RESTORATION OF DEFECTS IN CERAMIC VENEER FRAME PROSTHETIC TECHNOLOGY CAD/CAM

2018 ◽  
Vol 22 (6) ◽  
pp. 292-296
Author(s):  
D. I Morozov ◽  
R. S Zaslavsky ◽  
Konstantin Vladimirovich Shmatov ◽  
A. S Ivanov ◽  
D. V Martinov
Keyword(s):  
Dental Implants ◽  
High Efficiency ◽  
Intraoral Scanner ◽  
Metal Ceramic ◽  
Cad Cam ◽  
Technology Cad

In the article options of chipping of the ceramic veneer metal-ceramic fixed prostheses Zirconia or frameworks, including those based on dental implants. The variants of elimination of such defects are described by the degree of complication. Special attention is paid to the method of restoration of defective ceramic cladding by means of preparation of facing ceramics, scanning by CEREC intraoral scanner, milling of ceramic restoration and its fixation to the place of chipping. The author’s experience from six months to five years has shown the high efficiency of this method of repair of ceramic cladding.

Fabrication of a nonmetal clasp denture supported by an intraoral scanner and CAD-CAM

2018 ◽  
Vol 120 (1) ◽  
pp. 9-12 ◽  
Author(s):  
Ippei Hamanaka ◽  
Kota Isshi ◽  
Yutaka Takahashi
Keyword(s):  
Intraoral Scanner ◽  
Cad Cam

Clinical Evaluation of CAD/CAM Metal-Ceramic Posterior Crowns Fabricated from Intraoral Digital Impressions

2014 ◽  
Vol 27 (4) ◽  
pp. 331-337 ◽  
Author(s):  
Hazem Tamim ◽  
Henrik Skjerven ◽  
Anders Ekfeldt ◽  
Hans Rønold
Keyword(s):  
Clinical Evaluation ◽  
Digital Impressions ◽  
Metal Ceramic ◽  
Cad Cam

Engineering and Technology Based on Rapid Prototyping

2015 ◽  
Vol 770 ◽  
pp. 622-627 ◽  
Author(s):  
A.A. Saprikin ◽  
E.A. Ibragimov ◽  
E.V. Babakova
Keyword(s):  
Product Development ◽  
Rapid Prototyping ◽  
Systems Design ◽  
Design And Technology ◽  
Solid Model ◽  
Layer Deposition ◽  
Automation Systems ◽  
Engineering And Technology ◽  
Cad Cam ◽  
Technology Cad

In the process of design and product development, prototyping model is an important step to finalize the product. Rapid Prototyping (RP) is a technology of product synthesis layer deposition material. The method was developed in the early 1980s as a consequence of the enormous growth of automation systems design and technology (CAD / CAM). The prototype of a complex solid model to determine the final appearance of the product, evaluate the assemblability of products, etc.

scholarly journals Effect of Incisal Porcelain Veneering Thickness on the Fracture Resistance of CAD/CAM Zirconia All-Ceramic Anterior Crowns

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Noha Badran ◽  
Sanaa Abdel Kader ◽  
Fayza Alabbassy
Keyword(s):  
Fracture Resistance ◽  
Testing Machine ◽  
Mode Iii ◽  
Nickel Chromium ◽  
Significant Difference ◽  
All Ceramic ◽  
Metal Ceramic ◽  
Cad Cam ◽  
Ceramic Crown

Statement of Problem. In some clinical situations, the vertical length of either a prepared tooth or an implant abutment is short, while the occlusal clearance to be restored by a porcelain crown is large. Incisal thickness of the veneering porcelain should be considered to prevent mechanical failure of the crown. Purpose. The aim of this study is to evaluate the effect of two different incisal veneering porcelain thickness on the fracture resistance of the anterior all-ceramic CAD/CAM zirconia crown system as compared with the conventionally used metal ceramic crown system. Method. CAD/CAM zirconia all-ceramic and metal ceramic crowns were fabricated on the prepared dies with standardized dimensions and designs using standardized methods according to the manufacturer’s instructions. All crowns were then adhesively luted with resin-based cement (Multilink cement system), subjected to thermal cycling and cyclic loading, and were loaded until fracture using the universal testing machine to indicate the fracture resistance for each crown material in each veneering thickness. Results. Statistical analysis was carried out, and the results showed that the fracture resistance of the nickel-chromium metal ceramic group was significantly higher than that of the CAD/CAM zirconia all-ceramic group. Also, the fracture resistance of crowns with 1.5 mm incisal veneering thickness was significantly higher than those with 3 mm incisal veneering thickness in both groups. Furthermore, there was no significant difference in the fracture mode of the two groups where 50% of the total specimens demonstrated Mode II (veneer chipping), while 35% demonstrated Mode I (visible crack) and only 15% demonstrated Mode III (bulk fracture). Conclusion. High failure load values were demonstrated by the specimens in this study, which suggest sufficient strength of both incisal veneering thickness in both crown systems to withstand clinical applications; however, the fracture patterns still underline the requirement of a core design that support a consistent thickness of the veneering ceramic, and it is recommended to conduct long-term prospective clinical studies to confirm findings reported in the present study.

