POST-CURE’S EFFECT ON THE DEPTH OF CURE OF A SHORT FIBER-REINFORCED RESIN COMPOSITE

Ellyza Herda,Mia Damiyanti,Nadia Safira Ninda

doi:10.22159/ijap.2017.v9s2.43

Ellyza Herda, Mia Damiyanti + Show 1 more

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https://doi.org/10.22159/ijap.2017.v9s2.43

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Abstract

Objective: This study aimed to identify post-cure’s effect on the depth of cure (DOC) of a short fiber-reinforced resin composite (SFRC).Methods: Six EverX PosteriorTM shade A3 specimens were cured with a light-emitting diode light curing unit with 800 mW/cm2 of light irradiation for 20 s. The specimens were divided into two groups. The first was measured immediately post-cure and the second was measured 24-h post-cure. They were measured with a Vickers microhardness profile test. An independent t-test was used to analyze the significance of the differences between the DOC value and different variables.Results: The DOC of the specimens measured immediately post-cure was 3.02±0.02 mm. The DOC of the specimens measured 24-h post-cure was 3.93±0.03 mm.Conclusion: The DOC of the specimens measured 24-h post-cure was significantly higher than the DOC of the specimens measured immediately post-cure. Post-cure polymerization (24-h post-cure) can increase the DOC values of an SFRC.

Highlights

Fiber-reinforced resin composites have been used for post crowns, periodontal splints, and reparative materials in removable dentures [1]
It was shade A3 cured with a light-emitting diode (LED) light curing unit (LCU) (Litex 695, USA) with light irradiation of 800 mW/cm2 for 20 s
The results of Group 1 were compared to the results of Group 2 to determine differences in the depth of cure (DOC) values for the short fiber-reinforced resin composite (SFRC), depending on the curing method used

Summary

Introduction

Fiber-reinforced resin composites have been used for post crowns, periodontal splints, and reparative materials in removable dentures [1]. Short fiber-reinforced resin composites (SFRCs) have been developed as substructures in posterior restorations. Light-polymerized resin composites must undergo polymerization to solidify. Polymerization occurs in light-polymerized resin composites when curing continues after the curing process has begun (post-cure). Post-cure polymerization can increase the hardness and depth of cure (DOC) values of a resin composite, thereby affecting the success of the restoration. Inadequate polymerization will reduce the physical properties of a resin composite restoration because there are many non-reactive monomers [6,8]. DOC is influenced by the post-cure period; the irradiation distance; the size and distribution of the filler; and the type, color, and thickness of the resin composite [9,10]

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Conclusion