CN104771221A - Intramedullary nail used for inserting into target bone and special guiding system for intramedullary nail used for inserting into target bone - Google Patents
Intramedullary nail used for inserting into target bone and special guiding system for intramedullary nail used for inserting into target bone Download PDFInfo
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- CN104771221A CN104771221A CN201510194899.XA CN201510194899A CN104771221A CN 104771221 A CN104771221 A CN 104771221A CN 201510194899 A CN201510194899 A CN 201510194899A CN 104771221 A CN104771221 A CN 104771221A
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- target bone
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- 238000001356 surgical procedure Methods 0.000 abstract 1
- 206010017076 Fracture Diseases 0.000 description 51
- 208000010392 Bone Fractures Diseases 0.000 description 48
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- 230000037431 insertion Effects 0.000 description 5
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Abstract
The invention provides an intramedullary nail used for inserting into a target bone and a special guiding system for the intramedullary nail used for inserting into the target bone. The intramedullary nail is approximately in a 7 bending shape; the thickness of the intramedullary nail is gradually reduced from the near end to the remote end; the near end of the intramedullary nail is provided with a plane which is inosculated with a combined steel plate; the end face of the near end of the intramedullary nail is provided with a hole channel in advance, through which a kirschner wire or a bolt penetrates or a suture line is fixed; a corrugated arc structure is formed between the near end of the intramedullary nail and the remote end of the intramedullary nail; the corrugated arc structure is provided with a plurality of multidirectional locking screw holes into which corresponding bolts are inserted, so that the intramedullary nail is tightly fixed with diaphysial sclerotin. The special guiding system is used for assisting the intramedullary nail to be accurately butt-jointed and fixed with the combined steel plate, and guiding the bolts to be inserted in the correct fixation directions at the same time. By utilization of the intramedullary nail and the precise guiding effect of the special guiding system, not only can the fracture reduction after surgery be prevented from being eliminated, but also the side injury caused by surgical operation can be prevented, therefore an excellent clinical after-healing effect is realized.
Description
Technical field
The present invention relates to trauma fracture Internal fixation technology field, particularly a kind of intramedullary pin for inserting target bone and special guidance system thereof, being particularly useful for treating proximal humeral fracture.
Background technology
The gerontal patient loose with fracture often easily fractures, and how to wait Mild Violence to cause by falling, and classification of fracture and the fracture fragment degree that is shifted often have larger difference.At present, there is multiple therapy methods for such fracture clinically, but depend on patient age, classification of fracture and local soft tissue condition.
Particularly for proximal humeral fracture, in order to multiple for proximal humerus sclerite is resetted and fixed, usually adopt the multinomial technology such as Kirschner wire, steel plate, intramedullary pin.Utilize existing above-mentioned technique for fixing, although also can union of fracture be made, still have unsolved weak point.Main weak point is: for common complex proximal humeral fractures type clinically, especially with osteoporosis person, fixing may the having of steel plate screw is used to fix not firm and move back nail risk, even cause steel plate deformed or fracture, and the process inserting steel plate often causes comparatively serious fracture surrounding soft tissue damage, the destruction of fracture region blood vessel certainly will be increased the weight of, caused the problem that fracture delayed union does not even heal.And when using conventional Intramedullary nailing, often need to squeeze into from head of humerus articular surface, cause damage of articular surface, also can cause damage to proximal humerus shoulder sleeve structure simultaneously, affect operation in patients back porch joint function recovery effect, and intramedullary pin anti-torsion weak effect, often effectively cannot fixedly secure the multiple fracture fragment of proximal humerus, thus reducing the firmness of fracture fixation, the patient serious for osteoporosis is all the more so, reduces union of fracture effect.
Summary of the invention
The object of the invention is to, also existing fixing insecure for solving existing fracture fixation technology, easily the problem of damage is caused to fracture surrounding soft tissue and joint, a kind of intramedullary pin for inserting target bone and special guidance system thereof are provided.By this intramedullary pin and guidance system with the use of, the deficiency of above technique for fixing can be overcome, while having both intramedullary pin and steel plate advantage concurrently, evaded the risk causing postoperative complication and fracture fixation failure, improve the therapeutic effect of operation.
