Influence of monolithic lithium disilicate and zirconia thickness on polymerization efficiency of dual‐cure resin cements

Turp, Volkan; Türkoğlu, Pınar; Şen, Deniz

doi:10.1111/jerd.12390

Cited by 22 publications

(38 citation statements)

References 47 publications

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“…The second reason is that the light beam was perpendicular to the SADRC in C groups and angled in the A and B groups, and perpendicular light has been recommended in the literature [38]. Finally, the ceramic thickness may affect the light energy delivery [17]. Because of the existing of cusp inclination, the actual thickness of the light transmitted through zirconia was furthest in A groups, a moderate distance in B groups, and shortest in C groups.…”

Section: Discussionmentioning

confidence: 99%

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In Vitro Cytotoxicity of Self-Adhesive Dual-Cured Resin Cement Polymerized Beneath Three Different Cusp Inclinations of Zirconia

Zhang

Cheng

Tong

et al. 2019

BioMed Research International

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The aim of the present study was to evaluate the in vitro cytotoxicity of self-adhesive dual-cured resin cement (SADRC) polymerized beneath three different cusp inclinations of zirconia with different light curing time. A commercial SADRC (Multilink Speed) was polymerized beneath zirconia (ZrO2) with three different cusp inclinations (0°, 20°, and 30°) for 20 s or 40 s. After being stored in light-proof box for 24 h, the ZrO2-SADRC specimens were immersed in DMEM for 72 h and then we got the extract solution, cultured the human gingival fibroblasts (HGF, 8 × 103 per well) with 100% or 50% concentrations of the extract solution for 24 h, 72 h, and 120 h, respectively, and evaluated cytotoxicity of the polymerized SADRC with CCK-8 assay in optical density (OD) values, relative growth rates (RGR), and cytotoxicity grades. Statistical analysis was conducted using a two-way ANOVA followed by post hoc Student–Newman–Keuls test. The OD values varied from 0.8930 to 3.2920, the RGR varied from 33.93% to 98.68%, and the cytotoxicity grades varied from 0 to 2. There was significant difference in the OD values among the different cusp inclinations of zirconia (P < 0.001), and there was significant difference in the OD values between the different light curing times in some situations (P < 0.05). The cusp inclination of zirconia affects the in vitro cytotoxicity of SADRC. Prolonging the light curing time from 20 s to 40 s can reduce the in vitro cytotoxicity of SADRC when the cusp inclination of zirconia is smaller than 20°.

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Section: Discussionmentioning

confidence: 99%

“…It affects the polymerization efficiency of dual-cured resin cement through high translucent zirconia [13]. In addition, curing time [14], type of light curing unit [15], type of initiator [16], the type [17], and thickness [18] of the restoration can influence the polymerization of dual-cured resin cement.…”

Section: Introductionmentioning

confidence: 99%

In Vitro Cytotoxicity of Self-Adhesive Dual-Cured Resin Cement Polymerized Beneath Three Different Cusp Inclinations of Zirconia

Zhang

Cheng

Tong

et al. 2019

BioMed Research International

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“…Schematic showing the method of preparation for dual-cure resin cement samples [17]. “Figure reproduced from Turp et al (2018) [under the Creative Commons Attribution License/public domain]”.…”

Section: Figurementioning

confidence: 99%

Evaluation of Dual-Cure Resin Cement Polymerization under Different Types and Thicknesses of Monolithic Zirconia

