Cad Cam Research Papers - Academia.edu (original) (raw)

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- Dentistry, Prosthodontics, Computer Aided Design, Printing
- by Erik Arnold
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- Computer Aided Engineering, Politics, CAD, Implementation
- by Swee Mok
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- Engineering, Computer Science, Production, Product Design
- by Othman Abdullah
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- Dentistry, Nonparametric Statistics, Computer Aided Design, Dental Implantology
- by David Kahaner
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- Production, Product Design, Automatic Control, Computer Hardware
- by teresa de martino
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- Shape Modeling, Concurrent Engineering, Computer Aided Design, Product Design
- by Dov Dori
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- Pattern Recognition, Computer Aided Design, Engineering Design, Interpretation

The purpose of this study was to compare the retention of circlet (E) clasps and back-action clasps against three abutment surface materials during long-term simulation of attachment and detachment. Forty-eight test models were constructed by placing premolars (natural abutments or metal dies) inside metal blocks to test different abutment retention surface materials (sound enamel, composite resin, and glass-ceramic; 16 each). The models were duplicated into investment models for construction of circlet (E) and back-action clasps. Removal and insertion cycling of clasps was carried out for 250, 500, 1000, 2000, 4000, 8000, and 16,000 cycles. The retention of each clasp was measured before cycling and after each interval. Data were analyzed using 1-way-ANOVA, 2-way-ANOVA, and Mann-Whitney U tests. No significant differences in retention of either clasp were found between the three abutment material surfaces; however, there was a significant decrease in retention force of the circlet (E) clasp between 1000 and 2000 cycles but not of the back-action clasp. (1) The back-action clasp maintains its retention force for a longer period than the circlet (E) clasp. (2) Composite resin contouring of teeth provided retention comparable to enamel and a ceramic material.

- by Osama Baraka
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- Materials Science, Dentistry, Prosthodontics, Dental Research

To evaluate the clinical performance of glass-ceramic/zirconia crowns fabricated using intraoral digital impressions - a retrospective study with a three-year follow-up. 70 consecutive patients with a total of 86 glass-ceramic/zirconia crowns were treated by a single clinician using standardized clinical and laboratory protocols. A complete digital workflow was adopted for the purpose except for the veneering procedure for the glass-ceramic crowns. Occlusal adjustments were made before the ceramic glazing procedure. Before cementation, all abutments where carefully cleaned with a 70% alcoholic solution and air dried. Cementation was performed using dual-curing, self-adhesive resin cement. Patients were re-examined after 12, 24 and 36 months, to assess crown chipping/fractures. After the three-year follow-up, none of the zirconia-based restoration was lost ("apparent" survival rate 100%) otherwise, the chipping rate of the veneering material increased from 9.3% after 12 mon...

- by Enrico Gherlone
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- Dentistry, Fracture, Cad Cam
- by Florian Beuer
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- Engineering, Dentistry, Biomedical Engineering, Computer Aided Design
- by Leonardo Ciocca
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- Radiology, Computer Aided Design, Nuclear medicine, Digital imaging
- by Maki Habib
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- Engineering, Cad Cam

In this article, machining characteristics of titanium alloy grade-5 (Ti–6Al–4V) have been examined at different cutting speeds, feed rates and approaching angles under dry condition. It has been observed that with the increase in cutting speeds, the magnitude of cutting forces and tool tip temperature increase. If both cutting force and temperature level were considered together, the optimum approaching angle works out to be 45° and 90° for 49.5 and 76.7 m/min, respectively. For 116.9 m/min increase of cutting forces at 60° approaching angle can be attributed to low-shear angle which is function of the average chip thickness. Positive rake angle produces higher shear angle which leads to the reduction of cutting forces, tool tip temperature and thus help obtaining a better surface finish. Surface roughness measurements obtained prior and subsequent to the machining of titanium alloy (Ti–6Al–4V) were used to characterize the change in roughness caused by variation in machining parameters like cutting speed, feed rate and approaching angle. The average surface roughness is observed to be maximum at 0.11 mm/min and minimum at 0.04 mm/min feed rate for all approaching angles.

