A fixation device for securing tissue to a bone. The fixation device includes an anchor having a hollow body defining a longitudinal passage, and a plug configured to be received in at least a portion of the passage. The body comprises a cylindrical portion and a tapered tip portion. The cylindrical...http://www.google.co.uk/patents/US7914539?utm_source=gb-gplus-sharePatent US7914539 - Tissue fixation device