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.

Evaluation of Curing Light Distance on Resin Composite Microhardness and Polymerization

2007 ◽  
Vol 32 (6) ◽  
pp. 571-578 ◽  
Author(s):  
K. M. Rode ◽  
Y. Kawano ◽  
M. L. Turbino
Keyword(s):  
Physical Properties ◽  
Mechanical Behavior ◽  
Clinical Application ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Restorative Material ◽  
Light Curing ◽  
Curing Light ◽  
Dental Professional

Clinical Relevance Different light curing units, the thickness of the resin composite increments and the exposure distance to a curing light may change the physical properties of a restorative material and compromise its mechanical behavior under clinical loading conditions. Understanding how these factors can affect the quality of restorative products may help the dental professional in selecting the best activating source for a specific clinical application.

scholarly journals Effects of Total and Selective Bonding on Marginal Adaptation and Microleakage of Class I Resin Composite Restorations In Vitro

2008 ◽  
Vol 33 (6) ◽  
pp. 629-635 ◽  
Author(s):  
P. R. Schmidlin ◽  
T. Huber ◽  
T. N. Göhring ◽  
T. Attin ◽  
A. Bindl
Keyword(s):  
Clinical Relevance ◽  
Resin Composite ◽  
Class I ◽  
Marginal Adaptation ◽  
Glass Ionomer ◽  
Composite Restorations

Clinical Relevance Within the limitations of the current study, the use of glass ionomer liners improves the margin quality of Class I resin composite restorations and reduces leakage.

scholarly journals Influence of Volumetric Shrinkage and Curing Light Intensity on Proximal Contact Tightness of Class II Resin Composite Restorations: In Vitro Study

2012 ◽  
Vol 37 (2) ◽  
pp. 205-210 ◽  
Author(s):  
H El-Shamy ◽  
MH Saber ◽  
CE Dörfer ◽  
W El-Badrawy ◽  
BAC Loomans
Keyword(s):  
Light Intensity ◽  
High Intensity ◽  
Resin Composite ◽  
In Vitro Study ◽  
Class Ii ◽  
Volumetric Shrinkage ◽  
Low Intensity ◽  
Composite Restorations ◽  
Curing Light

SUMMARY Background Proximal contact tightness of class II resin composite restorations is influenced by a myriad of factors. Previous studies investigated the role of matrix band type and thickness, consistency of resin composite, and technique of placement. However, the effect of volumetric shrinkage of resin and intensity of curing light has yet to be determined. Thus, the aim of this study was to identify the influence of these factors on the proximal contact tightness when restoring class II cavity preparations in vitro. Methods Sixty artificial molars were restored with either a low-shrinkage (Filtek Silorane, 3M ESPE) or a conventional (Z100, 3M ESPE) composite and polymerized with low-intensity (Smartlite IQ2, Dentsply) or high-intensity light curing units (DemiTM, Kerr). Proximal contact tightness was measured using the Tooth Pressure Meter. Data were statistically analyzed using one-way analysis of variance and Tukey post hoc test. Results Use of low-shrinkage composite (Filtek Silorane) resulted in significantly tighter proximal contacts compared to the use of conventional composite (Z100) when cured with the same polymerization unit (p<0.001). Moreover, the low-intensity curing unit (IQ2) resulted in significantly tighter contacts than the high-intensity unit when material is constant (p<0.001). Conclusions Low-shrinkage resin composite and low curing light intensity is associated with tighter proximal contact values.

Effect of Cyclic Loading on the Bond Strength of Class II Restorations with Different Composite Materials

10.2341/07-65 ◽  
2008 ◽  
Vol 33 (2) ◽  
pp. 163-168 ◽  
Author(s):  
A. N. Cavalcanti ◽  
F. H. O. Mitsui ◽  
F. Silva ◽  
A. R. Peris ◽  
A. Bedran-Russo ◽  
...  
Keyword(s):  
Composite Materials ◽  
Cyclic Loading ◽  
Bond Strength ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Clinical Situation ◽  
Class Ii ◽  
Selection Of

Clinical Relevance New resin composite technologies, such as nano-filled-based systems, have been developed. The assessment of such materials in a simulated laboratory chewing condition may assist with the selection of composites in a clinical situation.

