For many applications the stability of the biomaterial is of crucial importance. On the one hand, we quantify the long-term stability of materials. We also examine the degradation behavior of resorbable materials – because, for certain applications, precisely the opposite is required. For example, suture material or fixing screws for bone fractures should, as far as possible, degrade in the body after the healing process, so that no further surgical procedure is necessary. Every biomaterial is sterilized before use. Gamma or UV radiation, steam or ethylene oxide sterilization subject the materials to a varying degree of stress. We analyze the sterilized material and insure that, even after sterilization, the customized biomaterial still has the required stability characteristics.