scholarly journals A Novel Silicone Simulation Model for Microvascular Anastomosis

2021 ◽  
pp. 229255032110038
Author(s):  
Jessica M. Winter ◽  
Christian Petropolis
Keyword(s):  
Surgical Simulation ◽  
Low Cost ◽  
Inorganic Materials ◽  
Average Score ◽  
Microvascular Anastomosis ◽  
Metal Cylinder ◽  
3 Dimensional ◽  
Grasping And Manipulation ◽  
Adventitial Layer ◽  
Attending Physicians

Purpose: Surgical simulation of microvascular anastomosis has become increasingly popular. There are several living and silicone models available. Current silicone models fail to accurately reproduce a vessel’s loose adventitial layer, which may lead to the development of improper microsurgical technique. Our purpose is to create a realistic 3-dimensional microsurgical simulator that incorporates an adventitial vessel layer for higher fidelity manipulation of vessels. Methods: A microvascular anastomosis simulator was manufactured using metal moulds and inorganic materials. Synthetic tubing was created with a metal cylinder, 1.65 mm in diameter, painted with 2 sequential layers of silicon with a shore hardness of 2A. Silicone was allowed to fully cure in-between layers. Vessel adventitia was created with a 100-micron polyester mesh adhered to the silicone vessel exterior. Once dry, the synthetic tube is removed from the metal cylinder is then clipped to reveal the inner lumen. Both Resident and attending physicians evaluated the model with and without the adventitial layer and completed a questionnaire. Results: Grasping and manipulation of the vessel were scored on Average score 4.5 and 3 out of 5, with adventitia and without, respectively ( P = .00906). Usefulness as a teaching tool was scored on average 4.9 and 4.2, with adventitia and without, respectively ( P = .0232). The analysis included: simulation realism, educational utility, and overall satisfaction. Responses in all domains were favourable, suggesting the utility of this model. Conclusion: We created a realistic, high fidelity microvascular anastomosis simulator that is low cost and easily reproducible. Initial feedback is encouraging regarding realism, educational utility, and overall usefulness. Further validation is required to assess its effectiveness in resident education and skill transfer to the operating room.

Step-Specific Simulation: The Utility of 3D Printing for the Fabrication of a Low-Cost, Learning Needs-Based Rhinoplasty Simulator

2020 ◽  
Author(s):  
Dino Zammit ◽  
Tyler Safran ◽  
Nirros Ponnudurai ◽  
Mehrad Jaberi ◽  
Liang Chen ◽  
...  
Keyword(s):  
3D Printing ◽  
Surgical Simulation ◽  
Low Cost ◽  
Deliberate Practice ◽  
Learning Needs ◽  
3 Dimensional ◽  
Complex Procedure ◽  
Competency Based ◽  
3D Printed ◽  
Surgery Education

Abstract Background Rhinoplasty is a complex procedure that requires meticulous planning and precise execution. Plastic surgeons involved in teaching residents must balance a trainee’s hands-on experience while ensuring appropriate execution of difficult maneuvers. Surgical simulation, a field of growing importance with the shift towards competency-based education, may aid in trainee skill development. Through the concept of deliberate practice, the authors looked to explore the utility and economics of 3-dimensional (3D) printing technology to develop a step-specific rhinoplasty simulator. Objectives The main objective of this study was to address rhinoplasty skills previously identified as “learning areas of weakness” and develop a low-cost, step-specific simulator to help rhinoplasty teaching. Methods A patient’s facial bones, upper and lower lateral cartilages, and septum were segmented from a computed tomography scan and rendered in 3D format. This was 3D printed utilizing Ultimaker Polylactic filament with a polyvinyl acetate dissolvable support for bone, a mixture of Rigur 450 and Tango plus polyjet material for cartilage, and Smooth-On Dragon Skin for skin. Results A modular simulator was developed with 3 separate, interchangeable components with a perfect fit design. The simulator allowed for deliberate practice of the 5 rhinoplasty learning areas of weakness, with a maximal recurring cost of $75 CAD. Conclusions Through the employment of 3D printing, a low-cost, maneuver-specific rhinoplasty simulator reinforcing deliberate practice was developed. This concept of simulation-based deliberate practice may be of increasing interest when considering the implementation of competency-based curricular standards in plastic surgery education.

scholarly journals Virtual Functional Endoscopic Sinus Surgery Simulation with 3D-Printed Models for Mixed-Reality Nasal Endoscopy

