Spectrophotometrical CIELab color space analysis of CAD-CAM dental ceramics optical properties changes before and after thermocycling
Background: CAD-CAM dental ceramic materials have highly advanced in the field of colors. One of the most effective methods to evaluate the optical changes, that ceramics might undergo, is by using a spectrophotometer before and after the ceramic thermocycling in different solutions. Aim: To analyse the most recent literature work in order to compare, evaluate and assess the changes in CAD/CAM dental ceramics optical properties before and after thermocycling with different compounds and solutions. Methods and materials: Analysis of literature was performed by using the PRISMA protocol. The search was done electronically in ScienceDirect, MEDLINE, Cochrane Library and Wiley Online Library databases. The focus question was developed by the PICO (population (P), intervention (I), control (C), and outcome (O)) study design protocol. Results: Out of 212 articles that were found, and 103 records that were screened, 5 articles were included into the qualitative analysis. Four of the studies reported only slight color changes in CAD/CAM dental ceramic materials before and after thermocycling. One of the studies reported the changes to be more significant, and the variation depended on the type of the CAD/CAM material that was used. Conclusions: CAD/CAM dental ceramic materials are highly resistant to color changes when exposed to thermocycling procedures.