Effect of resin hydrophilicity and water storage on resin strength

C. K.Y. Yiu; N. M. King; D. H. Pashley; B. I. Suh; R. M. Carvalho; M. R.O. Carrilho; F. R. Tay

doi:10.1016/j.biomaterials.2004.01.026

Effect of resin hydrophilicity and water storage on resin strength

C. K.Y. Yiu, N. M. King, D. H. Pashley, B. I. Suh, R. M. Carvalho, M. R.O. Carrilho, F. R. Tay

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Abstract

This study evaluated the change in the ultimate tensile strength (UTS) of five polymerised resin blends of increasing hydrophilicity, after ageing in distilled water or silicon oil. Resin blocks were prepared from each resin blend by dispensing the uncured resin into a flexible, embedding mould, containing multiple cavities. The resins were polymerised in the moulds under nitrogen at 551.6kPa and light-activated at 125°C for 10min. After dry ageing for 24h at 37°C, the middle third of each resin specimen was trimmed into an 'I' shape. Fifteen control specimens were randomly selected from each resin blend for baseline UTS evaluation. The UTS of the experimental specimens were determined after 1, 3, 6 and 12 months of ageing in water or oil. The UTS of each group of resins at different storage periods in water or oil were analysed using the Friedman multiple ANOVA on ranks and Dunn's multiple comparison tests at 95% confidence level. Significant reduction (p<0.01) in UTS was observed in Groups II-V resins after 12-month storage in water, while the most hydrophobic Group I resin showed no significant change (p>0.05) in the same period. The percentage reduction in UTS increased with the hydrophilicity of the resin blends. Long-term water storage of hydrophilic resin blends such as those employed in dentine adhesives, resulted in a marked reduction in their mechanical strength that may compromise the durability of resin-dentine bonds.

Original language	English (US)
Pages (from-to)	5789-5796
Number of pages	8
Journal	Biomaterials
Volume	25
Issue number	26
DOIs	https://doi.org/10.1016/j.biomaterials.2004.01.026
State	Published - Nov 2004

Keywords

Hydrophilicity
Resin
Solubility parameter
Ultimate tensile strength

ASJC Scopus subject areas

Bioengineering
Ceramics and Composites
Biophysics
Biomaterials
Mechanics of Materials

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10.1016/j.biomaterials.2004.01.026

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@article{7fd912e0dcdf41069fd4ebcde3008b90,

title = "Effect of resin hydrophilicity and water storage on resin strength",

abstract = "This study evaluated the change in the ultimate tensile strength (UTS) of five polymerised resin blends of increasing hydrophilicity, after ageing in distilled water or silicon oil. Resin blocks were prepared from each resin blend by dispensing the uncured resin into a flexible, embedding mould, containing multiple cavities. The resins were polymerised in the moulds under nitrogen at 551.6kPa and light-activated at 125°C for 10min. After dry ageing for 24h at 37°C, the middle third of each resin specimen was trimmed into an 'I' shape. Fifteen control specimens were randomly selected from each resin blend for baseline UTS evaluation. The UTS of the experimental specimens were determined after 1, 3, 6 and 12 months of ageing in water or oil. The UTS of each group of resins at different storage periods in water or oil were analysed using the Friedman multiple ANOVA on ranks and Dunn's multiple comparison tests at 95% confidence level. Significant reduction (p<0.01) in UTS was observed in Groups II-V resins after 12-month storage in water, while the most hydrophobic Group I resin showed no significant change (p>0.05) in the same period. The percentage reduction in UTS increased with the hydrophilicity of the resin blends. Long-term water storage of hydrophilic resin blends such as those employed in dentine adhesives, resulted in a marked reduction in their mechanical strength that may compromise the durability of resin-dentine bonds.",

keywords = "Hydrophilicity, Resin, Solubility parameter, Ultimate tensile strength",

author = "Yiu, {C. K.Y.} and King, {N. M.} and Pashley, {D. H.} and Suh, {B. I.} and Carvalho, {R. M.} and Carrilho, {M. R.O.} and Tay, {F. R.}",

note = "Funding Information: This study was based on the work performed by Cynthia Yiu for partial fulfilment of the degree of Doctor of Philosophy, the University of Hong Kong. The authors would like to express their gratitude to Amy Wong of the Electron Microscopy Unit, the University of Hong Kong for technical assistance and Shadow Yeung, the University of Hong Kong for performing the statistical analysis. The resin blends used in this study were generous gifts from Bisco, Inc. This study was supported in part, by Grant 20003755/90800/08004/400/01, Faculty of Dentistry, The University of Hong Kong, and by Grant DE 014911 and grant DE 015306 from the National Institute of Dental and Craniofacial Research, USA, and by Grants 300481/95-0, 474226/03-4 from CNPq; and 02/06682-1 from FAPESP, Brazil.",

year = "2004",

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doi = "10.1016/j.biomaterials.2004.01.026",

language = "English (US)",

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AU - Yiu, C. K.Y.

