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Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials

The objective of this study was to investigate the effects of oral environmental pH on the viscoelastic properties of bioactive restorative materials (BRMs) by using dynamic mechanical analysis. Stainless steel molds were used to fabricate 40 beam-shaped specimens (12 x 2 x 2 mm) for each material....

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Main Authors: Xin, Joshua Ong Ee, U-Jin, Adrian Yap, Aziz, Azwatee Abdul, Yahya, Noor Azlin
Format: Article
Published: Penerbit Universiti Kebangsaan Malaysia 2022
Subjects:
RK Dentistry
Online Access:http://eprints.um.edu.my/40429/
https://doi.org/10.17576/jsm-2022-5109-20
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spelling my.um.eprints.404292024-07-15T07:58:03Z http://eprints.um.edu.my/40429/ Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials Xin, Joshua Ong Ee U-Jin, Adrian Yap Aziz, Azwatee Abdul Yahya, Noor Azlin RK Dentistry The objective of this study was to investigate the effects of oral environmental pH on the viscoelastic properties of bioactive restorative materials (BRMs) by using dynamic mechanical analysis. Stainless steel molds were used to fabricate 40 beam-shaped specimens (12 x 2 x 2 mm) for each material. The specimens were finished, measured, randomly divided into four groups (n = 10), and immersed in aqueous solutions of pH 3.0, 5.0, 6.8 and 10.0 at 37 degrees C for seven days. The specimens were then subjected to dynamic mechanical analysis with a 5 N load and frequency range of 0.1-10.0 Hz. Data were analyzed using one-way ANOVA/Dunnet T3's test (alpha = 0.05). Mean elastic modulus spanned from 2.68 +/- 0.17 to 6.49 +/- 0.71 GPa, while viscous modulus ranged from 0.43 +/- 0.03 to 0.62 +/- 0.12 GPa. Loss tangent differed from 77.30 +/- 4.90 to 164.50 +/- 9.12. Significant differences among pH were discerned for (i) Elastic modulus: Cention N - pH 3.0, 5.0, 10.0 > 6.8; Activa Bioactive - pH 3.0, 6.8, 10.0 > 5.0, (ii) Viscous modulus: Cention N - pH 3.0, 5.0, 10.0 > 6.8, and (iii) Loss tangent: Activa Bioactive - pH 5.0 > 3.0, 6.8, 10.0. Significant differences in viscoelastic properties were noted among the BRMs with Activa Bioactive presenting the lowest elastic modulus for all pH. Immersion of all materials in pH 6.8 yielded the highest elastic modulus, except for Activa Bioactive. The effects of environmental pH on viscoelastic properties of BRMs are material-dependent. Penerbit Universiti Kebangsaan Malaysia 2022-09 Article PeerReviewed Xin, Joshua Ong Ee and U-Jin, Adrian Yap and Aziz, Azwatee Abdul and Yahya, Noor Azlin (2022) Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials. Sains Malaysiana, 51 (9). pp. 2999-3008. ISSN 0126-6039, DOI https://doi.org/10.17576/jsm-2022-5109-20 <https://doi.org/10.17576/jsm-2022-5109-20>. https://doi.org/10.17576/jsm-2022-5109-20 10.17576/jsm-2022-5109-20
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic RK Dentistry
spellingShingle RK Dentistry
Xin, Joshua Ong Ee
U-Jin, Adrian Yap
Aziz, Azwatee Abdul
Yahya, Noor Azlin
Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials
description The objective of this study was to investigate the effects of oral environmental pH on the viscoelastic properties of bioactive restorative materials (BRMs) by using dynamic mechanical analysis. Stainless steel molds were used to fabricate 40 beam-shaped specimens (12 x 2 x 2 mm) for each material. The specimens were finished, measured, randomly divided into four groups (n = 10), and immersed in aqueous solutions of pH 3.0, 5.0, 6.8 and 10.0 at 37 degrees C for seven days. The specimens were then subjected to dynamic mechanical analysis with a 5 N load and frequency range of 0.1-10.0 Hz. Data were analyzed using one-way ANOVA/Dunnet T3's test (alpha = 0.05). Mean elastic modulus spanned from 2.68 +/- 0.17 to 6.49 +/- 0.71 GPa, while viscous modulus ranged from 0.43 +/- 0.03 to 0.62 +/- 0.12 GPa. Loss tangent differed from 77.30 +/- 4.90 to 164.50 +/- 9.12. Significant differences among pH were discerned for (i) Elastic modulus: Cention N - pH 3.0, 5.0, 10.0 > 6.8; Activa Bioactive - pH 3.0, 6.8, 10.0 > 5.0, (ii) Viscous modulus: Cention N - pH 3.0, 5.0, 10.0 > 6.8, and (iii) Loss tangent: Activa Bioactive - pH 5.0 > 3.0, 6.8, 10.0. Significant differences in viscoelastic properties were noted among the BRMs with Activa Bioactive presenting the lowest elastic modulus for all pH. Immersion of all materials in pH 6.8 yielded the highest elastic modulus, except for Activa Bioactive. The effects of environmental pH on viscoelastic properties of BRMs are material-dependent.
format Article
author Xin, Joshua Ong Ee
U-Jin, Adrian Yap
Aziz, Azwatee Abdul
Yahya, Noor Azlin
author_facet Xin, Joshua Ong Ee
U-Jin, Adrian Yap
Aziz, Azwatee Abdul
Yahya, Noor Azlin
author_sort Xin, Joshua Ong Ee
title Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials
title_short Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials
title_full Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials
title_fullStr Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials
title_full_unstemmed Effect of oral environmental pH on the dynamic characterization of bioactive restorative materials
title_sort effect of oral environmental ph on the dynamic characterization of bioactive restorative materials
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2022
url http://eprints.um.edu.my/40429/
https://doi.org/10.17576/jsm-2022-5109-20
_version_ 1805881119526092800
score 13.211869

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