Elastic interlocking intramedullary nail fixed in fractured bone

An intramedullary nail and elastic technology, applied in the direction of internal fixator, fixator, internal bone synthesis, etc., to achieve the effect of high healing strength, reasonable structural design, and low cost

Active Publication Date: 2012-07-04
天津天好医疗器械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Elastic interlocking intramedullary nail fixed in fractured bone
  • Elastic interlocking intramedullary nail fixed in fractured bone
  • Elastic interlocking intramedullary nail fixed in fractured bone

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Embodiment Construction

[0022] The elastic interlocking intramedullary nail for fracture internal fixation provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Such as Figure 1 to Figure 11 As shown, the elastic interlocking intramedullary nail for internal fixation of fractures provided by the present invention includes a main nail 1, a plurality of locking nails 2, an elastic element 3, a slider 4, a main screw 5, an auxiliary screw 6 and a tail cap 7; The main nail 1 is in the shape of a curved rod. According to different fracture sites, the main nail 1 has different angles and bends. One end is an elastic end, and the other end is a fixed end. A large central hole 11 is formed inside the elastic end along the axial direction. A small central hole 10 is formed in other parts of the nail 1 along the axial direction, and the large central hole 11 and the small central hole 10 communicate with each other. A...

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Abstract

An elastic interlocking intramedullary nail fixed in a fractured bone comprises a main nail, a plurality of lock nails, an elastic element, a slide block, a main jackscrew, an auxiliary jackscrew and a tail cap. A large central hole and a small central hole are formed in the main nail, a plurality of radial locking holes are formed at the fixed end, and two slide holes and an auxiliary jackscrew hole are formed at the elastic end. The auxiliary jackscrew is connected in the auxiliary jackscrew hole. The lock nails are inserted into the locking holes and the slide holes. The elastic element, the slide block and the main jackscrew are arranged in the large central hole. The tail cap is connected at the outer end of the large central hole. The elastic interlocking intramedullary nail fixed in the fractured bone utilizes the elastic element to enable the lock nails at the elastic end to be capable of axially moving in the slide holes along the main nail and then driving the broken end of the fractured bone to move axially, thereby eliminating stress shielding effect of the broken end of the fractured bone, shortening a fracture healing period and being in conformity with the biomechanic fixing principle. In addition, interrupted stimulation of the broken end of the fractured bone facilitates the healing of the fractured bone, and the healing strength is high.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an elastic interlocking intramedullary nail for internal fixation of fractures. Background technique [0002] At present, interlocking intramedullary nails are often used in the clinical treatment of tubular bone fractures. Although intramedullary fixation conforms to the mechanical principle, and has the advantages of firm fixation, early functional exercise, early weight bearing, and prevention of shortening and rotation between the fracture ends, the strong axial fixation will cause stress shielding of the fracture ends. , thus causing side effects such as decreased bone density and prolonged fracture healing period. According to research at home and abroad, the best way to treat fractures is elastic fixation. Elastic fixation conforms to biomechanical characteristics, and the fracture healing period is short, and the fracture ends heal stronger and more firmly. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/72
Inventor 冀原
Owner 天津天好医疗器械有限公司
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