Evaluation of the light transmission of chairside polymer infiltrated hybrid ceramics in different shades and thicknesses

Duran, İbrahim; Kaleli, Necati; Ural, Çağrı; Kavut, İdris

doi:10.1177/2280800018807109

Cited by 8 publications

(11 citation statements)

References 30 publications

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“…This effect increases at a faster rate for the zirconia‐based products than for feldspathic ceramic, 25 which might explain the results obtained. Although some studies have described no difference in irradiance among feldspathic and lithium disilicate ceramics, different ceramic shades and methods for assessing irradiance were used, 7,44 which might have influenced the results 16,17,19,21,43,44 . Furthermore, EN also has a feldspathic ceramic network, 28 and yet obtained much lower irradiance compared to the pure feldspathic ceramic (Table 2), as observed in previous findings 21,44 .…”

Section: Discussionmentioning

confidence: 68%

Effect of thickness of CAD/CAM materials on light transmission and resin cement polymerization using a blue light‐emitting diode light‐curing unit

Castro

Fronza

Soto‐Montero

et al. 2022

J Esthet Restor Dent

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Objective: Evaluate the effect of thickness of high-translucency (HT) CAD/CAM materials on irradiance and beam profile from a blue light-emitting diode light-curing unit (LCU) and on the degree of conversion (DC) and maximum polymerization rate (Rp max ) of a light-cured resin cement (LCC). Material and methods:The direct output from the LCU, the light transmission and irradiance ratio (IR) through one conventional composite and nine HT CAD/CAM materials (0.5, 1.0, 1.5, or 2.0-mm thick; n = 5) were measured with a integrating sphere coupled to a spectrometer. The light beam was assessed with a beam profiler camera. The DC at 600 s and the Rp max of one LCC was determined using a Fourier transform infrared spectrometer (n = 5). Data were analyzed by ANOVA followed by Tukey's tests, and Dunnett's test was also used for irradiance data (α = 0.05).Results: A significant decrease in irradiance through all materials occurred as thickness increased. Thin CAD/CAM materials improved light homogeneity, which decreased with the increase in thickness. The DC of the LCC directly exposed to light was the same as when exposed to 45%, 25%, 15%, or 5% IRs. Rp max decreased with the decrease in IR.Conclusions: Although the HT CAD/CAM materials reduced the irradiance from the LCU, minor effects were observed in the LCC's DC.Clinical significance: Despite the light attenuation of blue light through different CAD/CAM materials that were up to 2-mm thick, the degree of conversion of one brand of light-cured resin cement was clinically acceptable when the LCU was used for 30 s.

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Section: Discussionmentioning

confidence: 68%

Effect of thickness of CAD/CAM materials on light transmission and resin cement polymerization using a blue light‐emitting diode light‐curing unit

Castro

Fronza

Soto‐Montero

et al. 2022

J Esthet Restor Dent

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“…Also, an additional study done by Duran et al in 2019 reported that darker ceramic shades with decreased value transmitted less light than lighter ceramic shades. (20) Specimens with 0.5 mm thickness showed higher degree of conversion of resin cement than 1mm thickness specimens. This may be attributed to the fact that increasing ceramic thickness result in light attenuation by the material thus resin cement receives lower light intensity and incomplete polymerization occurs.…”

Section: Discussionmentioning

confidence: 82%

Effect of different lithium silicate ceramics with variable shades, thickness and curing modes on the degree of conversion of resin cement

