Patent ID: 8636784
Filing Date: 2014-01-28
Classification: A61B

Abstract:
1. An attachment device for biological implantation having a longitudinal axis and a longitudinal length, a distal end and a proximal end having a tip, wherein the longitudinal axis and spans from the tip to the distal end, comprising: a screw having a radially expandable section and a radially non-expandable section, wherein the radially expandable section has an expandable section distal end and a radially expandable radius, and wherein the screw has a first cell and a second cell, and wherein the first cell is longitudinally offset from the second cell; and an expander element slidably received by the screw, wherein the expander element comprises an expander head, and a first expander shaft longitudinally extending from the expander head; and wherein the screw comprises radially extending threads, and wherein the expander element comprises radially extending threads; and wherein the screw has a first configuration, and wherein the screw has a second configuration where the expander element is slid along the screw, and wherein the radius of the expandable section distal end in the first configuration is equal to the radius of the expandable section distal end in the second configuration.