Mechanical properties of hydroxyapatite whisker-reinforced bis-GMA-based resin composites

Dental Materials : Official Publication of the Academy of Dental Materials
Hongquan Zhang, Brian W Darvell

Abstract

To evaluate the reinforcement efficacy of hydroxyapatite (HA) whiskers in bis-GMA-based dental restorative composites and determine the effect of volume fraction on the mechanical properties. Silanized HA whiskers and nano-scale powder were mixed in various proportions with bis-phenol A-glycidyl methacrylate (bis-GMA)-based polymer pastes. Equal parts of initiator and accelerator pastes were then mixed by hand. After curing at 25 ± 2 °C and storage in distilled water at 37 °C for 24h, elastic modulus, fracture strength and work-to-failure in three-point bending, fracture toughness using a notchless triangular prism fracture method, and Vickers hardness were determined. Data were examined by means of one-way analysis of variance and linear regression. Reinforcing efficacy was significantly dependent on filler morphology. Whiskers had good dispersibility and wettability with bis-GMA-based polymer, conferring good reinforcement and toughening, significantly better than did the HA nano-scale powder. HA whiskers provided better mechanical properties in bis-GMA-based composites compared with the nano-scale powder. Such whisker-reinforced materials may be beneficial compared with currently used dental restorative materials.

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Citations

Oct 8, 2013·Materials Science & Engineering. C, Materials for Biological Applications·Fengwei LiuMeifang Zhu
Dec 3, 2014·Dental Materials : Official Publication of the Academy of Dental Materials·Fengwei LiuMeifang Zhu
Sep 1, 2015·Journal of the Mechanical Behavior of Biomedical Materials·Ting WangJukka Pekka Matinlinna
Jan 9, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Junling WuHockin H K Xu
Dec 15, 2015·Materials Science & Engineering. C, Materials for Biological Applications·Xiaoyan WangXuliang Deng
Jun 8, 2013·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Maja LezajaVesna Miletic
Jul 3, 2013·Trends in Biotechnology·Mary A S MeloLidiany K A Rodrigues
Jul 2, 2014·BioMed Research International·Xiaoming LiFumio Watari
May 15, 2016·Journal of the Mechanical Behavior of Biomedical Materials·Zahra MohammadiFariba Rasouli-Disfani
Oct 18, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Miao AiXiaoping Yang
Feb 26, 2016·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Mohammad Sayem MozumderAbdel-Hamid I Mourad
Nov 2, 2018·Dental Materials Journal·Abdul Samad Khan, Mariam Raza Syed
Feb 9, 2020·Polymers·Loredana TammaroAndrea Sorrentino
Aug 28, 2018·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Wei XuHonglian Dai
Dec 9, 2020·Acta Biomaterialia·Yazi WangX X Zhu
Jan 11, 2016·ACS Biomaterials Science & Engineering·Eric HabibX X Zhu

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