For achieving the above object, the invention provides a kind of intramedullary pin for inserting target bone and special guidance system thereof, described intramedullary pin roughly in " 7 " font bending shape, and by slightly gradually carefully distally extending; The near-end of described intramedullary pin has the plane chimeric with combined steel plate, and proximal face is preset with duct, for penetrating Kirschner wire, and screw or fixing stitching thread; Be corrugated arcuate structure between the near-end of described intramedullary pin and far-end, and be provided with some multidirectional locking screws, intramedullary pin and key sclerotin closely can be fixed after squeezing into corresponding screw.
As the further improvement of technique scheme, the chimeric plane between the near-end of described intramedullary pin and combined steel plate is provided with the groove structure and connecting screw hole that are fitted and fixed with, for intramedullary pin and combined steel plate being fixedly secured by Kirschner wire and attachment screw.
As the further improvement of technique scheme, the chimeric plane between the near-end of described intramedullary pin and combined steel plate is oval, and this intramedullary pin has the screw that on upper and lower two connecting screw holes and combined steel plate, central area is provided with to match.
As the further improvement of technique scheme, the middle part of described intramedullary pin have at least one place lock screw be have a kind of female thread or around wedge-shaped groove structure.
As the further improvement of technique scheme, described intramedullary pin proximal end plane there are at least two transversely arranged place's kirschner pin holes, for penetrating Kirschner wire fixation sclerite after the reduction of the fracture.
As the further improvement of technique scheme, described intramedullary pin bending part has at least one place or two places locking screw to be diagonal fixing threaded hole, for fixing humeral head sclerite by squeezing into lock screw.
As the further improvement of technique scheme, the locking screw of described intramedullary pin bending part have female thread or around wedge-shaped groove structure, fix to squeeze into lock screw.
As the further improvement of technique scheme, described female thread or around the pitch of wedge-shaped slot between 0.6mm-1.2mm.
Based on the above-mentioned intramedullary pin for inserting target bone, present invention also offers a kind of special guidance system, this special guidance system is used for auxiliary intra medullary nail and docks with fixing with the accurate of combined steel plate, guides simultaneously and screw is squeezed into correct fixed-direction; It comprises intramedullary pin-steel plate holder, and top and combined steel plate are fitted, and other arm distance skeleton pulp cavitys be arranged in parallel; Top and arm there is several pilot hole, for matching with the locking screw of intramedullary pin connecting screw hole and far-end respectively.
Described guidance system changes the inserting needle path of conventional intramedullary nails, reduce the fixing Accessory injury (ligament in such as joint and important accessory structure etc.) being difficult to go beyond of operation to greatest extent, fully effectively steel plate and the fixing advantage of intramedullary pin two kinds are combined, also overcome mutual shortcoming dexterously simultaneously.
Described intramedullary pin determines its size and shape according to the target medullary canal inserted, and the near-end of this intramedullary pin to the stock of far-end undulate, and runs through and is provided with several fixing threaded holes on this stock; Described steel plate have connecting portion groove and the connecting screw hole and the fixing threaded hole that run through this plate, be respectively used to wear attachment screw and hold-down screw, determine according to the chimeric plane of this intramedullary pin at the size and shape of the groove with intramedullary pin connecting portion, to hold intramedullary pin near-end joint face in chimeric mode, the shape of connecting portion is the connection of nonrotary, the connection that angulation is stable between steel plate and intramedullary pin; And the attachment screw that size and shape is determined, when being positioned the top of the target part of bone with the alignment expected with convenient steel plate and intramedullary pin, attachment screw can be made to enter the target part of intramedullary pin via the connecting screw hole on steel plate, and enter in the attachment screw hole of intramedullary pin.
When utilizing above-mentioned intramedullary pin to be fixed fracture, first intramedullary pin is inserted in the spinal canal of fractured bone, and by the hold-down screw that intramedullary pin wears, itself and bone are fixed; Then by the target part of Interal fixation in bone to be treated, utilize the attachment screw of angle stabilization to be connected with intramedullary pin by steel plate, to make the fragment of fracture be fixed together, stablize the bone portion of fracture.
