Hydrophobic and hydrophilic effects on water structuring and adhesion in denture adhesives

Denture adhesives are designed to be moisture‐sensitive through the inclusion of a blend of polymer salts with varying degrees of water‐sensitivity. This enables the adhesive to mix with saliva in vivo and activate its high tack, through the formation of a mucilaginous layer. We report for the first...

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Bibliographic Details
Published in:Journal of biomedical materials research. Part A 2018-05, Vol.106 (5), p.1355-1362
Main Authors: Gill, Simrone K., Roohpour, Nima, An, Yiran, Gautrot, Julien E., Topham, Paul D., Tighe, Brian J.
Format: Article
Language:English
Subjects:
Adhesion
Adhesive bonding
Adhesive strength
Adhesives
Adhesives - chemistry
Bonding strength
Calorimetry
Dentures
Differential scanning calorimetry
Formulations
Freezing
Hydrophobic and Hydrophilic Interactions
Hydrophobicity
Maleic acid
Polymers
Polymethyl methacrylate
prosthodontics
Saliva
Salts
Tensile Strength
Water - chemistry
water‐structuring
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Summary:Denture adhesives are designed to be moisture‐sensitive through the inclusion of a blend of polymer salts with varying degrees of water‐sensitivity. This enables the adhesive to mix with saliva in vivo and activate its high tack, through the formation of a mucilaginous layer. We report for the first time, the use of differential scanning calorimetry to study a series of hydrophobic and hydrophilic polymeric systems in order to correlate water‐structuring behavior with adhesion strength. Adhesive bonding of the more hydrophobic variants was higher than that of a commercial‐based control and a more hydrophilic polymer system in both lap shear and tensile configurations. Water‐binding data suggested that increasing the hydrophobicity of the maleic acid copolymer substituents led to decreased levels of freezing water. In comparison, increasing the hydrophilic nature of the polymer backbone gave higher levels of freezing water within the hydrated samples. The results of this study emphasize the importance of varying the levels of hydrophobic and hydrophilic components within denture adhesive formulations, alongside the types of water present within the adhesive systems. This phenomenon has shown the potential to fine‐tune the adhesive properties and failure mode against poly(methyl methacrylate), surfaces. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1355–1362, 2018.
ISSN:1549-3296
1552-4965
DOI:10.1002/jbm.a.36341