Academic literature on the topic '3D Printed Bracket'
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Journal articles on the topic "3D Printed Bracket"
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Rattanasumawong, Sopit, Peerapong Santiwong, Somchart Raocharernporn, and Syrina Tantidhnazet. "Accuracy of Three Bracket Transfer Media for Indirect Bonding Techniques (IDB) Fabricated by Three-Dimensional Printing." Applied Mechanics and Materials 897 (April 2020): 179–84. http://dx.doi.org/10.4028/www.scientific.net/amm.897.179.
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To evaluate and compare the accuracy of bracket placement in three bracket transfer media techniques for indirect bonding. A total of 300 brackets were bonded on dental casts by indirect bonding techniques using three different bracket transfer media. The bracket positions were simulated by digital software. In the first two methods, digital models were designed with two types of markers, one with fully mocked up bracket (container method), and another with only marked bracket margins (marker method), then the models were printed out by a three-dimensional (3D) printer using pink resin and bracket transfer trays were vacuum formed on these models with polyvinylsiloxane. In the third methods, digital software was used to design full arch transfer trays, and printed by a stereolithographic 3D printer using elastic resin. With the transfer trays, the brackets were bonded onto dental stone casts, and a 3D model scanner was used to capture the final bracket positions on the casts. Superimpositions between the planned and actual bracket positions were done. Nonparametric statistical analyses were used to determine whether there were significant differences between planned and actual bracket positions and between the three methods. All significant differences in bracket position were less than 0.31 mm and most (95%) were less than 0.08 mm. Significant differences between all three methods were found. Indirect bonding methods using digital software combined with 3D printing show good accuracy with clinically insignificant positional discrepancies of less than 0.5mm.
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Duarte, Maria Eduarda Assad, Bruno Frazão Gribel, Alice Spitz, Flavia Artese, and José Augusto Mendes Miguel. "Reproducibility of Digital Indirect Bonding Technique Using Three-dimensional (3d) Models and 3d-printed Transfer Trays." Angle Orthodontist 90, no. 1 (2019): 92–99. http://dx.doi.org/10.2319/030919-176.1.
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ABSTRACT Objective To evaluate the reproducibility of digital tray transfer fit on digital indirect bonding by analyzing the differences in bracket positions. Materials and Methods Digital indirect bonding was performed by positioning brackets on digital models superimposed by tomography using Ortho Analyzer (3Shape) software. Thirty-three orthodontists performed indirect bonding on prototyped models of the same malocclusion using prototyped transfer trays for two types of brackets (MiniSprint Roth and BioQuick self-ligating). The models with brackets were scanned using an intraoral scanner (Trios, 3Shape). Superimpositions were made between the digital models obtained after indirect bonding and those from the original virtual setup. To analyze the differences in bracket positions, three planes were examined for each bracket: vertical, horizontal, and angulation. Three orthodontists repeated indirect bonding after 15 days, and Bland-Altman plots and intraclass correlation coefficients were used to evaluate inter- and intraevaluator reproducibility and reliability, respectively. Repeated-measures analysis of variance (ANOVA) was used to analyze the differences between bracket positions, and multivariate ANOVA was used to evaluate the influence of orthodontists' experience on the results. Results Differences between bracket positions were not statistically significant, except mesial-distal discrepancies in the BioQuick group (P = .016). However, differences were not clinically significant (horizontal varied from 0.04 to 0.13 mm; angulation, 0.45° to 2.03°). There was no significant influence of orthodontist experience and years of clinical practice on bracket positions (P = .314 and P = .158). The reproducibility among orthodontists was confirmed. Conclusions The reproducibility of digital indirect bonding was confirmed in terms of bracket positions using three-dimensional printed transfer trays.
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Süpple, Julia, Julius von Glasenapp, Eva Hofmann, Paul-Georg Jost-Brinkmann, and Petra Julia Koch. "Accurate Bracket Placement with an Indirect Bonding Method Using Digitally Designed Transfer Models Printed in Different Orientations—An In Vitro Study." Journal of Clinical Medicine 10, no. 9 (2021): 2002. http://dx.doi.org/10.3390/jcm10092002.
