The papers concerning to the quantitative aspects of degradation of so
me polymers used in medical practice as surgical implants are reviewed
. The quantitative criteria of biocompatibility of these polymers and
the response of the living body are discussed. New experimental data a
re shown on the degradation rate of polyesters, polyamides, elastomers
in the organizm to that in model media. The catalytical activity of b
iological media (water, salts and enzymes) are also considered in deta
il.