Devices for the insertion, extraction and fixation of the graft by traction mosaicplasty

Devices for the insertion, extraction and fixation of the graft by traction mosaicplasty

Description
Conventional mosaicplasty was born to treat chondral or osteochondral defects of small size, replacing the damaged cartilage and the subchondral bone by one or more autologous osteochondral grafts. This technique has the following disadvantages:

The set of instruments used has no guidance system that allows keeping the perpendicularity regarding the working area. Keeping this perpendicularity is essential to avoid possible rupture of the cylinders (grafts) to implant.
Insertion of the graft is performed by percussion, i.e. the sensitive chondral tissue to be implanted is inserted by hitting it, which may cause damage to the cellular viability and may lead to a less success of intervention, according to studies realized for this purpose.
Once started the insertion, it is not possible to remove the graft, for example, for its replacement.


Therefore, the research group has improved the conventional mosaicplasty technique, getting the so called Traction Mosaicplasty, by which, through two devices designed specifically for this technique and used in combination, will solve the problems mentioned above.

Advantages


  1. This avoids hitting the delicate chondral cylinder surface, so that its implementation is done by pulling from the outside of the knee and not by hitting from the inside.
  2. The technique incorporates the use of a guide that constantly maintain the necessary perpendicularity regarding the treating area. It makes the technique more reproducible.
  3. It allows both the introduction and removal of the graft, e.g. in case of replacement thereof.

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