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Objective: A digital workflow opens up new possibilities for the indirect bonding (IDB) of brackets. We tested if the printing orientation for bracket transfer models on the build platform of a 3D printer influences the accuracy of the following IDB method. We also evaluated the clinical acceptability of the IDB method combining digitally planned and printed transfer models with the conventional fabrication of pressure-molded transfer trays. Materials and Methods: In total, 27 digitally planned bracket transfer models were printed with both 15° and 75° angulation from horizontal plane on the build platform of a digital light processing (DLP) printer. Brackets were temporarily bonded to the transfer models and pressure-molded trays were produced on them. IDB was then performed using the trays on the respective plaster models. The plaster models were scanned with an optical scanner. Digitally planned pre-bonding and scanned post-bonding bracket positions were superimposed with a software and resulted in three linear and three angular deviations per bracket. Results: No statistically significant differences of the transfer accuracy of printed transfer models angulated 15° or 75° on the 3D printer build platform were found. About 97% of the linear and 82% of the angular deviations were within the clinically acceptable range of ±0.2 mm and ±1°, respectively. The highest inaccuracies in the linear dimension occurred in the vertical towards the gingival direction and in the angular dimension in palatal crown torque. Conclusion: For the IDB method used, the printing orientation on the build platform did not have a significant impact on the transfer accuracy.
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Niu, Ye, Yunting Zeng, Zeyu Zhang, Wanghan Xu, and Liwei Xiao. "Comparison of the transfer accuracy of two digital indirect bonding trays for labial bracket bonding." Angle Orthodontist 91, no. 1 (2020): 67–73. http://dx.doi.org/10.2319/013120-70.1.
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ABSTRACT Objectives To compare the transfer accuracy of two digital transfer trays, the three-dimensional printed (3D printed) tray and the vacuum-formed tray, in the indirect bonding of labial brackets. Materials and Methods Ten digital dental models were constructed by oral scans using an optical scanning system. 3D printed trays and vacuum-formed trays were obtained through the 3Shape indirect bonding system and rapid prototyping technology (10 in each group). Then labial brackets were transferred to 3D printed models, and the models with final bracket positioning were scanned. Linear (mesiodistal, vertical, buccolingual) and angular (angulation, torque, rotation) transfer errors were measured using GOM Inspect software. The mean transfer errors and prevalence of clinically acceptable errors (linear errors of ≤0.5 mm and angular errors of ≤2°) of two digital trays were compared using the Mann-Whitney U-test and the Chi-square test, respectively. Results The 3D printed tray had a lower mean mesiodistal transfer error (P < .01) and a higher prevalence of rotation error within the limit of 2° (P = .03) than did the vacuum-formed tray. Linear errors within 0.5 mm were higher than 90% for both groups, while torque errors within 2° were lowest at 50.9% and 52.9% for the 3D printed tray and vacuum-formed tray, respectively. Both groups had a directional bias toward the occlusal, mesial, and buccal. Conclusions The 3D printed tray generally scored better in terms of transfer accuracy than did the vacuum-formed tray. Both types of trays had better linear control than angular control of brackets.
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Jungbauer, Rebecca, Jonas Breunig, Alois Schmid, et al. "Transfer Accuracy of Two 3D Printed Trays for Indirect Bracket Bonding—An In Vitro Pilot Study." Applied Sciences 11, no. 13 (2021): 6013. http://dx.doi.org/10.3390/app11136013.
