Clinical assessment of color stability and patient satisfaction for polished versus glazed lithium disilicate glass ceramic restorations

Abstract

Aim: To evaluate clinically the color stability and patient satisfaction of polished versus glazed lithium disilicate glass ceramic restorations. Methodology: Twenty full coverage crowns were fabricated from IPS e. max press in the posterior area. The patients were randomly divided into two equal groups according to the applied crown surface treatment. Group 1 (control group) 10 glazed crowns and Group 2 (intervention group) 10 polished crowns. ΔE was measured using Vita easyshade and patient satisfaction was evaluated through Visual Analogue Scale (VAS), immediately after cementation and every two months for one year. Data were analyzed using two-way ANOVA and t-test. P ≤ 0.05 was considered statistically significant. Results: The results showed that the polishing technique had a statistically significant mean ΔE than glazing but both were clinically acceptable. Regarding the follow up period results showed that time had no statistically significant effect on mean ΔE values. There was also no statistically significant difference in patient satisfaction within each technique and at the different follow up times. Conclusion: Although polishing showed higher color change than glazing, it was clinically acceptable. Therefor polishing can be recommended as an alternative to glazing for IPS e.max crowns.