rate have significant effects on the bubbles’ size, micro-scale material connections, stiffness and strength. An analytical equation is introduced to accurately simulate the experimental results on flow rate, density, and mechanical properties in terms of printing temperature. Due to the absence of a similar concept, mathematical model and results in the specialized literature, this paper is likely to advance the state-of-the-art lightweight foams with controllable porosity and density fabricated by FDM 3D printing technology.

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3 D printing technology and experimental study of chitosan gel using atomized solidification liquid-assisted extrusion molding

Rapid Prototyping Journal ◽

10.1108/rpj-10-2020-0234 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Yangwei Wang ◽

Peilun Lv ◽

Jian Li ◽

Liying Yu ◽

Guodong Yuan ◽

...

Keyword(s):

3D Printing ◽

Three Dimensional ◽

Theoretical Research ◽

Error Sources ◽

Printing Technology ◽

Content Type ◽

Printing Ink ◽

Printing Parameters ◽

Chitosan Gel ◽

Printing Method

Purpose This paper aims to propose a suitable atomizing solidification chitosan (CS) gel liquid extrusion molding technology for the three dimensional (3D) printing method, and experiments verify the feasibility of this method. Design/methodology/approach This paper mainly uses experimental means, combined with theoretical research. The preparation method, solidification forming method and 3D printing method of CS gel solution were studied. The CS gel printing mechanism and printing error sources are analyzed on the basis of the CS gel ink printing results, printing performance with different ratios of components by constructing a gel print prototype, experiments evaluating the CS gel printing technology and the effects of the process parameters on the scaffold formation. Findings CS printing ink was prepared; the optimal formula was found; the 3 D printing experiment of CS was completed; the optimal printing parameters were obtained; and the reliability of the forming prototype, printing ink and gel printing process was verified, which allowed for the possibility to apply the 3 D printing technology to the manufacturing of a CS gel structure. Originality/value This study can provide theoretical and technical support for the potential application of CS 3 D printed gels in tissue engineering.

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Characteristic of materials for the 3D printed building constructions by additive printing

MATEC Web of Conferences ◽

10.1051/matecconf/201822201013 ◽

2018 ◽

Vol 222 ◽

pp. 01013 ◽

Cited By ~ 2

Author(s):

Katarzyna Pacewicz ◽

Anna Sobotka ◽

Łukasz Gołek

Keyword(s):

Building Materials ◽

Raw Materials ◽

New Technology ◽

Setting Time ◽

Three Dimensional ◽

Construction Site ◽

Printing Technology ◽

Three Dimensional Printing ◽

Materials Used ◽

Dimensional Printing

Three dimensional printing is a promising new technology to erect construction objects. Around the world in every moment a new prototypes constructions are made by using this method. Three dimensional printing is taken into account as technology which can be used to print constructions in automated way on the Moon or Mars. The raw materials, which can be used with three dimensional printing have to fulfil basic requirements for those which are used in construction. That means that components of printing mortars are made from ingredients easily accessible in area nearby construction site and can be reusable. The cost of printing building objects due to that requirements is comparable to costs of traditional building, which are currently available. However additive techniques of printing needs a dedicated mortars for printer supplying. Characteristic for such mortars is: setting time, compressive strength, followability in the printing system, shape stability of every printed layer, controlling the hydration rate to ensure bonding with the subsequent layer, reusable capabilities, easily accessible raw materials, cost of such mixtures shouldn’t be too high in order to keep 3D printing competitive for traditional ways of building, mortar components should be recyclable and printing process should not influence negatively on an environment and people. All properties of printing mortars are determined by the device for additive application method. In this paper review of available materials used for three dimensional printing technology at construction site is presented. Presented materials were analysed in terms of requirements for building materials technology. Due to the lack of detailed information’s in available literature, regarding to the properties of raw materials, the results of this analysis may be used in the designing of new concrete mixtures for the use in three-dimensional printing technology for construction.

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Generating brain matrices for zebra finch brain sectioning using three-dimensional printing technology

Journal of Neuroscience Methods ◽

10.1016/j.jneumeth.2019.108399 ◽

2019 ◽

Vol 327 ◽

pp. 108399

Author(s):

Chun-Cheng Huang ◽

Yi-Ying Chen ◽

Yi-Ting Fang ◽

Yu-Chi Chen ◽

Chih-Ming Hung

Keyword(s):

Zebra Finch ◽

Three Dimensional ◽

Printing Technology ◽

Three Dimensional Printing ◽

Dimensional Printing

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The use of cone beam computed tomography and three dimensional printing technology in the restoration of a maxillectomy patient using a dental implant retained obturator

The Journal of Indian Prosthodontic Society ◽

10.4103/jips.jips_106_17 ◽

2017 ◽

Vol 17 (4) ◽

pp. 406 ◽

Cited By ~ 3

Author(s):

George Michelinakis

Keyword(s):

Computed Tomography ◽

Dental Implant ◽

Cone Beam Computed Tomography ◽

Three Dimensional ◽

Cone Beam ◽

Printing Technology ◽

Three Dimensional Printing ◽

Dimensional Printing

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Three-dimensional Printing in Maxillofacial Surgery: Hype versus Reality

Journal of Tissue Engineering ◽

10.1177/2041731418770909 ◽

2018 ◽

Vol 9 ◽

pp. 204173141877090 ◽

Cited By ~ 11

Author(s):

Alaa Aldaadaa ◽

Nazanin Owji ◽

Jonathan Knowles

Keyword(s):

Maxillofacial Surgery ◽

Three Dimensional ◽

Review Of Literature ◽

Printing Technology ◽

Three Dimensional Printing ◽

Dimensional Printing

Three-dimensional printing technology is getting more attention recently, especially in the craniofacial region. This is a review of literature enlightening the materials that have been used to date and the application of such technology within the scope of maxillofacial surgery.

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