KMID : 1023820180100040291
|
|
The Journal of Advanced Prosthodontics 2018 Volume.10 No. 4 p.291 ~ p.299
|
|
The effect of light sources and CAD/CAM monolithic blocks on degree of conversion of cement
|
|
Cetindemir Aydan Boztuna
Sermet Bulent Ongul Deger
|
|
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.
|
|
KEYWORD
|
|
Computer-aided design and computer-aided manufacturing (CAD/CAM), Monolithic ceramic, Nanoceramic, Hybrid ceramic, Fourier transform infrared spectroscopy (FTIR)
|
|
FullTexts / Linksout information
|
|
|
|
Listed journal information
|
|
|