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High resolution solid-state 29si nmr spectroscopy of silicone gels used to fill breast prostheses

✍ Scribed by Laurence Dorne; Nadir Alikacem; Robert Guidoin; Michèle Auger

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
809 KB
Volume
34
Category
Article
ISSN
0740-3194

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✦ Synopsis

Abstract

We have used ^29^Si solid‐state nuclear magnetic resonance (NMR) spectroscopy to study the chemical structure of the silicone gels in virgin and explanted breast prostheses. Despite evidences of alteration in the morphological appearance of the silicone gel inside the breast prosthesis, our results do not reveal changes in the chemical nature and structure of the silicone gels after implantation. In addition to the main ^29^Si resonance peak at −22.26 ppm that corresponds to the resonance frequency of the D repeat unit of the polysiloxane chains, the high sensitivity of our NMR technique allows the detection of very low concentrations of silicone compounds. Within our experimental detection limit of 0.2%, no signal between −90 ppm and −150 ppm are observed. This indicates that no silica products are present inside the gel of the prostheses. Furthermore, our ^29^Si NMR spectra indicate differences in the chemical compositions of the silicone gels from different manufacturers.

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