ASSESSING THE IMPACT OF SURFACE TREATMENTS ON THE COLOR STABILITY OF 3D PRINTED CERAMIC-REINFORCED RESIN (IN VITRO STUDY) | ||||
| Alexandria Dental Journal | ||||
| Articles in Press, Corrected Proof, Available Online from 05 August 2025 PDF (547.09 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/adjalexu.2025.350563.1581 | ||||
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| Authors | ||||
Ahmed Eshra  1; Ihab Adel Hammad2; Yasser Mohamed Aly3
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| 1Fixed Prosthodontics, Department of Conservative Dentistry, Faculty of Dentistry, Alexandria University. | ||||
| 2Conservative Department, Faculty of Dentistry, Alexandria university,Egypt | ||||
| 3Conservative dentistry department,Faculty of Dentistry,Alexandria University | ||||
| Abstract | ||||
| Introduction: Ceramic-reinforced resin materials are popular for dental restorations due to their aesthetic appeal and durability. However, they are subjected to various factors, such as staining agents and surface treatment techniques, affecting their color stability. Aim of the study: The objective of this study was to investigate how surface treatment protocols impact the color stability of ceramic-reinforced resin crowns. Materials and Methods: A total of fifty-four specimens (10 x 10 x 1.5 mm) were 3D printed using BEGO 3D printer (Bremen, Germany) then further divided into two groups based on material type: Flexcera (Desktop Health, Massachusetts, US) and Varseosmile Crown Plus (BEGO GmbH & Co. KG, Bremen, Germany) (both ceramic-reinforced resins manufactured through additive processes). Each group was further subdivided into three categories depending on the polishing method used: pumice (P), polishing discs (PD), and a control group (C). Color measurements were taken using a spectrophotometer, followed by immersion in coffee at 37°C for one, three, and seven days to assess color changes. The color difference (∆E) was calculated using the formula: ΔE= [(Δ L*) 2 + (Δ a*) 2 + (Δ b*) 2] ½. Results: Varseosmile exhibited the greatest color change (∆E00), especially in the control group. Flexcera showed discoloration when treated with pumice, while polishing discs produced the most consistent color stability across all time points. The immersion time influenced discoloration, with pronounced changes observed as the duration of immersion increased. Conclusion: The color stability of ceramic-reinforced resin materials was influenced by the surface treatment methods. | ||||
| Keywords | ||||
| Color; Ceramic reinfored resin; Additive manufacturing; Spectrophotometer; Color stability | ||||
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