Color stability and surface roughness of different recent provisional restorative materials” An In vitro study

Abstract

Objectives: To evaluate the effects of staining solutions on the color stability and roughness of different provisional resin materials. Materials and methods: The 105 specimens were divided into5 groups according to type of provisional restorations twenty one test specimens for each group (N=21).Each material group specimens subdivided into 3 subgroups according to coloring solutions (n=7) one group immersed in artificial saliva, the second in coffee solution and the third in mouth wash. Baseline color measurements, using spectrophotometer then after 2 and 4 weeks to measure color change (ΔE) by means of the CIE L*a*b* system. Surface roughness also were measured using profilometer for all specimens before and after immersion in staining solutions. Results: In Color change (ΔE) the results showed that provisional material, Immersion media, and Time had a statistically significant effect on mean ΔE. The interaction between the three variables had a statistically significant effect on mean ΔE indicating that the variables are dependent upon each other. Change in surface roughness (ΔRa), in Comparison between provisional materials: After immersion in the three solutions, there was a statistically significant difference between mean ΔRa of provisional materials. In Comparison between immersion media With Protemp4, Tempron, Vita CAD temp as well as breCAM.multiCOM; there was no statistically significant difference between mean ΔRa of immersion media, but with Tuff temp; there was a statistically significant difference between mean ΔRa of immersion media. Conclusions: Type of provisional restorative materials, staining solutions and immersion times are significant factors that can affect color stability of the five provisional restorative materials tested, type of provisional restorative materials was the only significant factor for surface roughness, so choosing type of material must be the interest regarding to smoothness.