Thermo-mechanical analysis of dental silicone polymers View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2006-10-04

AUTHORS

M. -H. Lacoste-Ferré, Ph. Demont, J. Dandurand, E. Dantras, M. Blandin, C. Lacabanne

ABSTRACT

Soft lining materials are used to replace the inner surface of a conventional complete denture, especially for weak elderly patients, with delicate health who cannot tolerate the hard acrylic denture base. Most of these patients have fragile supporting mucosa, excessive residual ridge resorption, particularly on the mandibular arch. The application of a soft liner to the mandibular denture allows absorbing impact forces during mastication and relieving oral mucosa. Actually, the silicone rubbers constitute the main family of commercialised soft lining materials. This study was conducted to understand the relationships between the mechanical properties and the physical structure of polysiloxanes. For this purpose, a series of polysiloxanes of various chemical compositions have been investigated. The evolution of their physical structure as a function of temperature has been followed by differential scanning calorimetry (DSC). In order to facilitate comparisons, the mechanical modulus has been analysed upon the same heating rate using dynamic mechanical analysis (DMA). Polysiloxanes actually commercialised as soft denture liners are three-dimensional networks: the flexibility of chains allows a crystalline organisation in an amorphous phase leading to the low value of the shear modulus. The dynamic mechanical analysis shows that they are used in the rubbery state. So, polysiloxanes have steady mechanical properties during physiological utilisation. More... »

PAGES

7611-7616

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10853-006-0852-7

DOI

http://dx.doi.org/10.1007/s10853-006-0852-7

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1047848381


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