Marginal and Internal Discrepancies of Posterior Zirconia-Based Crowns Fabricated with Three Different CAD/CAM Systems Versus Metal-Ceramic

2015 ◽  
Vol 28 (5) ◽  
pp. 509-511 ◽  
Author(s):  
Rocio Ortega ◽  
Esther Gonzalo ◽  
Miguel Gomez-Polo ◽  
María Suárez
Keyword(s):  
Metal Ceramic ◽  
Cad Cam ◽  
Cam Systems

The Marginal Fit of CAD/CAM Monolithic Ceramic and Metal-Ceramic Crowns

2017 ◽  
Vol 28 (3) ◽  
pp. 299-304 ◽  
Author(s):  
Yolanda Freire ◽  
Esther Gonzalo ◽  
Carlos Lopez-Suarez ◽  
Maria J. Suarez
Keyword(s):  
Marginal Fit ◽  
Metal Ceramic ◽  
Cad Cam ◽  
Ceramic Crowns

scholarly journals New Intraoral Scanner-Based Chairside Measurement Method to Investigate the Internal Fit of Crowns: A Clinical Trial

2020 ◽  
Vol 17 (7) ◽  
pp. 2182 ◽  
Author(s):  
Maximiliane Amelie Schlenz ◽  
Jonas Vogler ◽  
Alexander Schmidt ◽  
Peter Rehmann ◽  
Bernd Wöstmann
Keyword(s):  
Evaluation Methods ◽  
Replica Method ◽  
P Value ◽  
Intraoral Scanner ◽  
Replica Technique ◽  
Target Parameter ◽  
Computer Aided ◽  
Cad Cam ◽  
Internal Fit ◽  
Internal Gap

To measure the internal fit of the computer-aided designed/computer-aided manufactured (CAD/CAM) crowns, a new scanner-based chairside approach was investigated in patients, and the results were compared to the established silicone replica technique and a digital laboratory replica method. Thirty full-coverage crown preparations were included. Based on a digital impression with an intraoral scanner (IOS, Trios 3), three CAD/CAM measurement copings (‘COM’, resin composite; ‘ZIR’, zirconium dioxide; ‘NPA’, non-precious alloy) were fabricated for each tooth preparation. The internal fit of the measurement copings was analyzed with three different evaluation methods: IOS-based digital approach (D-IOS), digital replica method with laboratory software (D-GOM), and conventional silicone replica technique (CV-SR). The congruence between the determined target parameter of the 80-µm cement space and the actual measured internal gap was investigated. Statistical analysis was performed by ANOVA (p-value < 0.05). No significant difference was determined between the three evaluation methods. However, significant differences were observed for the three coping materials (p-value < 0.05), the single measurement position (marginal, axial, and occlusal fit) (p-value < 0.05), and the interaction between the coping material and the measurement position (p-value < 0.05). COM revealed the smallest internal gap, followed by ZIR and NPA. Regardless of the coping material, the occlusal gap was higher than the axial and marginal gaps. Furthermore, only the internal gaps of the marginal area almost matched the target parameter of 80-µm for the cement space. D-IOS is effective for measuring internal fit of single crowns in different clinical settings.

Immediate CAD/ CAM Custom Fabricated Dental Implants

2010 ◽  
Vol 1 (2) ◽  
pp. 94-98
Author(s):  
Jafar Kolahi
Keyword(s):  
Dental Implants ◽  
Cad Cam

OPTIMAL PREPARATION JUNCTIONS FOR ALL-CERAMIC FIXED RESTORATIONS MADE BY CAM 5 – S 2 IMPRESSION, VHF

2015 ◽  
Vol 8 (2) ◽  
Author(s):  
Angelina Vlahova ◽  
Viktor Hadzhigaev ◽  
Christo Kissov ◽  
Rada Kazakova ◽  
Tanya Bozhkova
Keyword(s):  
Intraoral Scanner ◽  
Dental Tissues ◽  
Fixed Prosthodontics ◽  
Number Of Factors ◽  
All Ceramic ◽  
Cad Cam ◽  
Dark Color ◽  
Design Software ◽  
Ceramic Crown ◽  
Criteria For Selection

Introduction: The type of the preparation junction is determined by a number of factors that need to be taken in consideration with CAD/CAM Fixed Prosthodontics: the material of which the construction will be made; the type and condition of the retainer teeth, of their periodontium and the occlusion; the design software, the CAM setting and the type of drills; the working protocol; the type of the cement and the method of cementation.Purpose: The aim of this publication is to describe the optimal preparation junctions for all-ceramic crown and bridge restorations made by CAM 5 - S 2 Impression, VHF.Materials and methods: Suitable are chamfer and shoulder preparation junction with rounded inner angle (width 1 - 1, 5 mm). Trimming of 1.5 – 2 mm dental tissues is necessary on the occlusal surface. The homothetic reduction of teeth is optimal.Results and discussion: The width depends on the size and vitality of the tooth. In stained teeth and those built with metal pins the removal of more tissues provides a greater volume needed to disguise the dark color. Vestibular preparation under the level of the gingiva is preferable to ensure optimal aesthetics. Preparation junction is determined also by the CAD/CAM technology - the type of drills and protocol of impression taking (classical or digital). The creation of a working model with TRIOS, 3Shape intraoral scanner is greatly facilitated by preparation junctions made above the gingival margin.Conclusion: Knowledge about the criteria for selection the preparation junctions is essential for fabrication accurate and aesthetic CAD/CAM restorations.

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