Effect of photo-polymerization mode on the degree of conversion of resin cement under different ceramic materials.

Autor:	Ebeid K; Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt - kamal_ebeid@dent.asu.edu.eg., Sabet A; Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt.; Department of Fixed Prosthodontics, British University, Cairo, Egypt., Rafla N; Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt., Al-Haj Husain N; School of Dental Medicine, Department of Reconstructive Dentistry and Gerodontology, University of Bern, Bern, Switzerland., Özcan M; Division of Dental Biomaterials, Center for Dental and Oral Medicine, Clinic for Reconstructive Dentistry, University of Zurich, Zurich, Switzerland.
Jazyk:	angličtina
Zdroj:	Minerva dental and oral science [Minerva Dent Oral Sci] 2021 Aug; Vol. 70 (4), pp. 147-154. Date of Electronic Publication: 2020 Jul 21.
DOI:	10.23736/S2724-6329.20.04354-X
Abstrakt:	Background: This study evaluated the effect of different polymerization modes and duration on the degree of conversion (DC) of resin cement under different types of ceramics. Methods: Ceramic materials were divided into 3 groups (N.=60): group 1, Cerasmart; group 2, Vita Enamic; and group 3, Vita Mark II. Each group was then divided into three subgroups (N.=20) according to the polymerization mode (A: low-intensity; B: high-intensity; and C: soft-start). Subgroups were then divided into two further groups according to the polymerization time (I: 10 s; and II: 20 s). DC of light-cured resin cement beneath different kinds of ceramics was tested using FTIR spectroscopy. Results were compared to a control group cured without overlying ceramic. Results: While the type of ceramic and mode of polymerization showed a significant effect on the DC of resin cement, polymerization duration did not. Vita Mark II group showed the highest DC of resin cement followed by Vita Enamic and Cerasmart. High- and low-intensity polymerization modes did not show significant difference, but both showed significantly lower DC when compared to soft start mode. Conclusions: Type of ceramic and polymerization mode showed a direct effect on the DC of resin cement.
Databáze:	MEDLINE
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