2018 ◽  
Vol 159 (5) ◽  
pp. 933-937 ◽  
Author(s):  
Samuel R. Barber ◽  
Saurabh Jain ◽  
Young-Jun Son ◽  
Eugene H. Chang
Keyword(s):  
Visual Cues ◽  
Mixed Reality ◽  
Surgical Simulation ◽  
Tracking System ◽  
Low Cost ◽  
3D Models ◽  
Sinus Surgery ◽  
Surgery Simulation ◽  
3 Dimensional ◽  
3D Printed

The surgeon’s knowledge of a patient’s individual anatomy is critical in skull base surgery. Trainees and experienced surgeons can benefit from surgical simulation; however, current models are expensive and impractical for widespread use. In this study, we report a next-generation mixed-reality surgical simulator. We segmented critical anatomic structures for 3-dimensional (3D) models to develop a modular teaching tool. We then developed a navigation tracking system utilizing a 3D-printed endoscope as a trackable virtual-reality (VR) controller and validated the accuracy on VR and 3D-printed skull models within 1 cm. We combined VR and augmented-reality visual cues with our 3D physical model to simulate sinus endoscopy and highlight segmented structures in real time. This report provides evidence that a mixed-reality simulator combining VR and 3D-printed models is feasible and may prove useful as an educational tool that is low cost and customizable.

Low-Cost Heat Insulating Film Design for BIPV Modules Based on Multi-Layer Inorganic Materials

2012 ◽  
Vol 452-453 ◽  
pp. 1424-1428
Author(s):  
Han Min Tian ◽  
Li Jia Guo ◽  
Wen Feng Duan ◽  
Rui Xia Yang ◽  
Feng Lan Tian
Keyword(s):  
Refractive Index ◽  
Visible Light ◽  
Absorption Rate ◽  
Heat Insulation ◽  
Low Cost ◽  
Heat Rate ◽  
Optimum Combination ◽  
Inorganic Materials ◽  
Tempered Glass ◽  
Glass Panel

By analyzing the transmitionce and heat rate of insulating antireflection films conposed by refractive-index adjustable SiO2 layer and TiO2 layers, the optimum combination of antireflection films of BIPV is obtained. The absorption rate at the ultraviolet part that wavelenght excessive inadequate 400nm of the optimized fils is 99.9%, which are directly designed on the surface of the low iron tempered glass panel of BIPV, and in the wavelength range 400nm-800nm, the visible light transmitionce rate is up to 99.5%, and the heat that wavelenght excessive 800nm is reflected of 20%. For the multilayer heat insulation films are composed with the same kind of material while with different refractive indexes, there is no projecting stress between these films and no constraints during the production process of different films for the possible low cost heat insulating of BIPV.

scholarly journals Development of a High-Fidelity, 3D Printed Otoplasty Surgical Simulator

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Chelsey Wallace, M.S. ◽  
Zahra Nourmohammadi, Ph.D. ◽  
David A. Zopf, M.D., M.S.
Keyword(s):  
Surgical Simulation ◽  
Low Cost ◽  
Cost Effective ◽  
Occurrence Rate ◽  
Surgical Simulator ◽  
Risk Environment ◽  
Surgical Simulators ◽  
Protruding Ears ◽  
Surgical Trainees ◽  
Ear Cartilage

Background and Hypothesis: Protruding ears, also known as prominauris, are prevalent worldwide at an occurrence rate of about 5%. Children with prominauris report lower self-esteem and experience increased teasing and social isolation at school. From a functional standpoint, protruding ears can make wearing prescription glasses difficult. This increased stress and anxiety and impaired functionality lead children and families to seek treatment. One of the most effective treatments for protruding ears is otoplasty. This procedure involves an incision in the back of the ear and the placement of non-resorbable sutures to reform the ear. Alternatively, the procedure can be performed using an incisionless technique. As this is an elective procedure done commonly in children, adequate education of medical trainees is critical to ensure the proper level of skill is attained and patient satisfaction is maximized. Currently, teaching otoplasty is done with cadavers and supervised procedures with an attending. Surgical simulators are employed in the instruction of a variety of surgical procedures and allow residents to practice in a zero-risk environment. In addition, 3D printing has facilitated the development of surgical simulators allowing for a more cost-effective, consistent, and anatomically correct simulator. We developed an ear model made from silicone for trainees to practice traditional and incisionless otoplasty. Project Methods: The otoplasty surgical simulator was developed by isolating an ear from a computed-tomography scan in the Materialise software to create a 3D model. This model was then altered to create a negative mold. The mold was printed using fusion deposition printing with 1.75 MM polylactic acid filament. After printing, the mold was filled with Dragon Skin Silicone Shore 20 to simulate ear cartilage. The model was then coated in a layer of Dragon Skin Silicone Shore 10 to simulate a layer of skin. Conclusion and Potential Impact: This otoplasty simulator will next be validated by expert surgeons and then used in a surgical simulation workshop for surgical trainees. Because of the low-cost of the surgical simulator and the ease of manufacturing, this simulator can also be used to train surgeons abroad where access to surgical training may not be readily available. 

