Implantable artificial ligament, and process for manufacturing such an artificial ligament

An artificial ligament for the treatment of proximal junctional kyphosis, wherein said artificial ligament comprises an elongate braided hollow sheath having an internal volume, and a deformable insert housed in the internal volume of the braided hollow sheath over at least part of the length of said hollow sheath, wherein the artificial ligament has:

• a deformation phase A in which a leading coefficient ka measured over a curve Cla of tensile force (N) vs. elongation (%) of said artificial ligament is less than or equal to 6 Newtons/%;
• and
• a deformation phase B in which a leading coefficient kb measured over said curve Cla of tensile force (N) vs. elongation (%) of said artificial ligament is greater than or equal to 4 Newtons/% and less than or equal to 40 Newtons/%, the elongation of said artificial ligament in said deformation phase B is greater than or equal to 2% and less than or equal to 15%;
• a deformation phase C in which a leading coefficient kc measured over said curve Cla of tensile force (N) vs. elongation (%) of said artificial ligament is greater than the leading coefficient kb of phase B.

A method for manufacturing an artificial ligament wherein said method comprises:

• a) providing a deformable insert,
• b) a step of braiding a hollow sheath, having an internal volume, around said deformable insert, said deformable insert being housed in the internal volume of the braided hollow sheath over at least part of the length of said hollow sheath, and wherein the ligament has:
• a deformation phase A in which a leading coefficient ka measured over a curve Cla of tensile force (N) vs. elongation (%) of said artificial ligament is less than or equal to 6 Newtons/%;
• and
• a deformation phase B in which a leading coefficient kb measured over said curve Cla of tensile force (N) vs. elongation (%) of said artificial ligament is greater than or equal to 4 Newtons/% and less than or equal to 40 Newtons/%, the elongation of said artificial ligament in said deformation phase B is greater than or equal to 2% and less than or equal to 15%;
• a deformation phase C in which a leading coefficient kc measured over said curve Cla of tensile force (N) vs. elongation (%) of said artificial ligament is greater than the leading coefficient kb of phase B.