A Surgical Simulator for Tympanostomy Tube Insertion Incorporating Capacitive Sensing Technology to Track Instrument Placement

2020 ◽  
Vol 162 (3) ◽  
pp. 343-345
Author(s):  
Vilija J. Vaitaitis ◽  
Michael E. Dunham ◽  
Yong-Chan Kwon ◽  
Wyatt C. Mayer ◽  
Adele K. Evans ◽  
...  
Keyword(s):  
External Auditory Canal ◽  
Computer Aided Design ◽  
Capacitive Sensor ◽  
Physical Models ◽  
Tympanostomy Tube ◽  
Tympanic Cavity ◽  
Tube Insertion ◽  
3 Dimensional ◽  
Sensing Technology ◽  
Aided Design

We describe a device engineered for realistic simulation of myringotomy and tympanostomy tube insertion that tracks instrument placement and objectively measures operator proficiency. A 3-dimensional computer model of the external ear and cartilaginous external auditory canal was created from a normal maxillofacial computed tomography scan, and models for the bony external auditory canal and tympanic cavity were created with computer-aided design software. Physical models were 3-dimensionally printed from the computer reconstructions. The external auditory canal and tympanic cavity surfaces were coated with conductive material and wired to a capacitive sensor interface. A programmable microcontroller with custom embedded software completed the system. Construct validation was completed by comparing the run times and total sensor contact times of otolaryngology faculty and residents.

scholarly journals A review of the Application of Additive Manufacturing in Endodontic access opening using SLM process

2020 ◽  
pp. 281-285
Author(s):  
Roydan Dsouza
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Dental Pulp ◽  
Computer Aided Design ◽  
Physical Models ◽  
3 Dimensional ◽  
Development Cycle ◽  
Computer Aided ◽  
Product Development Cycle ◽  
Aided Design

3D Printing refers to a class of technology that can automatically construct 3-dimensional physical models from Computer Aided Design (CAD) data. Reduction of product development cycle time is a major concern in industries for achieving competitive advantage. Endodontic dentistry is the dental specialty concerned with the study and treatment of the dental pulp, and generally diagnose tooth pain and perform root canal treatment and other procedures relating to the interior of the tooth. This article, therefore, aims on being an assistive methodology in endodontics by applying 3D printing in order to reduce the strain involved in the tooth restoration process.

A CAD System for Designers’ Decision Making: An Approach With 2D and 3D Integrated and Hierarchical Assembly Models

1991 ◽  
Author(s):  
S. Minami ◽  
T. Ishida ◽  
S. Yamamoto ◽  
K. Tomita ◽  
M. Odamura
Keyword(s):  
Decision Making ◽  
Computer Aided Design ◽  
Mechanical Design ◽  
Prototype System ◽  
Dimensional Model ◽  
3 Dimensional ◽  
Hierarchical Assembly ◽  
Cad System ◽  
Aided Design ◽  
2D And 3D

Abstract A concept for the initial stage of the mechanical design and its implementation in the computer-aided design (CAD) are presented. The process of decision making in design is: (1) determining an outline of the whole assembly using a 2-dimensional model that is easy to operate; (2) checking the outline using a 3-dimensional model in which it is easy to identify the spatial relationships; (3) determining details of its sub-assemblies or their components using the 2-dimensional model; and (4) checking the details using the 3-dimensional model. The CAD system must provide consistent relationships through all the steps. For that, following functions are implemented in our prototype system: (1) a 2D and 3D integrated model for consistency between 2- and 3-dimensional shapes, (2) a hierarchical assembly model with dimensional constraints for consistency within an assembly and their components, and (3) a check on constraints for consistency between shapes and designers’ intentions. As a result, the system can provide an environment well fitted to the designers’ decision making process.

Vision-force guided precise robotic assembly for 2.5D components in a semistructured environment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Boyoung Kim ◽  
Minyong Choi ◽  
Seung-Woo Son ◽  
Deokwon Yun ◽  
Sukjune Yoon
Keyword(s):  
Computer Aided Design ◽  
Degrees Of Freedom ◽  
Printed Circuit Board ◽  
Force Sensor ◽  
Circuit Board ◽  
Robotic Assembly ◽  
Ccd Cameras ◽  
Content Type ◽  
3 Dimensional ◽  
Aided Design

Purpose Many manufacturing sites require precision assembly. Particularly, similar to cell phones, assembly at the sub-mm scale is not easy, even for humans. In addition, the system should assemble each part with adequate force and avoid breaking the circuits with excessive force. The purpose of this study is to assemble high precision components with relatively reasonable vision devices compared to previous studies. Design/methodology/approach This paper presents a vision-force guided precise assembly system using a force sensor and two charge coupled device (CCD) cameras without an expensive 3-dimensional (3D) sensor or computer-aided design model. The system accurately estimates 6 degrees-of-freedom (DOF) poses from a 2D image in real time and assembles parts with the proper force. Findings In this experiment, three connectors are assembled on a printed circuit board. This system obtains high accuracy under 1 mm and 1 degree error, which shows that this system is effective. Originality/value This is a new method for sub-mm assembly using only two CCD cameras and one force sensor.

