Assessment of Accuracy of Different Cad/Cam Fabricated Porcelain Laminate Veneers

Basheer, Rasha Ramadan; El-Sayed, Salwa M.; Bahgat, Sherif

doi:10.21608/edj.2017.76442

Cited by 8 publications

(9 citation statements)

References 26 publications

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“…Regardless cementation, it was found that the highest statistically significant marginal gap values were recorded with E.max CAD, followed by Celtra Duo, while the lowest statistically significant marginal gap distance values were for VITA Suprinity. This was in agreement with some studies which proved that the E.max CAD specimens recorded higher vertical marginal gap mean values than that obtained with VITA Suprinity specimens (21) . This may be attributed to difficulties during restoration designing regarding scanning, digitization, and the milling process, milling burs size and the condition of the material during the milling procedure (22)(23)(24) .…”

Section: Discussionsupporting

confidence: 93%

Marginal Accuracy and Microleakage of Machinable Laminate Veneers

Ahmed¹,

Essam

Saleh

et al. 2020

ADJ-for Girls

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Purpose:The current study aimed to evaluate the marginal accuracy and microleakage of machinable laminate veneers. Materials and Methods: Twentyfour human maxillary central incisor teeth were collected and prepared (butt-joint preparation) to receive laminate veneers. They were divided into three groups (n=8) according to material of construction: Group I: IPS-Emax CAD, Group II: Vita Suprinity, Group III: Celtra-Duo. The veneers were milled from the blocks in a CEREC 3 Machine. All veneers were cemented with resin cement. All samples had been subjected to 1500 thermal cycles which are equivalent to one year and half of clinical use. Marginal gap (pre and post cementation) and microleakage were detected for all samples. Data were tabulated and statistically analyzed. Results: Regarding vertical marginal gap, E max CAD showed the highest mean value followed by Celtra Duo, while the lowest mean value was found in Vita Suprinity. The mean values before cementation were higher than after cementation. Regarding microleakage, the highest mean value was found in E max followed by Celtra Duo, while the lowest mean value was found in Vita Suprinity. Leakage at cervical margins showed higher mean values than incisal one. Conclusion: Under the test conditions, the following was concluded: Zirconia reinforced Lithium silicate restorations, particularly the partially crystalline form, introduced better marginal accuracy and microleakage than Lithium disilicate restorations. There is a direct correlation between marginal accuracy and microleakage.

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Section: Discussionsupporting

confidence: 93%

Marginal Accuracy and Microleakage of Machinable Laminate Veneers

Ahmed¹,

Essam

Saleh

et al. 2020

ADJ-for Girls

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“…33 The first null hypothesis was rejected as there was significant difference regarding the marginal adaptation of occlusal veneers made of different materials. Celtra Duo showed lower marginal gap compared to IPS e.max CAD occlusal veneers, this result came in accordance with Ahmed, et al, (2020) (34) and Basheer, et al, (2017) 35 . Celtra Duo microstructure as claimed by the manufacturer to present high edge stability providing acceptable margins.…”

Section: Discussionsupporting

confidence: 85%

Assessment of Marginal Adaptation of Two CAD/CAM Glass Ceramic Occlusal Veneers at Different thickness After Thermodynamic aging

Abouhagar¹,

Salma

Fahmy

2022

MSA Dental Journal

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Background: Occlusal veneers fabricated with different materials and thicknesses can reveal different marginal adaptation after thermodynamic aging.Methodology: Extracted maxillary premolar teeth (n=28) were collected and embedded in epoxy resin block with light body material then randomized according to materials into two groups (n=14): Lithium disilicate IPS e.max CAD (A) and Zirconia reinforced lithium silicate Celtra Duo (B) then further randomized into four subgroups (n=7) according to occlusal veneer thicknesses 1 mm and 1.5 mm. Teeth were prepared by a customized milling machine then the exposed dentine was immediately sealed by dentine bonding agent. Fabrication of the occlusal veneers was done by CAD/CAM milling machine. Occlusal veneers were adhesively cemented by dual cure resin cement (Panavia F 2.0). All samples were subjected to thermocycling and cyclic loading equivalent to one year of service (150,000). Marginal gap measurements then were done with A digital microscope at 35x magnification was used to photograph each specimen. Marginal gap was measured and evaluated using a computerized image analysis system.Results: two-way ANOVA showed that the materials only IPS e.max CAD (39.30±5.14) had significantly higher value than Celtra Duo (31.52 ± 5.69) (p<0.001).While regarding the thicknesses 1 mm thick samples (36.78 ± 6.06) had significantly higher value than 1.5 mm thick samples (34.04 ± 7.02) (p=0.020). Conclusion:Zirconia reinforced lithium silicate (Celtra DUO) occlusal veneers showed better marginal adaptation than lithium disilicate (IPS e.max CAD) in different thicknesses. Zirconia reinforced lithium silicate (Celtra DUO) marginal adaptation was influenced by occlusal veneer thickness (the thicker 1.5 mm showed better adaptation than 1mm.

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“…Regardless of cementation, it was found that the highest statistically significant marginal gap values were recorded with E-max followed by Celtra duo, followed by VITA Suprinity, while the lowest statistically significant marginal gap distance values were for VITA Enamic. This was in agreement with some studies which proved that the E.max CAD specimens recorded higher vertical marginal gap mean values than that obtained with VITA Enamic specimens (17) . This may be attributed to geometrical design of the restoration and difficulties regarding scanning, digitization, and the milling process of brittle ceramic material.…”

Section: Discussionsupporting

confidence: 93%