Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images

Sakai, Takahiko; Li, Hefei; Abe, Tomohiro; Yamaguchi, Satoshi; Imazato, Satoshi

doi:https://doi.org/10.1016/j.dental.2020.10.030

Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images

Sakai, Takahiko; Li, Hefei; Abe, Tomohiro et al.

Dental Materials, 2021, 37(1), 168-174

Number of Access:667（2025-08-15 06:46 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/93086

Link to primary information

File	Format	Terms of use	Size	Views	Date.Available	Description	information
DentMater_37_1_168	pdf	None	312 KB	110	2023.11.09
Figures	pdf	None	2.50 MB	30	2023.11.20

Creative Commons : Attribution - NonCommercial - NoDerivatives

Item Information

Output File Export EndNote Basic Export Mendeley

Title	Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images
Creator	CreatorName Sakai, Takahiko
	CreatorName Li, Hefei
	CreatorName Abe, Tomohiro
	NRID 1000030397773 1000030397773 ORCID 0000-0002-4661-8821 0000-0002-4661-8821 researchmap permalink YamaguchiS_30397773 YamaguchiS_30397773 Scopus Author ID 7403873463 7403873463 CreatorName Yamaguchi, Satoshi
	NRID 1000080243244 1000080243244 ORCID 0000-0003-3655-4809 0000-0003-3655-4809 researchmap permalink read0014210 read0014210 Scopus Author ID 55994423600 55994423600 CreatorName Imazato, Satoshi
Subject	Filler shape
	Homogenization
	Localization
	Multi-scale analysis
	Nano-CT
	Resin composites
Description	Sakai T., Li H., Abe T., et al. Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images. Dental Materials 37, 168 (2021); https://doi.org/10.1016/j.dental.2020.10.030.
Abstract	Objective: The aim of this study was to investigate the criteria for predicting the fracture initiation of resin composites (RCs) at the micro-scale and assess the influence of filler shapes on the flexural properties of RCs by combining nano-CT imaging and in silico multi-scale analysis. Methods: Experimental RCs composed of irregular-shaped (IS) silica filler (31.2 vol%/50.0 wt%) and Bis-GMA/TEGDMA were prepared. The RC specimens were scanned by a nano-CT with 500-nm resolution, and 10 micro-scale models (100 × 100 × 100 μm) were randomly extracted from a scanned region. In silico micro-scale models containing sphere-shaped (SS) fillers with the same volume content as the experimental RC were designed. Each RC model's elastic modulus and Poisson's ratio at the macro-scale were calculated using homogenization analysis. The flexural strength of the RC models were predicted by finite element analysis using the elastic moduli and Poisson's ratio values. Results: Significantly greater elastic modulus values were obtained in the X, Y, and Z directions for RC models containing IS fillers than SS fillers. Similarly, smaller Poisson's ratio values were observed in the Y and Z directions for RC model containing IS fillers than SS fillers (p < 0.05). The flexural strength of RC model containing IS fillers was significantly greater than the RC model containing SS fillers (p < 0.05). Significance: The in silico multi-scale analysis established in this study demonstrated that RC model containing irregular-shaped fillers had greater flexural strength than RC model loaded with SS fillers, suggesting that the mechanical strength of the RC can be improved by optimizing the shape of the silica fillers.
Publisher	Elsevier Inc.
Source Title	Dental Materials
Volume (Issue)	37(1)
Page	168-174
Date of Issued	2021-01-01
Language	English
Handle URL	https://hdl.handle.net/11094/93086
PISSN	01095641
Relation.isVersionOf	DOI (Publisher Version) https://doi.org/10.1016/j.dental.2020.10.030
Access Rights	open access
CopyRight	©2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
oaire:version	Accepted Manuscript
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Dental Materials. 2021, 37(1), p. 168-174
DC.title	Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images
DC.creator	Sakai, Takahiko
	Li, Hefei
	Abe, Tomohiro
	Yamaguchi, Satoshi
	Imazato, Satoshi
DC.publisher	Elsevier Inc.
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2021-01-01
DC.identifier	https://doi.org/10.1016/j.dental.2020.10.030
DC.subject	Filler shape
	Homogenization
	Localization
	Multi-scale analysis
	Nano-CT
	Resin composites
DC.description	Sakai T., Li H., Abe T., et al. Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images. Dental Materials 37, 168 (2021); https://doi.org/10.1016/j.dental.2020.10.030.
DCTERMS.abstract	Objective: The aim of this study was to investigate the criteria for predicting the fracture initiation of resin composites (RCs) at the micro-scale and assess the influence of filler shapes on the flexural properties of RCs by combining nano-CT imaging and in silico multi-scale analysis. Methods: Experimental RCs composed of irregular-shaped (IS) silica filler (31.2 vol%/50.0 wt%) and Bis-GMA/TEGDMA were prepared. The RC specimens were scanned by a nano-CT with 500-nm resolution, and 10 micro-scale models (100 × 100 × 100 μm) were randomly extracted from a scanned region. In silico micro-scale models containing sphere-shaped (SS) fillers with the same volume content as the experimental RC were designed. Each RC model's elastic modulus and Poisson's ratio at the macro-scale were calculated using homogenization analysis. The flexural strength of the RC models were predicted by finite element analysis using the elastic moduli and Poisson's ratio values. Results: Significantly greater elastic modulus values were obtained in the X, Y, and Z directions for RC models containing IS fillers than SS fillers. Similarly, smaller Poisson's ratio values were observed in the Y and Z directions for RC model containing IS fillers than SS fillers (p < 0.05). The flexural strength of RC model containing IS fillers was significantly greater than the RC model containing SS fillers (p < 0.05). Significance: The in silico multi-scale analysis established in this study demonstrated that RC model containing irregular-shaped fillers had greater flexural strength than RC model loaded with SS fillers, suggesting that the mechanical strength of the RC can be improved by optimizing the shape of the silica fillers.
DC.rights	©2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
DC.format	93086
citation_title	Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images
citation_author	Sakai, Takahiko
	Li, Hefei
	Abe, Tomohiro
	Yamaguchi, Satoshi
	Imazato, Satoshi
citation_publisher	Elsevier Inc.
citation_language	English
citation_date	2021-01-01
citation_journal_title	Dental Materials
citation_volume	37
citation_issue	1
citation_firstpage	168
citation_lastpage	174
citation_doi	https://doi.org/10.1016/j.dental.2020.10.030
citation_public_url	https://hdl.handle.net/11094/93086

Multi-scale analysis of the influence of filler shapes on the mechanical performance of resin composites using high resolution nano-CT images

Link to primary information

Item Information

Show details