A Study on Metal-Ceramic Interface on Metal Base Dental Alloys

2015 ◽  
Vol 638 ◽  
pp. 14-19 ◽  
Author(s):  
Marian Miculescu ◽  
Marin Bane ◽  
Florin Miculescu ◽  
Lucian Toma Ciocan ◽  
Oana Preda ◽  
...  
Keyword(s):  
Chemical Elements ◽  
Dental Alloys ◽  
Hybrid Layer ◽  
Sintered Ceramic ◽  
Metal Base ◽  
Ceramic Mass ◽  
Metal Ceramic ◽  
Microscopy Analysis ◽  
Composition Properties ◽  
Ceramic Crown

Although the literature describes many studies that attempt to define and interpret the interaction between the metal component and overlying sintered ceramic mass, researchers still have conflicting opinions. It is not yet fully understood the hybrid layer occurrence phenomenon that rises by diffusion at the sintering temperature between the compositional elements of the alloy and the ceramic mass. Also, there isn’t a standardized technology test for the compatibility between the alloy for this technology and a specific plating ceramic mass, from the strength of the bond between the two components at the interface point of view.This paper aims to present the composition, properties and the interaction between the two materials that participates in obtaining metal-ceramic fixed prostheses, and tries to expose a possible method for analysing the bonding strength and compatibility between dental alloys and ceramic masses. However, the mechanical surface contamination by the migration of the chemical elements it is possible, due to the mechanical stresses during cutting and polishing due to the hardness differences between the prosthesis components.Electron microscopy analysis allows the diffusion phenomenon evaluation and of the fact that the elements with reduced concentration within the ceramic have a higher diffusivity (Al as compared with Si), and that metallic elements diffuse in the ceramic mass. The extent of this interdiffusion is probably the degree of adhesion between the two components of the mixed metal-ceramic crown.

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.

Fit of titanium and a base metal alloy metal-ceramic crown

2000 ◽  
Vol 83 (3) ◽  
pp. 314-318 ◽  
Author(s):  
Selçuk Oruç ◽  
Ýbrahim Tulunoglu
Keyword(s):  
Base Metal ◽  
Metal Alloy ◽  
Metal Ceramic ◽  
Ceramic Crown ◽  
Alloy Metal ◽  
Base Metal Alloy

scholarly journals Conservative, Surgical, and Prosthetic Treatment of a Patient with a Periapical Lesion Associated with an Atypical Intraoral Sinus Tract

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Michael Wolgin ◽  
Peter Tschoppe ◽  
Andrej M. Kielbassa
Keyword(s):  
Sinus Tract ◽  
Periapical Lesion ◽  
Short Term ◽  
Term Outcome ◽  
Short Term Outcome ◽  
Metal Ceramic ◽  
Affected Tissue ◽  
Ceramic Crown ◽  
Periapical Inflammation ◽  
Surrounding Bone

This report describes a clinical case with an atypical intraoral sinus tract formation from diagnosis and treatment to short-term outcome and definitive prosthetic rehabilitation. In detail, the patient underwent conservative nonsurgical root canal treatment followed by guided bone augmentation of the regions involved in periapical inflammation and sinus tract formation. The removal of the inflammatory source of the lesion as well as the affected tissue clearly led to a healing of the surrounding bone tissues. Subsequently, the tooth was reconstructed using a fibreglass post and a metal-ceramic crown; an implant was successfully placed in the previously inflamed bone region.

scholarly journals Difference Between Selected and Obtained Shade for Metal-ceramic Crown Systems

2008 ◽  
Vol 33 (5) ◽  
pp. 502-507 ◽  
Author(s):  
H. Omar ◽  
O. Atta ◽  
O. El-Mowafy
Keyword(s):  
Clinical Relevance ◽  
Metal Ceramic ◽  
Shade Matching ◽  
Ceramic Crown ◽  
Cerec 3D ◽  
Better Than

Clinical Relevance Veneered electroformed crowns and In-Ceram alumina crowns made with CEREC 3D produced shade-matching that was significantly better than that obtained with conventional porcelain-fused-to-metal crowns.

Fate of vital pulps beneath a metal-ceramic crown or a bridge retainer

2005 ◽  
Vol 38 (8) ◽  
pp. 521-530 ◽  
Author(s):  
G. S. P. Cheung ◽  
S. C. N. Lai ◽  
R. P. Y. Ng
Keyword(s):  
Metal Ceramic ◽  
Ceramic Crown

Development of an expert system for the simulation model for casting metal substructure of a metal-ceramic crown design

2017 ◽  
Vol 146 ◽  
pp. 27-35 ◽  
Author(s):  
Ivan Matin ◽  
Miodrag Hadzistevic ◽  
Djordje Vukelic ◽  
Michal Potran ◽  
Tomaz Brajlih
Keyword(s):  
Expert System ◽  
Simulation Model ◽  
Metal Ceramic ◽  
Ceramic Crown

scholarly journals PORCELAIN METAL CERAMIC CROWN VERSUS PORCELAIN VENEER

2018 ◽  
Vol 25 (05) ◽  
pp. 709-713
Author(s):  
M. Rafi Ullah Awan ◽  
Hira Asghar ◽  
Hamid Raza ◽  
Faiz Rasul ◽  
Muhammad Safdar Baig
Keyword(s):  
Anterior Tooth ◽  
Central Incisor ◽  
Maxillary Central Incisor ◽  
Full Coverage ◽  
Metal Ceramic ◽  
Dental Hospital ◽  
Ceramic Crown ◽  
To Receive ◽  
Study Setting

Objectives: To evaluate the success of porcelain metal ceramic crown andporcelain veneer in endodontically treated maxillary central incisor having discoloration. StudyDesign: Expermintal study. Setting: Akhtar Saeed Dental Hospital, Bahria Town, Lahore andde’Montmorency College of Dentistry, Lahore. Period: 1st January 2016 to 30th June 2016.Patients and Methods: This study includes 42 patients. All the patients had ages between35-40 years and either gender. These patients had discolored endodontically treated uppercentral incisor. The patients were randomly divided into two groups to receive either the metalceramic crown or the porcelain veneer. The restorations were given to the patients according tothe following standard protocols. Follow-up examination was determined as set format of study.The results were compiled at the expiry of twelve months. Results: There were 27 femalesand 15 males. The result is obtained 1.1629 which is statistically not significant at p<0.05.Conclusion: Being conservative in tooth reduction, veneer should be preferred while maskingdiscoloration of single anterior tooth instead of full coverage metal ceramic crown.

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