J Korean Acad Conserv Dent.  2004 Mar;29(2):191-199. 10.5395/JKACD.2004.29.2.191.

A study on the material properties of various composite resins for core build-up

• Shin SI
• Shin DH

• KMID: 1987094
• DOI: http://doi.org/10.5395/JKACD.2004.29.2.191

Abstract

The purposes of this study were to estimate the material properties of the recently developed domestic composite resins for core filling material (Chemical, Dual A, Dual B; Vericom, Korea) and to compare them with other marketed foreign products (CorePaste, Den-Mat, USA; Ti-Core, Essential Dental Systems, USA; Support, SCI-Pharm, USA). Six assessments were made; working time, setting time, depth of polymerization, flexural strength, bonding strength, and marginal leakage. All items were compared to ISO standards. All domestic products satisfied the minimum requirements from ISO standards (working time: above 90 seconds, setting time: within 5 minutes), and showed significantly higher flexural strength than Core Paste. Dual A and B could, especially, reduce the setting time to 60 seconds when cured with 600 mW/cm2 light intensity. All experimental materials showed 6 mm depth of polymerization. Bond strengths of Ti-Core and Dual B materials were significantly higher than the other materials. Furthermore, three domestic products and Ti-Core could reduce the microleakage effectively.

Keyword

Core build-up; Working time; Setting time; Depth of polymerization; Flexural strength; Bond strength; Microleakage

MeSH Terms

Composite Resins*
Polymerization
Polymers
Composite Resins
Polymers

Figure

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  Figure 1 Ti-Core: Temperature changes during auto or chemically cure

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