The study of a commercial dental resin by 1H stray-field magnetic resonance imaging

A dentine/enamel resin containing methacrylate monomers, included in a new generation adhesive system, was used to evaluate the potentialities of recent nuclear magnetic resonance imaging (MRI) techniques to obtain spatially-resolved information on photo-polymerization reaction and subsequent polyme...

Full description

Saved in:
Bibliographic Details
Published in:Polymer (Guilford) 2001-09, Vol.42 (19), p.8051-8054
Main Authors: Nunes, Teresa G, Pires, Ricardo, Perdigão, Jorge, Amorim, Armanda, Polido, Mário
Format: Article
Language:English
Subjects:
Applied sciences
Composite resin
Exact sciences and technology
Photo-polymerization
Physicochemistry of polymers
Polymerization
Polymers and radiations
Stray-field magnetic resonance imaging
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A dentine/enamel resin containing methacrylate monomers, included in a new generation adhesive system, was used to evaluate the potentialities of recent nuclear magnetic resonance imaging (MRI) techniques to obtain spatially-resolved information on photo-polymerization reaction and subsequent polymerization shrinkage. 1H stray-field (STRAFI)-MRI one-dimensional images (1D profiles) of visible-light cured resins were obtained in the presence of oxygen from the atmosphere, and the variation of magnetization with irradiation time was recorded for each resin slice. The polymerization shrinkage was obtained from 1D profiles. The spatial distribution of the unreacted methyl methacrylate groups was obtained from 3D STRAFI experiments. In particular, the thickness of the surface remaining unpolymerised was measured.
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(01)00296-8