scholarly journals 3D Surface Profile and Color Stability of Tooth Colored Filling Materials after Bleaching

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Bryant Anthony Irawan ◽  
Stacey Natalie Irawan ◽  
Sam’an Malik Masudi ◽  
Ninin Sukminingrum ◽  
Mohammad Khursheed Alam
Keyword(s):  
Surface Profile ◽  
Color Stability ◽  
Tooth Bleaching ◽  
Force Microscopy ◽  
Color Changes ◽  
Filling Materials ◽  
Atomic Force ◽  
3D Surface ◽  
Restorative Materials ◽  
Dental Restorative

This study aims to evaluate the effects of vital tooth bleaching with carbamide peroxide home bleaching and in-office bleaching on the color stability and 3D surface profile of dental restorative filling materials. Thirty discs (n=30) measure 6 mm in diameter and 2 mm thick for each of three restorative materials. These are nanofilled composite Filtek Z350 XT, the submicron composite EsteliteΣQuick, and nanofilled glass ionomer Ketac N100 nanoionomer and were fabricated in shade A2. Each group was further divided into three subgroups (n=10): subgroup A (Opalescence PF), subgroup B (Opalescence Boost in-office bleaching), and subgroup C (distilled water) serving as control. Samples were bleached according to the manufacturer’s instructions for a period of two weeks. The Commission Internationale de L’Eclairage (CIEL*,a*,b*) system was chosen for image processing, while 3D surface profile was tested with atomic force microscopy (AFM). Statistical analyses were performed with the Mann-Whitney tests and Krusal-Wallis with aPvalue of ≤0.05. The three restorative materials showed significant color changes (ΔE);P≤0.05. In diminishing order, the mean color changes recorded were EsteliteΣ(3.82 ± 1.6) > Ketac Nano (2.97 ± 1.2) > Filtek Z350 XT (2.25 ± 1.0). However, none of the tested materials showed statistically significant changes in surface roughness;P>0.05.

scholarly journals Nanocharacterization of Dental Materials by Atomic Force Microscopy and Their Thermal Degradation Evaluation

2021 ◽  
Vol 6 (1) ◽  
pp. 14
Author(s):  
Marius Pustan ◽  
Corina Birleanu ◽  
Sanda Mirela Pop
Keyword(s):  
Mechanical Properties ◽  
Atomic Force Microscopy ◽  
Tribological Properties ◽  
Dental Materials ◽  
Time Duration ◽  
Force Microscopy ◽  
Mechanical And Tribological Properties ◽  
Filling Materials ◽  
Atomic Force ◽  
Restorative Materials

Restorative dental materials must be produced with special characteristics because they are operating in a medium environment with different humidity and temperature. These day-to-day factors play an important role in the lifetime of such dental restorative materials. Resin composites have been by far the most successful in dental applications by meeting several stringent design requirements that are difficult to achieve with homogeneous materials, such as ceramics and metal alloys. The mechanical and tribological properties of direct restorative filling materials are crucial not only to serve and allow similarity to human enamel and dentine, but also to compare composites between them and determine the objective criteria for their selection. The objective of this research is to investigate the mechanical and tribological properties of some commercial restorative materials using the atomic force microscopy technique as a function of the operating temperature. Therefore, restorative materials are expected to replace and perform as natural tooth materials. The demand is so great that most of the time, restorative filling materials replace enamel and dentin, which have very different mechanical properties, namely hardness and elastic modulus. The scope is to estimate the lifetime of such materials starting from their nano-behaviors under nano-wear, nano-friction, nano-mechanical tests. To conclude, nanoindentation is an attractive method for measuring the mechanical behavior of small specimen volumes in dental hard materials. Using this technique, the mechanical and tribological properties of nanocomposite resins were investigated. This technique only evaluates the tribo-mechanical properties of a very shallow surface region of a specimen that may have undergone damage associated with mechanical preparation that is required to achieve a satisfactory flat sample for testing. Experimental study has been carried out with several normal loads and time-duration tests, i.e., representing several steps of severity conditions for materials under investigation.

scholarly journals The effect of optical brightening toothpaste on the color stability of esthetic restorative materials

2021 ◽  
Vol 11 (Suppl. 1) ◽  
pp. 81-85
Author(s):  
Firdevs Kahvecioğlu ◽  
Elçim Çoban ◽  
Hayriye Esra Ülker
Keyword(s):  
Color Change ◽  
Calculated Data ◽  
Color Stability ◽  
Color Changes ◽  
Significant Difference ◽  
Restorative Materials ◽  
Cherry Juice ◽  
Native Speakers Of English ◽  
Materials Used ◽  
Post Hoc

