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Soft tissue implant with micron-scale surface texture to optimize anchorage

  • US 5,219,361 A
  • Filed: 08/12/1992
  • Issued: 06/15/1993
  • Est. Priority Date: 09/16/1988
  • Status: Expired due to Term
First Claim
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1. A soft tissue implant device to be at least partially embedded at an implantation site and surrounded in organic tissue of a living organism while promoting anchorage of the device at the implantation site and the growth of collagen at the implantation site, without causing encapsulation of the embedded portion of the device and without causing inflammatory tissue at the implantation site, the device comprising:

  • (a) a body;

    (b) a surface layer secured to said body and extending over a sufficient portion of said body so that only said surface layer contacts the organic tissue at the implantation site;

    (c) said surface layer defining a plurality of three-dimensional features;

    (d) said features defining an exterior surface for presenting itself to living cells in organic tissue at the implantation site;

    (e) said exterior surface defining a plurality of spaces for presenting themselves to living cells adjacent said exterior surface;

    (f) each said space having a bridging distance being the minimum distance an adjacent cell must stretch to span diametrically across said space, said bridging distance being measured in a direction parallel to said exterior surface at said space; and

    (g) said plurality of spaces defining a statistical mean bridging distance ranging from greater than 1.4 microns to less than 1.9 microns with a standard deviation of less than 65% of said mean bridging distance.

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