Three-branched chain parallel external fixation device adopting annular adjustment

Abstract

The invention relates to a three-branched chain parallel external fixation device adopting annular adjustment. The three-branched chain parallel external fixation device comprises a near end ring, a far end ring, a hook joint, a spherical hinge, telescopic branched chains, annular guide rails, adjusting hand wheels, adjusting knobs, kirschner wires and a locking wire chucks. Through kirschner wires, the near end ring and the far end ring of the external fixation device are perpendicularly and rigidly fixed to a deformable bone separately, the annular guide rails are arranged on the near end ring and the far end ring respectively, the adjusting hand wheels are connected with sliding blocks on the annular guide rails, the adjusting knobs are installed on the telescopic branched chains, through the adjusting hand wheels and the adjusting knobs, the sliding blocks move around the annular guide rails, meanwhile, the telescopic branched chains extend or retract, and therefore the three-branched parallel external fixation device realizes 6-DOF movement and can correct any spatial three-dimensional bone deformity. The three-branched chain design is adopted, the annular guide rails are arranged, a 3-PUPS parallel structure is formed, and the three-branched chain parallel external fixation device has the advantages of being simple in structure, large in work space and flexible to operate, being provided with a few movement chains, and not being interfered easily.

Description

technical field [0001] The invention relates to an orthopedic parallel external fixator, in particular to a circularly adjustable three-branched parallel external fixator for fracture reduction and bone deformity correction. Background technique [0002] With the continuous development of science and technology, modern traffic vehicles and building construction, etc. bring convenience to people's life, but also bring potential danger to our life. More and more sudden accidents cause different degrees of orthopedic Trauma, as well as congenital orthopedic diseases and limb deformities, seriously affect people's health and life. External fixator is widely used in orthopedic surgery. It is a micro-invasive tool for reduction, fixation and correction of limb deformities. It has small trauma and wide indications. fixed. Due to less tissue trauma, less blood loss, and less metal implants in the wound, hardware-related infections can be avoided. Its indications mainly include ope...

AI Technical Summary

Problems solved by technology

However, the existing external fixators have problems such as single structure, low adjustment accuracy, small working space, and easy interference between branch chains.

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