A medical device has a structure made of a first biodegradable and/or
bioabsorbable material and a second biodegradable and/or bioabsorbable
material. The first biodegradable and/or bioabsorbable material has a
degradation rate that is faster than a degradation rate of the second
biodegradable and/or bioabsorbable material. And, the structure
experiences a period of accelerated degradation upon exposure of the
first biodegradable and/or bioabsorbable material.