Claims
- 1. A nonwoven, nonbiodegradable tissue ingrowth-inducing, tissue-interfacing thermoplastic substrate having surface pores of a substantially uniform density, diameter and depth, said pore density in the range of about 20 to 10,000 pores per square centimeter; said uniform pore diameter being in the range of about 50 to 500 microns, said pores characterized by substantially cylindrical shape with substantially flat or slightly curved bottom surfaces.
- 2. A substrate according to claim 1 comprising polyurethane.
- 3. A substrate according to claim 1 comprising polyethylene terephthalate.
Parent Case Info
This is a division of application Ser. No. 07/580,947 filed Sep. 11, 1990, now U.S. Pat. No. 5,213,742.
US Referenced Citations (22)
Divisions (1)
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Number |
Date |
Country |
Parent |
580947 |
Sep 1990 |
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