Clinical Problen: the avulsion fracture of the MT V bone and the Jones fractures are typical fractures under tenssion and therefore often require osteosynthesis.

Materials and Methods: to avoid soft tissue problems due to the open reduction and implant on the bone surface on the lateral foot a percutaneus technique with a 3,5mm XXS locked compression nail was developed. The fracture is reduced with the gide wire witch is also used for the canulated 3,5mm drill wich prepares the canal for the nail. The locking is performed on both sides of the fracture with one 2mm threated wire and the dynamic compression of the Fracture of the fracture is performed with a set screw in the nail. All patients are allowed to walk free with normal foot wear

From Jul 1999 to Jan.2006 77 patients were treated according to the above technique.

Results: Tha OAFAS of the patients preoperativ was 22 and postoperative 96. No pseudarthrosis or implant failures occured but in 53 patients (69%) implant removal was necessary because patients had discomfort due to the implant.

Conclusion: the XXS nail is a new method for minimal invasive and stable fixation of MTV fractures with full weight bearing capacity in low complication rate. However in most cases implant removal is indicated.