Aim: The aim of this study is to evaluate the effects of whitening toothpaste applications on the color stability of different tooth-colored restorative materials (Fuji IX, GC Fuji II LC, Equia Forte, and Kerr Point 4)  Methodology: Standardized fourty disc-shaped specimens were prepared from esthetic restorative materials and polished. The baseline color values of each specimen were then measured using a spectrophotometer, according to the Commission Internationale de l'Eclairage L*, a*, and b* (CIELAB) color scale. Ten specimens from each group were then immersed in two different beverages (cherry juice and coke) for seven days. After immersion, the color value of each specimen was re-measured. Each sample was brushed with whitening toothpaste for 30 seconds using an electric toothbrush. The samples were kept in distilled water at room temperature and brushing continued twice a day for seven days. The color change value, Delta E (ΔE), was calculated. Data were analyzed by two-way ANOVA and post hoc Tukey's test. Results: When the results were evaluated, after the colored samples had been brushed with whitening toothpaste, a difference was found between the Delta E values according to the materials used (p<0.001), but no difference was found in relation to the beverages (p>0.001). When the values of the color changes were evaluated after the first brushing with whitening toothpaste and before the specimens were colored with drinks, a difference was observed in the Fuji II cola, Fuji II cherry, and Equia Forte cola groups (p<0.05). When the values of the color changes were evaluated for specimens in which brushing had been done twice a day for seven days with whitening toothpaste and before they were colored with drinks, a significant difference was observed in the Fuji II cherry and Equia Forte cola groups (p<0.05). Conclusion: Using Signal White Now whitening toothpaste for 2 min 2 times a day for seven days caused significant changes in the color of the restorative materials. The color change is dependent upon the type of restorative material that is used.   How to cite this article: Kahvecioğlu F, Çoban E, Ülker HE. The effect of optical brightening toothpaste on the color stability of esthetic restorative materials. Int Dent Res 2021;11(Suppl.1):80-4. https://doi.org/10.5577/intdentres.2021.vol11.suppl1.13   Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.

scholarly journals Color Stability and Gloss of Esthetic Restorative Materials after Chemical Challenges

2019 ◽  
Vol 30 (1) ◽  
pp. 52-57 ◽  
Author(s):  
Eduardo Haruki Ozera ◽  
Fernanda Miori Pascon ◽  
Américo Bortolazzo Correr ◽  
Regina Maria Puppin-Rontani ◽  
Aline Rogéria de Castilho ◽  
...  
Keyword(s):  
Color Change ◽  
Artificial Saliva ◽  
Color Stability ◽  
Initial Surface ◽  
Resin Composites ◽  
Cranberry Juice ◽  
Color Changes ◽  
Restorative Materials ◽  
Post Hoc ◽  
Acidic Beverages

Abstract This study evaluated gloss and color changes of esthetic restorative materials subjected to different acidic beverages. Specimens of resin composites (Z350XT (Z350), IPS Empress Direct (ED), Charisma Diamond (CD)) were prepared and the initial surface gloss and color (ΔE) were measured (n=10). Then, the specimens were immersed in 4 mL of each of the different beverages (cranberry juice; Coca-Cola; coffee or artificial saliva) during 15 min, 3x/day for 14 days and new gloss and color readings were obtained. Color change was evaluated with the ΔE formula and gloss change values were obtained by the formula: (final gloss - initial gloss). Data was submitted to two-way ANOVA followed by Tukey’s post hoc test (a=0.05). CD showed the lowest color change among resin composites. The highest ΔE values were obtained after immersion in coffee and cranberry juice. Coffee promoted the highest gloss change (worst gloss retention), followed by cranberry juice, Coca-cola and artificial saliva (p<0.05). The type of beverage significantly influenced the gloss of resin composites. Coca-cola reduced gloss of the three resin composites in a similar manner. Coffee affected the ED gloss more than that of Z350 and CD, while cranberry juice affected Z350 more than ED and CD. Saliva had a more pronounced effect on the gloss retention of CD than ED. The beverages used in this study influenced the optical surface properties of the composites studied.

scholarly journals High-resolution fiber-coupled interferometric point sensor for micro- and nano-metrology

2015 ◽  
Vol 82 (7-8) ◽  
Author(s):  
Markus Schake ◽  
Markus Schulz ◽  
Peter Lehmann
Keyword(s):  
High Resolution ◽  
Measurement Errors ◽  
Surface Profile ◽  
Optical Measurements ◽  
High Demand ◽  
Force Microscopy ◽  
Atomic Force ◽  
Measurement Object ◽  
Contact Free

AbstractThe determination of surface roughness is a common challenge in industrial quality assurance. Because tactile techniques like the stylus method or atomic force microscopy run the risk of damaging the measurement object there is a high demand for contact-free optical measurements. In this contribution we demonstrate the feasibility of a high resolution fiber-coupled interferometric point sensor with periodical path length modulation to determine the surface profile of rough surfaces. Measurements on two specimens characterized by different roughness parameters are presented and corrections for common measurement errors, due to phase ambiguity are discussed.

