Research Article
Volume 20 Issue 3 - 2021
Surface Color Stability of Porcelain and Porcelain Repair Material after Storage in Khat Extract Solution and Other Staining Solutions
Mohammed A Dubais* and Raja Al-azani
Department of Restorative and Prosthodontics, College of Dentistry, University of Science and Technology, Sana’a, Yemen
*Corresponding Author: Mohammed A Dubais, Department of Restorative and Prosthodontics, College of Dentistry, University of Science and Technology, Sana’a, Yemen.
Received: December 31, 2020; Published: February 26, 2021


Background: Repair of porcelain restorations is often considered as an emergency treatment and represents a challenge for dentists, which usually requires management as a result of poor esthetics and reduced function of the fractured restoration. Repair porcelain system has been developed to solve this problem. Discoloration of the restoration may lead to patient dissatisfaction and additional expenses for replacement. This is a problem particularly when restoration is subjected to prolonged exposure to colorant medias. Therefore, this an invitro study was conducted to investigate and compare the surface color stability between porcelain and porcelain repair material after storage in aqueous khat extract mixed with mineral water, aqueous khat extract mixed with Miranda soft drink and aqueous khat mixed with PBS (phosphate buffering solution) as a control.

Materials and Methods: Eighty metal discs were prepared and randomly divided into two equal groups (A and B). Group A (40 specimen) metal discs were covered with porcelain (VMK95 vita) according to manufacturer’s specification and group B (40 specimen) metal discs were covered with repair porcelain material (Cemara Voco). Each of the main groups A and B were subdivided into four subgroups (10 specimens for each subgroup):

  1. Subgroup I specimens were immersed into khat with mineral water.
  2. Subgroup II specimens were immersed into khat with Miranda soft drink.
  3. Subgroup III specimens were immersed into Miranda soft drink.
  4. Subgroup IV specimens were immersed into PBS as a control group.

Each sample was immersed into the corresponding staining media and kept in an incubator (37ºC) for 2 weeks. The solution medias were changed every 24 hours. The color variation (ΔE*) between two color positions from values obtained before and after immersing in (3-D) L* a* b* color space was calculated and data were analyzed using One-Way ANOVA test followed by the post hoc test (p < 0.05) to evaluate the solution media effect on color change of the tested materials.

Results: Both tested materials showed color change, but repair porcelain *Cemara was more affected than porcelain material (VMK 95 VITA). The difference in discoloration was significant (p < 0.05). Khat with mineral water was found to cause the most discoloration followed by khat with Miranda, Miranda alone and PBS.

Keywords: Ceramic; Ceramic Repair Resin; Color Stability; Khat Extract Solution and Beverages


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Citation: Mohammed A Dubais and Raja Al-azani. “Surface Color Stability of Porcelain and Porcelain Repair Material after Storage in Khat Extract Solution and Other Staining Solutions”. EC Dental Science 20.3 (2021): 61-75.

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