AU - King, N. M.

AU - Pashley, D. H.

AU - Suh, B. I.

AU - Carvalho, R. M.

AU - Carrilho, M. R.O.

AU - Tay, F. R.

N1 - Funding Information: This study was based on the work performed by Cynthia Yiu for partial fulfilment of the degree of Doctor of Philosophy, the University of Hong Kong. The authors would like to express their gratitude to Amy Wong of the Electron Microscopy Unit, the University of Hong Kong for technical assistance and Shadow Yeung, the University of Hong Kong for performing the statistical analysis. The resin blends used in this study were generous gifts from Bisco, Inc. This study was supported in part, by Grant 20003755/90800/08004/400/01, Faculty of Dentistry, The University of Hong Kong, and by Grant DE 014911 and grant DE 015306 from the National Institute of Dental and Craniofacial Research, USA, and by Grants 300481/95-0, 474226/03-4 from CNPq; and 02/06682-1 from FAPESP, Brazil.

PY - 2004/11

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N2 - This study evaluated the change in the ultimate tensile strength (UTS) of five polymerised resin blends of increasing hydrophilicity, after ageing in distilled water or silicon oil. Resin blocks were prepared from each resin blend by dispensing the uncured resin into a flexible, embedding mould, containing multiple cavities. The resins were polymerised in the moulds under nitrogen at 551.6kPa and light-activated at 125°C for 10min. After dry ageing for 24h at 37°C, the middle third of each resin specimen was trimmed into an 'I' shape. Fifteen control specimens were randomly selected from each resin blend for baseline UTS evaluation. The UTS of the experimental specimens were determined after 1, 3, 6 and 12 months of ageing in water or oil. The UTS of each group of resins at different storage periods in water or oil were analysed using the Friedman multiple ANOVA on ranks and Dunn's multiple comparison tests at 95% confidence level. Significant reduction (p<0.01) in UTS was observed in Groups II-V resins after 12-month storage in water, while the most hydrophobic Group I resin showed no significant change (p>0.05) in the same period. The percentage reduction in UTS increased with the hydrophilicity of the resin blends. Long-term water storage of hydrophilic resin blends such as those employed in dentine adhesives, resulted in a marked reduction in their mechanical strength that may compromise the durability of resin-dentine bonds.

AB - This study evaluated the change in the ultimate tensile strength (UTS) of five polymerised resin blends of increasing hydrophilicity, after ageing in distilled water or silicon oil. Resin blocks were prepared from each resin blend by dispensing the uncured resin into a flexible, embedding mould, containing multiple cavities. The resins were polymerised in the moulds under nitrogen at 551.6kPa and light-activated at 125°C for 10min. After dry ageing for 24h at 37°C, the middle third of each resin specimen was trimmed into an 'I' shape. Fifteen control specimens were randomly selected from each resin blend for baseline UTS evaluation. The UTS of the experimental specimens were determined after 1, 3, 6 and 12 months of ageing in water or oil. The UTS of each group of resins at different storage periods in water or oil were analysed using the Friedman multiple ANOVA on ranks and Dunn's multiple comparison tests at 95% confidence level. Significant reduction (p<0.01) in UTS was observed in Groups II-V resins after 12-month storage in water, while the most hydrophobic Group I resin showed no significant change (p>0.05) in the same period. The percentage reduction in UTS increased with the hydrophilicity of the resin blends. Long-term water storage of hydrophilic resin blends such as those employed in dentine adhesives, resulted in a marked reduction in their mechanical strength that may compromise the durability of resin-dentine bonds.

KW - Hydrophilicity

KW - Resin

KW - Solubility parameter

KW - Ultimate tensile strength

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JO - Biomaterials

JF - Biomaterials

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ER -

Effect of resin hydrophilicity and water storage on resin strength

Abstract

Keywords

ASJC Scopus subject areas

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