Fabrication of lithium silicate ceramic veneers with a CAD/CAM approach: A clinical report of cleidocranial dysplasia

2015 ◽  
Vol 113 (5) ◽  
pp. 355-359 ◽  
Author(s):  
Leonardo Fernandes da Cunha ◽  
Eduardo Mukai ◽  
Raphael Meneghetti Hamerschmitt ◽  
Gisele Maria Correr
2019 ◽  
Vol 10 (2) ◽  
pp. 120-127
Author(s):  
Sevki Cinar ◽  
Bike Altan ◽  
Gokhan Akgungor

Objective: To compare the bond strength of monolithic CAD-CAM materials to resin cement using different surface treatment methods. Materials and Methods: Lithium disilicate glass ceramic (IPS e-max CAD), zirconia-reinforced lithium silicate ceramic (Vita Suprinity), resin nanoceramic (Lava Ultimate), and hybrid ceramic (Vita Enamic) were used. Five groups of CAD-CAM blocks were treated as follows: control (C), HF etching (HF), HF etching + silanization (HF + S), sandblasting (SB), and sandblasting + silanization (SB + S). After surface treatments, SEM analyses were conducted. Specimens were cemented with self-adhesive resin cement (Theracem) and stored in distilled water at 37°C for 24 h. Shear bond strength (SBS) was measured, and failure types were categorized. Results were analyzed using two-way ANOVA and the post-hoc Tukey test. Results: Statistical analysis revealed significant differences between SBS values obtained for different surface treatments and CAD-CAM block types ( P < .001). Among the CAD-CAM materials, the highest SBS was reported in the HF + S group for Vita Enamic. Although IPS e.max CAD, Vita Suprinity, and Vita Enamic showed higher bond strength when treated with HF + S, Lava Ultimate has the highest bond strength value when treated with SB + S. Conclusions: The bond strength of CAD-CAM materials was influenced by surface treatment. Additionally, silanization significantly improved the bond strength of all materials except Lava Ultimate.


2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Sven Rinke ◽  
Matthias Rödiger ◽  
Dirk Ziebolz ◽  
Anne-Kathrin Schmidt

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.


2018 ◽  
Vol 43 (5) ◽  
pp. 530-538 ◽  
Author(s):  
M Zimmermann ◽  
A Valcanaia ◽  
G Neiva ◽  
A Mehl ◽  
D Fasbinder

ABSTRACT Objective: CAM fabrication is an important step within the CAD/CAM process. The internal fit of restorations is influenced by the accuracy of the subtractive CAM procedure. Little is known about how CAM strategies might influence the fit of CAD/CAM fabricated restorations. The aim of this study was to three-dimensionally evaluate the fit of CAD/CAM fabricated zirconia-reinforced lithium silicate ceramic partial crowns fabricated with three different CAM strategies. The null hypothesis was that different CAM strategies did not influence the fitting accuracy of CAD/CAM fabricated zirconia-reinforced lithium silicate ceramic partial crowns. Methods and Materials: Preparation for a partial crown was performed on a maxillary right first molar on a typodont. A chairside CAD/CAM system with the intraoral scanning device CEREC Omnicam (Dentsply Sirona, York, PA, USA) and the 3+1 axis milling unit CEREC MCXL was used. There were three groups with different CAM strategies: step bur 12 (12), step bur 12S (12S), and two step-mode (12TWO). The zirconia-reinforced lithium silicate ceramic Celtra Duo (Dentsply Sirona) was used as the CAD/CAM material. A new 3D method for evaluating the fit was applied, consisting of the quadrant scan with the intraoral scanning device CEREC Omnicam. The scan of the PVS material adherent to the preparation and the preparation scan were matched, and the difference analysis was performed with special software OraCheck (Cyfex AG, Zurich, Switzerland). Three areas were selected for analysis: margin (MA), axial (AX), and occlusal (OC). Statistical analysis was performed using 80% percentile, one-way ANOVA, and the post hoc Scheffé test with α=0.05. Results: Statistically significant differences were found both within and between the test groups. The aspect axial fit results varied from 90.5 ± 20.1 μm for the two-step milling mode (12TWO_AX) to 122.8 ± 12.2 μm for the milling with step bur 12S (12S_AX). The worst result in all groups was found for the aspect occlusal fit with the highest value for group 12S of 222.8 ± 35.6 μm. Group two-step milling mode (12TWO) performed statistically significantly better from groups 12 and 12S for the occlusal fit (p&lt;0.05). Deviation patterns were visually analyzed with a color-coded scheme for each restoration. Conclusions: CAM strategy influenced the internal adaptation of zirconia-reinforced lithium silicate partial crowns fabricated with a chairside CAD/CAM system. Sensible selection of specific areas of internal adaptation and fit is an important factor for evaluating the CAM accuracy of CAD/CAM systems.


2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Sven Rinke ◽  
Anne-Kathrin Pabel ◽  
Matthias Rödiger ◽  
Dirk Ziebolz

The chairside fabrication of a monolithic partial crown using a zirconia-reinforced lithium silicate (ZLS) ceramic is described. The fully digitized model-free workflow in a dental practice is possible due to the use of a powder-free intraoral scanner and the computer-aided design/computer-assisted manufacturing (CAD/CAM) of the restorations. The innovative ZLS material offers a singular combination of fracture strength (>370 Mpa), optimum polishing characteristics, and excellent optical properties. Therefore, this ceramic is an interesting alternative material for monolithic restorations produced in a digital workflow.


2019 ◽  
Vol 121 (1) ◽  
pp. 22-25 ◽  
Author(s):  
Gustavo Dartora ◽  
Pedro Henrique Wentz Tretto ◽  
Rodrigo Varella de Carvalho ◽  
Atais Bacchi

2018 ◽  
Vol 19 (4) ◽  
pp. 230-233
Author(s):  
Adrian Mihai Varvară ◽  
◽  
Ralph Boutros ◽  
Anca Ştefania Mesaroş ◽  
Elena Bianca Varvară ◽  
...  

Author(s):  
Larissa Marcia Martins Alves ◽  
Lisseth Patricia Claudio Contreras ◽  
Tiago Moreira Bastos Campos ◽  
Marco Antonio Bottino ◽  
Luiz Felipe Valandro ◽  
...  

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