The dynamic axial external fixators were divided into straight type, T-type, ankle joint type and proximal femoral type,which are used for Lower limb External Fixation.
Straight type external fixators are used for the External Fixation of the femur.
T-type External Fixator is used for the treatment of complex femoral intercondylar and proximal tibial fractures.
Ankle type external fixators are used for external fixation of ankle fractures.
The proximal femoral fragment external fixator is used for the external fixation of Hip Joint fractures.
Specification
1.Straight type external fixators XL/L is equipped with φ6*150mm 4pcs bone screws, 6mm hex wrench and φ6mm screw driver. M size is matched with φ6*130mm 4pcs bone screws, 6mm hex wrench and φ6mm screw driver. S is matched with φ5*120mm 4 bone screws, 5mm hex wrench and φ5mm screw driver. XS is matched with φ4*100mm 4pcs bone screws, 5mm hex wrench and φ5mm screw driver. 2.T-type external fixator XL/L is equipped with each 2pcs bone screws of φ6*150mm and HBφ6*150mm, 6mm hex wrench and φ6mm screw driver.For size of M, each 2pcs bone screws of φ6*130mm and HBφ6*150mm,matching instruments are 6mm hex wrench and φ6mm screw driver.S is matched with each 2pcs bone screws of φ5*120mm and HBφ5*130mm,5mm hex wrench and φ5mm screw driver.XS is matched with φ4*100mm 4pcs bone screws,4mm hex wrench and φ4mm screw driver.
3.Ankle type external fixators XL/L uses φ6*150mm 4 bone screws, 6mm hex wrench and φ6mm screw driver. M size is matched with φ6*130mm 4 bone screws, 6mm hex wrench and φ6mm screw driver.
4.Proximal femoral fragment external fixator is XL,L.Both of which are equipped with each 2pcs bone screws of φ6*150mm and HBφ6*150mm, 6mm hex wrench and φ6mm screw driver.
Advantages of the orthopedic surgery
1.The operation has the advantages of less trauma, less bleeding, simple operation, short operation time, no aggravation of systemic injury,and is conducive to priority treatment of associated injuries,which saves time for saving lives and saving limbs.Especially those with severe soft tissue injuries,combined with vascular and nerve injuries and osteofascial compartment syndrome.
2.No interference with intramedullary and extramedullary blood supply at the fracture site,no periosteal dissection.The puncture site is far away from the fracture end,which does not destroy the physiological environment of the fracture,and is conducive to fracture healing. There is no implant in the wound,which will not cause foreign body reaction, bone infection, bone exposure and other adverse reactions. It is especially suitable for open fractures.
3.Fixation is reliable and firm,has adjustability.The mechanical properties of the external fixator were stable and reliable.The axial strength of the external fixator was 87.7% of the original bone strength, and the flexural and torsional strength were 64% and 78%, respectively.It had the characteristics of multi-function load,high strength,high stiffness and high stability through biomechanical experiments and analysis. After operation,the spherical universal joint can be used for multi-direction adjustment,which can accurately and conveniently correct various displacements such as rotation and angulation.
4.It has a good biomechanical basis, follows wolff's law and conforms to the elastic fixation criterion.The early rigid fixation provides a biomechanical environment for bone healing. In the meso-stage, the fracture fiber healing can be achieved by loosening the locking group of the compression bar or removing the muscle compression bar, increasing the compressive stress at the fracture end, strengthening the internal reconstruction and shaping of the fracture, and avoiding stress shielding,which conforms to the principle of elastic fixation in fracture treatment.
5.It can make the affected limb move and function recover as soon as possible, and prevent the occurrence of "fracture disease". It is beneficial to the observation and nursing of the limb and skin after fracture fixation. The external fixator is relatively cheap, does not require a second operation, and is easily accepted by patients.
