The effect of light sources and CAD/CAM monolithic blocks on degree of conversion of cement
10.4047/jap.2018.10.4.291
- Author:
Aydan Boztuna ÇETINDEMIR
1
;
Bülent ŞERMET
;
Değer ÖNGÜL
Author Information
1. Bağcılar Educational and Research Hospital, Istanbul, Turkey.
- Publication Type:Original Article
- Keywords:
Computer-aided design and computer-aided manufacturing (CAD/CAM);
Monolithic ceramic;
Nanoceramic;
Hybrid ceramic;
Fourier transform infrared spectroscopy (FTIR)
- MeSH:
Ceramics;
Computer-Aided Design;
Crystallins;
Polymers;
Resin Cements;
Spectroscopy, Fourier Transform Infrared
- From:The Journal of Advanced Prosthodontics
2018;10(4):291-299
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: To assess the degree of conversion (DC) and light irradiance delivered to light-cured and dual-cured cements by application of different light sources through various types of monolithic computer-aided design and computer-aided manufacturing (CAD/CAM) materials. MATERIALS AND METHODS: RelyX Ultimate Clicker light-cured and dual-cured resin cement specimens with 1.5-mm thicknesses (n=300, 10/group), were placed under four types of crystalline core structure (Vita Enamic, Vita Suprinity, GC Ceresmart, Degudent Prettau Anterior). The specimens were irradiated for 40 seconds with an LED Soft-Start or pulse-delay unit or 20 seconds with a QTH unit. DC ratios were determined by using Fourier transform infrared spectroscopy (FTIR) after curing the specimen at 1 day and 1 month. The data were analyzed using the Mann-Whitney U test (for paired comparison) and the Kruskal-Wallis H test (for multiple comparison), with a significance level of P < .05. RESULTS: DC values were the highest for RelyX Ultimate Clicker light-cure specimens polymerized with the LED Soft-Start unit. The combination of the Vita Suprinity disc and RelyX Ultimate Clicker dual-cure resin cement yielded significantly higher values at both timepoints with all light units (all, P < .05). CONCLUSION: Within the limitations of this study, we conclude that the DC of RelyX Ultimate Clicker dual-cure resin cement was improved significantly by the use of Vita Suprinity and the LED Soft-Start light unit. We strongly recommend the combined use of an LED light unit and dual-cure luting cement for monolithic ceramic restorations.
