期刊名称：International Journal of Early Childhood Special Education
电子版ISSN：1308-5581
出版年度：2022
卷号：14
期号：4
页码：526-533
DOI：10.9756/INT-JECSE/V14I4.67
语种：English
出版社：International Journal of Early Childhood Special Education
摘要：The purpose of this research is to examine the polymerization of a dual-cure resin cement utilizing three distinct all-ceramic systems, each with a unique composition, cured using a different cycle, and assessed both immediately (15 minutes) and 24 hours later. Materials and Methods: Group B consisted of lithium disilicate plates (IPS e.max); Group C consisted of leucite reinforced plates (IPS Empress); Group D consisted of zirconia plates (Cercon); and Group E was the control, consisting of no fired plate at all during the polymerization of gum concrete (Group A). In all, 80 tests were performed on gum concrete plates by 20 analyst meetings. In order to better reflect the two openness periods, t10 and t20, two additional subgroups (n = 10) are created for each event (10 and 20 s). Every one of the 80 sap plate tests was measured for microhardness (Vickers hardness number) once after 15 minutes and once after 24 hours to determine the degree of polymerization. For numerous group comparisons, we employed one-way ANOVA, t-tests, and paired t-tests, with Tukey's post hoc for pairwise comparisons within groups. Results: Group A (directly activated) samples of resin cement exhibited significantly greater mean microhardness values than Groups C, B, and D, both immediately and after 24 hours. Microhardness measurements conducted immediately after activation consistently lagged behind those done 24 hours later. There was no significant difference in microhardness between the 10- and 20-second cured resin cement discs, however the 20-second cured discs demonstrated the biggest rise in microhardness among all ceramics examined. Conclusion: Dual cured resin cement's polymerization was influenced by ceramic composition. When the length of time under the light source was doubled, the average microhardness value also rose dramatically. Resin cement discs examined after 24 hours showed a higher degree of conversion, resulting in a greater increase in hardness.
