A bone anchor comprising: a bone anchor body having a proximal end, a distal end that is spaced from the proximal end along a longitudinal axis, and a perimeter that extends between the proximal end and the distal end, the bone anchor body configured to receive a strand of suture, wherein the bone anchor body defines an aperture that extends into the proximal end; wherein at least a portion of the bone anchor body comprises a deformation material that is responsive to an applied energy so as to deform and, when the strand of suture is received by the anchor body, capture the strand of suture with respect to movement relative to the bone anchor body; wherein the bone anchor body defines first and second channels (42a, 42b) that extend into the perimeter and between the proximal and distal ends (36a, 36b) of the bone anchor body, wherein the deformation material defines at least a portion of each of the first and second channels (42a, 42b), wherein the bone anchor body further defines third and fourth channels (42c, 42d) that extend into the perimeter and between the proximal and distal ends (36a, 36b) of the bone anchor body, and the deformation material defines at least a portion of each of the third and fourth channels (42c, 42d), wherein the deformation material is responsive to an applied energy so as to deform and capture the strand of suture with respect to movement relative to the bone anchor body when the strand of suture is received by at least one of the first, second, third, and forth channels (42a-d), characterized in that the bone anchor further comprises an insert that is insertable into the aperture, the insert defining an aperture that is configured to receive an energy emitting instrument that is configured to apply the energy to the deformation material, wherein the insert is made from a material different than the deformation material, such that the insert does not deform in response to application of the energy. a bone anchor body having a proximal end, a distal end that is spaced from the proximal end along a longitudinal axis, and a perimeter that extends between the proximal end and the distal end, the bone anchor body configured to receive a strand of suture, wherein the bone anchor body defines an aperture that extends into the proximal end; wherein at least a portion of the bone anchor body comprises a deformation material that is responsive to an applied energy so as to deform and, when the strand of suture is received by the anchor body, capture the strand of suture with respect to movement relative to the bone anchor body; wherein the bone anchor body defines first and second channels (42a, 42b) that extend into the perimeter and between the proximal and distal ends (36a, 36b) of the bone anchor body, wherein the deformation material defines at least a portion of each of the first and second channels (42a, 42b), wherein the bone anchor body further defines third and fourth channels (42c, 42d) that extend into the perimeter and between the proximal and distal ends (36a, 36b) of the bone anchor body, and the deformation material defines at least a portion of each of the third and fourth channels (42c, 42d), wherein the deformation material is responsive to an applied energy so as to deform and capture the strand of suture with respect to movement relative to the bone anchor body when the strand of suture is received by at least one of the first, second, third, and forth channels (42a-d), characterized in that the bone anchor further comprises an insert that is insertable into the aperture, the insert defining an aperture that is configured to receive an energy emitting instrument that is configured to apply the energy to the deformation material, wherein the insert is made from a material different than the deformation material, such that the insert does not deform in response to application of the energy.