- by Arunil Sharma
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- Engineering, Robotics, Aerospace Engineering, Materials Science

ABSTRACT Automobile sector is one of the most blooming sectors now-a-days. With the advent of computer assisted engineering and the blend of classic methodologies combined together to bring the most durable result about pre-manufacturing analysis and design optimization. This paper presents an overview of the role of Computer Assisted Engineering in the Design and Simulation of a Formula Vehicle.

- by Srijan Manish
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- Engineering, Mechanical Engineering, Civil Engineering, Safety Engineering
- by Daniel Whitney
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- Mathematics, Motion Analysis, Kinematics, Rigid Body Motion
- by M. Bonfe
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- Mechanical Engineering, Computer Aided Engineering, Modeling Language, Complex System
- by Burcin Cem Arabacioglu
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- Education, Design, Design education, Interior Design
- by Donald Riley
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- Computer Graphics, Dentistry, Biomedical Engineering, Computer Aided Manufacturing
- by Kihong Ku and +1
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- Control, Complexity, Collaborative Design, Information

The interest of dental research in metal-free restorations has been rising in the last 20 years following the introduction of innovative all-ceramic materials in the daily practice. In particular, high strength ceramics and related CAD/CAM techniques have widely increased the clinical indications of metal-free prostheses, showing more favourable mechanical characteristics compared to the early ceramic materials.The purpose of the present paper is providing a brief review on the all-ceramic dental materials, evaluating pros and cons in the light of the most recent scientific results and of the authors’ clinical experience.A structured review of the literature was given on the basis of medical and engineering papers published in the last decades on the use of dental ceramics and zirconia in particular. The experimental and clinical findings of the most relevant researches were reported.Zirconia is one of the most promising restorative materials, because it yields very favourable mechanical properties and reasonable esthetic. Several in vitro and in vivo investigations reported suitable strength and mechanical performances of zirconia, compatible with clinical serviceability as a framework material for both single crowns and short-span fixed partial dentures. However, clinical results are not comparable, at the moment, with conventional metal–ceramic restorations, neither is there sufficient long-term data for validating the clinical potential of zirconia in the long run.The use of zirconia frameworks for long-span fixed partial dentures or for implant-supported restorations is currently under evaluation and further in vivo, long-term clinical studies will be needed to provide scientific evidence for drawing solid guidelines.

- by simona russo
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- Engineering, Dental Materials, Esthetics, Ceramics
- by Alessandro Pozzi and +1
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- Dentistry, Zirconia, Cad Cam
- by Simona Russo
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- Engineering, Dental Materials, Esthetics, Ceramics
- by Mladen Perinic
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- Engineering, Cad Cam
- by Vimal Dhokia
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- Engineering, Rheumatoid Arthritis, Composite Material, Carbon fibre
- by Florian Beuer
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- Engineering, Computer Aided Design, Dental Materials, Humans
- by Christian Stappert
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- Dentistry, Computer Aided Design, Prospective studies, Humans

The University of Georgia Department of Computer Science 415 Graduate Studies Research Center.

- by Abdelmajid BENAMARA
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- Philosophy, Integration, Cad Cam
- by Guillermo Pradíes
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- Dentistry, Zirconia, Cad Cam
- by Daniel Bacigalupe
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- Cad Cam
- by Leonardo Ciocca
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- Nursing, Computer Aided Design, Case Report, Humans
- by Anil Jain
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- Information Systems, Computer Vision, Information Extraction, Object Recognition
- by Liliana Indrie
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- Computer Graphics, Fashion design, Embroidery, Sacred Geometry
- by Aleksandar Todorovic
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- Dentistry, Computer Aided Design, Cad Cam
- by Andrew Kusiak
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- Expert Systems, Clustering Algorithms, Knowledge Based System, Optimization
- by Florian Beuer
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- Dentistry, Computer Aided Design, Computer Aided Manufacturing, Survival Analysis

El presente artículo propone una metodología para el diseño y la fabricación de implantes craneales a partir de imágenes DICOM y tecnologías CAD/CAM/CNC. Esta metodología parte de las Tomografías Axiales Computarizadas (TAC) de la cabeza del paciente, con las cuales se lleva a cabo la reconstrucción tridimensional del cráneo. Luego, en el sistema CAD se reconstruye el implante variando la técnica empleada dependiendo de la región del cráneo con defecto o trauma. Una vez obtenido el modelo, se diseña el montaje y se fabrica el implante con soporte en tecnología CAM/CNC. MSC: 68Nxx, 68U07

