scholarly journals Color Stability of Computer-aided Design–Computeraided Manufacturing of Ceramic Materials upon Lightemitting Diode Illumination Bleaching

2017 ◽  
Vol 8 (6) ◽  
pp. 445-451
Author(s):  
Niwut Juntavee ◽  
Apa Juntavee ◽  
Korpkiat Riyaboot
Keyword(s):  
Computer Aided Design ◽  
Color Stability ◽  
Ceramic Materials ◽  
Computer Aided ◽  
Aided Design ◽  
Lightemitting Diode

Ceramic Fragments and Metal-free Full Crowns: A Conservative Esthetic Option for Closing Diastemas and Rehabilitating Smiles

2013 ◽  
Vol 38 (6) ◽  
pp. 567-571 ◽  
Author(s):  
ME Miranda ◽  
KA Olivieri ◽  
FJ Rigolin ◽  
RT Basting
Keyword(s):  
Computer Aided Design ◽  
Color Stability ◽  
Dental Ceramics ◽  
Metal Free ◽  
Anterior Teeth ◽  
Computer Aided ◽  
Adhesive Cementation ◽  
Ceramic Crowns ◽  
Tooth Preparation ◽  
Aided Design

SUMMARY Dental ceramics make it possible to restore anterior teeth that have been esthetically compromised, presenting a high resistance to wear, biocompatibility, color stability, and low thermal conductivity. The development of different types of ceramic and techniques for adhesive cementation have made it possible to produce more conservative restorations without involving the healthy dental structure and with minimally invasive preparation, such as the bonding of ceramic fragments. The purpose of this article is to describe a clinical case in which diastemas were closed by using nanofluorapatite ceramic (e.max Ceram, Ivoclar-Vivadent) fragments on teeth 7 and 10 with minimal tooth preparation and metal-free ceramic crowns (e-max Ceram) reinforced with zirconia copings through a computer-aided design/computer-aided manufacturing system (Lava, 3M-ESPE) on teeth 8 and 9.

scholarly journals Influences of Light-emitting Diode Illumination Bleaching Technique on Nanohardness of Computer-aided Design and Computer-aided Manufacturing Ceramic Restorative Materials

2018 ◽  
Vol 19 (2) ◽  
pp. 196-204 ◽  
Author(s):  
Apa Juntavee ◽  
Niwut Juntavee ◽  
Phuwiwat Saensutthawijit
Keyword(s):  
Hydrogen Peroxide ◽  
Computer Aided Design ◽  
Light Emitting Diode ◽  
Surface Hardness ◽  
Ceramic Materials ◽  
Computer Aided Manufacturing ◽  
Light Emitting ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

ABSTRACT Aim This study evaluated the effect of light-emitting diode (LED) illumination bleaching technique on the surface nanohardness of various computer-aided design and computer-aided manufacturing (CAD/CAM) ceramic materials. Materials and methods Twenty disk-shaped samples (width, length, and thickness = 10, 15, and 2 mm) were prepared from each of the ceramic materials for CAD/CAM, including Lava™ Ultimate (LV), Vita Enamic® (En) IPS e.max® CAD (Me), inCoris® TZI (IC), and Prettau® zirconia (Pr). The samples from each type of ceramic were randomly divided into two groups based on the different bleaching techniques to be used on them, using 35% hydrogen peroxide with and without LED illumination. The ceramic disk samples were bleached according to the manufacturer's instruction. Surface hardness test was performed before and after bleaching using nanohardness tester with a Berkovich diamond indenter. Results The respective Vickers hardness number upon no bleaching and bleaching without or with LED illumination [mean ± standard deviation (SD)] for each type of ceramic were as follows: 102.52 ± 2.09, 101.04 ± 1.18, and 98.17 ± 1.15 for LV groups; 274.96 ± 5.41, 271.29 ± 5.94, and 268.20 ± 7.02 for En groups; 640.74 ± 31.02, 631.70 ± 22.38, and 582.32 ± 33.88 for Me groups; 1,442.09 ± 35.07, 1,431.32 ± 28.80, and 1,336.51 ± 34.03 for IC groups; and 1,383.82 ± 33.87, 1,343.51 ± 38.75, and 1,295.96 ± 31.29 for Pr groups. The results indicated surface hardness reduction following the bleaching procedure of varying degrees for different ceramic materials. Analysis of variance (ANOVA) revealed a significant reduction in surface hardness due to the effect of bleaching technique, ceramic material, and the interaction between bleaching technique and ceramic material (p < 0.05). Conclusion Bleaching resulted in a diminution of the surface hardness of dental ceramic for CAD/CAM. Using 35% hydrogen peroxide bleaching agent with LED illumination exhibited more reduction in surface hardness of dental ceramic than what was observed without LED illumination. Clinical significance Clinicians should consider protection of the existing restoration while bleaching. How to cite this article Juntavee N, Juntavee A, Saensutthawijit P. Influences of Light-emitting Diode Illumination Bleaching Technique on Nanohardness of Computer-aided Design and Computer-aided Manufacturing Ceramic Restorative Materials. J Contemp Dent Pract 2018;19(2):196-204.

