External fixture for osteosynthetis

An external fixture for securing bone parts for osteosynthesis, comprising:

• a support having two spaced-apart parallel rods;
• a plurality of holders secured to said rods, each of said holders comprising:
• clamping means formed by a one-piece body constituting a sleeve having a slit defining two juxtaposed clamping surfaces flanking said rods from opposite sides thereof and on opposite sides of said sleeve and formed with respective generally cylindrically segmental cavities receiving the respective rods whereby said rods are clamped between said clamping surfaces, when said members are drawn toward one another, said clamping surfaces on opposite sides of the sleeve being formed with mutually registering holes,
• an operating screw having a head engageable by a user to rotate said screw and a screwthread, said screw passing through said holes and being rotatable to draw said clamping surfaces toward one another and clamp said clamping surfaces against said rods, said operating screw being formed with an axial bore adapted to constrict upon tightening of said screw,
• an internally threaded member engaging the screwthread of said operating screw at an end thereof opposite said head, and
• means including said internally threaded member forming a swivel enabling said screw to swing relative to said body in said holes and locking said swivel into a fixed position in said body upon tightening of said screw into said member;
• and
• a respective bone screw or bone nail passing through and received in a respective one of said axial bores in a respective operating screw, clamped in the respective bore upon tightening of the respective operating screw into the respective member and fixed in a respective one of said bone parts at an angular orientation determined by an angle at which the respective swivel is locked in the respective body.