Effect of Different Drinks Immersion on Color Stability And Degree of Cure of Two Types of Dental Resin Composite Material ( An In Vitro Study)
Mustafa Rashad*, Amel Muhson Naji, Sahira Hassan Kareem and Hussain Al-Huwaizi
ABSTRACT
Among the wide range of polymer matrices, polymethyl methacrylate (PMMA)-based matrices can be considered the most common polymer used in dental applications. Important parameters, such as conversion degree and change of color of two commercial brands; nano- filled composite resin, NovaPro (N), and micro-hybrid composite resin, VLADMIVA (V) were investigated after curing and immersing the dental specimens in different drinks for one and seven days at 37 0C. Raman spectroscopy was used to evaluate the degree of conversion (DC) by measuring the ratio of the absorption bands related to aromatic and methacrylate C = C stretching modes. These ratios were of the same value. CIE (Color Imaging Experiment) was used to investigate the color change of the filling resins. (N) composite has a noticeable color change in coffee after 24 hours and almost the same change after one week. Yogurt also has a great effect on the color stability for the same composite just after one-week immersion. Cola has a large effect on the color for the same composite after one-week immersion. For (D) composite, the effect of the drinks after immersion for 24 hours and after one week was within the acceptable limit and non-noticeable by the naked human eye, which means it has better color stability than the (N).
