This retrospective cohort compared two arthroscopic AC stabilization implants: the Dog Bone double suture-button versus a low-profile AC device. It asks how clavicular tunnel widening develops on postoperative radiographs and whether that widening correlates with loss of reduction.
When you counsel a patient after suture-button AC stabilization, expect tunnel widening on follow-up radiographs. It is common, conical, and occurs at the suture-bone interface where the tear-resistant suture abrades the drill hole.
The mechanistic takeaway is useful: widening reflects micromotion and suture friction, not implant osteolysis. Larger tunnels weaken the clavicle and raise fracture risk, which is why the smallest feasible drill hole is preferred.
Loss of reduction was 62% at 6 months without a single button dislocation or fracture, pointing to suture elongation or rupture as the real failure mode. Because AC ligaments need up to a year to regain strength, early suture failure lets reduction slip.
The implant-specific correlation matters for critical appraisal: widening tracked with lost reduction only for the low-profile device. This is Level III retrospective data with a single unblinded reader and short follow-up, so treat the correlation as hypothesis-generating.
This retrospective cohort compared two arthroscopic AC stabilization implants: the Dog Bone double suture-button versus a low-profile AC device. It asks how clavicular tunnel widening develops on postoperative radiographs and whether that widening correlates with loss of reduction.
When you counsel a patient after suture-button AC stabilization, expect tunnel widening on follow-up radiographs. It is common, conical, and occurs at the suture-bone interface where the tear-resistant suture abrades the drill hole.
The mechanistic takeaway is useful: widening reflects micromotion and suture friction, not implant osteolysis. Larger tunnels weaken the clavicle and raise fracture risk, which is why the smallest feasible drill hole is preferred.
Loss of reduction was 62% at 6 months without a single button dislocation or fracture, pointing to suture elongation or rupture as the real failure mode. Because AC ligaments need up to a year to regain strength, early suture failure lets reduction slip.
The implant-specific correlation matters for critical appraisal: widening tracked with lost reduction only for the low-profile device. This is Level III retrospective data with a single unblinded reader and short follow-up, so treat the correlation as hypothesis-generating.