The advantage of a kind of intramedullary pin for inserting target bone of the present invention and special guidance system thereof is:
Described intramedullary pin cervical region is bending arc, particularly proximal humerus is squeezed into by outside diagonal after its greater tubercle, do not destroy head of humerus articular surface, avoid supraspinatus stop simultaneously, proximal humerus is avoided to take on sleeve structural damage, be provided with special fixing threaded hole between intramedullary pin and combined steel plate, by the hold-down screw locking worn, make steel plate-intramedullary pin combination closely can be fixed on fracture site.Intramedullary pin inserts long bone pulp cavity, good fixation is played to cripetura or lateral displacement, this intramedullary pin is equivalent to the effect of " ground ", based on this, the hold-down screw making steel plate pass through to wear can stablize the sclerite disperseed around fixing fracture region, correct the displacements such as rotating separation, bonding crack line tying technology can well maintain the stable of fracture area.Meanwhile, when intramedullary pin and combined steel plate are inserted, do not need cleavage fracture surrounding soft tissue on a large scale, can be good at the supply protecting fracture region blood.Like this, the accurate guide effect of above-mentioned intramedullary pin and special guidance system thereof is utilized to achieve the Wicresoft of operation, both the problem that postoperative is lost had been solved, the fixing of surrounding bone folded block can be maintained again, larger Interal fixation can also be avoided the fracture end ischemia problem caused by the too much destruction of soft tissue, thus reach good clinical rear effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the intramedullary pin in the embodiment of the present invention.
Fig. 2 is the side sectional view of the intramedullary pin shown in Fig. 1.
Fig. 3 is the combined steel plate structural representation in the embodiment of the present invention.
Fig. 4 is the structural representation of the guidance system in the embodiment of the present invention.
Fig. 5 is the guidance system utilized shown in Fig. 4, and the intramedullary pin in the embodiment of the present invention and combined steel plate are fixed on the schematic diagram in humerus medullary cavity.
Reference numeral
1, intramedullary pin 2, combined steel plate 3, attachment screw
4, guidance system 5, connecting screw hole 6, fixing threaded hole
7, kirschner pin hole 8, pilot hole 9, near-end connect plane
10, groove 11, proximal humerus 12, hold-down screw
Detailed description of the invention
Below in conjunction with drawings and Examples, a kind of intramedullary pin for inserting target bone of the present invention and special guidance system thereof are described in detail.
As shown in Figure 1, 2, a kind of intramedullary pin for inserting target bone of the present invention is a special moulding intramedullary pin 1, and described intramedullary pin is roughly " 7 " font bending shape, and by slightly gradually carefully distally extending; The structure of cardinal principle undulate between the near-end of described intramedullary pin and far-end, for inserting medullary cavity.The near-end of described intramedullary pin has the near-end chimeric with combined steel plate to connect plane 9, and proximal face is preset with duct, for inserting steel wire, screw or the similar assembly of fixing this intramedullary pin, comprising near-end and connecting plane and far-end flexing.One connects plane 9 with intramedullary pin near-end and contacts fixing combined steel plate, has loose structure and radian, adapt and provide at least 1 screw to insert screw or similar assembly, combined steel plate and intramedullary pin are connected and fixed with cortical bone.
Based on the intramedullary pin of said structure, it is oval that described intramedullary pin near-end near-end vertically connects plane 9, connects in plane 9 offer one or more insertion attachment screw that is used for intramedullary pin is combined fixing connecting screw hole 3 with combined steel plate at this near-end.The number of connecting screw hole 3 is in the present embodiment two.In addition, connect in plane 9 at this near-end, also offer one or more kirschner pin hole 7 be used for as Kirschner wire, the number of kirschner pin hole 7 is two in the present embodiment.
As shown in Figure 2, between the near-end of described intramedullary pin 1 and far-end, horizontally vertical direction bends and part to downward-extension is called cervical region, intramedullary pin near-end connection plane 9 and cervical region at an angle, about 100 ° ~ 130 °, meet the anatomical features of respective target bone after making intramedullary pin-steel plate combination.This near-end connects plane 9 has one or more insertion hold-down screw that is used for so that the fixing threaded hole 6 of fixing sclerite.The number of the fixing threaded hole 6 of cervical region is two in the present embodiment.The pars intermedia of described intramedullary pin 1 also offers one or more insertion hold-down screw that is used for so that by whole intramedullary pin 1 and the key fixing threaded hole 6 fixedly secured, the number of the fixing threaded hole 6 of intramedullary pin pars intermedia is three in the present embodiment.In the present embodiment, the far-end of described intramedullary pin 1, also known as afterbody, be the tapered structure of S type, this special plasticity is convenient to intramedullary pin to squeeze in medullary cavity from femoral head greater tubercle side, and maintains intramedullary pin stablizing in pulp cavity.
Connecting screw hole on described intramedullary pin and fixing threaded hole all have the diameter of fixed size, to match with corresponding attachment screw and hold-down screw, and each screw be female thread or around wedge-shaped groove structure, on this and the respective screws head of a nail, in screw thread or rivet nut, screw thread matches.
