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The advantages achieved

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
    drill hole
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.