Polymerization Efficiency of Different Photocuring Units Through Ceramic Discs

2006 ◽  
Vol 31 (1) ◽  
pp. 68-77 ◽  
Author(s):  
H. Jung ◽  
K. H. Friedl ◽  
K. A. Hiller ◽  
H. Furch ◽  
S. Bernhart ◽  
...  
Keyword(s):  
Light Source ◽  
Clinical Relevance ◽  
Light Curing ◽  
Ceramic Thickness ◽  
Ceramic Restorations

Clinical Relevance The ability of modern light curing units to photocure luting resin through ceramic restorations is dependent on the type of light source, ceramic thickness and use of a self-curing catalyst.

Influence of the Feldspathic Ceramic Thickness and Shade on the Microhardness of Dual Resin Cement

10.2341/05-51 ◽  
2006 ◽  
Vol 31 (3) ◽  
pp. 384-389 ◽  
Author(s):  
C. J. Soares ◽  
N. R. Silva ◽  
R. B. Fonseca
Keyword(s):  
Clinical Relevance ◽  
Resin Cement ◽  
Resin Cements ◽  
Ceramic Thickness ◽  
Ceramic Restorations

Clinical Relevance Polymerization of dual resin cements is significantly more affected by thickness of feldspathic ceramic restorations than by shade.

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.

The Effect of Ceramic Restoration Shade and Thickness on the Polymerization of Light- and Dual-cure Resin Cements

2011 ◽  
Vol 36 (6) ◽  
pp. 661-669 ◽  
Author(s):  
E Kilinc ◽  
SA Antonson ◽  
PC Hardigan ◽  
A Kesercioglu
Keyword(s):  
Clinical Relevance ◽  
Resin Cement ◽  
Resin Cements ◽  
All Ceramic ◽  
Ceramic Thickness ◽  
Ceramic Restorations

Clinical Relevance Resin cements are generally considered as the material of choice in cementation of all-ceramic restorations. The decision between light- and dual-cure resin cement may depend on the properties of the ceramic restoration as well as the location of the tooth. The ceramic thickness has a more intense effect on polymerization than ceramic shade.

Effect of LED Light-Curing Spectral Emission Profile on Light-Cured Resin Cement Degree of Conversion

2020 ◽  
Author(s):  
RQ Ramos ◽  
RR Moraes ◽  
GC Lopes
Keyword(s):  
Clinical Relevance ◽  
Degree Of Conversion ◽  
Resin Cement ◽  
Light Activation ◽  
Spectral Emission ◽  
Led Light ◽  
Emission Profile ◽  
Light Curing

Clinical Relevance The use of multipeak LED light-curing guarantees efficiency on light activation of Ivocerin-containing light-cured resin cement.

Comparison of Temperature Changes in the Pulp Chamber Induced by Various Light Curing Units, In Vitro

10.2341/05-26 ◽  
2006 ◽  
Vol 31 (2) ◽  
pp. 261-265 ◽  
Author(s):  
A. R. Yazici ◽  
A. Müftü ◽  
G. Kugel ◽  
R. D. Perry
Keyword(s):  
Clinical Relevance ◽  
Critical Factor ◽  
Pulp Chamber ◽  
Temperature Changes ◽  
Thermal Transfer ◽  
Light Curing

Clinical Relevance The thickness of the residual dentin is a critical factor in the reducing thermal transfer to pulp, and this transfer varies with the curing unit used.

Effect of Irradiance and Exposure Duration on Temperature and Degree of Conversion of Dual-Cure Resin Cement for Ceramic Restorations

2018 ◽  
Vol 43 (6) ◽  
pp. E280-E287 ◽  
Author(s):  
JS Shim ◽  
SH Han ◽  
N Jha ◽  
ST Hwang ◽  
W Ahn ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Exposure Duration ◽  
Near Infrared ◽  
Degree Of Conversion ◽  
Resin Cement ◽  
Resin Cements ◽  
Digital Thermometer ◽  
Light Curing ◽  
Ceramic Restorations

