Woven retention devices, systems and methods

摘要

A woven retention device for interfacing with a bone surface includes interwoven filaments forming a tubular lattice with protuberances distributed on interior and exterior surfaces of the lattice at a predetermined spatial relationship. The protuberances are formed by intersecting interwoven filaments. The retention device receives and surrounds a fastener. In a first, relaxed state, the retention device has multiple combinations of filament cross-section geometries at the intersection points, and the multiple combinations of filament cross-section geometries form multiple protuberance thicknesses. In a second state when surrounding at least a portion of the fastener, the retention device distributes pressure from the fastener to multiple points of contact on the exterior surface of the retention device such that a spatial relationship of the protuberances changes as a function of bone density of the bone surface and as a function of an interfacing surface shape of the fastener.

主权项

1. A method of dynamically micro-loading a fastener into a bone hole using a woven retention device, the method comprising:
inserting a woven retention device into a bone hole, the woven retention device having a substantially homogeneous and uniformly, radially distributed pattern of a plurality of interwoven filaments that result in a first spatial relationship of the filaments, apertures, and protuberances, the protuberances being formed at intersections of the interwoven filaments; applying pressure from an interfacing surface of a fastener to an interior surface of the woven retention device; and distributing pressure from the interior surface of the woven retention device to an exterior surface of the woven retention device for transmission of pressure to a bone surface of the bone hole, wherein the pressure from the fastener changes the first spatial relationship of the filaments, apertures, and protuberances of the woven retention device into a second spatial relationship of the filaments, apertures, and protuberances according to a function of bone density and according to a function of a shape of the interfacing surface of the fastener, the changes from the first spatial relationship to the second spatial relationship fostering interdigitation between the woven retention device and the bone surface of the bone hole, and wherein the intersections of the interwoven filaments result in at least three different levels of thicknesses of protuberances.