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

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2004; 29(2): 191-199.

Published online: 31 March 2004

DOI: https://doi.org/10.5395/JKACD.2004.29.2.191

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

Soo-Il Shin, Dong-Hoon Shin

Department of Conservative Dentistry, College of Dentistry, Dankook University, Korea.

Corresponding author: Dong-Hoon Shin. Department of Conservative Dentistry, School of Dentistry, Dankook University, San 7-1, Shinbu-dong, CheanAn, ChungNam, Korea, 330-716. Tel: 82-41-550-1965, Fax: 82-41-550-1963, donyshin@dku.edu

Copyright © 2004 Korean Academy of Conservative Dentistry

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.

Keywords: Core build-up, Working time, Setting time, Depth of polymerization, Flexural strength, Bond strength, Microleakage

Figures and Tables

Figure 1

Ti-Core: Temperature changes during auto or chemically cure

jkacd-29-191-g001

Table 1

Materials used in the study

jkacd-29-191-i001

Table 1

Work Time of materials (seconds)

jkacd-29-191-i002

Table 2

Setting time when auto-cured (seconds)

jkacd-29-191-i003

Table 3

Maximum setting temperature when auto-cured (℃)

jkacd-29-191-i004

Mean values designated with the same superscript letter are not statistically different (p > 0.05)

Table 4

Setting time when light cured (seconds)

jkacd-29-191-i005

Mean values designated with the same superscript letter are not statistically different (p > 0.05)

Table 5

Maximum setting temperature when light cured (℃)

jkacd-29-191-i006

Mean values designated with the same superscript letter are not statistically different (p > 0.05)

Table 6

Flexural Strength of core materials (MPa)

jkacd-29-191-i007

Mean values designated with the same superscript letter are not statistically different (p > 0.05)

Table 7

Adhesive strength of core materials (Kgf)

jkacd-29-191-i008

Mean values designated with the same superscript letter are not statistically different (p > 0.05)

Table 8

Microleakage scores

jkacd-29-191-i009

Mean values designated with the same superscript letter are not statistically different (p > 0.05)

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