Change of Color and Translucency by Light Curing in Resin Composites

2006 ◽  
Vol 31 (5) ◽  
pp. 598-603 ◽  
Author(s):  
S. K. Sidhu ◽  
T. Ikeda ◽  
Y. Omata ◽  
M. Fujita ◽  
H. Sano
Keyword(s):  
Composite Materials ◽  
Clinical Relevance ◽  
Color Change ◽  
Resin Composite ◽  
Resin Composites ◽  
Light Curing ◽  
Shade Matching

Clinical Relevance For the precise shade matching of resin composite materials, clinicians should always be aware of the color change caused by light curing.

Effect of Pre-heating Resin Composite on Restoration Microleakage

10.2341/07-41 ◽  
2008 ◽  
Vol 33 (1) ◽  
pp. 72-78 ◽  
Author(s):  
W. C. Wagner ◽  
M. N. Aksu ◽  
A. L. Neme ◽  
J. B. Linger ◽  
F. E. Pink ◽  
...  
Keyword(s):  
Clinical Relevance ◽  
Resin Composite ◽  
Resin Composites ◽  
Tooth Structure ◽  
Positive Effects ◽  
Light Curing

Clinical Relevance The results of this study indicate that preheating composites can improve adaptation of resin composites to tooth structure. This technique significantly reduced microleakage. However, delaying light curing of the preheated composite after placement appears to be counterproductive and diminishes the positive effects from the preheating treatment. Flowable liner was less effective than preheating the composite in reducing microleakage.

The Effect of Curing Units and Staining Solutions on the Color Stability of Resin Composites

10.2341/07-3 ◽  
2007 ◽  
Vol 32 (6) ◽  
pp. 616-622 ◽  
Author(s):  
A. R. Yazici ◽  
Ç Çelik ◽  
B. Dayangaç ◽  
G. Özgünaltay
Keyword(s):  
Clinical Relevance ◽  
Immersion Time ◽  
Resin Composite ◽  
Color Stability ◽  
Time Dependent ◽  
Resin Composites ◽  
Color Changes ◽  
Light Curing

Clinical Relevance The color stability of resin composites did not vary based on the type of light curing unit. The effect of staining solutions on color changes in resin composites was resin composite and immersion time-dependent.

Wear Simulation of Resin Composites and the Relationship to Clinical Wear

10.2341/07-67 ◽  
2008 ◽  
Vol 33 (2) ◽  
pp. 177-182 ◽  
Author(s):  
W. W. Barkmeier ◽  
M. A. Latta ◽  
R. L. Erickson ◽  
T. M. Wilwerding
Keyword(s):  
Composite Materials ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Resin Composites ◽  
Wear Simulation ◽  
Wear Rates ◽  
The Relationship

Clinical Relevance Laboratory wear simulation may be useful for estimating the relative clinical wear rates of new resin composite materials.

scholarly journals The effect of a bleaching agent on the pigment removal and the bond strength of bulk-fill resin composites: an in vitro study

2018 ◽  
Vol 47 (5) ◽  
pp. 298-304
Author(s):  
Caroline de Farias CHARAMBA ◽  
Renally Bezerra Wanderley LIMA ◽  
Sônia Saeger MEIRELES ◽  
Rosângela Marques DUARTE ◽  
Ana Karina Maciel ANDRADE
Keyword(s):  
Bond Strength ◽  
Color Change ◽  
Resin Composite ◽  
Distilled Water ◽  
Filling Material ◽  
Resin Composites ◽  
Bleaching Agent ◽  
Microtensile Testing ◽  
Before And After