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The present study aimed to investigate the impact of hardness from 3D printed transfer trays and dental crowding on bracket bonding accuracy. Lower models (no crowding group: Little’s Irregularity Index (LII) < 3, crowding group: LII > 7, n = 10 per group) were selected at random, digitized, 3D printed, and utilized for semiautomated virtual positioning of brackets and tubes. Hard and soft transfer trays were fabricated with polyjet printing and digital light processing, respectively. Brackets and tubes were transferred to the 3D printed models and altogether digitized using intraoral scanning (IOS) and microcomputed tomography (micro-CT) for assessment of linear and angular deviations. Mean intra- and interrater reliability amounted to 0.67 ± 0.34/0.79 ± 0.16 for IOS, and 0.92 ± 0.05/0.92 ± 0.5 for the micro-CT measurements. Minor linear discrepancies were observed (median: 0.11 mm, Q1–Q3: −0.06–0.28 mm). Deviations in torque (median: 2.49°, Q1–Q3: 1.27–4.03°) were greater than angular ones (median: 1.81°, Q1–Q3: 1.05°–2.90°), higher for hard (median: 2.49°, Q1–Q3: 1.32–3.91°) compared to soft (median: 1.77°, Q1–Q3: 0.94–3.01°) trays (p < 0.001), and torque errors were more pronounced at crowded front teeth (p < 0.05). In conclusion, the clinician should carefully consider the potential impact of hardness and crowding on bracket transfer accuracy, specifically in torque and angular orientation.
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Balut, Nasib, Digant P. Thakkar, Enrique Gonzalez, Rodrigo Eluani, and Luis David Silva. "Digital orthodontic indirect bonding systems: A new wave." APOS Trends in Orthodontics 10 (September 18, 2020): 195–200. http://dx.doi.org/10.25259/apos_18_2020.
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Digital technologies are progressing with leaps and bounds and the field of orthodontics is not untouched by it, with innovations like intraoral scanners and 3D printers being easy to own and maintain and increased availability of biocompatible 3D printing materials orthodontist are curious to use this technology to improve orthodontic bracket positioning which would require minimal to no repositioning during the course of treatment. The authors here have tried to outline 2 different methods using CBCT and VTO as guide to decide the bracket positioning digitally and using 3D printed Indirect Bonding trays for orthodontic bonding.
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Haynie, Allison S., Jeryl D. English, Rade D. Paravina, et al. "Colour stability of 3D-printed resin orthodontic brackets." Journal of Orthodontics 48, no. 3 (2021): 241–49. http://dx.doi.org/10.1177/14653125211001079.
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Objective: To evaluate the colour stability of polymeric resins that could be used to 3D-print orthodontic brackets. Design: In vitro, laboratory study Materials and Methods: Disc-shaped specimens were fabricated via 3D printing using three resins: Dental LT; Dental SG; and Clear. Five conditions were evaluated for each resin (n = 10 per treatment per resin) to assess its corresponding effect on colour and translucency: immersion in (1) red wine, (2) coffee, (3) tea and (4) distilled water (control), and (5) exposure to accelerated aging. Colour and translucency measurements were made before and after exposure using a spectrophotometer. Mean colour differences (ΔE00) and changes in translucency parameter (ΔTP00) were calculated for each sample using the CIEDE2000 colour difference formula. Results: Statistically significant effects of the resin material, the treatment condition and interactions effects of material and condition were observed for ΔE00 and ΔTP00 ( P < 0.001). The most pronounced changes in colour (ΔE00) were a result of the staining effects of wine on all three resins, ranging from 14.5 ± 0.6 to 20.8 ± 1.2. Dental LT, Dental SG and Clear resins all showed changes in colour when exposed to certain staining agents. Dental SG and Clear resins exhibited changes in colour with aging, while the colour of Dental LT resin remained stable with aging. Conclusions: The colour changes of the resins investigated does not support their use in 3D-printed aesthetic bracket applications.
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Chen, Yisheng, Qianglong Wang, Chong Wang, et al. "Topology Optimization Design and Experimental Research of a 3D-Printed Metal Aerospace Bracket Considering Fatigue Performance." Applied Sciences 11, no. 15 (2021): 6671. http://dx.doi.org/10.3390/app11156671.