The Use of Computer-aided Design and 3-Dimensional Models in the Treatment of Forearm Malunions in Children

2015 ◽  
Vol 19 (1) ◽  
pp. 23-26 ◽  
Author(s):  
Dora A.R. Storelli ◽  
Andrea S. Bauer ◽  
Lisa L. Lattanza ◽  
H. Relton McCarroll
Keyword(s):  
Computer Aided Design ◽  
3 Dimensional ◽  
Computer Aided ◽  
Dimensional Models ◽  
Aided Design

scholarly journals Direct Printed Metal Devices - The Next Level of Computer-aided Design and Computer-aided Manufacturing Applications in the Orthodontic Care

2017 ◽  
Vol 7 ◽  
pp. 253-259 ◽  
Author(s):  
Simon Graf
Keyword(s):  
Computer Aided Design ◽  
Physical Models ◽  
Orthodontic Appliances ◽  
Know How ◽  
Metal Printing ◽  
Computer Aided ◽  
Cad Cam ◽  
3D Metal Printing ◽  
Manufacturing Applications ◽  
Aided Design

As the whole world gets more digital, so do we. This article provides a basic know-how for the CAD/CAM-workflow for metallic orthodontic appliances. Demonstrating step-by-step how to design the appliance on a digital cast and laser-melting (3D metal printing) it, till the final result, without any physical models.

scholarly journals Comparison of Intaglio Surface Trueness of Interim Dental Crowns Fabricated with SLA 3D Printing, DLP 3D Printing, and Milling Technologies

Healthcare ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 983
Author(s):  
Keunbada Son ◽  
Jung-Ho Lee ◽  
Kyu-Bok Lee
Keyword(s):  
3D Printing ◽  
Computer Aided Design ◽  
Reference Model ◽  
Digital Light Processing ◽  
3 Dimensional ◽  
Dental Crowns ◽  
Test Models ◽  
Significant Difference ◽  
Manufacturing Accuracy ◽  
Aided Design

This study aimed to evaluate the intaglio surface trueness of interim dental crowns fabricated with three 3-dimensional (3D) printing and milling technologies. Dental crown was designated and assigned as a computer-aided design (CAD) reference model (CRM). Interim dental crowns were fabricated based on CRM using two types of 3D printer technologies (stereolithography apparatus and digital light processing) and one type of milling machine (n = 15 per technology). The fabricated interim dental crowns were obtained via 3D modeling of the intaglio surface using a laboratory scanner and designated as CAD test models (CTMs). The alignment and 3D comparison of CRM and CTM were performed based on the intaglio surface using a 3D inspection software program (Geomagic Control X). Statistical analysis was validated using one-way analysis of variance and Tukey HSD test (α = 0.05). There were significant differences in intaglio surface trueness between the three different fabrication technologies, and high trueness values were observed in the milling group (p < 0.05). In the milling group, there was a significant difference in trueness according to the location of the intaglio surface (p < 0.001). In the manufacturing process of interim dental crowns, 3D printing technologies showed superior and uniform manufacturing accuracy than milling technology.

Enhancement of Design and Manufacturing Curriculum Through Rapid Prototyping Practices

2004 ◽  
Author(s):  
Ismail Fidan ◽  
Ken Patton
Keyword(s):  
Rapid Prototyping ◽  
Computer Aided Design ◽  
Physical Models ◽  
Web Based ◽  
Capstone Courses ◽  
Computer Aided ◽  
Design And Manufacturing ◽  
Cad Cam ◽  
Industrial Projects ◽  
Aided Design

Advances in computer technology opened new horizons in teaching Computer Aided Design (CAD) and Computer Aided Manufacturing (CAM) technologies. This paper will report the outcomes of two current NSF grants, 0311586 and 0302314, funded on Rapid Prototyping (RP) curriculum development. The objective of these RP projects is to provide advanced instruction and laboratory practices in the areas of CAD/CAM/CAE through challenging laboratory assignments and industrial projects that are integrated into any engineering curriculum. These projects create web-based materials, and also adapt and implement RP experiences and educational practices following successful similar models at various engineering schools to enhance pedagogy in design and manufacturing curriculum. Enhanced RP capabilities enable the students to build physical models directly from CAD data, where the prototype communicates important information about parts, including engineering data such as fit and limited functional testing, labeling, highlighting, and appearance simulation. Developed RP labs are used in junior and senior level design and manufacturing courses, including the senior capstone courses.