scholarly journals The 7/8 Crown: A Lost Art

2012 ◽  
Vol 37 (5) ◽  
pp. 453-457 ◽  
Author(s):  
ST McGill ◽  
JR Holmes
Keyword(s):  
Computer Aided Design ◽  
Ceramic Materials ◽  
High Price ◽  
Computer Aided Manufacturing ◽  
Bonding Agents ◽  
All Ceramic ◽  
Computer Aided ◽  
Aided Design ◽  
Dental Schools

SUMMARY Historically, the longevity of teeth restored with gold inlays, onlays, crowns, and partial veneer restorations is excellent. However, in-office computer-aided design and computer-aided manufacturing restorations, laboratory-constructed all-ceramic bonded restorations, and conventional ceramo-metal restorations are more common. The high price of gold, the difficulty of the preparation, and the fact that most dental schools are de-emphasizing the teaching of partial veneer restorations has created a situation whereby the 7/8 crown is rarely viewed as the treatment of choice. Time and experience will determine if the new ceramic materials, along with the all-important bonding agents, can achieve the success of a well-done, all-gold restoration.

Influence of Surface Roughness on Mechanical Properties of Two Computer-aided Design/Computer-aided Manufacturing (CAD/CAM) Ceramic Materials

2012 ◽  
Vol 37 (6) ◽  
pp. 617-624 ◽  
Author(s):  
S Flury ◽  
A Peutzfeldt ◽  
A Lussi
Keyword(s):  
Surface Roughness ◽  
Computer Aided Design ◽  
Rank Correlation ◽  
Correlation Coefficients ◽  
Ceramic Materials ◽  
Spearman Rank Correlation ◽  
Spearman Rank ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

SUMMARY The aim of this study was to evaluate the influence of surface roughness on surface hardness (Vickers; VHN), elastic modulus (EM), and flexural strength (FLS) of two computer-aided design/computer-aided manufacturing (CAD/CAM) ceramic materials. One hundred sixty-two samples of VITABLOCS Mark II (VMII) and 162 samples of IPS Empress CAD (IPS) were ground according to six standardized protocols producing decreasing surface roughnesses (n=27/group): grinding with 1) silicon carbide (SiC) paper #80, 2) SiC paper #120, 3) SiC paper #220, 4) SiC paper #320, 5) SiC paper #500, and 6) SiC paper #1000. Surface roughness (Ra/Rz) was measured with a surface roughness meter, VHN and EM with a hardness indentation device, and FLS with a three-point bending test. To test for a correlation between surface roughness (Ra/Rz) and VHN, EM, or FLS, Spearman rank correlation coefficients were calculated. The decrease in surface roughness led to an increase in VHN from (VMII/IPS; medians) 263.7/256.5 VHN to 646.8/601.5 VHN, an increase in EM from 45.4/41.0 GPa to 66.8/58.4 GPa, and an increase in FLS from 49.5/44.3 MPa to 73.0/97.2 MPa. For both ceramic materials, Spearman rank correlation coefficients showed a strong negative correlation between surface roughness (Ra/Rz) and VHN or EM and a moderate negative correlation between Ra/Rz and FLS. In conclusion, a decrease in surface roughness generally improved the mechanical properties of the CAD/CAM ceramic materials tested. However, FLS was less influenced by surface roughness than expected.

scholarly journals Compendium of current ceramic materials used for the CAD/CAM dentistry.

