scholarly journals Correction to Expression of Concern: Custom-made artificial eyes using 3D printing for dogs: A preliminary study

PLoS ONE ◽  
2022 ◽  
Vol 17 (1) ◽  
pp. e0262839
Author(s):  
Keyword(s):  
3D Printing ◽  
Custom Made ◽  
Preliminary Study

scholarly journals Custom-made artificial eyes using 3D printing for dogs: A preliminary study

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0242274
Author(s):  
So-Young Park ◽  
Jeong-Hee An ◽  
Hyun Kwon ◽  
Seo-Young Choi ◽  
Ka-Young Lim ◽  
...  
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Companion Animals ◽  
Manufacturing Cost ◽  
Artificial Eye ◽  
Custom Made ◽  
3D Printed ◽  
Preliminary Study ◽  
Ocular Implant

Various incurable eye diseases in companion animals often result in phthisis bulbi and eye removal surgery. Currently, the evisceration method using silicone balls is useful in animals; however, it is not available to those with impaired cornea or severe ocular atrophy. Moreover, ocular implant and prostheses are not widely used because of the diversity in animal size and eye shape, and high manufacturing cost. Here, we produced low-cost and customized artificial eyes, including implant and prosthesis, using computer-aided design and three-dimensional (3D) printing technique. For 3D modeling, the size of the artificial eyes was optimized using B-mode ultrasonography. The design was exported to STL files, and then printed using polycaprolactone (PCL) for prosthesis and mixture of PCL and hydroxyapatite (HA) for ocular implant. The 3D printed artificial eyes could be produced in less than one and half hour. The prosthesis was painted using oil colors and biocompatible resin. Two types of eye removal surgery, including evisceration and enucleation, were performed using two beagle dogs, as a preliminary study. After the surgery, the dogs were clinically evaluated for 6 months and then histopathological evaluation of the implant was done. Ocular implant was biocompatible and host tissue ingrowth was induced after in vivo application. The custom-made prosthesis was cosmetically excellent. Although long-term clinical follow-up might be required, the use of 3D printed-customized artificial eyes may be beneficial for animals that need personalized artificial eye surgery.

Custom Designed Orthodontic Attachment Manufactured Using a Biocompatible 3D Printing Material

2017 ◽  
Vol 54 (4) ◽  
pp. 757-758
Author(s):  
Riham Nagib ◽  
Camelia Szuhanek ◽  
Bogdan Moldoveanu ◽  
Meda Lavinia Negrutiu ◽  
Cosmin Sinescu ◽  
...  
Keyword(s):  
3D Printing ◽  
Treatment Planning ◽  
Computer Tomography ◽  
Volumetric Data ◽  
Impacted Teeth ◽  
3D Printing Technology ◽  
Custom Design ◽  
Custom Made ◽  
Materials Used ◽  
Orthodontic Forces

Treatment of impacted teeth often implies placing a bonded attachment and using orthodontic forces to move the tooth into occlusion. The aim of the paper is to describe a novel methodology of manufacturing orthodontic attachments for impacted teeth using the latest CAD software and 3D printing technology. A biocompatible acrylic based resin was used to print a custom made attachment designed based on the volumetric data aquired through cone bean computer tomography. Custom design of the attachment simplified clinical insertion and treatment planning and 3D printing made its manufacturing easier. Being a first trial, more reasearch is needed to improve the methodology and materials used.

scholarly journals 3D Printed Clamps for In Vitro Tensile Tests of Human Gracilis and the Superficial Third of Quadriceps Tendons

2021 ◽  
Vol 11 (6) ◽  
pp. 2563
Author(s):  
Ivan Grgić ◽  
Vjekoslav Wertheimer ◽  
Mirko Karakašić ◽  
Željko Ivandić
Keyword(s):  
3D Printing ◽  
Fused Deposition Modeling ◽  
Tensile Tests ◽  
Biomechanical Properties ◽  
Testing Procedure ◽  
Laboratory Equipment ◽  
Fused Deposition ◽  
Custom Made ◽  
3D Printed

Recent soft tissue studies have reported issues that occur during experimentation, such as the tissue slipping and rupturing during tensile loads, the lack of standard testing procedure and equipment, the necessity for existing laboratory equipment adaptation, etc. To overcome such issues and fulfil the need for the determination of the biomechanical properties of the human gracilis and the superficial third of the quadriceps tendons, 3D printed clamps with metric thread profile-based geometry were developed. The clamps’ geometry consists of a truncated pyramid pattern, which prevents the tendons from slipping and rupturing. The use of the thread application in the design of the clamp could be used in standard clamping development procedures, unlike in previously custom-made clamps. Fused deposition modeling (FDM) was used as a 3D printing technique, together with polylactic acid (PLA), which was used as a material for clamp printing. The design was confirmed and the experiments were conducted by using porcine and human tendons. The findings justify the usage of 3D printing technology for parts manufacturing in the case of tissue testing and establish independence from the existing machine clamp system, since it was possible to print clamps for each prepared specimen and thus reduce the time for experiment setup.