Described combined steel plate also claims marrow extenal fixation steel plate, to contact and fixedly secure by certain way with intramedullary pin, simultaneously can by through the screw of steel plate or kirschner pin hole drivescrew or Kirschner wire, with the sclerite of fixing humerus head end.As shown in Figure 3, stable in order to further Maintenance Unit bone ends fracture fragment, in the present embodiment, the marginal portion of this combined steel plate is provided with six kirschner pin holes, for through steel wire or suture to be fixed sclerite.Concrete embodiment is: as shown in Figure 3, have and to be connected in the fit side of fracture region of combined steel plate 2 ellipse or similar groove 10 that plane adapts with intramedullary pin near-end, be provided with the duct allowing to insert attachment screw and Kirschner wire respectively in groove 10, and each duct on combined steel plate matches with the duct that intramedullary pin near-end is connected plane.Namely when combined steel plate and intramedullary pin connect after plane contacts combination in the mode expected, Kirschner wire and attachment screw can be allowed to pass both kirschner pin hole 7 and connecting screw hole 5 simultaneously, now, first should insert Kirschner wire, temporary transient maintenance steel plate and the metastable position of intramedullary pin, be then screwed into attachment screw both are stable fixing further.In addition, described combined steel plate is being equipped with several fixing threaded holes 6 along its edge.In the present embodiment, it is four for the number of fixing threaded hole 6 through hold-down screw, for being two through attachment screw with the number of the connecting screw hole of junction steel plate and intramedullary pin.They lay respectively at the corner of combined steel plate and the position of central authorities.
As shown in Figure 3, in the present embodiment, in order to reduce the outer steel plate of marrow further to the pressure of periosteum, the profile of this steel plate is made into the profile being close to anatomically bone.Namely this combined steel plate 2 is looked from front as rectangle, also can be designed to square, rectangle, circle or oval.The one side of its fractures dorsad of looking from the side has certain radian, namely described combined steel plate 2 is being concave structure towards the one side of fracture site, the radian on described concave surface and fracture site surface matches, to fit skeleton profile, and wraps up fracture fragments.The design of its arc-shaped concave meets the anatomical features of skeleton, to increase steel plate to sclerite or containing and the compressing of pulverizing bone block, is conducive to Micro-operation, solves the problem that sclerite syntripsis can not make to be screwed.For reducing the pressure that device is formed periosteum further, this combined steel plate has wavy surface towards the concave surface of periosteum side, to reach the object of Limited contact.
After combined steel plate is connected plane contact with intramedullary pin near-end, insert one or more Kirschner wire by kirschner pin hole and maintain the stable of intramedullary pin-steel plate combination, the attachment screw be screwed into further, the pitch being connected the connecting screw hole in plane and the connecting screw hole on steel plate by himself screw thread with intramedullary pin near-end is adapted, and makes combined steel plate and intramedullary pin reach stable fixing object.Described female thread or around the pitch of wedge-shaped slot can be arranged between 0.6mm-1.2mm.
Based on intramedullary pin and the combined steel plate of said structure, the specification of described combined steel plate can be designed to 30mm*25mm, and the groove thickness that its centre contacts with intramedullary pin can between 1mm to 2mm, and this steel periphery thickness can between 3mm to 4mm.The length of intramedullary pin is approximately 20cm, can be designed to random length according to demand.Titanium alloy material is preferably adopted to make.Angle between the axis of each fixing threaded hole 6 that the confession hold-down screw that described intramedullary pin 1 is offered penetrates and surface of steel plate centrage is 5 °-10 °, makes the radial sensing combined steel plate 2 of hold-down screw be arranged in each fixing threaded hole 6.
As shown in Figure 5, present invention also offers a kind of special guidance system of intramedullary pin, this guidance system is used for auxiliary intra medullary nail and docks with fixing with the accurate of combined steel plate, guides simultaneously and screw is squeezed into correct fixed-direction; It comprises intramedullary pin-steel plate holder, and top and combined steel plate are fitted, and other arm distance skeleton pulp cavitys be arranged in parallel; Top and arm there is several pilot hole, for matching with the fixing threaded hole of intramedullary pin connecting screw hole and far-end respectively.Described guidance system changes the inserting needle path of conventional intramedullary nails, reduce the fixing Accessory injury (ligament in such as joint and important accessory structure etc.) being difficult to go beyond of operation to greatest extent, fully effectively steel plate and the fixing advantage of intramedullary pin two kinds are combined, also overcome mutual shortcoming dexterously simultaneously.
