Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite

Wen Wen Liu1, Xiao Ping He1, An Chun Mo2, Qian Qian Yao1, Jun Ye1, Nie Jing2 1State Key Laboratory of Oral Diseases, 2Department of Oral Implant, West China College of Stomatology, Sichuan University, Chengdu, People&#39;s Republic of China Abstract: The objective of this study was to invest...

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Autores principales:	Ye J, Yao QQ, Mo AC, He XP, Liu WW, Jing N
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2011
Materias:	Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/724258b86b604e5e91187798a0f8ed22
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spelling	oai:doaj.org-article:724258b86b604e5e91187798a0f8ed222021-12-02T02:10:28ZInvestigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite1176-91141178-2013https://doaj.org/article/724258b86b604e5e91187798a0f8ed222011-08-01T00:00:00Zhttp://www.dovepress.com/investigation-of-the-mechanical-properties-of-a-low-shrinkage-liquid-c-a8151https://doaj.org/toc/1176-9114https://doaj.org/toc/1178-2013Wen Wen Liu1, Xiao Ping He1, An Chun Mo2, Qian Qian Yao1, Jun Ye1, Nie Jing2 1State Key Laboratory of Oral Diseases, 2Department of Oral Implant, West China College of Stomatology, Sichuan University, Chengdu, People&#39;s Republic of China Abstract: The objective of this study was to investigate the mechanical properties of a low-shrinkage acrylate liquid crystalline resin matrix (ALCRM), (4-3-(acryloyloxy)-2-hydroxypropoxy) phenyl 4-(3-(acryloyloxy)-2-hydroxypropoxy) benzoate, combined with nano-hydroxyapatite (na-HA). The ALCRM monomer and diluent monomer triethylene glycol dimethacrylate (TEGDMA) were mixed at a mass ratio of 7:3 to prepare the resin matrix. The volume shrinkage of the ALCRM/TEGDMA and the traditional resin matrix Bis-GMA (2, 2-bis [4-(3-methacryloxy-2-hydroxypropoxy) phenyl] propane)/TEGDMA were measured. Then 20%, 30%, and 40% na-HA were added to ALCRM/TEGDMA and Bis-GMA/TEGDMA, respectively. Compressive strength (CS) and Vickers hardness (VHN) were tested to identify mechanical properties of the composites. The volume shrinkage of the ALCRM/TEGDMA was 3.60% &plusmn; 0.36%, which was lower than that of the traditional resin matrix. Moreover, with the same amount of na-HA filler, the mechanical properties of the ALCRM-based composites were superior to those of Bis-GMA-based composites. ALCRM-based composites exhibited the highest CS and VHN values when the filler content was 30%. These results indicate that the low-shrinkage liquid crystalline resin matrix has strong mechanical properties after incorporating the na-HA. The experimental ALCRM-based composites have promising potential for the development of novel low-shrinkage dental resins with strong mechanical properties. Keywords: liquid crystalline matrix, nano-hydroxyapatite, compressive strength, Vickers hardnessYe JYao QQMo ACHe XPLiu WWJing NDove Medical PressarticleMedicine (General)R5-920ENInternational Journal of Nanomedicine, Vol 2011, Iss default, Pp 1787-1791 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine (General) R5-920
spellingShingle	Medicine (General) R5-920 Ye J Yao QQ Mo AC He XP Liu WW Jing N Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite
description	Wen Wen Liu1, Xiao Ping He1, An Chun Mo2, Qian Qian Yao1, Jun Ye1, Nie Jing2 1State Key Laboratory of Oral Diseases, 2Department of Oral Implant, West China College of Stomatology, Sichuan University, Chengdu, People&#39;s Republic of China Abstract: The objective of this study was to investigate the mechanical properties of a low-shrinkage acrylate liquid crystalline resin matrix (ALCRM), (4-3-(acryloyloxy)-2-hydroxypropoxy) phenyl 4-(3-(acryloyloxy)-2-hydroxypropoxy) benzoate, combined with nano-hydroxyapatite (na-HA). The ALCRM monomer and diluent monomer triethylene glycol dimethacrylate (TEGDMA) were mixed at a mass ratio of 7:3 to prepare the resin matrix. The volume shrinkage of the ALCRM/TEGDMA and the traditional resin matrix Bis-GMA (2, 2-bis [4-(3-methacryloxy-2-hydroxypropoxy) phenyl] propane)/TEGDMA were measured. Then 20%, 30%, and 40% na-HA were added to ALCRM/TEGDMA and Bis-GMA/TEGDMA, respectively. Compressive strength (CS) and Vickers hardness (VHN) were tested to identify mechanical properties of the composites. The volume shrinkage of the ALCRM/TEGDMA was 3.60% &plusmn; 0.36%, which was lower than that of the traditional resin matrix. Moreover, with the same amount of na-HA filler, the mechanical properties of the ALCRM-based composites were superior to those of Bis-GMA-based composites. ALCRM-based composites exhibited the highest CS and VHN values when the filler content was 30%. These results indicate that the low-shrinkage liquid crystalline resin matrix has strong mechanical properties after incorporating the na-HA. The experimental ALCRM-based composites have promising potential for the development of novel low-shrinkage dental resins with strong mechanical properties. Keywords: liquid crystalline matrix, nano-hydroxyapatite, compressive strength, Vickers hardness
format	article
author	Ye J Yao QQ Mo AC He XP Liu WW Jing N
author_facet	Ye J Yao QQ Mo AC He XP Liu WW Jing N
author_sort	Ye J
title	Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite
title_short	Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite
title_full	Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite
title_fullStr	Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite
title_full_unstemmed	Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite
title_sort	investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite
publisher	Dove Medical Press
publishDate	2011
url	https://doaj.org/article/724258b86b604e5e91187798a0f8ed22
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Investigation of the mechanical properties of a low-shrinkage liquid crystalline matrix combined with nano-hydroxyapatite

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