Abstract Introduction In order to simplify the technique, reduce the time required for direct adhesive restorations, bulk-fill resin composites have been developed be applied in bulk placement up to 4 mm increments. Objective Evaluating the color change (ΔE) and the microtensile bond strength (μTBS) of bulk fill resin composites (BFRC) to dentin after the immersion in regular beverages and the application of bleaching systems. Method Forty-five human molar teeth were randomly distributed in three groups according to the filling material (n=15): Filtek Bulk Fill, Tetric N Ceram Bulk Fill and Filtek Z100. The restored teeth were immersed in coffee, wine and distilled water (n=5) for 72 hours. The color parameters were measured using a spectrophotometer, having as basis the CIE L*a*b*, before and after tooth staining and application of bleaching processes. Subsequently, the teeth were sectioned to obtain the specimens for the microtensile testing. The ΔE values were analyzed applying the Kruskal-Wallis and the Wilcoxon tests, and the μTBS values were analyzed applying the ANOVA and the Bonferroni tests (p<0.05). Result There were no significant differences in the ∆E values when comparing the BFRCs to the conventional resin composite (CRC) in most of the experimental groups. The ∆E values did not present significant differences before and after the application of bleaching processes for all the tested resin composites. The BFRCs presented higher μTBS values than the CRC after exposure to distilled water, wine and bleaching agent. Conclusion The studied BFRCs presented similar color stability to the CRC. The BFRCs presented higher bond strength to the dentin than the CTC in most of the evaluated conditions. The bleaching agent was not effective in whitening the stained restored teeth.

The Effect of Energy Application Sequence on the Microtensile Bond Strength of Different C-factor Cavity Preparations

10.2341/06-30 ◽  
2007 ◽  
Vol 32 (2) ◽  
pp. 124-132 ◽  
Author(s):  
G. Maghaireh ◽  
M. R. Bouschlicher ◽  
F. Qian ◽  
S. R. Armstrong
Keyword(s):  
Bond Strength ◽  
Clinical Relevance ◽  
High Irradiance ◽  
Resin Composites ◽  
Microtensile Bond Strength ◽  
Light Curing ◽  
Bond Strengths ◽  
Energy Application

Clinical Relevance Light curing of resin composites in high C-factor cavity preparations using a high irradiance energy application sequence may lead to decreased bond strength. However, the high irradiance energy application sequence did not result in lower bond strengths in lower C-factor cavity preparations.

scholarly journals Effect of Brushing Time and Dentifrice Abrasiveness on Color Change and Surface Roughness of Resin Composites

2015 ◽  
Vol 26 (5) ◽  
pp. 507-513 ◽  
Author(s):  
Lourenço de Moraes Rego Roselino ◽  
Michelle Alexandra Chinelatti ◽  
Carla Cecilia Alandia-Román ◽  
Fernanda de Carvalho Panzeri Pires-de-Souza
Keyword(s):  
Surface Roughness ◽  
Healthy Individual ◽  
Repeated Measures ◽  
Color Change ◽  
Resin Composite ◽  
Color Stability ◽  
Resin Composites ◽  
Repeated Measures Anova ◽  
Bonferroni Test ◽  
Initial Color

Abstract: Dentifrice abrasiveness and brushing time may increase color change (∆E) and surface roughness (∆Ra) of resin composites. This study aimed to evaluate the effect of mechanical brushing time of dentifrices with different abrasiveness on ∆E and ∆Ra of nanofilled (Z350, 3M ESPE) and nanohybrid (Tetric N-Ceram, Ivoclar Vivadent) resin composites. Sixteen specimens (12 mm diameter x 2 mm thick) were fabricated using a white Teflon matrix of each resin composite and a ceramic (IPS e.max Ceram, Ivoclar Vivadent), used as control. After initial color readouts on white backgrounds (Spectrophotometer PCB 6807, Byk Gardner), with D65 standard illuminant, and surface roughness (Rugosimeter Surfcorder SE 1700, Kosalab) with cut-off=0.8 mm and speed=0.25 mm/s, specimens were assigned (n=8) according to the abrasiveness of the dentifrices: RDA* 68 (Colgate) and RDA* 180 (Colgate Total Plus Whitening). Specimens were submitted to mechanical brushing (58,400 cycles) and after every 14,600 cycles (1 year of brushing by a healthy individual), new color and surface roughness readouts were taken. Color stability was calculated by CIEDE2000. Data were analyzed by 3-way repeated measures ANOVA and Bonferroni test (p<0.05), and demonstrated that the dentifrice abrasiveness (p=0.02) and brushing time (p<0.0001) affected the ∆E of nanofilled resin composite. There was no difference on surface roughness of materials (p=0.6752) or brushing time (p=0.7997). In conclusion, the longer the brushing time and dentifrice abrasiveness, the greater the color change of the nanofilled resin composite. The surface roughness was not influenced by dentifrice abrasiveness.

