1. No protruding heavy knots on the clavicle
2. No need for an interference screw
3. Snug fit of the Clavicular-Clip loop into the clavicular
4. Friction free stability for the Subcoracoid Clip
5. Simple and easy to handle
The Knot Hiding Coracoclavicular Ligament Reconstruction System for Acromioclavicular Joint Separation.
The Clavicular Clip and Subcoracoid Clip are made of medical titanium. The Clavicular Clip is designed to sit flush on the clavicular surface without leaving a protruding knot. The loop of the Clavicular Clip hides the connecting suture knot in the clavicular drill hole. The 5-mm Clavicular Clip loop and the knot located in the 6-mm drill hole, at the same time, squeeze the tendon graft limbs against the clavicular drill-hole wall. An interference screw is unnecessary decreasing the amount of foreign material required.
The Subcoracoid Clip is designed to be a simple device with a smooth crossbar. The interconnecting suture is attached to the Subcoracoid Clip with a loop knot, which reduces friction on the suture. The clips allow the use of a single double-folded No. 5 braided non-resorbable suture. The line between the Clavicular Clip loop and the Subcoracoid Clip is straight through the drill holes: therefore, a No. 5 braided non-resorbable interconnecting suture is sufficiently strong. In cyclical load stress tests, forces up to 400 N per >100 cycles can be applied to suture knots without their snapping depending on the suture material (Mectalent, Oulu Finland; Design Verification Report 2017; No. MEC-157). Subsequent implant removal is not needed.