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Kristýna Hynková ◽  
Iva Voborná ◽  
Bernard Linke ◽  
Liran Levin
Keyword(s):  
Computer Aided Design ◽  
New Technologies ◽  
Ceramic Materials ◽  
Clinical Situation ◽  
Computer Aided ◽  
Cad Cam ◽  
Ceramic Blocks ◽  
Materials Used ◽  
Aided Design

Abstract Nowadays, patients require the highest quality of treatment, but generally prefer to spend as little time as possible in the dental chair. Therefore, there is significant benefit for using new technologies such as CAD/CAM (computer aided design/computer aided manufacturing), which provides both quality and speed. There is an increase in ceramic materials and ceramic blocks/discs available, with varying properties. This has resulted in some confusion and difficulty in making an informed decision about which material is best for a specific clinical situation. The objective of this review is to provide an overview and comparison of basic mechanical properties of currently used CAD/CAM ceramic materials based on a review of the currently available literature.

scholarly journals Influence of experimental staining on the color stability of indirect computer-aided design/computer-aided manufacturing dental provisional materials

2018 ◽  
Vol 12 (02) ◽  
pp. 269-274 ◽  
Author(s):  
Thamer Almohareb ◽  
Mohammed S. Alkatheeri ◽  
Fahim Vohra ◽  
Ali Alrahlah
Keyword(s):  
Computer Aided Design ◽  
Color Stability ◽  
Monomer Conversion ◽  
Mean Value ◽  
Color Variation ◽  
Color Measurement ◽  
Computer Aided Manufacturing ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design

ABSTRACT Objective: This study presents a comparative analysis of the color stability of computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated provisional restorations with those of conventional restorations. Materials and Methods: Three different provisional restorative materials (Systemp C&B, 3M Protemp 4, and Telio CAD) were inspected for their color stability using four solutions (Pepsi, coffee, tea, and distilled water). All samples used were fabricated using A1 shade by following the manufacturer's instructions. Color assessment was performed using CIELAB system and a colorimeter. After baseline color measurement, color assessments were done weekly after immersion in specified solutions. Triplicate readings were taken for every sample and the mean value of the color coordinates (L*), (a*), and (b*) were recorded at baseline, week 1, week 2, week 3, and week 4. The data within different groups were compared statistically using analysis of variance (⍺ = 0.05). Results: Overall, the highest color stability was found in CAD/CAM material, followed by Protemp and SystempC&B. It was also observed that the maximum color variation was observed in case of coffee, followed by tea and Pepsi. Conclusions: CAD/CAM provisional material (Telio CAD) showed better color stability compared to conventional materials (Protemp 3M ESPE and SystempC&B Ivoclar Vivadent). CAD/CAM provisional materials are recommended for long-term temporization procedures. This is attributed to the prepolymerization, higher monomer conversion, and minimal preparation errors in CAD/CAM materials.

scholarly journals Rationale for the Use of CAD/CAM Technology in Implant Prosthodontics

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Jaafar Abduo ◽  
Karl Lyons
Keyword(s):  
Computer Aided Design ◽  
Laboratory Experiments ◽  
Clinical Evidence ◽  
Ceramic Materials ◽  
Main Stream ◽  
Implant Abutments ◽  
Computer Aided ◽  
Cad Cam ◽  
Aided Design ◽  
Further Development

Despite the predictable longevity of implant prosthesis, there is an ongoing interest to continue to improve implant prosthodontic treatment and outcomes. One of the developments is the application of computer-aided design and computer-aided manufacturing (CAD/CAM) to produce implant abutments and frameworks from metal or ceramic materials. The aim of this narrative review is to critically evaluate the rationale of CAD/CAM utilization for implant prosthodontics. To date, CAD/CAM allows simplified production of precise and durable implant components. The precision of fit has been proven in several laboratory experiments and has been attributed to the design of implants. Milling also facilitates component fabrication from durable and aesthetic materials. With further development, it is expected that the CAD/CAM protocol will be further simplified. Although compelling clinical evidence supporting the superiority of CAD/CAM implant restorations is still lacking, it is envisioned that CAD/CAM may become the main stream for implant component fabrication.

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