Hydration dependent mechanical performance of denture adhesive hydrogels

Journal article


Zhang, F, An, Y, Roohpour, N, Barber, AH and Gautrot, JE (2018). Hydration dependent mechanical performance of denture adhesive hydrogels. Dental Materials. 34 (10), pp. 1440-1448. https://doi.org/10.1016/j.dental.2018.06.015
AuthorsZhang, F, An, Y, Roohpour, N, Barber, AH and Gautrot, JE
Abstract

© 2018 The Academy of Dental Materials Objective: Hydration in denture adhesives regulates the formation of complex morphologies and mechanical function. Multiscale experimental approaches are required to evaluate the impact of hydration on the inherent heterogeneity of denture adhesive-based hydrogels at different length scales and the impact of such phenomena on adhesion performance. Methods: The morphology of hydrated denture adhesives was examined via cryo-scanning electron microscopy (cryo-SEM). The rheological and thermodynamic behaviour of bulk hydrated deture adhesives was examined by rheology and differential scanning Calorimetry (DSC). The microscopic mechanical properties of the denture adhesives were characterised by atomic force microscopy (AFM) and compared to the properties measured at the macroscopic scale. Results: The rheological and mechanical properties of commerically available denture adhesive hydrogels were found to be critically dependent on both the formulation of the adhesives and their hydration level. Clear progression of phase separation was observed in hydrated denture adhesives as hydration increased and changed the mechanical properties of the adhesives at multiple length scales. The adhesives displaying more heterogeneous structures, which were associated with the presence of hydrophobic and organic compounds in the formulation, exhibited more variable mechanical behaviour and weaker rheological properties, but stronger adhesive properties. Significance: Our results are important in defining the relationships between hydrophilicity, hydration, mechanical and adhesive properties of denture adhesives, allowing the development of improved chemical formulations that control the fixation of dentures.

Keywords09 Engineering; 11 Medical And Health Sciences; Dentistry
Year2018
JournalDental Materials
Journal citation34 (10), pp. 1440-1448
PublisherElsevier
ISSN0109-5641
Digital Object Identifier (DOI)https://doi.org/10.1016/j.dental.2018.06.015
Publication dates
Print28 Jun 2018
Publication process dates
Deposited29 Aug 2018
Accepted07 Jun 2018
Accepted author manuscript
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Open
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