Limits in measurements of contact lens surface profile using atomic force microscopy

2018 ◽  
Vol 165 ◽  
pp. 229-234 ◽  
Author(s):  
Rafał Brygoła ◽  
Sławomir Sęk ◽  
Maciej Sokołowski ◽  
Marek Kowalczyk-Hernández ◽  
Jacek Pniewski
Keyword(s):  
Atomic Force Microscopy ◽  
Contact Lens ◽  
Surface Profile ◽  
Force Microscopy ◽  
Atomic Force ◽  
Lens Surface

scholarly journals Evaluation of the color stability of two different posterior tooth colored restorative materials

F1000Research ◽  
2020 ◽  
Vol 9 ◽  
pp. 1251
Author(s):  
Chandrakanth Majeti ◽  
Ravichandra Ravi ◽  
Bhargav Kambhampati ◽  
Roopesh Borugadda ◽  
Srividya Athkuri ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Green Tea ◽  
Color Stability ◽  
Staining Procedure ◽  
Color Changes ◽  
Posterior Tooth ◽  
Color Differences ◽  
Restorative Materials ◽  
Test Materials

Background: The aim of this in vitro study was to evaluate the color stability of esthetic restorative materials (Cention N, Solare Sculpt) after exposure to different staining solutions (coffee, green tea and Diet Coke). Methods: Cylindrical specimens of both materials (n=40/material) were prepared using 4x8 mm metal molds. They were further divided (n=10) based on the beverages in which they are immersed. The color of each sample was recorded immediately after sample preparation and at 60 days after the staining procedure. Color changes were then analyzed statistically. Results: Color differences (ΔE) were statistically significant between Cention N and Solare sculpt in all beverages with Cention N showing highest staining after 60 days. Among all the beverages, coffee showed the highest level of staining. Conclusions: Staining beverages caused significant discolorations for both test materials. Cention N showed greater color variations with all beverages compared to Solare Sculpt. Coffee showed the highest staining with both materials, followed by Diet Coke then green tea.

scholarly journals Nonprescription Bleaching versus Home Bleaching with Professional Prescriptions: Which One is Safer? A Comprehensive Review of Color Changes and Their Side Effects on Human Enamel

2019 ◽  
Vol 13 (04) ◽  
pp. 589-598
Author(s):  
Farhana Omar ◽  
Zuryati Ab-Ghani ◽  
Normastura Abd Rahman ◽  
Mohamad Syahrizal Halim
Keyword(s):  
Surface Roughness ◽  
Over The Counter ◽  
Microscopic Appearance ◽  
Significance Level ◽  
Force Microscopy ◽  
Colorimetric Measurement ◽  
Color Changes ◽  
Atomic Force ◽  
Human Enamel ◽  
Before And After

Abstract Objectives This study evaluates the efficacy and safety of the professionally prescribed and nonprescription over-the-counter (OTC) bleaching agents. Materials and Methods Extracted human upper central incisors were prepared and stained with red wine for 14 days before being subjected to four different bleaching agents: professionally prescribed opalescence PF 15%, VOCO Perfect Bleach 10%, nonprescription OTC Crest 3D Whitestrips, and Whitelight Teeth Whitening System. Colorimetric measurement was performed with Vita Easyshade Handheld Spectrophotometer, enamel surface microhardness measured using Vickers Hardness machine, and surface roughness was evaluated with profilometer, before and after bleaching. Scanning electron microscope (SEM) evaluation and atomic force microscopy were conducted postbleaching. Statistical Analysis The data were analyzed with t-test, two-way ANOVA, one-way ANOVA, and Turkey’s test at a significance level of 5%. Results All bleaching products have the same efficacy to whiten stained enamel. Opalescence PF 15% showed significant increase in the microhardness (92.69 ± 68.316). All groups demonstrated significant increase in surface roughness (p < 0.05). SEM evaluation showed that Opalescence PF 15% resulted in same microscopic appearance as unbleached enamel, while VOCO Perfect Bleach 10%, Whitelight Teeth Whitening System and Crest 3D Whitestrips demonstrated mild to moderate irregularities and accentuated irregularities, respectively. Conclusion Professionally prescribed bleaching agent of Opalescence PF 15% is effective tin whitening the teeth, while the other bleaching products may be effective but also have deleterious effects on the enamel.

Sign in / Sign up

Export Citation Format

Share Document