Immediate Post-Operative Reconstruction of Calvarial Bone by Cranioplasty Prosthesis in Calvarial Bone Fibrous Dysplasia

2019 ◽  
Vol 10 (2) ◽  
pp. 174-178
Author(s):  
Shaiq Gajdhar ◽  
Sajda Khan Gajdhar
Keyword(s):  
Fibrous Dysplasia ◽  
Computer Aided Design ◽  
Surgical Excision ◽  
Calvarial Bone ◽  
3 Dimensional ◽  
Cranial Defect ◽  
Post Operative Period ◽  
Operative Reconstruction ◽  
Computer Aided ◽  
Aided Design

Objectives: Immediate post-operative reconstruction of calvarial bone by cranioplasty prosthesis in calvarial bone fibrous dysplasia. An easy and economical method for reconstruction of the defect. Methods: Surgical excision of right parietal cranial space occupied lesion was performed followed by fabrication of immediate postoperative period cranioplasty prosthesis by using clear heat polymerized polymethylmethacrylate. Results: The cranial defect created during excision of calvarial bone fibrous dysplasia was immediately replaced by cranioplasty prosthesis which was fabricated in the immediate post-operative period using heat polymethylmethacrylate. Conclusions: Polymethylmethacrylate is a very reliable thermoplastic material that can be prefabricated or even placed immediately after post-operative period to produce a suitable prosthesis. Polymethylmethacrylate implants have been outmoded by computer-aided design and computer-aided manufacturing and newer 3-dimensional printed implants, but these newer methods are accompanied by higher expenses and timing issues.

Virtual facial simulation of prosthetic outcome for static computer-aided implant surgery and CAD-CAM prostheses

2021 ◽  
Author(s):  
Bryan T Harris ◽  
Chao-Chieh Yang ◽  
Dean Morton ◽  
Wei-Shao Lin
Keyword(s):  
Computer Aided Design ◽  
Virtual Patient ◽  
Clinical Report ◽  
Computer Aided Manufacturing ◽  
Implant Surgery ◽  
3 Dimensional ◽  
Computer Aided ◽  
Cad Cam ◽  
Pre Treatment ◽  
Aided Design

This clinical report describes a digital process of using a 3-dimensional (3D) virtual patient at an exaggerated smile view for the pre-treatment simulation of the prosthetic outcome. In addition, the virtual patient can be used to assist with the formulation of a prosthetically - driven surgical plan for static computer-aided implant surgery (s-CAIS) and the design of the computer-aided design and computer-aided manufacturing (CAD-CAM) prostheses.

PROSTHETIC EAR RECONSTRUCTION APPLYING COMPUTER TOMOGRAPHIC (CT) DATA AND ADDITIVE MANUFACTURING TECHNOLOGIES

2015 ◽  
Vol 76 (7) ◽  
Author(s):  
Nor Azura Mohamed ◽  
Zainul Ahmad Rajion
Keyword(s):  
Additive Manufacturing ◽  
Medical Imaging ◽  
Computer Aided Design ◽  
Physical Models ◽  
Ear Reconstruction ◽  
New Approach ◽  
Imaging Technology ◽  
Wax Pattern ◽  
Computer Aided ◽  
Aided Design

The treatment of auricle defect can be by surgical or prosthetic ear rehabilitation depending on the condition.  Current practice by surgeon for prosthetic ear rehabilitation require patient to go for osseointegrated craniofacial implant surgery for retention of the prosthetic ear.  Impression technique play a vital role in accurate reproduction of affected and unaffected ears, orientation of the ear during wax try in and fabrication of ear prostheses. Traditionally, the wax pattern was created from the impression taken from patient and the final prosthesis is processed with silicone material.  This conventional method has always been time consuming, massive work and caused discomfort to patient.  Moreover the accuracy of the final prosthetic sometimes was not satisfied. Improvement in medical imaging technology whereby data from computerized tomography (CT) in 2D format can be converting to 3 dimensional images gave tremendous view for surgeon to visualize the result.  A new and impressive advance in the development of additive manufacturing technology is now being able to be applied in medical field.  The widespread use of computer-aided design (CAD) combine with computer aided manufacturing (CAM) produced the momentum and desire to translate the 3-D images into physical models. Studies and research have indicated the viability of using medical imaging technology, computer aided design (CAD) and additive manufacturing techniques in prosthetics.  This paper proposed a novel method of fabricating the prosthetic ear applying mirror image technique to reconstruct the missing ear, and then fabricate the 3D model of the prosthetic ear using Stereolitography (SLA) technology that will become the master mold to produce the final prosthetic ear.  This method eliminates the traditional wax pattern procedure. A clinical study is done onto a patient in HUSM and comparison is made between traditional method vs new approach using computer aided technology.  Result showed that there is significant different between traditional and new approach design.  The new method also shows time reduction during design and fabrication stage.  

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