Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Development of optimum preplanning for maxillofacial surgery using selective laser sintering
L Siva Rama Krishna, MP Bal Reddy, S Venkatesh
International Journal of Engineering, Science and Technology , 2011,
Abstract: Rapid prototyping is a technology that can automatically construct physical models from CAD data. It helps designers to quickly create tangible prototype of their design. This technology has numerous applications; they make excellent visual aids for communicating ideas to the customers. It plays an important role in producing complex and intricate models in both engineering and medical applications. This paper presents its application in medical field. It discusses the development of optimum preplanning for maxillofacial surgery using selective laser sintering process. It involves identifying the optimum value of various parameters like threshold value, gantry tilt angle, resolution, layer thickness and interval thickness of CT scan image. The 3D model of the CT scan image is developed and converted into .stl file. The 3D model is produced on Selective Laser Sintering machine by considering shrinkage and compensation allowances. Two case studies are presented and comparison is made with regard to time taken for surgery using RP model and without using RP model. This helps in reducing time and increase precision, as well as to decrease morbidity for maxillofacial surgery, thus resulting in less suffering to patient , thereby reducing costs and length of hospitalization and improving quality of life.
Accuracy of Rapid Prototyping Biomodels Plotted by Three Dimensional Printing Technique: Ex Vivo Study  [PDF]
Lucio Costa Safira, Luana Costa Bastos, Valter Estev?o Beal, Roberto Almeida de Azevedo, Carlos Eduardo Francischone, Viviane Almeida Sarmento
Advances in Computed Tomography (ACT) , 2013, DOI: 10.4236/act.2013.22008
Abstract: The rapid prototyping biomodels manufacturing is a recent technology with great importance in oral and maxillofacial surgery. It provides a better surgical planning, decrease of anesthesia time and great functional and esthetic results. The aim of this experimental study was to evaluate the accuracy of rapid prototyping biomodels built by three-dimensional printing (3DP) technique, since this is one of the least expensive methods available. Linear measurements of standardized bone defects and anatomic distances were compared using a digital caliper of high precision in nine dry mandibles (gold standard) and their respective biomodels. The Bland-Altman test was used for statistical analysis (5% level of significance). The results showed strong concordance between the dry mandibles and their respective biomodels, with discrepancies smaller than 2 mmin most cases (97.4%). We can conclude that the biomodels built by 3DP technique can be used for surgical planning in Dentistry.
Historical outline of oncologic surgery in the maxillofacial area  [PDF]
Christos MARTIS
Hellenic Archives of Oral and Maxillofacial Surgery , 2012,
Abstract: SUMMARY: The Father of Maxillofacial Surgery is General Surgery and not Oral Surgery, as it may seem from a clinical point of view. General Surgery was the precursor of the specialty of Maxillofacial Surgery since the era of the Hippocratics and up to the end of the 18th century and the begining of the 19th century, having as pioneers eminent general surgeons, such as Heister, von Graefe, C. Langenbeck, Syme, Dupuytren,Roux, Chassaignak, Hulihen, Mott, Billroth, B. Langen -beck, Kocher, Macewen, Albert, Broca, and others.The range of action of the a forementioned surgeons included mostly (in 80% of the cases) surgical procedures in the maxillofacial area, mainly in the fields of Traumatology (facial fractures), Osteoplasty, reconstructive surgery (cleft lip and cleft palate operations),and the treatment of tumors.In the present article the historical elements connected with the roots of Oncologic Surgery in the maxillofacial area are outlined, an activity developed by the general surgeons of these eras, which are at the same time the pioneers of modern Maxillofacial Surgery.
Application of 3D printing in oral and maxillofacial surgery education

- , 2018, DOI: 10.7518/gjkq.2018.01.023
Abstract: 摘要: 3D打印技术作为一种快速成型技术,正迅速发展,已在口腔颌面外科临床领域广泛应用,其在教学中的应用亦不容忽视。3D打印模型作为新的教学手段在未来的教学实践中将发挥越来越重要的作用,甚至颠覆传统的教学模式。本文就3D打印技术在口腔颌面外科实验教学中的应用作一综述。
Abstract: 3D printing technique, a rapid prototyping technique, which is developing fast, has already been used in oral and maxillofacial clinical surgery. At the same time, 3D printing model is playing a more and more important role in the education field. This review focuses on the application of 3D printing to oral and maxillofacial surgery education.
