Effect of Accelerated Aging on the Color Stability of Light-cured Res-in Cement and Flowable Composite Through Porcelain 
Laminate Veneer

Ganjkar, Maryam Hoorizad; Heshmat, Haleh; Gholamisinaki, Mahdis; Arjomand, M Emami

doi:10.30699/jidai.29.3.103

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…TC showed the greatest changes in ΔL*, Δa*, and Δb* values after accelerated arti cial aging, this may be attributed to the presence of Bis-GMA in its composition. 27 As the present study was limited to in-vitro conditions, further in-vivo studies are needed to test the clinical e ciency and color stability inside patients' mouth. The limitation of the aging process time used to replicate the clinical lifetime of the dental prosthesis is another limitation of the current study.…”

Section: Discussionmentioning

confidence: 99%

“…According to the manufacturer of the arti cial ageing weathering machine, 300 hours inside it is equivalent to one year of clinical service. [26][27][28] Therefore, the aim of this study was to evaluate the color stability of TC, CT, VE, and EM after accelerated arti cial aging by means of weathering process. The null hypothesis was that accelerated arti cial aging would not affect the nal color of different CAD-CAM materials.…”

Section: Introductionmentioning

confidence: 99%

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Effect of accelerated artificial aging on color stability of CAD-CAM materials

Magdy,

Samhan,

Shokry

2023

Preprint

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Objective: The purpose of this study was to compare the effect of accelerated artificial aging using weathering process on color stability of computer-aided design and computer-aided manufacturing (CAD-CAM) materials. Materials and Methods: Four CAD-CAM materials were tested; Nano hybrid CAD-CAM composite (Tetric CAD “TC”) , hybrid ceramic (Vita Enamic “VE”), Advanced Lithium disilicate (CEREC Tessera “CT”) and Lithium disilicate (IPS e.max CAD “EM”) . Each group material contains nine samples (n=9). Color measurements of the four materials were assessed before and after accelerated aging in weathering machine for 300 hours using a spectrophotometer based on CIE L*a*b* relative to the standard illumination D65. Color difference was obtained using the formula ∆E=[(∆L*)2+(∆a*) 2+(∆b*) 2]½. Statistical analysis was done using one - way ANOVA and Kruskal-Wallis tests (a=0.05). Results: There was a statistically significant difference between ΔE of CAD-CAM materials. TC showed the highest mean ∆E (4.29) while there was no statistical significance difference between ∆E of VE, CT and EM (3.02, 3 and 2.94 respectively). Conclusions: Artificial accelerated aging caused clinically unacceptable color changes in TC, while it caused perceptible but clinically acceptable color changes in VE, CT, and EM. Chemical composition could influence the change in color of the material. Clinical Significance: When color stability with weathering process is considered; advanced lithium disilicate, lithium disilicate and hybrid ceramic with high color stability may be a better choice than nano hybrid CAD/CAM composite, especially when being used in the anterior esthetic zone.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of accelerated artificial aging on color stability of CAD-CAM materials

Magdy,

Samhan,

Shokry

2023

Preprint

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“…26,31 IPS emax and Vita enamic showed slight decrease in a in Tetric CAD after artificial aging may be attributed to the presence of Bis-GMA in its composition. 33 The limitation of this study that was…”

Section: B) δL δA and δBmentioning

confidence: 91%

“…3,25,26,31 According to the manufacturer of the artificial ageing weathering machine, 300 hours inside it is equivalent to one year of clinical service. 3,8,32,33 Therefore, the purpose of this study was to evaluate the color stability of Tetric CAD, and Vita Enamic compared to IPS e.max CAD after artificial accelerated aging by means of weathering process. The null hypothesis was that there was no significant difference between the three investigated materials in terms of color change after artificial accelerated aging.…”

Section: Introductionmentioning

confidence: 99%

Color Stability of Three Different Types of Monolithic CAD/CAM Esthetic Restorations After Exposure to Artificial Accelerated Aging (An In-vitro study)

Abdelhalim

Samhan

Shokry

2023

Journal of Fundamental and Clinical Research

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Background: CAD/CAM Composite is one of the esthetic milled restorations. It has high esthetic properties and modulus of elasticity close to that of dentin. The color stability of composite CAD/CAM restorations is still under investigation. Aim: To evaluate the color stability of milled nano-hybrid composite and hybrid ceramic compared to lithium disilicate after Artificial Accelerated Aging. Materials and Methods: Twenty seven disc-shaped samples (10mm X 2mm) were fabricated in standardized manner. Samples were divided into three equal groups (n=9) according to the material type: Lithium disilicate ceramic (IPS e.max CAD), Hybrid Ceramic (Vita Enamic) and Nano-hybrid CAD/CAM composite (Tetric CAD). Color measurements of the three milled materials were assessed before and after Artificial Accelerated Aging (AAA) in weathering machine for 300 hours using a spectrophotometer based on CIE L*a*b* relative to the standard illumination D65. Color difference was obtained by calculating the difference in color measurements of the specimens before and after accelerated aging using the formula ∆E=[(∆L*) 2 +(∆a*) 2 +(∆b*) 2 ] ½ . Results: There was a statistically significant difference between ΔE of different ceramic types. Tetric CAD showed the highest mean DE (4.29) while there was no statistical significance difference between Vita Enamic and IPS e.max CAD (3.02 and 2.94 respectively). Conclusion: Artificial accelerated aging caused clinically unacceptable color changes in Tetric CAD, while it caused perceptible but clinically acceptable color changes in Vita Enamic and IPS e.max CAD. Color changes after artificial aging is related to the chemical composition of the material.

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“…ΔE units is used to represent the amount of difference in color between the colors being compared. The following formula is used to get the total color difference using the coordinates L*, a*, and b*: 15,16 ΔE= […”

Section: Color Stability Measurementmentioning

confidence: 99%

The Effect of Hydrothermal Aging on The Color Stability of Gradient Zirconia. In Vitro Study

Ramadan,

Zaghloul,

Hamza

2024

Ain Shams Dental Journal

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The study aims to assess the influence of hydrothermal aging on gradient zirconia's microstructure and color stability. Materials and methods: Ten discs were constructed from gradient zirconia blanks (3Y-TZP-5Y-TZP) using CAD\CAM technology. Hydrothermal aging was done in an autoclave. Color parameters (a*, b*, L*) for each disc was measured using a spectrophotometer. In order to investigate the zirconia specimens' crystalline structure, X-ray diffraction (XRD) was performed. Color stability and microstructural changes were examined before and after the aging process. Results: Following hydrothermal aging, a statistically significant decrease in the mean (L*) value was found. However, following hydrothermal aging, a statistically significant increase in the mean (a*) and (b*) values was reported. Regarding the microstructure, hydrothermal aging did not result in any significant changes. Conclusion: Artificial aging has led to color changes in gradient zirconia that were in the clinical acceptability range but has no impact on the microstructure of gradient zirconia.

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Effect of Accelerated Aging on the Color Stability of Light-cured Res-in Cement and Flowable Composite Through Porcelain Laminate Veneer

Cited by 7 publications

References 22 publications

Effect of accelerated artificial aging on color stability of CAD-CAM materials

Effect of accelerated artificial aging on color stability of CAD-CAM materials

Color Stability of Three Different Types of Monolithic CAD/CAM Esthetic Restorations After Exposure to Artificial Accelerated Aging (An In-vitro study)

The Effect of Hydrothermal Aging on The Color Stability of Gradient Zirconia. In Vitro Study

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