An In vitro Investigation on the Impact of Sodium Fluoride on the Color Stability of Ceramic Restorations
DOI:
https://doi.org/10.51626/ijoh.2024.04.00041Keywords:
Sodium Fluoride , Color Stability , Ceramic Restorations , In-Vitro Study , YemenAbstract
Background and Objectives: The demand for cosmetic composite materials has increased with the growing interest in cosmetic dentistry to achieve a bright white smile. The efficiency of esthetic restorative materials depends on their resistance to deterioration and longevity in the oral cavity. The purpose of this study is to evaluate the effect of sodium fluoride treatment on the color fastness of all ceramic restorations, IPS E-max Cad and IPS E-max press, knowing that both groups have low transparency. Materials and Methods: For this investigation, a total of 20 specimens (cylindrical disks) with A2 vita shade were made. Each cylindrical disk had dimensions of 10 mm in diameter and 2 mm in thickness. The specimens were split into two groups of ten each. To simulate a year of clinical exposure, all specimens were submerged in a sodium fluoride solution with a concentration of 1.0% for ten days. At baseline and ten days after immersion in the solution, the color difference of each specimen was measured using a spectrometer (Vita Easyshade). To ensure repeatable color measurement, each color measurement was made twice at random in the disk center, positioned perpendicular to the surface of the specimens and in direct contact. The values of CIE L*a*b* were noted. Results: The study found that sodium fluoride caused significant color change in E-max press discs, with a mean ΔE value of 5.11302, higher than E-max CAD grouped. The discs also showed slightly lower L* values (77.74) representing darkness compared to E-max CAD discs (79.305). The a* values indicated redness, while the b* values indicated yellowishness. Conclusions: The results of this study showed a statistically significant difference in color stability among the immersed IPS E-max press and IPS E-max CAD specimens. The IPS E-max CAD specimens showed a better color stability. On the other hand, the staining observed in the IPS E-max press was clinically noticeable. IPS E-max CAD could be a better material with less color change. Discoloration of specimens increased proportionally with sodium fluoride concentration. Keywords: Sodium Fluoride, Color Stability, Ceramic Restorations, In-Vitro Study, YemenReferences
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