SUMMARY This study investigated the effects of irradiance and exposure duration on dual-cured resin cements irradiated through ceramic restorative materials. A single light-curing unit was calibrated to three different irradiances (500, 1000, and 1500 mW/cm2) and irradiated to three different attenuating materials (transparent acryl, lithium disilicate, zirconia) with 1-mm thicknesses for 20 or 60 seconds. The changes in irradiance and temperature were measured with a radiometer (or digital thermometer) under the attenuating materials. The degree of conversion (DC) of dual-cure resin cement after irradiation at different irradiances and exposure durations was measured with Fourier transform near infrared spectroscopy. Two-way analysis of variance revealed that irradiance (p<0.001) and exposure duration (p<0.001) significantly affected temperature and DC. All groups showed higher DCs with increased exposure times (p<0.05), but there were no statistically significant differences between the groups irradiated with 1000 mW/cm2 and 1500 mW/cm2 (p>0.05). Higher-intensity irradiances yielded higher temperatures (p<0.05), but exposure time did not affect temperature when materials were irradiated at 500 mW/cm2 (p>0.05).

scholarly journals Sorption, solubility and residual monomers of a dental adhesive cured by different light-curing units

2010 ◽  
Vol 21 (5) ◽  
pp. 432-438 ◽  
Author(s):  
Francine do Couto Lima Moreira ◽  
Nelson Roberto Antoniosi Filho ◽  
João Batista de Souza ◽  
Lawrence Gonzaga Lopes
Keyword(s):  
Light Source ◽  
High Performance ◽  
Light Emitting Diode ◽  
Single Bond ◽  
Light Emitting ◽  
Dental Adhesive ◽  
Quartz Tungsten Halogen ◽  
Light Curing ◽  
Storage Times ◽  
Curing Regimes

The aim of this study was to assess polymerization ability of three light-curing units by evaluating the influence of the light source, curing regimen and permeant (water or ethanol) on sorption, solubility and amount of residual monomers of a dental adhesive. Specimens of Adper Single Bond 2 were fabricated using a stainless steel circular matrix (8 mm x 1 mm). One quartz-tungsten-halogen (QTH) lamp and two light-emitting diode (LED) device at three different curing regimes (L1 = 12 J; L2 = 24 J; L3 = 24 J) were used to cure the specimens. Specimens were stored in two types of permeants - deionized water or 75% ethanol - for two storage times (G1 =7 days; G2 = 30 days). The specimens underwent water sorption and solubility tests, according to ISO 4049:2000 standard. After storage, residual monomers were identified and quantified by high performance liquid chromatography (HPLC). For sorption, L1 showed the highest values and QTH, the lowest. For solubility, in ethanol-stored groups, L1 had also the highest values, and QTH, the lowest, and findings were significantly different from the other curing regimens. L1 leached significantly more monomers than the others, and QTH had the lowest results. In conclusion, the type of light source, the curing regimen and the permeant affected sorption, solubility and amount of residual monomers of the adhesive under study.

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.

Marginal Fit of Heat-pressed vs CAD/CAM Processed All-ceramic Onlays Using a Milling Unit Prototype

2008 ◽  
Vol 33 (6) ◽  
pp. 644-650 ◽  
Author(s):  
S. Reich ◽  
S. Gozdowski ◽  
L. Trentzsch ◽  
R. Frankenberger ◽  
U. Lohbauer
Keyword(s):  
Clinical Relevance ◽  
Clinical Performance ◽  
Important Influence ◽  
Marginal Gap ◽  
Marginal Fit ◽  
All Ceramic ◽  
Cad Cam ◽  
Ceramic Restorations

Clinical Relevance The marginal fit of all-ceramic restorations has an important influence on the clinical performance and lifetime of adhesively luted restorations. In proximal boxes, an average marginal gap of less than 100 μm is claimed. These clinical requirements are fulfilled by both processing procedures.

scholarly journals Surface Roughness in Ceramics with Different Finishing Techniques Using Atomic Force Microscope and Profilometer

10.2341/05-54 ◽  
2006 ◽  
Vol 31 (4) ◽  
pp. 442-449 ◽  
Author(s):  
B. Tholt ◽  
W. G. Miranda-Júnior ◽  
R. Prioli ◽  
J. Thompson ◽  
M. Oda
Keyword(s):  
Surface Roughness ◽  
Atomic Force Microscope ◽  
Clinical Relevance ◽  
Ceramic Surface ◽  
Surface Smoothness ◽  
Atomic Force ◽  
Ceramic Surfaces ◽  
Ceramic Restorations

Clinical Relevance Ceramic restorations often require intraoral adjustment and the use of a polishing kit is mandatory to re-establish surface smoothness. When the ceramic surface was ground and polished, the 3 types of ceramic restorations reacted differently to each tested polishing kit. Some of the polished surfaces obtained were at least equivalent to glaze-fired ceramic surfaces.

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