The effect of light sources and CAD/CAM monolithic blocks on degree of conversion of cement

Çetindemir, Aydan Boztuna; Şermet, Bülent; Öngül, Değer

doi:10.4047/jap.2018.10.4.291

Cited by 9 publications

(14 citation statements)

References 24 publications

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“…Cetindemir et al evaluated the effect of light sources and CAD/CAM monolithic blocks on the degree of conversion (DC) of cement, which is associated with the translucency of CAD/CAM materials (10). They reported significantly different DC values for GC Cerasmart and Vita Enamic, which have similar filler profiles and organic and inorganic contents, and explained that this difference was caused by the nanoparticle and aluminum contents.…”

Section: Discussionmentioning

confidence: 99%

“…Another currently employed CAD/CAM material is GC Cerasmart (GC Corparation, Tokyo, Japan), which comprises 71% ceramic and barium glass nanoparticles by weight and is based on nanotechnology (9). In addition, Vita Suprinity (Vita P r o f f Zahnfabrik H. Rauter, Bad Säckingen, Germany), a zirconia-reinforced lithium silicate ceramic containing 8%-12% zirconium oxide, 56%-64% silicone dioxide, and 15%-21% lithium oxide, has been used because of its high strength (10,11).…”

Section: Introductionmentioning

confidence: 99%

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Effects of Glazing Procedures on the Color Stability of Conventional and CAD/CAM Hybrid Ceramics: A Comparative Study

Ozyilmaz¹,

Özel²,

Ahmet³

2019

meandros

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Objective: Ceramic glazing and polishing are important for patient satisfaction and long-term clinical success. Till date, no study has compared color changes after glazing procedures between conventional and more recently introduced ceramics. In this study; we investigated the effects of glazing procedures on the color stability of conventional and CAD/CAM hybrid ceramics using a spectrophotometer. Materials and Methods: Eighty-four disc-shaped specimens were fabricated with seven different dental porcelain materials according to the manufacturers' instructions (n = 12 each): Ivoclar IPS DSign, Vita Omega 900, Ceramco III, Vita Mark II, Vita Enamic, GC Cerasmart, and Vita Suprinity. Both sides of the specimens were polished with wet 600-, 1000-, and 1500-grit aluminium oxide abrasive papers, and color values (L*, a*, b*) were measured using a spectrophotometer before and after glazing. Treatmentinduced changes in the specimen color and topography were evaluated and recorded. The color change (∆E) was calculated from the changes in the mean L*, a*, and b* values. All data were analyzed using Kruskal-Wallis, Mann-Whitney U, and Wilcoxon tests (95% confidence level). Results: Color changes were below the clinically perceptible level (∆E, <3.7) in all specimens. Color change values after the glazing procedures were 2.27 ± 0.55, 2.99 ± 0.67, 1.01 ± 0.58, 1.62 ± 0.70, 0.74 ± 0.45, 1.35 ± 0.52, and 1.37 ± 0.72 for Ivoclar IPS DSign, Vita Omega 900, Ceramco III, Vita Mark II, GC Cerasmart, Vita Enamic, and Vita Suprinity, respectively; thus, there were significant differences between the conventional and CAD/CAM ceramics (p<0.05). The conventional ceramic Vita Omega 900 presented the least color stability, while the CAD/CAM ceramic GC Cerasmart presented the maximum color stability. Conclusions: Glazing procedures do not cause evident changes in the color of conventional and CAD/CAM hybrid ceramics, although the color stability of the latter is better than that of the former.Amaç: Seramik glaze ve parlatma işlemleri hasta memnuniyeti ve uzun süreli klinik başarı için önemlidir. Bugüne kadar hiçbir çalışma, geleneksel ve daha yeni tanıtılan seramikler arasındaki glaze işlemlerinden sonra renk değişimlerini karşılaştırmamıştır. Bu çalışmada glaze prosedürlerinin bir spektrofotometre kullanarak geleneksel ve CAD/ CAM hibrit seramiklerin renk stabilitesi üzerindeki etkilerini araştırılmıştır.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Glazing Procedures on the Color Stability of Conventional and CAD/CAM Hybrid Ceramics: A Comparative Study

Ozyilmaz¹,

Özel²,

Ahmet³

2019

meandros

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“…The CAD/CAM technology was used to develop high-loading capacity hybrid ceramics, merging ceramic and glass polymers [ 9 ]. Vita Enamic consists of 86% ceramic and 14% polymer by volume.…”

