The invention relates to a tissue anchor which is an open helix of biocompatible material having a slope of from 0.5 to 10 turns per centimeter, a length from 3 to 75 millimeters, a diameter of from 1.5 to 11 millimeters, and an aspect ratio of from about 3 to about 5 to 1. The anchor can have a head...http://www.google.com/patents/US5662683?utm_source=gb-gplus-sharePatent US5662683 - Open helical organic tissue anchor and method of facilitating healing