scholarly journals Cone-Beam Three-Dimensional Dental Volumetric Tomography in Dental Practice

2017 ◽  
Vol 7 (3) ◽  
pp. 62 ◽  
Author(s):  
Suzan Cangul ◽  
Ozkan Adiguzel
Keyword(s):  
Soft Tissues ◽  
Low Cost ◽  
Three Dimensional ◽  
Cone Beam ◽  
Imaging Method ◽  
Dental Practice ◽  
3 Dimensional ◽  
Scanning Time ◽  
Technological Advances ◽  
Native Speakers Of English

Imaging methods are of great importance for diagnosis and treatment in dentistry. With technological advances, great progress has been made in these methods. Over time, 3-dimensional (3-D) imaging has replaced 2-dimensional, thereby providing examination of objects in all directions. Of these methods, which play an important role in the clinical evaluation of patients, cone-beam computed tomography (CBCT) is the newest and most advanced imaging method. This method will revolutionize dental in comparison with conventional CT, it has several advantages, including a shorter scanning time, low radiation dose, low cost and the acquisition of high-resolution images. With 3-D imaging technology, this method has introduced the possibility of applying several procedures from diagnosis in the maxillofacial region to operative and surgical procedures. Although very clear results are not obtained from the imaging of soft tissues, the most important advantage of this technology is the capability of imaging hard and soft tissues together.   How to cite this article: Cangul S, Adiguzel O. Cone-Beam Three-Dimensional Dental Volumetric Tomography in Dental Practice. Int Dent Res 2017;7:62-70.  Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals Take-home Tensile Testing System for Biomechanics Education

2020 ◽  
Vol 1 (2) ◽  
Author(s):  
Matthew Leineweber
Keyword(s):  
Material Characterization ◽  
Tensile Testing ◽  
Low Cost ◽  
Effective Means ◽  
Student Groups ◽  
3 Dimensional ◽  
Industry Standard ◽  
Cellular Mechanotransduction ◽  
Grade Material ◽  
Take Home Labs

ABSTRACT Characterizing the load–deformation relationships in both engineering materials and biologic tissues is a key component of undergraduate biomechanics and mechanobiology courses. These relationships are essential to determining the suitability of a given material for biomedical applications, such as identifying the root causes of implant failure and injury and quantifying the effects of mechanical cellular mechanotransduction. Typically, material characterization is done by using industry standard and research-grade material testing systems, which can cost tens to hundreds of thousands of dollars and require large amounts of dedicated laboratory space. This article presents a new design for a low-cost and portable alternative to these commercial systems, consisting of off-the-shelf and 3-dimensional printed components for teaching purposes. Student groups assemble their own devices and conduct material characterization experiments for both elastic and viscoelastic materials on their own time, outside of traditional laboratory settings. The “take-home” labs were pilot tested over a single semester, and preliminary results showed increased understanding of elastic and viscoelastic theory compared with lecture alone. These results suggest that the take-home tensile testing systems may be an effective means of providing a hands-on educational experience in courses in which traditional lab activities are not otherwise possible.