Proposal of custom made wrist orthoses based on 3D modelling and 3D printing

2017 ◽  
Author(s):  
Mauren Abreu de Souza ◽  
Cristiane Schmitz ◽  
Marcelo Marega Pinhel ◽  
Joao A. Palma Setti ◽  
Percy Nohama
Keyword(s):  
3D Printing ◽  
3D Modelling ◽  
Custom Made

The preliminary study of gradient AlSi alloy fabricated by 3D printing technology

2021 ◽  
Author(s):  
Shaoxin Huo ◽  
Qihai Chen ◽  
Yingqiao Zhou ◽  
Dawei Xing ◽  
Bin Wang
Keyword(s):  
3D Printing ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Alsi Alloy ◽  
Preliminary Study

scholarly journals Application of 3D printing and distributed manufacturing during the first-wave of COVID-19 pandemic. Our experience at a third-level university hospital.

2020 ◽  
Author(s):  
Ruben Perez-Mañanes ◽  
Sonia García de San José ◽  
Manuel Desco-Menéndez ◽  
Ignacio Sánchez-Arcilla ◽  
Esmeralda González-Fernández ◽  
...  
Keyword(s):  
3D Printing ◽  
Hospital Environment ◽  
Production Model ◽  
Maximum Efficiency ◽  
Special Importance ◽  
Distributed Manufacturing ◽  
Printing Technology ◽  
3D Printing Technology ◽  
Custom Made

Abstract Background 3D printing and distributed manufacturing represent a paradigm shift in the health system that is becoming critical during the COVID-19 pandemic. University hospitals are also taking on the role of manufacturers of custom-made solutions thanks to 3D printing technology. Case Presentation We present a monocentric observational case study regarding the distributed manufacturing of three groups of products during the period of the COVID-19 pandemic from 14 March to 10 May 2020: personal protective equipment, ventilatory support, and diagnostic and consumable products. Networking during this period has enabled the delivery of a total of 17,276 units of products manufactured using 3D printing technology. The most manufactured product was the face shields and ear savers, while the one that achieved the greatest clinical impact was the mechanical ventilation adapters and swabs. The products were manufactured by individuals in 57.3% of the cases, and our hospital acted as the main delivery node in a hub with 10 other hospitals. The main advantage of this production model is the fast response to stock needs, being able to adapt almost in real time.Conclusions The role of 3D printing in the hospital environment allows the reconciliation of in-house and distributed manufacturing with traditional production, providing custom-made adaptation of the specifications, as well as maximum efficiency in the working and availability of resources, which is of special importance at critical times for health systems such as the current COVID-19 pandemic.

scholarly journals Direct Ink Writing Glass: A Preliminary Step for Optical Application

2020 ◽  
Author(s):  
Bo Nan ◽  
Przemysław Gołębiewski ◽  
Ryszard Buczyński ◽  
F.J. Galindo Rosales ◽  
José Ferreira
Keyword(s):  
3D Printing ◽  
Fine Powder ◽  
Glass Frit ◽  
Direct Ink Writing ◽  
Base Materials ◽  
Alkaline Oxide ◽  
Fine Glass ◽  
Preliminary Study ◽  
High Alkali ◽  
Additional Phase

In this paper, we present a preliminary study and conceptual idea concerning 3D printing water-sensitive glass by exemplifying with a borosilicate glass with high alkali and alkaline oxide contents using direct ink writing. The investigated material was prepared in the form of a glass frit, which was further ground in order to obtain a fine powder of desired particle size distribution. In a following step, inks were prepared by mixing the fine glass powder with Pluoronic F-127 hydrogel. The acquired pastes were rheologically characterized and printed using a Robocasting device. DSC experiments were performed for base materials and the obtained green bodies. After sintering, SEM and XRD analyses were carried out in order to examine microstructure and the eventual presence of crystalline phase inclusions. Results confirmed that obtained inks exhibit stable rheological properties despite the propensity of glass to undergo hydrolysis and could be adjusted to desirable values for 3D printing. No additional phase was observed, supporting the suitability of the designed technology for the production of water sensitive glass inks. SEM micrographs of the sintered samples revealed the presence of closed porosity, which may be the main reason of light scattering.

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