A surgical fastener system (20, 320, 420, 520) for fastening one or more sutures, the surgical fastener system (20, 320, 420, 520) comprising: (a) a surgical fastener instrument (30, 330, 430, 530), which comprises: an outer delivery tube (36, 336, 436, 536), which has a distal opening (38, 338) at a distal end (40, 340) of the outer delivery tube (36, 336, 436, 536); an inner delivery shaft (42, 342), which is disposed at least partially in the outer delivery tube (36, 336, 436, 536); and a handle (44, 344), which is coupled to a proximal portion of the outer delivery tube (36, 336, 436, 536); and (b) a suture fastener (32, 92, 132), which is removably disposed in the outer delivery tube (36, 336, 436, 536) in an unlocked conical helical configuration (50, 150), characterised in that: the handle (44, 344) comprises a user control element arranged to rotate the inner delivery shaft (42, 342) with respect to the outer delivery tube (36, 336, 436, 536), the surgical fastener instrument (30, 330, 430, 530) is arranged such that distal advancement of the inner delivery shaft (42, 342), when one or more portions of the one or more sutures pass through respective portions of the suture fastener (32, 92, 132), transitions the suture fastener (32, 92, 132) from the unlocked conical helical configuration (50, 150) to a locked planar spiral configuration (50, 152), in which the one or more sutures are fixedly coupled to the suture fastener (32, 92, 132), and the suture fastener (32, 92, 132) is configured to assume the unlocked conical helical configuration (50, 150) when in a resting state, and wherein the surgical fastener instrument (30, 330, 430, 530) is arranged such that the distal advancement of the inner delivery shaft (42, 342) transitions the suture fastener (32, 92, 132) from the unlocked conical helical configuration (50, 150) to the locked planar spiral configuration (50, 152) by axially plastically deforming the suture fastener (32, 92, 132). (a) a surgical fastener instrument (30, 330, 430, 530), which comprises: an outer delivery tube (36, 336, 436, 536), which has a distal opening (38, 338) at a distal end (40, 340) of the outer delivery tube (36, 336, 436, 536); an inner delivery shaft (42, 342), which is disposed at least partially in the outer delivery tube (36, 336, 436, 536); and a handle (44, 344), which is coupled to a proximal portion of the outer delivery tube (36, 336, 436, 536); and an outer delivery tube (36, 336, 436, 536), which has a distal opening (38, 338) at a distal end (40, 340) of the outer delivery tube (36, 336, 436, 536); an inner delivery shaft (42, 342), which is disposed at least partially in the outer delivery tube (36, 336, 436, 536); and a handle (44, 344), which is coupled to a proximal portion of the outer delivery tube (36, 336, 436, 536); and (b) a suture fastener (32, 92, 132), which is removably disposed in the outer delivery tube (36, 336, 436, 536) in an unlocked conical helical configuration (50, 150), characterised in that: the handle (44, 344) comprises a user control element arranged to rotate the inner delivery shaft (42, 342) with respect to the outer delivery tube (36, 336, 436, 536), the surgical fastener instrument (30, 330, 430, 530) is arranged such that distal advancement of the inner delivery shaft (42, 342), when one or more portions of the one or more sutures pass through respective portions of the suture fastener (32, 92, 132), transitions the suture fastener (32, 92, 132) from the unlocked conical helical configuration (50, 150) to a locked planar spiral configuration (50, 152), in which the one or more sutures are fixedly coupled to the suture fastener (32, 92, 132), and the suture fastener (32, 92, 132) is configured to assume the unlocked conical helical configuration (50, 150) when in a resting state, and wherein the surgical fastener instrument (30, 330, 430, 530) is arranged such that the distal advancement of the inner delivery shaft (42, 342) transitions the suture fastener (32, 92, 132) from the unlocked conical helical configuration (50, 150) to the locked planar spiral configuration (50, 152) by axially plastically deforming the suture fastener (32, 92, 132). the handle (44, 344) comprises a user control element arranged to rotate the inner delivery shaft (42, 342) with respect to the outer delivery tube (36, 336, 436, 536), the surgical fastener instrument (30, 330, 430, 530) is arranged such that distal advancement of the inner delivery shaft (42, 342), when one or more portions of the one or more sutures pass through respective portions of the suture fastener (32, 92, 132), transitions the suture fastener (32, 92, 132) from the unlocked conical helical configuration (50, 150) to a locked planar spiral configuration (50, 152), in which the one or more sutures are fixedly coupled to the suture fastener (32, 92, 132), and the suture fastener (32, 92, 132) is configured to assume the unlocked conical helical configuration (50, 150) when in a resting state, and wherein the surgical fastener instrument (30, 330, 430, 530) is arranged such that the distal advancement of the inner delivery shaft (42, 342) transitions the suture fastener (32, 92, 132) from the unlocked conical helical configuration (50, 150) to the locked planar spiral configuration (50, 152) by axially plastically deforming the suture fastener (32, 92, 132).