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In the aerospace industry, spacecraft often serve in harsh operating environments, so the design of ultra-lightweight and high-performance structures is a major requirement in aerospace structure design. In this article, a lightweight aerospace bracket considering fatigue performance was designed by topology optimization and manufactured by 3D-printing. Considering the requirements of assembly with a fixture for fatigue testing and avoiding stress concentration, a reconstructed model was presented by CAD software before manufacturing. To improve the fatigue performance of the structure, this article proposes the design idea of abstracting the practiced working condition of the bracket subjected to cycle loads in the vertical direction via a multiple load-case topology optimization problem by minimizing compliance under a variety of asymmetric extreme loading conditions. Parameter sweeping was used to improve the computational efficiency. The mass of the new bracket was reduced by 37% compared to the original structure. Both numerical simulation and the fatigue test were implemented to support the validity of the new bracket. This work indicates that the integration of the proposed topology optimization design method and additive manufacturing can be a powerful tool for the design of lightweight structures considering fatigue performance.
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Cai, Benxiao, Lingling Sun, and Yuchao Lei. "3D Printing Using a 60 GHz Millimeter Wave Segmented Parabolic Reflective Curved Antenna." Electronics 8, no. 2 (2019): 203. http://dx.doi.org/10.3390/electronics8020203.
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This paper proposes a segmented parabolic curved antenna, which can be used in the base station of a 60 GHz millimeter wave communication system, with an oblique Yagi antenna as a feed. By analyzing the reflection and multi-path interference cancellation phenomenon when the main lobe of the Yagi antenna is reflected, the problem of main lobe splitting is solved. 3D printing technology relying on PLA (polylactic acid) granule raw materials was used to make the coaxial connector bracket and segmented parabolic surface. The reflective surface was vacuum coated (via aluminum evaporation) with low-loss aluminum. The manufacturing method is environmentally friendly and the structure was printed with 0.1 mm accuracy based on large-scale commercial applications at a low cost. The experimental results show that the reflector antenna proposed in this paper achieves a high gain of nearly 20 dBi in 57–64 GHz frequency band and ensures that the main lobe does not split.
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WHEATLEY, Greg, and Samuel POPOOLA. "Autonomous transmission control of a 2017 Yamaha Grizzly 700 all-terrain vehicle." Scientific Journal of Silesian University of Technology. Series Transport 110 (March 1, 2021): 183–98. http://dx.doi.org/10.20858/sjsutst.2021.110.15.
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Investigation on a designed and modified standard automatic transmission for a 2017 Yamaha Grizzly All-Terrain Vehicle was carried out to allow it to be controlled remotely and autonomously while maintaining its ability to be manually operated. The vehicle is a part of a project named AutoWeed. This project aims at developing a vehicle which can be used in the Australian outback to control and eradicate weeds. Preliminary tests were conducted on the vehicle to determine the performance parameters required to replace the movement supplied by the operator. Several devices used to achieve this motion were explored. It was concluded that the Motion Dynamics HB-DJ806 - LALI10010 electromechanical linear actuator be used as a proof of concept device for this application. This device is capable of exerting 200 N at 35 mm/seconds. It has a stroke length of 50 mm and was powered by a 12V DC motor, which drew 3 amps at maximum load. Through testing, it was found that the selected actuator did not have enough stroke length to cycle through the five gears on the ATV. This error was rectified allowing the system to function as intended. To achieve a reliable design, however, the Linak LA14 actuator was purchased as a final design as it was stronger, faster and had feedback capabilities. Before procurement, the new actuator was digitally modelled using SolidWorks 2017 and 3D printed to confirm the mounting position and method. An ANSYS FEA was conducted on all the custom-made components including the actuator bracket and mounting plate to ensure reliability. The bracket model was manufactured using 3D printing from ABS. It was recommended that for reliability, the bracket should be constructed from a stronger material such as aluminium. The results gained from testing proved that the autonomous transmission system implemented was reliable and repeatable. This was justified as the system achieved a 100% success rate when cycling through gears.
