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Experimental and computational approach for evaluating the mechanical characteristics of dental composite resins with various filler sizes

Paper ID Volume ID Publish Year Pages File Format Full-Text
2629 119 2006 7 PDF Available
Title
Experimental and computational approach for evaluating the mechanical characteristics of dental composite resins with various filler sizes
Abstract

This study aimed to investigate the influence of particle size of fillers on flexural properties of dental composite resins by laboratory testing with computational analysis validation. Four kinds of silica fillers with mean particle sizes of 3.3, 4.3, 7.9, and 15.5 μm were used. Filler content was kept constant at 70 mass% (or 53.8 vol.%). The three-point bending test was performed with a constant loading speed of 1.0 mm/min, and a span length of 20 mm using an Instron machine, in order to measure flexural strength and modulus of composite resins with various particle sizes. Test specimens were 2-mm wide, 2-mm thick, and 25-mm long rectangular bars. Furthermore, a numerical simulation using three-dimensional finite element (FE) analysis was performed to investigate stress distribution in composite resins under loading. As a result, flexural strength decreased with increasing particle size of the filler of the composite resins (p < 0.05). On the other hand, there was no significant difference in Young’s modulus among composite resins with various filler sizes (p > 0.05). Moreover, FE analysis indicated that stress concentration increased with increasing particle size in agreement with experimental results of flexural strength. In conclusion, within the limitations of this investigation, we confirmed that flexural strength of composite resins decreased with increasing filler particle size. In addition, FE analysis was effective for evaluating stress distributions of dental composite resins with various filler sizes.

Keywords
Dental composite resins; Flexural properties; Particle size; Finite element analysis; Stress distribution
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Experimental and computational approach for evaluating the mechanical characteristics of dental composite resins with various filler sizes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 2, Issue 6, November 2006, Pages 633–639
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us