Textured medical textiles
Described herein are implants (e.g., medical textiles/biotextiles) that include stitched gripping filaments to increase gripping, and methods of forming and using them. In some configurations these apparatuses may be configured as surgical grafts that may be used for soft tissue reconstruction, regeneration, or repair.
1. An implant, the implant comprising:
a sheet of substrate material;
a first strand of material extending adjacent to a first side of the sheet of substrate material;
a plurality of gripping strands extending proud of a second side of the sheet of substrate material, wherein each gripping strand of the plurality of gripping strands comprises one or more arms extending from a vertex in which the gripping strand is wrapped around the first strand of material extending on the first side of the sheet of substrate material; and
a grid pattern stitched through the sheet of substrate material formed by a second strand of material and either the first strand or a third strand of material.
2. The implant of claim 1 , wherein each gripping strand comprises an anchor at an end of the gripping stand opposite the vertex.
3. The implant of claim 2 , wherein the anchor comprises a rounded head.
4. The implant of claim 1 , wherein the plurality of gripping strands comprise a plurality of pairs of V-shaped griping strands.
5. The implant of claim 1 , wherein the plurality of gripping strands each comprises a single gripping arm extending from the vertex and connected by a length of filament extending along the second side of the sheet of substrate material to a vertex of an adjacent gripping arm.
6. The implant of claim 1 , wherein each arm of each gripping stand comprises a tilt angle relative to the second side of the sheet of substrate material that is between about 85 and about 50 degrees.
7. The implant of claim 1 , wherein each arm of each gripping stand is between 3 mm and 0.1 mm long.
8. The implant of claim 1 , wherein the implant comprises a density of gripping strands extending proud of the second side of the sheet of substrate material of between 5-50 gripping strands per cm 2 .
9. The implant of claim 1 , wherein the plurality of gripping strands are formed of a resorbable material.
10. The implant of claim 1 , wherein the first strand of material comprises a resorbable material.
11. The implant of claim 1 , wherein the gripping strand is slidably wrapped around the first strand of material.
12. The implant of claim 1 , wherein the second strand of material is formed of a non-resorbable material.
13. The implant of claim 1 , wherein the grid pattern and the plurality of gripping strands align.
14. The implant of claim 1 , wherein the sheet of substrate material comprises a sheet of extracellular matrix material (ECM) or a stack of sheets of ECM.
15. The implant of claim 14 , wherein the sheet of substrate material comprises a stack of sheets of ECM, wherein the grid pattern is stitched through the stack of sheets of ECM.
16. The implant of claim 1 , wherein the plurality of gripping strands are configured so that a grip strength of the implant is greater than at least twice a gripping strength of the sheet of substrate material without the plurality of gripping strands.
17. The implant of claim 1 , wherein the grid pattern and the plurality of gripping strands are configured so that the implant has a peak compliance strain at a load of 16 Newtons per centimeter (N/cm) that is between 10% and 30%.
18. An implant, the implant comprising:
a sheet of substrate comprising extracellular matrix material (ECM);
a continuous first strand of material extending adjacent to a first side of the ECM;
a plurality of gripping strands extending proud of a second side of the ECM, wherein each gripping strand of the plurality of gripping strands comprises one or more arms extending from a vertex that is slidably wrapped around the continuous first strand of material extending on the first side of the ECM; and
a grid pattern stitched through the sheet of ECM formed by a continuous second strand of material and either the continuous first strand, or a continuous third strand of material.