Shaimaa Sayed Ahmed, Enas Fathelbab Abdelhalim And Shams Waaz Amgad,
ABSTRACT
Objectives: The Study Evaluated Color Stability Of Two Machinable Restorative Materials, Resin Nano Ceramics (Lava Ultimate, 3M ESPE) And Poly Ether Ether Ketone Ceramics (Bio HPP, Bredent GmbH) After Immersion In Different Staining Solutions (coffee, Tea, Pepsi And Distilled Water As Control Group).
Materials and Methods: Forty Upper Central Teeth Were Prepared For Crowns And Divided Into Two Main Groups According To The Type Of Material Used; Twenty For Lava Ultimate And Twenty For Bio HPP. Each Group Was Subdivided Into Four Subgroups Five Specimens Each To Be Immersed In Three Different Staining Solutions; (coffee, Tea And Pepsi( And Distilled Water As Control Group, For Color Stability Test After A Month Using Spectrophotometer.
Results: A Statistical Insignificant Difference In Color Change Mean Values Was Found Between Lava Ultimate Group And Bio Hpp Group, Coffee Showed The Highest Mean Value Of Color Change Followed By Tea Then Pepsi.
Conclusion: Resin Nano Ceramic Materials Are More Susceptible To Discoloration Than PEEK Ceramics. Coffee Has The Highest Ability To Stain Restorative Materials.