Grasp Rehabilitator: A Mechatronic Approach

2019 ◽  
Author(s):  
Ashwin Raj Kumar ◽  
Seda Bilaloglu ◽  
Preeti Raghavan ◽  
Vikram Kapila
Keyword(s):  
Activities Of Daily Living ◽  
Daily Living ◽  
Low Cost ◽  
Force Measurements ◽  
Grasping And Manipulation ◽  
Research Grade ◽  
Lift Task ◽  
Fingertip Forces

Grasping and manipulation are critical for many activities of daily living. However, current approaches to grasp rehabilitation do not measure coordination of fingertip forces nor provide metrics for feedback to the user as an aid in regaining fingertip coordination. This paper presents a low-cost mechatronic approach to design and develop a portable and commercially viable grasp rehabilitation device. The performance of the newly developed grasp rehabilitator is compared with an existing research-grade grasping device on a grip and lift task. The results suggest that the newly developed grasp rehabilitator can provide key force measurements that are equivalent to the ones provided by the research-grade grasping device, indicating its validity and potential viability for rehabilitation.

scholarly journals LOW-COST SIMULATOR ASSEMBLY FOR 3-DIMENSIONAL VIDEOSURGERY TRAINING

2018 ◽  
Vol 31 (3) ◽  
Author(s):  
Carlos Magno Queiroz da CUNHA ◽  
Douglas Marques Ferreira de LIMA ◽  
Francisco Julimar Correia de MENEZES
Keyword(s):  
Low Cost ◽  
Three Dimensional ◽  
Skills Training ◽  
Surgical Skills ◽  
3D Video ◽  
Training Methods ◽  
3 Dimensional ◽  
Set Up ◽  
Undergraduate Programs ◽  
Advanced Courses

ABSTRACT Background: Three-dimensional videosurgery is already a reality worldwide. The trainee program for this procedure should be done initially and preferably in simulators. Aim: Assemble low-cost simulator for three-dimensional videosurgery training. Methods: The simulator presented here was mounted in two parts, base and glasses. After, several stations can be inserted into the simulator for skills training in videosurgery. Results: It was possible to set up three dimensional (3D) video simulations with low cost. It has proved to be easy to assemble and allows the training surgeon of various video surgical skills. Conclusion: This equipment may be used in undergraduate programs and advanced courses for residents and surgeons. The acrylic box allows the visualization of the task executed by the tutor and even by other experienced students.

scholarly journals Towards Low Cost and Low Temperature Capacitive CO2 Sensors Based on Amine Functionalized Silica Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1097 ◽  
Author(s):  
Jamila Boudaden ◽  
Armin Klumpp ◽  
Hanns-Erik Endres ◽  
Ignaz Eisele
Keyword(s):  
Silica Nanoparticles ◽  
Low Cost ◽  
Inorganic Materials ◽  
Organic Polymer ◽  
Impregnation Method ◽  
Inorganic Particles ◽  
Co2 Sensor ◽  
Sensing Material ◽  
Carbon Dioxide Co2 ◽  
Thermal Stability Of

Hybrid materials based on inorganic particles and an organic polymer were developed and used as an efficient sensing material for carbon dioxide (CO2). The sensing material consists of fumed silica that is functionalized with an organic polymer, polyethylenimine, by means of the impregnation method. The organic polymer is effectively immobilized around the silica nanoparticles and confirmed by infrared spectroscopy. Thermogravimetric analysis proves the thermal stability of the sensing material. CO2 capacitive sensors operating at temperatures lower than 70 °C were fabricated by depositing a thin layer of hybrid sensing material on interdigitated gold electrodes. Impedance spectroscopy explored the sensing capability of the hybrid organic–inorganic material towards CO2 in the presence of different relative humidity levels, as well as its stability and reversibility. This strategy to couple organic and inorganic materials as a sensing layer for CO2 paves the way for the design of a low-cost CO2 sensor.

Synthesis and Application of Manganese Oxide Based Nanomaterials

2013 ◽  
Vol 830 ◽  
pp. 33-36
Author(s):  
Su Jun Li
Keyword(s):  
Water Treatment ◽  
Manganese Oxide ◽  
Anode Materials ◽  
Manganese Oxides ◽  
Low Cost ◽  
Lithium Ion ◽  
Inorganic Materials ◽  
Structural Flexibility ◽  
Electrochemical Supercapacitors ◽  
High Theoretical Capacity

Manganese oxide is one of the most attractive inorganic materials because of its structural flexibility and wide applications in catalysis, ion exchange, electrochemical supercapacitors, molecular adsorption, biosensors, and so on. In recently, manganese oxides nanomaterials, including MnO, MnO2and Mn3O4, have attracted great interest as anode materials in lithium-ion batteries and water treatment due to their high theoretical capacity, environmental benignity, low cost, and special properties. Hence, manganese oxides nanostructures with excellent properties and various morphologies have been successfully synthesized. Herein, we provide a recent development of the synthesis of manganese oxides nanomaterials and their application.

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