EFFECT OF COMMONLY CONSUMED BEVERAGES ON COLOR STABILITY OF HYBRID CERAMICS: AN IN VITRO STUDY

Document Type : Original Article

Authors

1 Doctoral student, Fixed Prosthodontics Department, Faculty of Dentistry, Minia University, Minia, Egypt.

2 Associate Professor of Fixed Prosthodontics, Faculty of Dentistry, Minya University, Minia, Egypt.

Abstract

Background: different beverages and meals are ingested in varied amounts, acidity and colors. Each beverage has distinct influence on the oral cavity structures including the color stability of esthetic dental restorations.
Objective: The study aims to assess the color change of polymer infiltrated ceramic (Vita Enamic) after being immersed in different types of beverages: coffee, tea and cola in comparison to distilled water as control over a 28-day test period which equals to 28 months of beverages’ consumption.
Materials and methods: A total of 40 specimens were sliced from Vita Enamic blocks as each slice measures about 0.5 mm thick. Four groups were tested based on the immersion solutions. All samples were thermocycled at 15000 cycles between 5 and 55 degrees then samples were kept in 20 ml of each solution (Water, coffee, tea and cola) for at 37 ℃ for 28 days for each group. The color parameters (L-a-b) of the specimens were recorded before immersion and at the end of the 7th (D1), 14th (D2), 21st (D3) and 28th (D4) days after immersion. Color measurements were statistically analyzed with a significance threshold of P<0.05. Results: There was significant difference between four groups where (p<0.001). The color change differences (∆E) after staining from the highest to the lowest through all storage periods were as follows: tea > coffee > cola > water.
Conclusion: commonly consumed staining beverages influenced color stability of the polymer infiltrated ceramics. Tea and coffee beverages produced the greatest color change beyond the acceptance range.

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Egyptian Dental Journal
Volume 70, Issue 3 - Serial Number 4
Fixed Prosthodontics, Removable Prosthodontics and Dental Materials
July 2024
Pages 2451-2459

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