Dissertations / Theses on the topic "3D Printed Bracket"
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Haverkos, Stephen M. "FRICTIONAL PROPERTIES OF NOVEL BRACKET SYSTEMS: AN IN-VITRO STUDY." VCU Scholars Compass, 2019. https://scholarscompass.vcu.edu/etd/5770.
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Orthodontic brackets undergo resistance during sliding that includes classical friction, binding, and notching. Current bracket systems are hampered by these challenging forces. As a result, the clinician usually needs to apply additional forces to overcome the resistance which increases the risk of root resorption and discomfort for the patient. This study evaluated frictional properties of a novel bracket that had polytetrafluoroethylene (Teflon™) coated rollers in its design. Five types of brackets (n = 10, each), including a passive self-ligating bracket, a traditional ligated bracket, a three-dimensionally printed direct metal laser sintering (DMLS) bracket with and without Teflon™ rollers, and computer numeric controlled (CNC) machine milled bracket with Teflon™ rollers were tested. The peak resistance values were assessed at 0°, 4°, and 8° of tip on a 0.019 x 0.025” arch wire. At 8° of tip, the DMLS and the CNC milled bracket systems, both with Teflon™ rollers, exhibited less friction as compared to the other brackets tested (p
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Baldwin, James D. "Design of a Custom Wrist Brace that can be 3D Printed from a Three-Dimensional Scan." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2161.
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Current arm bracing and casting methods for distal forearm and wrist fractures can lead to varying negative medicinal affects such as tightness, skin breakdown and bacteria growth which can cause infection. This can be alleviated by a flexibly compliant and breathable design while keeping the arm and hand fixed at the wrist to promote proper wrist and forearm fracture healing. There have been attempts made to create a 3D printable brace from a three-dimensional scan but they do not account for full encapsulation of the wrist, removability without breaking the brace, nor for the brace being too tight and leading to compartment syndrome. The goal of the brace designed in this thesis is to create a low-profile, lightweight, and breathable brace that combats the issues associated with traditional casts while also improving upon the already designed/commercially available 3D printed braces from three-dimensional scans.
An arm scan was taken of an individual and then using CAD and other design programs was modified to create a brace with a breathable pattern that doubles to alleviate discomforts associated with bracing the arm. An FEA model was created to determine the failure mechanisms of the brace and to validate the structure and material selections of the design. Once the brace was manufactured by an outsource company, the brace was applied to the student for a preliminary fit test to determine the fit and wrist alignment.
The FEA model indicates that the brace can withstand healthy human bodily forces on the wrist area. The fit test indicates that there is potential in this design to heal forearm and wrist fractures. As for the material selection, ABS vs PETG, there are indications that the PETG brace is the superior choice, but further studies are needed to validate this. Some future studies include mechanical testing, fatigue testing, and a clinical study to determine the true efficacy of this design.
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Ahmed, Muhammad Izhar, and Muhammad Izhar Ahmed. "Biomechanical analysis of Lower Limb and Trunk Segments in Patients with Scoliosis during Side Bending and Level Walking - Implication for 3D Printed Brace Design." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2qyzgk.
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碩士<br>國立臺灣科技大學<br>醫學工程研究所<br>107<br>Adolescent idiopathic scoliosis, is a complex three-dimensional deformity of the spine that affect pelvis and lower limb kinematics during primary movements of body including gait and trunk side bending. Multiple researches has have been conducted to analyse gait in scoliosis patients but most of this literature is relevant to lower limb kinematics kinetics and electromyography. Trunk biomechanics documentation is still lacking during gait and side bending movement.
The aim of this study was to elucidate biomechanical analysis including spatiotemporal parameters, kinematics, kinetics (joint moments and Ground Reaction Force (GRF), and electromyography of trunk segments and lower limb during gait and trunk side bending in adolescent idiopathic scoliosis patients with and without brace application, to find important parameters to implicate in 3-D printing brace design. In this study newly trunk mathematical model was designed by using Schroth anatomical blocks concept. Trunk was divided in upper thorax, middle thorax, lower thorax and lumber segments.
