Failure mechanisms in denture adhesives

Journal article

An, Y, Li, D, Roohpour, N, Gautrot, JE and Barber, AH (2016). Failure mechanisms in denture adhesives. Dental Materials. 32 (5), pp. 615-623. https://doi.org/10.1016/j.dental.2016.01.007
AuthorsAn, Y, Li, D, Roohpour, N, Gautrot, JE and Barber, AH
Abstract

Objective
The mechanical properties of bio adhesives in oral care application are expected to be critical in defining the stability and release of devices such as dentures from the oral tissue. A multiscale experimental mechanical approach is used to evaluate the performance of denture adhesive materials.

Methods
The inherent mechanical behavior of denture fixatives was examined by separating adhesive material from a representative polymethyl methacrylate (PMMA) surface using atomic force microscopy (AFM) approaches and compared to macroscopic mechanical testing.

Results
Failure of denture adhesive material was found to be critically dependent on the formation of fibrillar structures within the adhesive. Small scale mechanical testing provided evidence for the mechanical properties of the fibrillar structures formed within the adhesive in macroscopic mechanical testing and indicated the importance of the forces required to fail the adhesive at these small length scales in controlling both the maximum forces sustained by the bulk material as well as the ease of separating the adhesive from PMMA surfaces.

Significance
Our results are important in defining the performance of denture fixative materials and their control of adhesive behavior, allowing the potential to tune properties required in the adhesion and removal of dentures.

Keywords09 Engineering; 11 Medical And Health Sciences; Dentistry
Year2016
JournalDental Materials
Journal citation32 (5), pp. 615-623
PublisherElsevier
ISSN0109-5641
Digital Object Identifier (DOI)https://doi.org/10.1016/j.dental.2016.01.007
Publication dates
Print12 Feb 2016
Publication process dates
Deposited21 Aug 2018
Accepted18 Jan 2016
Accepted author manuscript
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File Access Level
Open
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