A kind of shin bone Medullary fixation deviceTechnical field
The utility model shin bone Medullary fixation device, be it is a kind of be applied to orthopaedics therapy fracture of tibia, carry out broken ends of fractured bone reset,Connection, fixed Medullary fixation device belong to medical instrument, including the main nail of intramedullary nail with lock, cancellous bone pinning, cortex bone lockNail, tail plug.
Background technique
Currently, orthopaedics therapy fracture of tibia is main means using implants, implants are mainly metal bone fracture plate, synthetismSpheric pressure hole, locking screw thread hole or dynamic pressurization and locking screw thread combined hole are set on plate, pass through various forms of synthetismsFracture site is fixed in screw, and then achievees the purpose that treat bone fracture and osteopathy.Wherein: Dynamic Compression Plate, pressurize spiral shellFracture region axial pressure is completed in the placement of nail, forms Titanic micro-plates, such product is when union, no poroma shapeAt may result in infection, bone nonunion and fracture delayed union；Locking screw thread hole, screw thread are arranged on bone plate for locking bone fracture plateIt is formed in a metastable bridge joint and is fixed by lock screw for double thread structure, can generated and be formed with poromaThe second stage of knitting, such product can not pressurize to fracture site, strong bone plate, strong screw and fracture segment pointFrom this triplicity gets up will lead to locking system extraction, broken nail under bone nonunion, stress；Locked pressurized bone plate was bothDynamic Compression Plate use can be served only as, inner support can also be used as to use or upper two ways by lock screwJoint.Bone plate implants are that tension side is fixed, and are easy to happen stress shielding, generate fatigue fracture, implants is caused to be lostEffect.
Summary of the invention
The purpose of this utility model is to provide a kind of shin bone marrow for the deficiency of bone plate implants product described aboveInner fixing device, wherein in the main nail insertion human body pulp cavity of intramedullary nail with lock, cancellous bone pinning and cortex bone pinning pass through cortical bone,Across the main nail nail hole of intramedullary nail with lock, tail plug is screwed in the main nail tailing screw flight hole of intramedullary nail with lock, fracture site is resetted,It connects and fixed, prevents the main nail of intramedullary nail with lock solid failures such as rotation, displacement in pulp cavity, fixed centered on Medullary fixation,Increase the stability of fracture fixation.
2, shin bone Medullary fixation device takes following scheme to implement: shin bone Medullary fixation device includes intramedullary nail with lockMain nail, cancellous bone pinning, cortex bone pinning, tail plug.The main nail of intramedullary nail is hollow structure, and bending angle meets human body at rivet nut twoPhysiological angle, tail portion are helicitic texture, 3 cancellous bone locking nail holes of the angled distribution in proximal end, 1 pressurization locking nail hole, 1 cortex boneLocking nail hole, 5-10 ° of angulation of neck, 4 cortex bone locking nail holes of the angled distribution in distal end, 1 pressurization platform；Cancellous bone pinning is closeNut portion designs for shallow thread, designs close to shank portion for deep thread；Cortex bone pinning is full thread structure, and shallow thread is setMeter；Cancellous bone pinning and cortex bone pinning pass through the main nail nail hole of intramedullary nail with lock by cortical bone.Tail plug is interior hexagonal or interior sixCorner piece shape driving type is connected by screw thread and the main nail of intramedullary nail with lock.
The design of shin bone Medullary fixation device meets Human Physiology anatomical structure, has good biomechanical property, due toIntramedullary nail with lock master, which nails on, in shin bone Medullary fixation device is provided with cancellous bone locking nail hole, pressurization locking nail hole and cortex bone pinningHole can install cancellous bone pinning and cortex bone pinning.The above structure type of the utility model fixes the main nail of intramedullary nail with lockIn subjects bones' pulp cavity, while nail main to intramedullary nail with lock is fixed simultaneously for cancellous bone pinning and cortex bone pinning, preventsRotation, enhances the reliability of fracture fixation, accelerates the healing of fracture, guarantees successful surgery, reduces the risk of second operation, subtractThe pain of few sufferer.
Detailed description of the invention
It is the further explanation in conjunction with attached drawing to the utility model below.
Fig. 1 is the main nail main view of intramedullary nail with lock in shin bone Medullary fixation device.
Fig. 2 is the cancellous bone pinning main view in shin bone Medullary fixation device.
Fig. 3 is the cortex bone pinning main view in shin bone Medullary fixation device.
Fig. 4 is the tail plug schematic diagram in shin bone Medullary fixation device.
Fig. 5 is schematic diagram after the implantation of shin bone Medullary fixation device
Specific embodiment
Referring to attached drawing 1~5, shin bone Medullary fixation apparatus structure has the main nail 1 of intramedullary nail with lock, the angled distribution 3 in proximal endA cancellous bone locking nail hole 1-1,1 pressurization locking nail hole 1-2,1 cortex bone locking nail hole 1-3, the 4 cortex bone locking nail hole 1-4 in distal end,1 pressurization platform 1-5, tail portion are helicitic texture 1-6 (see Fig. 1).Cancellous bone pinning 2 is designed close to nut portion for shallow thread2-1 designs 2-2 close to shank portion for deep thread (see Fig. 2).Cortex bone pinning 3 be full thread structure, shallow thread design (seeFig. 3).Tail plug is helicitic texture 4-1, using interior hexagonal or interior hexagonal flower-shape driving type 4-2,4-3 (see Fig. 4).
When in use, the main nail 1 of intramedullary nail with lock is placed in inside human body pulp cavity for shin bone Medullary fixation device, logical using bone drillThe main nail 1 cancellous bone locking nail hole 1-1, cortex bone locking nail hole 1-3,1-4 of intramedullary nail with lock is crossed, pressurization locking nail hole 1-2 is bored on boneBottom outlet is implanted into cancellous bone pinning 2, is implanted into cortex bone pinning 3, after completing the above operation, screws in tail plug 4, makes tail screw thread 4-1 beyond the Great WallIt is screwed with main nail tailing screw flight 1-6, (see Fig. 5) is completed in the implantation of shin bone Medullary fixation device, completes surgical procedure.