Türkoğlu

Şen

2019

BioMed Research International

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Purpose The aim of the present study was to investigate the effects of the type and thickness of the zirconia material on the microhardness of the underlying dual-cure resin cement. Materials and Methods Eight disk-shaped zirconia specimens with a 4-mm diameter and four varying thicknesses (0.5, 1.0, 1.5, and 2.0 mm) were fabricated from two different monolithic zirconia materials: posterior monolithic zirconia (Prettau) and anterior monolithic zirconia (Prettau Anterior). Dual-cure resin cement specimens with a 4-mm diameter and 5-mm height were prepared using Teflon cylinder molds and activated by light beneath the eight zirconia disks and without any zirconia disk for 20 s (n=12). A total of 108 specimens were embedded in acrylic. Vickers hardness of each specimen was measured at three different depths using a microhardness device with a 50-g load. All data were statistically evaluated using three-way ANOVA, one-way ANOVA, independent samples t-tests, and Bonferroni corrected post hoc tests (α=.05). Results Dual-cure resin cement's microhardness was significantly higher for the samples polymerized beneath anterior monolithic zirconia compared to posterior monolithic zirconia. The hardness decreased as the thickness increased for both types of zirconia; the latter was attributed to an attenuated curing efficiency. Conclusion Microhardness of the dual-cure resin cement is influenced by both the type and the thickness of the monolithic zirconia restoration. Polymerization efficiency for resin cement cured under anterior monolithic zirconia may be superior to cured beneath posterior monolithic zirconia.

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“…An inadequate conversion of the monomers to polymers results in a low degree of conversion, which increases the water sorption and solubility of the resin cement, therefore impairing the clinical longevity of these restorations [14]. When not properly polymerized, resin cements are prone to mechanical change [2, 3, 16], dimensional instability, and microleakage [17], as well as reduced adhesion to the dental structures [18]. These, in turn, cause a reduction in biocompatibility [19], color changes [20, 21] and postoperative sensitivity [22].…”

Section: Introductionmentioning

confidence: 99%

“…The thickness, shade, composition, and translucency of the ceramics can also influence light transmission and, consequently, the degree of conversion of the resin cements [12, 13, 23]. Some studies have demonstrated the influence of different ceramic materials and their thickness on degree of conversion or, separately, the Vickers microhardness of resin cements [12, 15, 16, 18]. However, assessing these factors using the irradiance power test can objectively demonstrate how the photopolymerization light interacts with the resin cement.…”

Section: Introductionmentioning

confidence: 99%

Influence of feldspar ceramic thickness on the properties of resin cements and restorative set

Blumentritt

Cancian

Saporiti

et al. 2021

European J Oral Sciences

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This in vitro study evaluated the influence of feldspathic ceramic thickness on the properties of light‐ and dual‐cured resin cements. For each cement (RelyX Veneer, Allcem Veneer, RelyX Ultimate, and Allcem Dual), three ceramic specimens were prepared, with seven thicknesses for each (0.5, 1.0, 1.5, 2.0, 2.5, 3.0, and 3.5 mm). The degree of conversion, Vickers microhardness, irradiance power, color variation (ΔE00), and translucency parameters were assessed. Microhardness and irradiance power were analyzed using analysis of variance (ANOVA) with post hoc Tukey's test, while ΔE00, translucency parameters, and degree of conversion were analyzed using ANOVA of ranks with post hoc Duncan's Multiple Range Test. The relationship between each of the dependent variables (degree of conversion, ΔE00, and translucency parameter tests) and the specimen thickness was described using linear regression for each of the four resin cements. The significance level for all analyses was set at 5%. RelyX Ultimate yielded the lowest degree of conversion values among all resin cements. Allcem Veneer produced the lowest microhardness values, without statistical differences between thicknesses, of up to 1 mm. Allcem Dual produced the highest ΔE00 and translucency parameter values. Feldspathic ceramic thickness influenced the mechanical properties of resin cements and optical aspects of the restorative set.

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Influence of monolithic lithium disilicate and zirconia thickness on polymerization efficiency of dual‐cure resin cements

Cited by 22 publications

References 47 publications

In Vitro Cytotoxicity of Self-Adhesive Dual-Cured Resin Cement Polymerized Beneath Three Different Cusp Inclinations of Zirconia

In Vitro Cytotoxicity of Self-Adhesive Dual-Cured Resin Cement Polymerized Beneath Three Different Cusp Inclinations of Zirconia

Evaluation of Dual-Cure Resin Cement Polymerization under Different Types and Thicknesses of Monolithic Zirconia

Influence of feldspar ceramic thickness on the properties of resin cements and restorative set

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