scholarly journals Evaluation of zirconia bonding to veneering porcelain

2014 ◽  
Vol 60 (02) ◽  
pp. 51-56 ◽  
Author(s):  
Aneta Mijoska ◽  
Mirjana Popovska
Keyword(s):  
Zirconium Dioxide ◽  
Adhesive Bonding ◽  
High Strength ◽  
Dental Tissues ◽  
Dental Crowns ◽  
Standard Procedures ◽  
All Ceramic ◽  
Hard Dental Tissues ◽  
Ceramic Restorations

Zirconium dioxide as core ceramic material for dental crowns and bridges, possess high strength, chemical stability and superior aesthetics after veneering. Veneering ceramic is considered to be the weakest part of all-ceramic restorations. The adhesion between the core and veneering porcelain is based on the manner in which the connection occurs in metal-ceramic structures. Standard procedures for connecting zirconia to hard dental tissues and veneering materials do not achieve the required strength of bonding. The aim of the paper is to investigate different surface treatments of the zirconium dioxide ceramic core and find the best, for achieving highest adhesive bonding values to veneering porcelain. The study was primarily designed to investigate the bonding strength of the veneering porcelain to zirconia with in vitro Macro shear bond strength test. The specimens with different surface treatment of the zirconia were divided in five groups of twelve according to the treatment of zirconium surface and results showed highest bonding values for specimens treated with Rocatec system.

scholarly journals An In Vitro Study to Investigate the Effect of Various Surface Treatments on the Core–Veneer Shear Bond Strength of Zirconia Restorations: A Scanning Electron Microscope Study

2018 ◽  
Vol 06 (01) ◽  
pp. 014-019
Author(s):  
Sumit Katoch ◽  
Manjit Kumar ◽  
Amrit Khosla ◽  
Ritu Batra ◽  
Navjot Kaur
Keyword(s):  
Bond Strength ◽  
Zirconium Dioxide ◽  
Shear Bond Strength ◽  
Adhesive Bonding ◽  
In Vitro Study ◽  
Surface Treatments ◽  
Scanning Electron Microscope Study ◽  
Dental Tissues ◽  
The Core

AbstractVeneering ceramic to the core is considered to be the weakest part of all-ceramic restorations. Zirconium dioxide, owing to its favorable properties such as high strength, chemical stability, and superior aesthetics, is the material of choice for fabrication of a core. The adhesion between the core and veneering porcelain is based on the same manner in which the connection occurs in metal–ceramic structures. However, the standard procedures for connecting zirconia to hard dental tissues and veneering materials do not achieve the required strength of bonding.The aim of this study was to investigate different surface treatments of the zirconium dioxide ceramic core for achieving highest adhesive bonding values to veneering porcelain. The study was primarily designed to investigate the bonding strength of the veneering porcelain to zirconia with in vitro macro shear bond strength test. The samples of zirconia were divided into four groups of 10 specimens, each according to the treatment of zirconium surface, and the results showed the highest bonding values for samples that were treated with the sandblasted group.

The Aesthetic Effect of All-Ceramic Pressed Crowns According to the Thickness and Color of the Materials Used - An In Vitro Study

2013 ◽  
Vol 587 ◽  
pp. 349-355
Author(s):  
Sergiu Drafta ◽  
Adelina Popescu ◽  
Vlad Naicu
Keyword(s):  
Human Eye ◽  
Color Parameters ◽  
Varying Thickness ◽  
Dental Abutment ◽  
All Ceramic ◽  
Materials Used ◽  
The Aesthetic ◽  
Ceramic Restorations ◽  
Final Color

The final color of all-ceramic restorations may be influenced by the varying thickness of the dental abutment. Eighty A2 color (MO and LT) ceramic discs and eighty A3.5 color and four different thicknesses composite discs of were produced. The measurements were performed using the Vita Easyshade spectrophotometer. The results were statistically analyzed. Conclusion: There are no significant differences (perceived by the human eye) of the color parameters in the CIE L*a*b* system when comparing different combinations.

scholarly journals Thermal Changes in the Hard Dental Tissue at Diode Laser Root Canal Treatment

2014 ◽  
Vol 41 (2) ◽  
pp. 31-35
Author(s):  
Ts. Uzunov ◽  
R. Grozdanova ◽  
E. Popova ◽  
T. Uzunov
Keyword(s):  
Laser Treatment ◽  
Diode Laser ◽  
Root Canal ◽  
In Vitro Study ◽  
Laser Coagulation ◽  
Dental Tissue ◽  
Dental Tissues ◽  
Thermal Changes ◽  
Hard Dental Tissues