This study included three groups named as Control Group, Scoliosis Group (SG) and Scoliosis Group with Brace (SG WB) Participant from each group perform the same movements following the same experimental settings and protocols. After three-dimensional motion analysis of all the segments of trunk and lower limb, a comparison was made among the groups. Sagittal plane movement and frontal plane movements during level walking and trunk side bending was the targeted movements of this study. All the results were analysed by using Independent Samples Test to compare CG and SG. Because of small sample size SG WB group was not included in statistical analysis.
There was significant asymmetry noticed with p=0.02 for step velocity in two groups. All segment movements were not significantly different in SG than CG. However, Hip joint showed reduced range of motion (ROM) during Right Gait Cycle (RGC) and Left Gait Cycle (LGC). Trunk joint angle at maximum peak value in frontal plane showed significant difference (p=0.036 and p=0.023) at Right Toe off (RTO) during RGC and Right Heel Strike (RHS) during (LGC), respectively, trunk moved away from the thoracic apex side. Joint moments also showed some significant difference with p<0.05 during gait cycle.
Maximum Trunk Bending (MTB) in Right Side Bending (RSB) and Left Side Bending (LSB) was significantly less in SG than CG. Joint moment did not reveal noticeable difference between these two groups during side bending movement.
In this study there was not any finding for GRF statistically significant during level walking and side bending movement, but very slight difference was observed during level walking in medio-lateral direction of GRF. Electromyography pattern (EMG) for side bending movement was different and influenced by brace application in advantage and disadvantage of patient treatment. Integrated Electromyography (iEMG) of muscles including external oblique, erector spine and qudratus lumborum showed the difference in their activation.
Certain significant differences were observed between CG, SG and SG WB. These biomechanical findings will be assisting to design 3D printing scoliosis brace that would be able to reverse patho-biomechanics of three dimensional spine deformity.
Key Words: Scoliosis Bio-mechanical analysis, Brace effects in scoliosis, Trunk and lower limb bio-mechanics, Brace design and bio-mechanics
Book chapters on the topic "3D Printed Bracket"
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Li, Yun-Jing, Chien-Hsu Chen, Zheng-Yu Hoe, and Zong-Xian Yin. "Design a Stretchable Elbow Brace by the Use of 3D Printed Mesostructure." In Advances in Intelligent Systems and Computing. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-41694-6_71.
Full textConference papers on the topic "3D Printed Bracket"
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Kasture, Pranit Vijay, Prasad Deole, and John L. Irwin. "Case Study Using Open Source Additive Manufacturing (AM) Technology for Improved Part Function." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50953.
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The purpose of this study is to validate the design of plastic PLA extruded everyday use parts created in open source 3D printers, and to provide examples of design alterations so a 3D printed part will function similar to the OEM component. The methodology begins with selection of a common everyday use component that may fail under a load and need replacement. As a test specimen an aluminum coat hook is purchased, measured, modeled with 3D CAD software, analyzed and physically tested. Using AM a coat hook with identical specifications is created on a Delta style RepRap 3D printer with PLA as a material in the orientation providing the maximum strength. The 3D printed coat hook is analyzed using finite element analysis as well as physically using a loading apparatus test with identical loading and supporting conditions. The software used for the experimentation and data collection are NX9, ANSYS and NI LabVIEW. Material physical properties of open source 3D printed PLA parts obtained from tensile testing indicate that the strength of a 3D printed part will be less than that of an aluminum OEM part. Initial finite element analysis reveals the Coat Hook 3D printed using PLA deflects almost 20 times that of the OEM aluminum component when subjected to an identical load. This indicates that the component cannot be replaced with identical specifications even if there was a large factor of safety applied to the coat hook design. As a result of the study, part reinforcement features are proposed for redesign of a 3D printed part to perform as well as the OEM part under a similar load. Additional part redesigns utilizing these reinforcement features include shelf support brackets and solar photovoltaic mounting bracket systems.
