Influence of ceramic thickness and polymerization mode of a resin luting agent on early bond strength and durability with a lithium disilicate–based ceramic system

Akgüngör, Gökhan; Akkayan, Begüm; Gaucher, Hubert

doi:10.1016/j.prosdent.2005.04.020

Cited by 52 publications

(64 citation statements)

References 19 publications

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“…In this study, the specimens had two different thicknesses (0.5 mm and 0.7 mm). It can be observed from the results that the use of the 0.7-mm thickness of ceramic specimens decreased the ∆E values when compared with the 0.5-mm thickness, which could be due to the translucency, since the thicker the porcelain, the less the translucency 33) . The thickness of cement was controlled at 0.1 mm in the study, because different thicknesses of cement might influence the final color of the veneer restoration, and this thickness was suitable for internal fit of the veneer restoration, as recommended by some studies for analyzing the stress distribution of the interface between ceramic and resin cement 34,35) .…”

Section: Discussionmentioning

confidence: 88%

The effects of different shades of resin luting cement on the color of ceramic veneers

2012

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The purpose of this study was to quantitatively evaluate the effects of different shades of light-polymerized resin cement on the color of two different thicknesses (0.5 mm and 0.7 mm) of three different ceramic materials (Esthetic, e.max, and ZirPress). A spectrophotometer (Color Eye 7000A -CIE (L*a*b*) was used to measure the color of specimens on the control substrate without cement, and then on (Translucent, White Opaque, B0.5, A1, and A3 of RelyX™ Veneer cement). The mean values of color difference (∆E) were higher for Esthetic, followed by ZirPress, with the lowest values for e.max. The mean values of ∆E decreased when the thickness of ceramic increased from 0.5 mm to 0.7 mm. It was observed that the White Opaque had significantly increased ∆E values when compared with (TR, B0.5, A1, and A3), whereas no significant difference between B0.5 and TR, and between B0.5 and A3.

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Section: Discussionmentioning

confidence: 88%

The effects of different shades of resin luting cement on the color of ceramic veneers

2012

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“…This process increases the strength of the ceramic. 25 This condensed crystal structure of IPS Empress II increases the strength against fracture, tensile forces and chemical substances. 26 In addition to the chemical composition and physical properties, the microstructure of IPS Empress II is different from IPS Empress, especially the core structure.…”

Section: Introductionmentioning

confidence: 99%

Two-year Clinical Evaluation of IPS Empress II Ceramic Onlays/Inlays

Tağtekin¹,

Özyöney²,

Yanıkoğlu³

2009

Operative Dentistry

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SUMMARYThe stronger the ceramic material, the longer the restoration stays in the mouth. The current study evaluated the two-year clinical performance of a strong ceramic system, IPS Empress II, with increased strength on onlay/inlay restorations of molars.Teeth from 35 patients, including three premolars and 32 molars, were prepared for 28 onlay and seven inlay restorations with IPS Empress II ceramics. The restorations were cemented with a highly viscous, dual-curing luting composite cement (Bifix) and evaluated by two examiners using USPHS criteria at baseline (one week following insertion), six months, one year and two years.The baseline scores and recalls were assessed by Wilcoxon signed rank test. Statistically significant marginal discoloration at the Bravo level was found at the 12-and 24-month recalls (p=0.046). One debonding was statistically insignificant.No changes were observed with respect to anamnesis, such as any symptom from the TMJ or masticatory muscles. No restorations were replaced due to hypersensitivity or were missing at the two-year evaluation. Any wear on the restoration, antagonist tooth or any changes of proximal contacts were not observed. IPS Empress II Ceramics were found to be appropriate as onlay/inlay restorations for clinical use under the conditions of the current study. INTRODUCTIONAs demand for esthetic restorations in posterior teeth has expanded, the number of restorations using resin Clinical RelevanceThe two-year success rate of restorations reported in the current study demonstrates that IPS Empress II ceramics are clinically acceptable for onlay/inlay restorations on molars.

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“…An important aspect to be considered is the monomer's degree of conversion which affects the physico-chemical properties including strength, stiffness, water absorption, biocompatibility as well as color stability. Post-operative sensitivity has also been reported as a possible consequence of inadequate polymerization of the resin cement [2][3][4][5][6][7][8][9][10][11][12][13] . The use of dual-curing resin cements intends to combine chemical and light-polymerization and at the same time allowing polymerization to take place in deeper areas of the tooth cavity applying shorter light irradiation time.…”

Section: Introductionmentioning

confidence: 99%

Dual-curing, self-adhesive resin cement: influence of the polymerization modes on the degree of conversion and microhardness

et al. 2010

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RelyXTM Unicem, dual-curing self-adhesive resin cement, was tested in order to evaluate the degree of conversion (DC) and Vickers microhardness (VMH). The specimens were prepared into 4 groups (GR). For GR1, the specimens were irradiated with 500 mW.cm -2 during 20 seconds while for GR3 the same intensity was used but the irradiation time was 40 seconds. The GR2 followed the same polymerization mode of the GR1 but a ceramic disk was applied as a light barrier. For the last group, only the chemical polymerization was carried out. The DC and VMH were measured immediately after the irradiation time and again after 24 hours. Dual-polymerization (light and chemical polymerization) showed higher DC and VMH than the chemical polymerization (dark cure). The presence of a ceramic disk did not affect the DC but reduced the VMH. Increasing the exposure to light, the DC remained almost constant whereas the VMH raised slightly indicating that the VMH is quite dependent on the incident energy. Additionally, the powder/liquid portions of the cement were also characterized. The TG showed that the solid fraction was constituted of 96% of inorganic matter and 4% of vinyl-silane, a coupling agent. Regarding the liquid part, it was found that 84% was related to the mixture of monomers. The SEM revealed that the size particle of the inorganic fillers were between 400 and 11.000 nm. Factors such as energy density, size and distribution of inorganic fillers and the low effectiveness of the chemical cure contributed to the low values of the DC and VMH.

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Influence of ceramic thickness and polymerization mode of a resin luting agent on early bond strength and durability with a lithium disilicate–based ceramic system

Cited by 52 publications

References 19 publications

The effects of different shades of resin luting cement on the color of ceramic veneers

The effects of different shades of resin luting cement on the color of ceramic veneers

Two-year Clinical Evaluation of IPS Empress II Ceramic Onlays/Inlays

Dual-curing, self-adhesive resin cement: influence of the polymerization modes on the degree of conversion and microhardness

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