Tensionable knotless acromioclavicular repairs and constructs
Systems and methods for AC joint dislocation surgical repairs, without knot tying. The surgical systems include two fixation devices (for example, a button and an anchor) joined by strand of flexible material having a knotless, self-cinching, adjustable loop with two splices that attach to the two fixation devices. The knotless, adjustable loop/fixation devices allow for tensioning of the AC repair after the anchor implantation.
1. A knotless system for acromioclavicular surgical repairs, comprising:
a fixation device comprising a cannulated anchor body having a cylindrical configuration with a longitudinal axis, a proximal end and a distal end, an outer surface, a tip provided at the distal end and a flange located at a most proximal end, the fixation device further comprising a transversal eyelet provided at the tip at the distal end and extending in a direction perpendicular to the longitudinal axis, the transversal eyelet communicating with outer surfaces of the tip and with a most distal surface of the tip through a pair of longitudinal-extending outer channels, the longitudinally-extending outer channels extending from the transversal eyelet and to the outer surface of the anchor body; and
a knotless suture construct pre-loaded on the fixation device, the knotless suture construct comprising a flexible strand, a flexible continuous loop with an adjustable diameter formed in the flexible strand, and two splice regions formed within the flexible continuous loop, the knotless suture construct extending through the cannulated anchor body and the eyelet, and with the flexible strand being further threaded through the eyelet to form two flexible loops with fixed diameter, the two flexible loops with fixed diameter passing and sliding through the eyelet and the longitudinally-extending outer channels.
2. The knotless system of claim 1 , wherein the fixation device is an anchor with a T-shape configuration.
3. The knotless system of claim 1 , wherein the flange has a diameter about twice the diameter of the cannulated anchor body.
4. The knotless system of claim 1 , wherein the cannulated anchor body has an opening at a most proximal end configured to receive a driver head for driving the fixation device.
5. The knotless system of claim 1 , wherein the cannulated anchor body is provided with a plurality of circumferential ribs extending from an outer surface of the anchor body.
6. The knotless system of claim 1 , wherein the flexible strand is a suture formed of ultrahigh molecular weight polyethylene.
7. The knotless system of claim 1 , further comprising a pull suture threaded through the two loops with a fixed diameter, to shuttle the two loops through tunnels formed in a clavicle and a coracoid.
8. The knotless system of claim 1 , wherein the flexible continuous loop with an adjustable diameter comprises two flexible limbs extending from the flexible continuous loop.