A suture anchor is formed of a material which absorbs body liquid when exposed to body liquid. The anchor may be at least partially formed of a material having a strong affinity for body liquids. This enables the anchor to absorb body liquid and expand upon being inserted into a patient's body. At least...http://www.google.de/patents/US6572635?utm_source=gb-gplus-sharePatent US6572635 - Suture anchor