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Chen, Ruiqi, Ashwin Ramachandran, Cheng Liu, Fu-Kuo Chang, and Debbie Senesky. "Tsai-Wu Analysis of a Thin-Walled 3D-Printed Polylactic Acid (PLA) Structural Bracket." In 58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics, 2017. http://dx.doi.org/10.2514/6.2017-0567.
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Zhang, Yunbo, and Tsz-Ho Kwok. "A Customer-to-Manufacturer Design Model for Custom Compression Casts." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-98043.
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Abstract This paper presents a computational framework for designing and optimizing custom compression casts/braces. Different from the conventional cast/brace design, our framework generates custom casts/braces with fitness, lightweight, and good ventilation. The computational pipeline is an end-to-end solution, directly from customer to the manufacturer, which starts from a 3D scanned human model represented by mesh and ends with the 3D printed cast/brace. Our interactive tools allows users to define and edit the 3D curves on the mesh surface, and trim the mesh surface to form the cast/brace shape using the curves. These tools are efficient and simple to use, and also they enable designing the custom casts/braces fitting to the given human body. In order to reduce the weight and improve the ventilation, we adopt the topology optimization (TO) method to optimize the cast/brace design. We extend the existing three-dimensional (3D) TO method to the mesh surface by simplifying the optimization problem to a 2D problem. Therefore, the efficiency of the TO computation is improved significantly. After the optimized cast/brace design is obtained on the mesh surface, a solid model is generated by our design interface and then sent to a 3D printer for fabrication. Simulation results show that our method can better re-disturb the stresses compared with the conventional 3D TO.
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Toscano, Juan Diego, Sahand Hajifar, Christian Oswaldo Segura, Luis Javier Segura, and Hongyue Sun. "Deformation Analysis of 3D Printed Metacarpophalangeal and Interphalangeal Joints via Transfer Learning." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-63623.
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Abstract A cast/brace is a tight garment that restricts the movement and provides support to an injured zone. Traditional casts/braces suffer from material wastage, discomfort, patient dissatisfaction, odor, unnecessary weight, and dangerous extraction procedures. These issues can be solved partially by constructing the casts/braces via 3D printing. Toward this end, we print the personalized metacarpal casts/braces (MCB) via fused deposition modeling (FDM), and investigate their mechanical properties to ensure the desired functionality. However, printing the full-size MCB is time-consuming (takes more than 11 hours in our design), making it hard to collect a sufficient data set for the mechanical properties investigation. Here, we explore the utilization of reduced-size MCB to facilitate the analysis of full-size MCB via transfer learning. In particular, three critical process variables (i.e., raster width, layer height, and extrusion temperature) were varied, and a universal testing machine was used to measure the total deformation of the MCB. We then perform the prediction of the deformation in full-size MCB with transfer learning of data from reduced-size MCB and limited data from full-size MCB. From the case study, the transfer learning approach can reduce the needs of data collection in the time-consuming full-size MCB by leveraging the information from reduced-size MCB.
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Sanz-Izquierdo, B., and Sungyun Jun. "WLAN antenna on 3D printed bracelet and wrist phantom." In 2014 Loughborough Antennas & Propagation Conference (LAPC). IEEE, 2014. http://dx.doi.org/10.1109/lapc.2014.6996400.
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Saboori, Parisa, and Margarita Corado. "Performance of Prophylactic Knee Brace." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11789.
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Abstract Female athletes are more likely to incur a knee injury compared to men when competing in the same sport. The increased risk is due to anatomical, biomechanical and hormonal differences between males and females. Women anatomically, have wider hips and this creates a greater quadriceps angle, which is the angle measured between the anterior superior iliac spine (ASIS), and a line that passes through the tibia trubercle and the middle of the patella (kneecap). Consequently, when landing after a jump, or making sudden movement, women tend to turn their feet inwards to compensate for a greater bending moment and this can result in knee injuries. This work involved using a prophylactic brace to retrain the muscle memory of the leg and thereby promote correct landing technique. The brace geometry was based on data collected from 20 previous women athletes and was 3D printed using ABS to allow some basic customization. However, even though the results were somewhat promising, they were statistically inconclusive due to unforeseen braced design issues. Consequently, a new brace will be redesigned using the feedback from the participants and a new study will be undertaken.
