Dynamic external attachment device for osteosynthesis

A pair of dynamic external fixation devices (100) for the reduction of fractures of bone fragments, said devices (100) adapted to be arranged on either side of a first portion of bone (O1) traversed by a first associated pin (10) in a proximal position and a second portion of bone (O2) traversed by a second associated pin (11) in a distal position, each of the dynamic external fixation devices (100) comprising:

• a first body (1) comprising a longitudinal axis profile (X, X′), said first body comprising at least one proximal bore (5) passing therethrough along a bore axis (Y, Y′) and adapted to receive the first associated pin (10);
• a first coil spring, wherein said first body (1) is at least partially inserted into the first coil spring (8);
• a second coil spring, wherein said first spring (8) is nested in the second coil spring (12);
• a second body (13,16,18) with which the second coil spring (12) is engaged, said second body (13, 16, 18) movably engaged with said first body (1), wherein the second body (13, 16, 18) is adapted to engage the second associated pin (11).