Summary The laser coagulation at the apical part of the root canal after vital extirpation is a proper method of preventing complications such as pain, bleeding, remaining vital pulp. The aim of the present survey is to register the thermal changes that occur on the tooth surfaces during laser treatment of the root canal after vital extirpation. An in vitro study of 30 extracted teeth has been conducted. The teeth have been prepared with ProTaper nickel-titanium machine tools and wiped dry. During the course of laser treatment of root canals with a diode laser DenLase temperatures, changes of the surface of the hard dental tissues have been recorded with infrared camera FLIR T330. The captured thermal images have been processed with software product Flir Reporter Pro 9. In conclusion, temperature changes in hard dental tissues at diode laser treatment of the root canal are biocompatible.

High-strength CAD/CAM-fabricated veneering material sintered to zirconia copings — A new fabrication mode for all-ceramic restorations

2009 ◽  
Vol 25 (1) ◽  
pp. 121-128 ◽  
Author(s):  
F BEUER ◽  
J SCHWEIGER ◽  
M EICHBERGER ◽  
H KAPPERT ◽  
W GERNET ◽  
...  
Keyword(s):  
High Strength ◽  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Restorations

scholarly journals Stereomicroscopic analysis of dental materials employed in endodontic exposed to high temperatures

2017 ◽  
Vol 19 (2) ◽  
Author(s):  
Johanna Aramburo ◽  
Angela Zapata ◽  
Sugey Zúñiga ◽  
Freddy Moreno
Keyword(s):  
High Temperatures ◽  
Dental Materials ◽  
In Vitro Study ◽  
Human Teeth ◽  
Great Resistance ◽  
Dental Tissues ◽  
Specific Rank ◽  
Hard Dental Tissues ◽  
Physical Changes

Objective: To describe the physical estereomicroscopical changes that occur in dental tissues and materials employed in a conventional endodontic treatment after application of high temperatures. Materials and methods: An in Vitro study was carried out to observe microscopic, structural and physical changes on hard dental tissues (enamel, dentine and cement) and on endodontic materials (gutta-percha Maillefer Dentsply®, endodontical cement based on oxide of zinc-eugenol Eufar®, cement based on epoxic resin Top Seal® Dentsply®, glass ionomer Fuji I® GC America®, silver amalgam GS80® SDI® and composite Point 4® Kerr®) in 124 human teeth, submitted to five temperature ranks (200ºC, 400ºC, 600ºC, 800ºC, 1000ºC). Results: The studied tissues and dental materials presented great resistance to the high temperatures without varying considerably their micro structure, such as that the physical changes (dimensional stability, cracks, pits, fractures, texture, color, carbonization and incineration) can be observed through estereomicrophotographies and can be associated to each specific rank of temperature. Conclusions: Some macrostructural changes of dental tissues and the dental materials occur of specific form in each rank of temperature, and for this reason they can be employed in the comparison before and postmortem during the process of identification of burned or charred corpse and human remains. Key words: Forensic dentistry, human identification, stereomicroscopy, dental materials, high temperatures.

scholarly journals CLINICAL CASES INDICATING THE ADVANTAGES OF RESTORATIONS BY CERAMIC DEPOSITS OVER COMPOSITE SEALS

2019 ◽  
Vol 15 (1) ◽  
pp. 104-108
Author(s):  
Виктория Иванова ◽  
Viktoria Ivanova ◽  
Екатерина Макарова ◽  
Ekaterina Makarova ◽  
Максим Никоноров ◽  
...  
Keyword(s):  
Modern Technology ◽  
Practical Significance ◽  
Modern World ◽  
Tooth Structure ◽  
Dental Tissues ◽  
Ceramic Inlays ◽  
All Ceramic ◽  
Hard Dental Tissues ◽  
High Level ◽  
Clinical Cases

