Prosthetic knit with grip properties, method for its production, and reinforcement implant for treatment of parietal defects
A prosthetic knit for medical or surgical use which has a structure made of monofilament and/or multifilament yarn which is biocompatible and optionally partially bioabsorbable. According to the invention, this knit comprises a monofilament sheet forming, on one face of the knit, spiked naps which protrude perpendicularly with respect to said sheet, that is to say naps each having a substantially rectlinear body and, at the free end of this body, a head of greater width than that of this body.
1. A prosthetic knit comprising an implantable tissue reinforcing knitted fabric having a first tissue gripping face including a plurality of spiked naps configured to directly fasten the knitted fabric to tissue, the spiked naps made of a bioabsorbable material and having a body and a head, the head having a greater width than the body and a generally spheroidal or mushroom shape.
2. A prosthetic knit as in claim 1 wherein the body of the spiked naps comprises a monofilament.
3. A prosthetic knit as in claim 1 wherein the body of the spiked naps comprises a monofilament made from polylactide.
4. A prosthetic knit as in claim 1 wherein the body of the spiked naps has a diameter of over 0.10 mm.
5. A prosthetic knit as in claim 1 wherein the spiked naps are present on the first face of the knitted fabric at a density between 50 and 90 naps per cm 2 of the knitted fabric.
6. A prosthetic knit as in claim 1 wherein the knitted fabric comprises open pores on the first face having a diameter of between 1 and 3 mm.
7. A prosthetic knit as in claim 1 wherein the knitted fabric comprises a plurality of sheets of interlaced yarns which together form a three-dimensional structure.
8. A prosthetic knit as in claim 1 wherein the knitted fabric comprises a monofilament yarn.
9. A prosthetic knit as in claim 1 wherein the knitted fabric comprises a multifilament yarn.
10. A prosthetic knit as in claim 1 wherein the knitted fabric comprises a bioabsorbable yarn.
11. A method comprising: (i) providing an implantable knitted fabric having a first tissue gripping face including a plurality of spiked naps, the spiked naps made of a bioabsorbable material and having a body and a head, the head having a greater width than the body and a generally spheroidal or mushroom shape, and (ii) positioning a portion of the first tissue gripping face into contact with tissue so that the spiked naps directly fasten the knitted fabric to the tissue.
12. The method of claim 11 , wherein positioning the portion of the first tissue gripping face includes reinforcing a parietal defect in the tissue.
13. The prosthetic knit as in claim 1 wherein the body of the spiked naps has a length of between 1 mm and 2 mm.
14. The prosthetic knit as in claim 1 wherein the knitted fabric comprises a non-absorbable yarn.
15. The prosthetic knit as in claim 1 wherein the knitted fabric includes a second face having no spiked naps.