Abrasive Technology in Ceramic Restorative Dentistry

2009 ◽  
Vol 76-78 ◽  
pp. 363-366
Author(s):  
Ling Yin
Keyword(s):  
High Efficiency ◽  
Modern Society ◽  
The Elderly ◽  
Restorative Dentistry ◽  
Ancient Technology ◽  
All Ceramic ◽  
Cad Cam ◽  
Catastrophic Fracture ◽  
Ceramic Restorations ◽  
Cam Systems

The application of abrasive technology in dentistry dates from 7000–9000 years. How does this ancient technology affect our modern society where the elderly population needs extensive dental care and ageing well and ageing productively is our first priority? Many patients prefer tooth-colored, all ceramics restorations fabricated by dental CAD/CAM systems for reasons of esthetics, biocompatibility and high efficiency. In spite of the advantages of all-ceramic restorations, ceramic prostheses have not always performed as predicted or desired. Catastrophic fracture has been the most frequently reported reason for failure of all-ceramic restorations. This paper gives a brief review on abrasive technology in ceramic restorative dentistry to highlight problems to be solved by our abrasive technology community.

scholarly journals Retreatment of 6 Ceramic Restorations In A Single Session - The Application of Er:YAG Laser And CAD/CAM Technology: An 1 Year Follow Up Clinical Evaluation

2021 ◽  
Vol 24 (2) ◽  
Author(s):  
Christian Giancarlo Bernal ◽  
Ester Mi Ryoung Lee ◽  
Carlos De Paula Eduardo ◽  
Ana Maria Aparecida Souza ◽  
Luciane Hiramatsu Azevedo
Keyword(s):  
High Speed ◽  
Er:Yag Laser ◽  
Single Session ◽  
High Power Lasers ◽  
Yag Laser ◽  
Anesthetic Agents ◽  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Restorations

Background: To present the benefits of high power lasers (Er: YAG and Nd: YAG) over the use of the high speed turbine for the extraction of ceramics restorations, without damaging the surfaces of the teeth; being a relatively easier and faster procedure without the use of anesthetic agents, and the preparation of the ceramic restorations and cementing in the single session; with a follow-up of 1 year. Objective: The benefits of lasers over high-speed turbine mechanical instrumentation for crown removal encompass efficient restoration recovery without damage to tooth surfaces; and a relatively easier and faster procedure without the use of anesthetic agents. Methods: The Er: YAG laser (no contact; 3.2-4.0 W, 20 Hz) was used to extract the porcelain prosthesis, followed by a gingivectomy with the Nd: YAG laser on tooth 12 to improve the gingival contour. The dental surfaces where the ceramic prosthesis will be cemented were scanned. Then, CAD / CAM technology was used to make the ceramic veneers that were cemented in the same session. Results: The efficacy the Er:YAG laser energy was observed by the decreased of the time to remove all-ceramic materials through ablation of bonding cements, reducing working time by 75% compared to a high-speed turbine. Conclusions: An Er: YAG laser can safely remove lithium disilicate crowns with the settings used in this study. Laser-assisted removal of all ceramic PDFs is a promising treatment protocol. The use of the Nd: YAG (2.0 W power, short 20Hz, 320 µm optical fiber, in contact) laser allowed gingivoplasty to be performed, automatically cauterizing avoiding post-operative bleeding, and facilitating the preparation of ceramic restorations the same day. The use of high-power lasers and the use of accompanying CAD / CAM technology allowed this clinical case to be completed in a single visit without the use of temporary restorations, achieving absolute patient satisfaction.   Keywords Er:YAG; Nd:YAG; Lithium disilicate ceramic; CAD/CAM.

Accuracy of ceramic restorations made with two CAD/CAM systems

2013 ◽  
Vol 109 (2) ◽  
pp. 83-87 ◽  
Author(s):  
Tamer A. Hamza ◽  
Hesham A. Ezzat ◽  
Mohamed Mahmoud Khalil El-Hossary ◽  
Hesham Abd El Megid Katamish ◽  
Tamer E. Shokry ◽  
...  
Keyword(s):  
Cad Cam ◽  
Ceramic Restorations ◽  
Cam Systems

Marginal Fit of Heat-pressed vs CAD/CAM Processed All-ceramic Onlays Using a Milling Unit Prototype

