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KMID : 1023420150150040407
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Journal of Dental Hygiene Science
2015 Volume.15 No. 4 p.407 ~ p.412
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Evaluation of Flexural Properties of Indirect Gum-Shade Composite Resin for Esthetic Improvement
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Im Youn-Woon
Hwang Seong-Sig
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Abstract
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This study investigated flexural properties of indirect Gum-shade composite resins for esthetic improvement. The material utilized in this study was Crea.lign, Twiny flow and Twiny paste (TP). Ten specimens were fabricated with a dimension of 25×2×2 mm according to the ISO 4049. After fabrications, specimens were stored in the distilled water for 24 hours at the temperature of 37℃. Three-point bending test was performed in universal testing machine (Instron 3344; Instron, USA) at a crosshead speed of 1 mm/min until the failure occurred. TP exhibited a higher flexural strength (FS) and flexural modulus (FM) compared to the flowable materials. There were significant differences among the three materials in FS and FM. However, there was no significant difference in work of fracture (WOF) in all tested materials (p＞0.05). In Weibull analysis, TP showed the greatest Weibull modulus which means a higher reliability of the materials. Also, Gum-shade composite resins revealed a strong correlation in all flexural properties. There was a positive correlation in FS-FM (r²=0.99) and a negative correlation between FS-WOF and FM-WOF (r²＞0.97). Therefore, this confirmed that flexural property was important for mechanical behavior evaluation and useful information. To addition, this improved among mechanical properties correlation of materials as important factor.
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KEYWORD
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Flexural properties, Flexural strength, Gum-shade composite resin, Weibull analysis
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