Background. In prosthetic dentistry, the replacement of a damaged tooth structure with ceramics has become increasingly common today. The possibility of achieving a high level of aesthetics, durability and cost-effectiveness in the restoration of the coronal part of the teeth with all-ceramic inlays by the method of indirect restoration is one of the topical issues for dentists. Objectives. This article gives an idea of the possibilities of modern technology in orthopedic dentistry. The aim of the work is to identify the quality of the restoration result as compared to fillings in cavities with a degree of destruction according to TOSFI (Tooth Occlusal Surface Failure Index offered by V.Y. Milikevich) -0.3- 0.6 in the teeth of the chewing group. Methods. The article deals with the clinical cases of the replacement of insolvent fillings made of a light-cured composite with cast ceramic microprostheses. For the restoration of the molars, 2 all-ceramic inlays were made on a 5-axis open-type milling system Wieland dental zenotec select hybrid. Results. Based on dental microscopic examination and a comparative analysis of the properties and behavior of the composite fillings and ceramic inlays, one can be sure that the restoration with ceramics is much superior to the composite filling, as it represents a more reliable, durable and aesthetic option for restoring the destroyed tissues of the crowns of chewing teeth. Conclusions. In the modern world, various technologies are being created for prosthetics of hard dental tissues that could create more and more perfect restorations. Looking at the investigated examples of clinical cases and relying on the statements of many authors of works on orthopedic dentistry, we can conclude that tabs are the best alternative to fillings. The practical significance of the work consists in identifying the greater efficacy of treatment for people with significant dental defects due to microprosthetics with ceramic inserts as compared with classical treatment with composite materials.

scholarly journals Erosive Effect of Acidic Beverages On Dental Filling Materials Surface (In Vitro Study)

2021 ◽  
Author(s):  
Yuliya Morozova ◽  
Barbora Novotná ◽  
Pavel Holík ◽  
Iva Voborná ◽  
Jana Zapletalová
Keyword(s):  
In Vitro Study ◽  
Dental Amalgam ◽  
Vitro Study ◽  
Dental Tissues ◽  
Dental Filling ◽  
Filling Materials ◽  
Before And After ◽  
Acidic Conditions ◽  
Hard Dental Tissues

Abstract Erosive tooth wear, that is characterized like irreversible loss of hard dental tissues due to influence of external and internal acids of nonbacterial origin, is one of the most common damage of a tooth surface. Erosive factors also affect the surface of dental reconstruction materials that ideally should be resistant against them. Dental filling materials designed for this purpose must be able to withstand these effects in a comparable or even better way than enamel. In our in vitro study we investigated using the nanoindentation the hardness of currently available dental filling materials (dental composite resin, self curing and dual cures glassionomer cement, dental amalgam) before and after erosive attacks (exposure to Coca Cola for 5 min and 14 days) and consequently compare it with them of human dental enamel. Furtermore we analised the surface topography of the samples before and after acidic exposure by confocal laser scanning microscope. In our experiments the filling materials were affected by the acidic environment only minimally in comparison with hard dental tissues. We confirmed the fact that dental amalgam is still the most mechanically and chemically resistant filling material. Both GIC materials showed the worst resistance against acidic conditions and higher surface roughness even before exposure. We also declared excellent withstanding of resin composite materials against acidic conditions that was even better than natural enamel. Furthermore by CLSM was detected almost unaltered surface of these filling materials. This fact as well as adhesive properties of resin composites allow to assume that this material could be the most suitable material for dental erosion reconstruction.

scholarly journals Contemporary All-ceramic Systems – Part 2

2007 ◽  
Vol 50 (2) ◽  
pp. 105-107 ◽  
Author(s):  
Shriharsha Pilathadka ◽  
Dagmar Vahalová
Keyword(s):  
Success Rate ◽  
Fracture Resistance ◽  
Clinical Success ◽  
High Strength ◽  
Ceramic Materials ◽  
In Vivo Studies ◽  
High Fracture ◽  
All Ceramic

Current all-ceramic materials offer a accepted level of fracture resistance, fit and aesthetics. High fracture resistance recommends it to be a material to support fixed partial denture (FPD) in a stress bearing area with clinical success. This part of the present literature review covers the success rate, selection criteria of all ceramic systems, cementation technique, finishing and polishing. In vitro and in vivo studies of new high strength ceramics were well documented. Data suggest that single crowns in the anterior and posterior region are more predictable than bridges. Well-studied longterm success rate for FPDs are very limited.

scholarly journals Evaluation of wear characteristics of natural teeth opposing all-ceramic restorations: An in vitro study

2018 ◽  
Vol 4 (3e) ◽  
pp. 287-292
Author(s):  
Jayasree Komala ◽  
Sudhakar Reddy T ◽  
Subhasri Kandhati ◽  
Keerthi Edulapalli
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Wear Characteristics ◽  
All Ceramic ◽  
Natural Teeth ◽  
Ceramic Restorations
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