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Crack prevention of implanted prostheses

  • US 4,851,009 A
  • Filed: 06/15/1988
  • Issued: 07/25/1989
  • Est. Priority Date: 12/16/1985
  • Status: Expired due to Term
First Claim
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1. A method for forming an implantable device for medical use, which device is treated to substantially prevent in vivo cracking thereof, the method comprising:

  • providing a non-woven shaped substrate of an implantable medical device having a biocompatible polymeric surface that is elastomeric and susceptible to cracking when subjected to implantation under in vivo conditions for substantial time periods, said in vivo conditions including those that promote crack-forming degradation of said biocompatible polymeric surface, wherein said biocompatible polymeric surface is a polyurethane;

    applying a crack preventative composition to said elastomeric biocompatible polymeric surface, said crack preventative composition including a silicone material being a siloxane including ##STR5## groups and, when polymerized, being elastomeric and having a predetermined surface tension, said applying step including efecting adsorption of the silicone material onto the biocompatible polymeric surface and bonding between said elastomeric silicone material and said elastomeric biocompatible polymeric surface so as to effect grafting of said polymerized elastomeric silicone material onto said elastomeric biocompatible polymeric surface; and

    said providing step includes selecting said elastomeric biocompatible polymeric surface to have a surface tension that is greater than the predetermined surface tension of said silicone material.

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