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Li, Rui, Aaron A. Smith, Harshitha S. Tadinada, and Zion T. H. Tse. "Heatguard: An Ultra-Low-Cost 3D Printed Sensor for Body Temperature Alert and Reporting System." In 2018 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/dmd2018-6914.
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The thermochromic device is a low-cost 3D-printed bracelet. It has the function of reading body temperature and warns individuals of the potential risk for heat related illnesses. The product is created from a thermochromic resin that is sensitive to temperature. This product can be customized to fit different age groups such as children and elders. Combined with the smartphone application, the device can provide realtime body temperature monitoring and alert to people who are vulnerable to heatstroke.
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Bolus, Nicholas B., Venu G. Ganti, and Omer T. Inan. "A 3D-Printed, Adjustable-Stiffness Knee Brace with Embedded Magnetic Angle Sensor." In 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2018. http://dx.doi.org/10.1109/embc.2018.8512600.
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Patel, Harsh, Wing Kin Chung, Vimal Viswanathan, and Sohail Zaidi. "Design and Testing of a Physical Therapy Device Controlled With Voice Commands." In ASME 2020 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/imece2020-23887.
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Abstract The world population is aging. Age-related disorders such as stroke and spinal cord injury are increasing rapidly, and such patients often suffer from mobility impairments. Wearable robotic exoskeletons are developed that serve as rehabilitation devices for these patients. An assistive knee brace is a simple wearable exoskeleton which is used to help people with mobility issues. This device provides partial assistance to the user and also helps in providing locomotion. Many exoskeletons are currently available in the market that have different functions and use. It is believed that, to date, no voice-controlled knee brace exists in an orthotic application, and that this project debuts a unique approach. This project presents the design of an assistive bionic knee joint with a motor-based actuator. The new exoskeletal mechanism uses the serial elastic actuator concept and mainly consists of a stepper motor, a ball screw, a set of spur gears, and a set of linear springs. The ball screw provides a linear movement to mimic the stretching and retracting action of a human knee. To create a proof-of-concept of the design, 3D printing is used. A voice recognition system has been developed in-house to control the exoskeleton using very simple voice commands. The motor is controlled using a motor driver and powered using an external power source. The 3D printed prototype with integrated voice-control module is tested for its essential functions. The test setup is loaded on the leg of a mannequin and tested under both no-load and full-load operation. The concept is proven to be successful in providing assistance to the human knee. However, the 3D printed material is observed to be bending, causing disruptions in the device’s operation. The reaction times are expected to be significantly larger compared to the theoretically calculated values.
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Kuhl, Spencer, Thomas M. Cook, Jose Morcuende, and Nicole Grosland. "Clubfoot Kickbar: Development of an Improved Brace for Use Following Correction of Clubfoot." In 2020 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/dmd2020-9043.
Full textAbstract:
Abstract The critical final phase of treatment for congenital talipes equinovarus, commonly referred to as clubfoot, using the Ponseti Method requires parents to use a brace in order to maintain the correct foot posture for 12–14 hours each night until four years of age. Parents have been vocal about a desire to allow their children some mobility while maintaining correct alignment for the treatment of this deformity. To that end, the University of Iowa’s medical device prototyping facility Protostudios utilizes 3D CAD design, rapid prototyping principles and state of the art 3D printers to quickly iterate upon the concept of a reciprocating brace that allows for the prescribed posture of abduction and dorsiflexion in a corrected clubfoot while allowing more mobility and higher degrees of comfort for the child. Each iteration of the design was tested for fitment with the commercially available shoe and platform system developed for the Ponseti Method of Clubfoot correction. Special attention was paid to the attachment and removal process of the brace to ensure that parents of children with the deformity would have no problem employing the brace for the prescribed frequency and duration while preventing the children from removing or destroying the brace or being pinched by its reciprocating action.