nagi

2022

Egyptian Dental Journal

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Purpose:The bond strength between ceramics and tooth structure is affected by the degree of polymerization of resin cement. This study evaluated the effect of two light curing modes on polymerization of light cured resin cement through three lithium silicate-based ceramics (Lithium disilicate-reinforced glass ceramic (E.max CAD), Zirconia reinforced Lithium Silicate (Celtra Duo). And Zirconia reinforced Lithium Silicate (Vita Suprinity) with two shades (A2 and B1) and two ceramic thickness (0.5 and 1mm). Materials and methods:Two hundred forty ceramic samples (n=240) were divided into three main groups (n=80) according to the material. Each group was subdivided into 2 subgroups (n=40) according to ceramic shade (A2 and B1). Each subgroup was subdivided into 2 divisions (n=20) according to thickness (0.5mm and 1mm). Then each division was subdivided into two subdivisions (n=10) according to light curing method (Continuous and pulsating light curing). Samples cemented and scanned using OMNIC 5.1c software connected to the FTIR unit. Results:The results illustrated that there was no statistical significance difference in degree of conversion between the three ceramic materials. A higher degree of conversion was recorded with B1 ceramic shade than A2 shade. Also, there was a significant effect on the degree of conversion (DC%) with different thicknesses of the ceramic materials and there was a higher degree of conversion in the continuous light curing mode than the pulsating mode. Conclusions:Within the limitations of this study, the results indicated that with respect to the ceramic thickness used, the ceramic type did not affect the degree of conversion of light cured resin cement. On the other hand, thicknesses up to 1.0 mm have a significant effect on the polymerization of resin cements. Higher degrees of conversion were shown with lighter ceramic shades. Also, mode of light curing had a pronounced effect on the degree of conversion of resin cements (3638)

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“…[8] Regardless of the type of cement used (light-cured or dual-cured), the irradiance reaching the luting material is crucial in the provision of optimal polymerization and physical properties to the resin materials in a clinically viable time. [9,10] The ceramic inserted between the light-curing unit (LCU) and the resin cement will affect the light reaching the cement, thus reducing the irradiance significantly [11,12], and it could affect the polymerization of the luting agent. [3,9,13] The polymerization process is initiated in photo-cured resins by a photosensitizer that generates free radicals when exposed to light.…”

Section: Introductionmentioning

confidence: 99%

Transmission of violet and blue light and current light units through glass-reinforced ceramics with different thicknesses

Lima

2021

J Prosthodont Res

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Purpose: To evaluate the effect of glass-reinforced ceramics (leucite and lithium disilicate) with different thicknesses (1, 2, and 3 mm) on the wavelength and irradiance spectrum of blue and violet lights. In addition, the effect of the ceramics on four current light-curing units (LCUs) was evaluated: a halogen lamp, a single peak LED, and two multi-peak LEDs. Methods: Ceramic discs of different thicknesses (1, 2, and 3 mm) were obtained from computer-aided design and computer-aided manufacturing (CAD-CAM) blocks. The irradiance, radiant exposure, and emission spectrum of the four LCUs were analyzed using a spectrometer-based instrument. To evaluate the violet and blue lights, a specific device that provides a narrow emission spectrum was used. Results: The ceramics reduced the irradiance of all the tested LCUs. However, the wavelength of the transmitted light was only altered slightly. The effect of leucite and lithium disilicate varied according to the type of LCU and thickness of the ceramic disc evaluated. Conclusions: From the results, it could be concluded that the thickness of the leucite and lithium disilicate ceramic significantly reduced the irradiance of the light emitted by the LCUs, with minimal changes on the wavelength spectrum of the lights. The effects of the ceramic on irradiance and transmitted wavelengths of the blue and violet lights was slightly different.

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Evaluation of the light transmission of chairside polymer infiltrated hybrid ceramics in different shades and thicknesses

Cited by 8 publications

References 30 publications

Effect of thickness of CAD/CAM materials on light transmission and resin cement polymerization using a blue light‐emitting diode light‐curing unit

Effect of thickness of CAD/CAM materials on light transmission and resin cement polymerization using a blue light‐emitting diode light‐curing unit

Effect of different lithium silicate ceramics with variable shades, thickness and curing modes on the degree of conversion of resin cement

Transmission of violet and blue light and current light units through glass-reinforced ceramics with different thicknesses

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