Section: Introductionmentioning

confidence: 99%

“…Vita Suprinity is a zirconia-reinforced lithium silicate ceramic comprising 8–12% zirconium oxide, 56–64% silicone dioxide, and 15–21% lithium oxide. These materials are favored for their good mechanical properties [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Color Stainability of Computer-Aided Design and Computer-Aided Manufacturing (CAD/CAM) Ceramic Materials After Hot and Cold Coffee Immersion at Different Time Intervals

et al. 2021

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Background This spectrophotometric study assessed the color stability of CAD/CAM restorative materials with different exposed surfaces following staining by hot Arabic Qahwa and cold coffee. Material/Methods Ninety-six specimens were fabricated from 3 different CAD/CAM ceramic materials: Vita Suprinity (Vita-S), Vita Enamic (Vita-E), and Vitablocs Mark II (Vitablocs-MII). We divided 32 specimens for each group into glazed or polished surfaces, with 16 specimens in each group, then subdivided them according to staining materials: Arabic Qahwa and Frappuccino Cold Coffee. Color of specimens was measured during immersion in staining materials (BEFORE) as baseline with (Vita classic) and (L, a, b), for average color changes (ΔE 00 ), then remeasured after 2, 4, and 12 weeks, and described as 1 st , 2 nd , and 3 rd measurements for VITAPAN Classic shade and T1, T2, and T3 for ΔE 00 values using the CIE L*a*b* equation. We performed ANOVA and then post hoc testing. Results We found significant differences in ΔE 00 values during immersing in hot Arabic Qahwa and cold coffee for tested materials in glazed or polished specimens. Polished specimens of Vita-S and Vita-E had the highest color changing and staining compared to glazed surfaces. Vitablocs-MII had the best color stability through immersion periods. Moreover, there were changes in relation to VITAPAN Classic shade guide for both Vita-S and Vita-E specimens during different immersion periods. Conclusions Coffee caused staining and contamination of ceramic material. Values of ΔE 00 for tested ceramic materials were significantly different but were within the clinically acceptable range. Polished specimens showed higher staining; therefore, we highly recommend re-glazing of ceramic restorations to maintain color stability.

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“…There are key differences in crystal distribution, shape and size between pressed and CAD-CAM restorations, all of which are prone to affect the transmittance of the structure 8,9 . One of the most important factors related to clinical success of glass ceramics is the achievement of durable bonding between dental tissues and the restorative unit through a composite-based luting material (CBLM) of adequate mechanical properties 10 . To ensure effective adhesive interaction, not only surface treatments of both substrates, but also an adequate activation of the polymerization in the composite organic matrix, are key factors 1,[11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Transmittance of lithium disilicate ceramic of different thicknesses and opacities with different curing units

García-Cuerva¹,

Boaventura-Dubovik²,

Iglesias³

2021

Acta Odontol Latinoam

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The aim of this study was to evaluate the amount of radiating energy transmitted through lithium disilicate discs of different thicknesses and opacities with different curing units (CU). Discshaped specimens 8 mm in diameter and 1.5 mm or 0.7 mm thick were designed with Zbrush® and Cura 3D® software, milled from HT and MO IPS e-maxCAD blocks (Ivoclar Vivadent) with Ceramill Mikro 4 (Amann Girrbach, Austria) and processed according to manufacturer instructions. Thickness was checked with a Mitutoyo (México) caliper. Four groups (n=4) were formed: G1(HT/1.5 mm), G2(MO/1.5 mm), G3(HT/0.7 mm) y G4(MO/0.7 mm), and the effect of three CUs: Coltolux (ColteneWhaledent), LED.C, (Woodpecker Medical Instrument Co.Ltd) and Deepcure L(3M-ESPE) was tested Measurements were taken with a halogen and LED radiometer (Woodpecker® LM-1-Guilin Woodpecker Medical Instrument Co.Ltd) after applying the guide of each CU directly on the reading window (d) and after interposing each of the specimens. The ratio of transmitted energy was determined in each case and data was analyzed with repeated measures ANOVA and Tukey test for multiple comparisons. LED.C: d:1600 mW/cm2, G1: 0.31(0.00), G2: 0.14(0.00) G3: 0.54(0.01), G4: 0.38(0.01); Deepcure L: d:1500 mW/cm2, G1: 0.34(0.01), G2: 0.20(0,00), G3: 0.56(0.01), G4: 0.41(0.02); Coltolux: d:1275 mW/cm2, G1: 0.44(0.01), G2: 0.24(0,00), G3: 0.65(0.01), G4: 0.47(0,00). Statistically significant differences were found among the curing units (P<0.001) and for the interaction CU-thickness (P<0.001) CU-opacity (P=0.023). Within the conditions of this study, the ratio of light transmitted through lithium disilicate structures is related to their thickness and opacity, and to the curing unit employed.

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The effect of light sources and CAD/CAM monolithic blocks on degree of conversion of cement

Cited by 9 publications

References 24 publications

Effects of Glazing Procedures on the Color Stability of Conventional and CAD/CAM Hybrid Ceramics: A Comparative Study

Effects of Glazing Procedures on the Color Stability of Conventional and CAD/CAM Hybrid Ceramics: A Comparative Study

Assessment of Color Stainability of Computer-Aided Design and Computer-Aided Manufacturing (CAD/CAM) Ceramic Materials After Hot and Cold Coffee Immersion at Different Time Intervals

Transmittance of lithium disilicate ceramic of different thicknesses and opacities with different curing units

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