scholarly journals Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2281
Author(s):  
Eija Säilynoja ◽  
Sufyan Garoushi ◽  
Pekka K. Vallittu ◽  
Lippo Lassila
Keyword(s):  
Fracture Toughness ◽  
Resin Composite ◽  
Rotating Disk ◽  
Monomer Conversion ◽  
Short Fiber ◽  
Flexural Properties ◽  
Resin Composites ◽  
Fiber Reinforced ◽  
Three Point Bending ◽  
Light Curing

As a core build-up material, dual-cured (DC) resin-based composites are becoming popular. The aim of this research was to investigate specific physical and handling properties of new experimental short-fiber-reinforced DC resin composites (SFRCs) in comparison to different commercial, conventional DC materials (e.g., Gradia Core, Rebilda DC, LuxaCore Z, and Visalys® CemCore). Degree of monomer conversion (DC%) was determined by FTIR-spectrometry using either self- or light-curing mode. The flexural strength, modulus, and fracture toughness were calculated through a three-point bending setup. Viscosity was analyzed at room (22 °C) and mouth (35 °C) temperatures with a rotating disk rheometer. The surface microstructure of each resin composite was examined with scanning electron microscopy (SEM). Data were statistically analyzed with analysis of variance ANOVA (p = 0.05). The curing mode showed significant (p < 0.05) effect on the DC% and flexural properties of tested DC resin composites and differences were material dependent. SFRC exhibited the highest fracture toughness (2.3 MPa m1/2) values and LuxaCore showed the lowest values (1 MPa m1/2) among the tested materials (p < 0.05). After light curing, Gradia Core and SFRCs showed the highest flexural properties (p < 0.05), while the other resin composites had comparable values. The novel DC short-fiber-reinforced core build-up resin composite demonstrated super fracture toughness compared to the tested DC conventional resin composites.

scholarly journals Cytotoxicity of Composite Materials Polymerized with LED Curing Units

10.2341/07-16 ◽  
2008 ◽  
Vol 33 (1) ◽  
pp. 23-30 ◽  
Author(s):  
A. Knezevic ◽  
D. Zeljezic ◽  
N. Kopjar ◽  
Z. Tarle
Keyword(s):  
Composite Materials ◽  
Light Intensity ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Pulp Tissue ◽  
Curing Light

Clinical Relevance Curing light intensity is one of the main parameters for proper resin composite cure. Inadequate polymerization of a composite can be harmful to vital pulp tissue and can compromise the durability and quality of the final restoration.

The Influence of Tip Geometry and Distance on Light-curing Efficacy

10.2341/07-94 ◽  
2008 ◽  
Vol 33 (3) ◽  
pp. 325-331 ◽  
Author(s):  
G. Corciolani ◽  
A. Vichi ◽  
C. L. Davidson ◽  
M. Ferrari
Keyword(s):  
Light Source ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Restorative Material ◽  
Entry And Exit ◽  
Depth Of Cure ◽  
Composite Restorations ◽  
Light Curing

Clinical Relevance Among the factors that significantly influence the depth of cure of resin composite restorations—the distance between the tip of the light source and the restorative material—as well as the geometry of the tip, are crucial parameters. Increasing the ratio between the entry and exit diameter of the tip will result in an improvement in the depth of cure for lower distances between the tip of the light source and the restorative material, while decreasing the ratio of the depth of cure, which will be higher for greater distances.

scholarly journals Influence of the Internal Conditioning of Indirect Restorations of Resin Composite in Relation to Microleakage Using LEDs and QTH Units

10.2341/08-83 ◽  
2009 ◽  
Vol 34 (3) ◽  
pp. 293-298 ◽  
Author(s):  
S. Calabrez-Filho ◽  
V. C. N. Calabrez ◽  
E. G. Reston ◽  
M. F. Andrade ◽  
L. H. Borges
Keyword(s):  
Clinical Relevance ◽  
Resin Composite ◽  
Resin Composites ◽  
Composite Inlays

Clinical Relevance An efficient polymerization of resin composite inlays associated with treatment of the surface and luting with dual resinous cement and flowable resin composites presents better longevity of restorations.

Sign in / Sign up

Export Citation Format

Share Document