2008 ◽  
Vol 33 (6) ◽  
pp. 644-650 ◽  
Author(s):  
S. Reich ◽  
S. Gozdowski ◽  
L. Trentzsch ◽  
R. Frankenberger ◽  
U. Lohbauer
Keyword(s):  
Clinical Relevance ◽  
Clinical Performance ◽  
Important Influence ◽  
Marginal Gap ◽  
Marginal Fit ◽  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Restorations

Clinical Relevance The marginal fit of all-ceramic restorations has an important influence on the clinical performance and lifetime of adhesively luted restorations. In proximal boxes, an average marginal gap of less than 100 μm is claimed. These clinical requirements are fulfilled by both processing procedures.

scholarly journals Fracture Rates and Lifetime Estimations of CAD/CAM All-ceramic Restorations

2015 ◽  
Vol 95 (1) ◽  
pp. 67-73 ◽  
Author(s):  
R. Belli ◽  
A. Petschelt ◽  
B. Hofner ◽  
J. Hajtó ◽  
S.S. Scherrer ◽  
...  
Keyword(s):  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Restorations

scholarly journals Achieving the Desired Esthetic with Current CAD-CAM Ceramics

2017 ◽  
Vol 1 (2) ◽  
Keyword(s):  
Optical Properties ◽  
Dental Tissue ◽  
Reflection And Transmission ◽  
Anterior Teeth ◽  
All Ceramic ◽  
Cad Cam ◽  
Natural Teeth ◽  
Experienced Operator ◽  
Shade Matching ◽  
Cam Systems

The demand for tooth-colored restorations has grown considerably during the last decades. Restoration of anterior teeth is a difficult task, even for an experienced operator. Color is the most important determinant of esthetics. The esthetic appearance of a restoration should match the surrounding dental tissue. This requires that the optical properties of the restorative material be similar to that of the natural teeth. Thus, for an acceptable esthetic result, favorable shade matching of the all-ceramic restoration should be achieved by controlling light absorption, reflection and transmission of the ceramic material. There are many different ceramic systems that can be used to achieve highly esthetic results. These ceramic systems include In-Ceram, Hi-Ceram, IPS-Empress, Optec, and CAD-CAM ceramics. All ceramic systems have different composition, microstructure, crystalline content and phases. Direct transmission, translucency, opacity and opalescence, all influence the optical properties of the ceramic restoration. Other factors include the thickness of porcelain, number of porcelain firing, glazing, porcelain powder/liquid ratio, surface texture and even the resin shade. This article focuses on controlling these variables to achieve the best possible esthetic result with an all ceramic system with the emphasis on CAD-CAM systems.

Zirconia Blocks Properties Used for CAD/CAM Dentistry Restorations

2012 ◽  
Vol 727-728 ◽  
pp. 804-808 ◽  
Author(s):  
C. Santos ◽  
Carlos Nelson Elias ◽  
Andréa Matos Melo ◽  
Sérgio Neves Monteiro
Keyword(s):  
Mechanical Properties ◽  
Fracture Resistance ◽  
X Ray Diffraction ◽  
X Ray ◽  
M 10 ◽  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Blocks ◽  
Bending Fracture ◽  
Cam Systems

Several CAD/CAM systems are available to dental prosthesis laboratories that can be used to make all-ceramic copings and frameworks. In Brazil, the use of these systems presents low demand, due principally the high blocks ceramics cost used for theses systems. The ceramic blocks are imported. To increase the dental ceramic CAD/CAM applications is necessary develop and produce the ceramics blocks in Brazil. The purpose of the present work is to compare the mechanical properties of blocks of zirconium developed in the Brazil (ProtMat® Co) and imported (VITA). It was determined the mechanical and physics properties of the two types of blocks of zirconium stabilized with ytria. The blocks have been sinterized at 1530 °C and their mechanical and physics properties were measured. The x-ray diffraction analysis showed only tetragonal phase, which improve the blocks toughness. The Vickers hardness and fracture toughness were 1300HV and 9 MPam1/2, respectively. High bending fracture resistance was obtained for both materials with average values of 910MPa. The Weibull modulus was m=10 for Brazilian and imported blocks. It was not observed an important difference among the microstructures and mechanical properties of the analyzed zirconium blocks.

scholarly journals Aesthetic All-ceramic Restorations: CAD-CAM System

2013 ◽  
Vol 7 (1) ◽  
pp. 139-147
Author(s):  
Enrique Fernández Bodereau ◽  
Laura Bessone ◽  
Gabriela Cabanillas
Keyword(s):  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Restorations
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