SHADE MATCH OF CAD/CAM LITHIUM SILICATE ALL-CERAMIC RESTORATIONS: EFFECT OF CERAMIC THICKNESS AND NON- TOOTH COLORED FOUNDATION

This case report describes the fabrication of monolithic all-ceramic restorations using zirconia-reinforced lithium silicate (ZLS) ceramics. The use of powder-free intraoral scanner, generative fabrication technology of the working model, and CAD/CAM of the restorations in the dental laboratory allows a completely digitized workflow. The newly introduced ZLS ceramics offer a unique combination of fracture strength (>420 MPa), excellent optical properties, and optimum polishing characteristics, thus making them an interesting material option for monolithic restorations in the digital workflow.

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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

Brazilian Dental Science ◽

10.14295/bds.2021.v24i2.2234 ◽

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.

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

Operative Dentistry ◽

10.2341/07-162 ◽

2008 ◽

Vol 33 (6) ◽

pp. 644-650 ◽

Cited By ~ 43

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.

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Evaluation of fit and efficiency of CAD/CAM fabricated all-ceramic restorations based on direct and indirect digitalization: a double-blinded, randomized clinical trial

Clinical Oral Investigations ◽

10.1007/s00784-015-1504-6 ◽

2015 ◽

Vol 20 (2) ◽

pp. 291-300 ◽

Cited By ~ 53

Author(s):

Danush Ahrberg ◽

Hans Christoph Lauer ◽

Martin Ahrberg ◽

Paul Weigl

Keyword(s):

Clinical Trial ◽

Randomized Clinical Trial ◽

All Ceramic ◽

Cad Cam ◽

Double Blinded ◽

Ceramic Restorations

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

Journal of Dental Research ◽

10.1177/0022034515608187 ◽

2015 ◽

Vol 95 (1) ◽

pp. 67-73 ◽

Cited By ~ 54

Author(s):

R. Belli ◽

A. Petschelt ◽

B. Hofner ◽

J. Hajtó ◽

S.S. Scherrer ◽

...

Keyword(s):

All Ceramic ◽

Cad Cam ◽

Ceramic Restorations

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Aesthetic All-ceramic Restorations: CAD-CAM System

International journal of odontostomatology ◽

10.4067/s0718-381x2013000100022 ◽

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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Esthetic Rehabilitation of Anterior Teeth with Copy-Milled Restorations: A Report of Two Cases

Case Reports in Dentistry ◽

10.1155/2017/2841398 ◽

2017 ◽

Vol 2017 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Sapna Rani ◽

Jyoti Devi ◽

Chandan Jain ◽

Parul Mutneja ◽

Mahesh Verma

Keyword(s):

Clinical Success ◽

Ceramic Materials ◽

Digital Revolution ◽

Anterior Teeth ◽

All Ceramic ◽

Computer Aided ◽

Recent Developments ◽

Cad Cam ◽

Copy Milling ◽

Ceramic Restorations

Digitalization has become part and parcel of contemporary prosthodontics with the probability of most of the procedures being based on the digital techniques in the near future. This digital revolution started in the latter half of the 20th century by converting analog objects/signals into digital bits and bytes. Recent developments in all-ceramic materials and systems of computer-aided designing and computer-aided manufacturing (CAD/CAM), copy milling, and so forth offer excellent esthetics and superb biocompatibility. Copy milling system for ceramics enables milling of the zirconia cores of all-ceramic restorations precisely and also if this system is properly used the procedure for fabricating all-ceramic restorations can be substantially simplified. This case report presents fabrication of all-ceramic Maryland Bridge and post-core with a copy milling system for esthetics and preservation of integrity of tooth. For both of the patients, the use of biologic, all-ceramic, copy-milled restorations resulted in clinical success and recovered function and esthetics.

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In Vitro Study of Comparative Evaluation of Marginal and Internal Fit between Heat-Pressed and CAD-CAM Monolithic Glass-Ceramic Restorations after Thermal Aging

Materials ◽

10.3390/ma13194239 ◽

2020 ◽

Vol 13 (19) ◽

pp. 4239

Author(s):

Roxana-Diana Vasiliu ◽

Sorin Daniel Porojan ◽

Liliana Porojan

Keyword(s):

Thermal Aging ◽

Glass Ceramic ◽

In Vitro Study ◽

Vitro Study ◽

Lithium Silicate ◽

Computer Aided ◽

Cad Cam ◽

Internal Fit ◽

Ceramic Restorations

The accuracy of newly developed ceramic materials is still being studied. Marginal and internal adaptation are known factors that have an essential impact on the long term success of dental restorations. The aim of this in vitro study was to evaluate the marginal and internal fit of heat-pressed and milled monolithic glass-ceramic restorations based on their ceramic type, processing technique, and in vitro thermocycling. Thirty-two crowns were studied and divided into four groups (n = 8), according to the ceramic material (feldspathic glass-ceramic (F) and zirconia reinforced lithium silicate glass-ceramic (ZLS)) and to their technological obtaining processes (milling (M) and heat-pressing (P)). A typodont preparation was scanned with a D2000 3D scanner to obtain identical 32 resin 3D-printed abutment teeth. Marginal and internal gaps were measured using the silicone replica technique under 40× magnification. The crowns were further cemented and thermally aged for 10,000 cycles After cementation and thermocycling of the samples, marginal and internal gaps were assessed using micro-CT (micro-computed tomography)) analysis. Data were statistically analyzed using statistical tests. Significant differences were found before and after cementation and thermocycling among the tested materials (p < 0.05). Related to technological processing, significant differences were seen in the marginal area between FP and FM (p < 0.05) Significant differences were also found in the axial and occlusal areas between the ZLSP and ZLSM. Thermocycling and cementation did not have a significant effect on the tested materials (p < 0.05). The technological processes influenced the marginal and internal fit of the crowns in favor of the CAD/CAM (computer aided design/computer aided manufacturing)technologies. Thermal aging had little effect on marginal adaptability; it increased the values for all the tested samples in a small way, but the values remained in their clinically acceptable range for all of the crowns.

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