Evaluation of Light Intensity Output of QTH and LED Curing Devices in Various Governmental Health Institutions

2011 ◽  
Vol 36 (4) ◽  
pp. 356-361 ◽  
Author(s):  
MM Al Shaafi ◽  
AM Maawadh ◽  
MQ Al Qahtani
Keyword(s):  
Light Intensity ◽  
Clinical Relevance ◽  
Restorative Materials ◽  
Light Curing ◽  
Health Institutions

Clinical Relevance Evaluating the intensity of a light curing unit regularly prior to the application of tooth-colored restorative materials is essential to assure the quality of restorative procedures.

scholarly journals Three-year Evaluation of Posterior Vertical Bite Reconstruction Using Direct Resin Composite–A Case Series

10.2341/08-11 ◽  
2009 ◽  
Vol 34 (1) ◽  
pp. 102-108 ◽  
Author(s):  
P. R. Schmidlin ◽  
T. Filli ◽  
C. Imfeld ◽  
S. Tepper ◽  
T. Attin
Keyword(s):  
Composite Materials ◽  
Clinical Relevance ◽  
Resin Composite ◽  
Case Series ◽  
And Function ◽  
Observation Period

Clinical Relevance The occlusion of extensively worn teeth can be restored using direct resin composite materials. The quality over a mean observation period of three years is good. The proposed method, using a wax-up-based template, can help the clinician to restore the occlusal anatomy and function.

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.

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.

Influence of Beveling and Ultrasound Application on Marginal Adaptation of Box-only Class II (slot) Resin Composite Restorations

10.2341/06-84 ◽  
2007 ◽  
Vol 32 (3) ◽  
pp. 291-297 ◽  
Author(s):  
P. R. Schmidlin ◽  
K. Wolleb ◽  
T. Imfeld ◽  
M. Gygax ◽  
A. Lussi
Keyword(s):  
Clinical Relevance ◽  
Resin Composite ◽  
Class Ii ◽  
Marginal Adaptation ◽  
Composite Restorations ◽  
Ultrasound Application

Clinical Relevance Beveling box-only Class II cavities is necessary to improve the marginal quality of restorations. Where beveling is impossible or difficult to achieve, ultrasound may improve marginal quality.

Beech sapling architecture following small and medium gap disturbances in silver fir-beech old-growth forests in Slovenia

2005 ◽  
Vol 156 (12) ◽  
pp. 481-486 ◽  
Author(s):  
Jurij Diaci ◽  
Lahorka Kozjek
Keyword(s):  
Light Intensity ◽  
Quality Characteristics ◽  
Stem Length ◽  
Silver Fir ◽  
Beech Forests ◽  
Vertical Growth ◽  
Relative Light Intensity ◽  
Stem Bending ◽  
Negative Effect

The objective of our research was to examine the effect of canopy shading on beech sapling architecture in the oldgrowth silver fir-beech forests of Pecka and Rajhenavski Rog. In August 2003 we sampled one plot (352 m2) in a large gap in Pecka, which was a result of a strong windstorm in 1983, and eight small gaps (26–78 m2) with similar sapling heights (3.8–8 m). A ground view of each gap was drawn including the characteristics of gap border trees and the density of separate sapling layers was recorded. The height and diameter were measured for each sapling, as well as the following quality characteristics on selected dominant saplings: width of the crown,number of larger branches and knots (>1/3 DBH), intensity of stem bending, deviation from vertical growth, number of terminal shoots, and the type of damage. The results show a negative effect of high canopy shading (estimated relative light intensity was below 5%) on the architectural quality of saplings. A lower overall density of saplings, greater intensity of bending and deviation from vertical growth, a shorter stem length without branches, a larger number of saplings with two terminal shoots, and a larger number of damaged saplings were observed in small gaps.

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