A method has been developed, using a silicon-rubber-based sealant, whi
ch allows 2-3-mm-thick specimens to be maintained in a protected fluid
environment for a number of months, without risk of dehydration, Foll
owing this, the specimen can be retrieved, stained, embedded and secti
oned further, For example, 2-mm-thick sections of fixed unstained bone
are easily examined by means of epi-illuminated polarized light and f
luorescence microscopies using either conventional or confocal optics.
The method could easily be extended to other tissues, for example bra
in tissue.