- by steve jackson
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- Documentation, Causal reasoning, Computer Aided Design, Software Architecture
- by Dov Dori
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- Engineering, Software Engineering, AES, Time Complexity
- by Joerg Strub
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- Dentistry, Computer Aided Design, Prospective studies, Humans

On June 2014, the United Arab Emirates inaugurated its first architectural pavilion at the 14th Venice International Architecture Biennale. The pavilion chartered the impact of modernist architecture in the UAE and provided a charting of the history of architecture in the UAE for the past 100 years. The exhibition took the form of an archive but was never seeing as a finished collection, but as the beginning of a future architectural collection. Part of the problem encountered during the gathering of the data, was the lack available and accessible information related to modern heritage buildings partly due to the rapid development of the nation. Modern Heritage in the UAE is defined the period after ‘Etihad’ or ‘union’ of the UAE as a nation in 1971. These buildings are from a period ranging from the early 1970’s and early 1990’s and they play an integral role of bringing ‘modernity’ to the UAE and in the forming of the three main cities, Abu Dhabi, Dubai and Sharjah as modern late 20th century metropolis. Two strategies were developed during the data gathering leading to the Biennale; 1 To photograph specific buildings that played an important role to the development of the nation for the purpose of the National Pavilion exhibition at the Biennale. 2 To continue the exercise of photographing other buildings that are not often recognized as higher profile, but still play an important role in forming the urban fabric of Emirati cities. Methods were developed using the photographs for documenting by making elevation drawings and models of the facades. The second strategy is of outmost importance as the UAE, like other modernizing nations, is constantly undergoing rapid redevelopment of its cities, therefore many of these buildings are rapidly being demolished to make way for the newly built.

- by Marco Sosa
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- Design, Architecture, Photography, Research Methodology
- by Thomas Caudell
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- Computer Graphics, Augmented Reality, Virtual Reality, Prototyping
- by Weihang Zhu
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- Mechanical Engineering, Computer Aided Design, Path planning, Virtual Prototyping

- by Lina Ahmad
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- Design, Architecture, Photography, Research Methodology

This paper examines the collaborative practice between an analogue and a digital craft practitioner. It aims to illuminate ways in which digital tools can be used to translate handcrafted objects in collaborative craft practice and to address the following questions: 1) What forms of knowing and meaning making evolve in collaborative research through design practice? 2) What does it mean to explore material in Computer Aided Design (CAD) through Virtual Reality (VR)? Originating with a hand-knotted artifact, the study begins with the transformation of an analogue form into digital format using a range of techniques. These activities act as both a review of digital fabrication capabilities and an exploration of new thinking mechanisms offered by this emerging hybrid practice. The study broadens our understanding of the maker’s role within the capabilities and limitations of digital tools. Each iteration of digitally-fabricated objects was documented and reflected upon. This collabora...

- by Nithikul Nimkulrat
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- Digital Fabrication, Collaboration, Hybridization, Craft Knowledge
- by David Gratton
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- Dentistry, Prosthodontics, Computer Aided Design, Titanium

Ceramics are widely used as indirect restorative materials in dentistry because of their high biocompatibility and pleasing aesthetics. The objective is to review the state of the arts of CAD/CAM all-ceramic biomaterials. CAD/CAM all-ceramic biomaterials are highlighted and a subsequent literature search was conducted for the relevant subjects using PubMed followed by manual search. Developments in CAD/CAM technology have catalyzed researches in all-ceramic biomaterials and their applications. Feldspathic glass ceramic and glass infiltrated ceramic can be fabricated by traditional laboratory methods or CAD/CAM. The advent of polycrystalline ceramics is a direct result of CAD/CAM technology without which the fabrication would not have been possible. The clinical uses of these ceramics have met with variable clinical success. Multiple options are now available to the clinicians for the fabrication of aesthetic all ceramic restorations.

- by Jukka Matinlinna
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- Computer Aided Design, Glass, Crystallization, Dental Materials