Automated Tools for Rapid Prototyping
计算机科学技术学报 , 1991,
Abstract: An automated environment is presented which aids the software engineers in developing data processing systems by using rapid prototyping techniques.The environment is being developed on VAX station.It can render good support to the specification of the requirements and the rapid creation of prototype.The goal,the methodology,the general structure of the environment and two sub-systems are discussed.
Computer-aided planning for zygomatic bone reconstruction in maxillofacial traumatology  [PDF]
Sylvain Maubleu,Christophe Marecaux,Matthieu Chabanas,Yohan Payan,Franck Boutault
Physics , 2006,
Abstract: An optimal planning procedure has been proposed to define the target position of the zygomatic bone following a fracture of the mid-face skeleton. The protocol has been successfully tested on healthy subjects, and ensures the global symmetry of the face could be obtained after the reconstruction surgery. Now that the planning procedure is available, the next step of this project will be to develop an intra-operative guiding system to help the surgeon to follow the planning. This procedure will mainly rely on the intra-operative registration of the zygomatic bone fragment, and the design of specific surgical ancillaries for cranio-maxillofacial surgery.
Vineet Kumar Vashishtha,,Rahul Makade,,Neeraj Mehla
International Journal of Engineering Science and Technology , 2011,
Abstract: Rapid prototyping technology have emerged a new innovation to reduced the time cost of moulds fabrication by creating 3D product directly from computer aided design thus the designer is able to perform design validation and accuracy analysis easily in a virtual environment as if using a physical model. The primary aim of this paper is to give the reader an overview of the current state of the art in rapid prototyping technology .The paper also deal with feature’s of rapid prototyping in Aerospace industry and some of the existing problem’s of rapid rototyping.
Virtual Assembly Rapid Prototyping of Near Net Shapes
Lim, Theodore;Medellin, Hugo;Sung, Raymond;Ritchie, James;Corney, Jonathan;
Ingeniería mecánica, tecnología y desarrollo , 2009,
Abstract: virtual reality (vr) provides another dimension to many engineering applications. its immersive and interactive nature allows an intuitive approach to study both cognitive activities and performance evaluation. market competitiveness means having products meet form, fit and function quickly. rapid prototyping and manufacturing (rp&m) technologies are increasingly being applied to produce functional prototypes and the direct manufacturing of small components. despite its flexibility, these systems have common drawbacks such as slow build rates, a limited number of build axes (typically one) and the need for post processing. this paper presents a virtual assembly rapid prototyping (varp) project which involves evaluating cognitive activities in assembly tasks based on the adoption of immersive virtual reality along with a novel non-layered rapid prototyping for near net shape (nns) manufacturing of components. it is envisaged that this integrated project will facilitate a better understanding of design for manufacture and assembly by utilising equivalent scale digital and physical prototyping in one rapid prototyping system. the state of the art of the varp project is also presented in this paper.
Rapid prototyping for sling design optimization  [PDF]
Nermina Zaimovic-Uzunovic,Samir Lemes,Damir Curic,Alan Topcic
Computer Science , 2014,
Abstract: This paper deals with combination of two modern engineering methods in order to optimise the shape of a representative casting product. The product being analysed is a sling, which is used to attach pulling rope in timber transportation. The first step was 3D modelling and static stress/strain analysis using CAD/CAE software NX4. The slinger shape optimization was performed using Traction method, by means of software Optishape-TS. To define constraints for shape optimization, FEA software FEMAP was used. The mould pattern with optimized 3D shape was then prepared using Fused Deposition Modelling (FDM) Rapid prototyping method. The sling mass decreased by 20%, while signifficantly better stress distribution was achieved, with maximum stress 3.5 times less than initial value. The future researches should use 3D scanning technology in order to provide more accurate 3D model of initial part. Results of this research can be used by toolmakers in order to engage FEA/RP technology to design and manufacture lighter products with acceptable stress distribution.
An investigation on distraction osteogenesis in maxillofacial surgery
Fariaby J
Journal of Dental Medicine , 2003,
Abstract: Distraction osteogenesis (DO), firstly introduced to the medical world by Russian scientist Ilizarov"nfor long bone lenghtening in orthopedics can be considered as an appropriate substitute in the treatment of"nmaxillofacial deformities. Natural events occuring during the repair of a fractured bone segment not only lead"nto the desired bone length but also prevent from the undesired disadvantages of osteotomies and bone"ngrafting. Recently a lot of investigations have been conducted to evaluate the efficacy of DO in the treatment"nof maxillofacial deformities, which in some cases have lead to successful results. In the present article a lot of"nissues in maxillofacial surgery and different treatment goals associated with DO are discussed.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.