The step utilizing the intramedullary pin of said structure to carry out skeletal fixation is: for the fracture site of complexity, especially as the type of proximal humeral fracture, after the reduction of the fracture, intramedullary pin is squeezed into by outside after head of humerus greater tubercle (avoiding shoulder sleeve stop position) direct motion, after intramedullary pin enters fracture area far-end pulp cavity, by screw, itself and key sclerotin are fixed, while maintaining the reduction of the fracture, combined steel plate is fixed on humerus head end, and by special screw, steel plate and intramedullary pin are fixedly secured, then be screwed into hold-down screw by the screw on steel plate and fix head of humerus surrounding bone folded block position, utilize multidirectional lock screw steady lock intra medullary nail far-end and each position of tail end, and bonding crack line tying technology, to maintain the stable fixing of fracture area.
Below for proximal humeral fracture, with reference to figure 1-5, utilize intramedullary pin-steel plate of the present invention to combine the main operating process carrying out fracture fixation to be:
Step 1) select the case of clinical middle proximal humeral fracture Neer typing two parts, three parts and four partial fractures, allowing patient be positioned at ray can on the sandy beach seat of operating-table thoroughly.With the shoulder of cushioned support patient, and the arm of fracture is placed on adjustable side stage or arm-rest frame, guarantees that arm can be fully bending, allow head of humerus be exposed to acromion front.
Step 2) select suitable otch, expose fracture region.By Indirect reduction and tractive suturing skill, use detacher or use Kirschner wire to reset to fracture site as control stick.If necessary, Kirschner wire fragment of fracturing can be used in implants insertion process temporary fixed in place.Guarantee that Kirschner wire can not hinder the insertion of intramedullary pin, after reset, can fracture fixation be carried out.
Step 3) select suitable entry point to punch in proximal humerus, after desirable entry point is positioned at intertubercular sulcus mid point, outside 5mm is apart from head of humerus articular surface 10mm place, upside, avoid supraspinatus stop and articular surface, insert Kirschner wire as labelling, open one side bone cortex by hollow boring bit or hole making drill.
Step 4) intramedullary pin 1 and guidance system 4 to be assembled, side direction places guidance system, and guidance system 4 is matched with the junction of intramedullary pin 1, by attachment screw 3, both are stable fixing, is assembled by above-mentioned fixed form.Utilize guidance system 4 to insert intramedullary pin 1 as handrail from the punching diagonal of proximal humerus 11 subsequently, slightly twist guidance system 4 to be advanced in medullary cavity by intramedullary pin 1.Along with depth of needle changes the angle of guidance system 4 gradually.When intramedullary pin 1 is advanced to fracture site, reseting fracture also continues propelling and enters backbone.The position of intramedullary pin 1 is checked in the anteroposterior position and side direction perspective of proximal humerus 11.
Step 5) confirm that intramedullary pin position is satisfied after, the pilot hole 8 be provided with by guidance system 4 inserts a trocar molectron (comprising drill bushing and the trocar), pilot hole 8 through guidance system 4 aiming arm far-end does a minimal incision * on skin, and careful separation is to bone surface, avoid causing damage to the neurovascular structure of surrounding and soft tissue.Advance trocar molectron, the trocar is pushed against bone surface, take out sleeve pipe syringe needle.
Step 6) sleeve pipe syringe needle take out after sleeve pipe in insert drill bit with a scale, carefully hole, bore two-layer cortical bone, until bit point of the drill just worn out inner side cortex.Use C-arm to confirm bit location, drill bushing is firmly pressed in cortex, to guarantee to measure accurately.
Step 7) after boring completes, read required screw length data from drill bit with a scale, remove drill bit and drill bushing.Screwdriver is combined with hold-down screw 12, hold-down screw 12 is locked in by penetrating pilot hole 8 fixing threaded hole 6 place that intramedullary pin 1 in medullary cavity is provided with, intramedullary pin is fixed in medullary cavity further.For the hold-down screw of remaining intramedullary pin, repeat above-mentioned steps, after each fixing threaded hole 6 place implants a hold-down screw 12 respectively, remove guidance system 4.
Step 8) treat that the far-end locking of intramedullary pin 1 completes, remove guidance system 4.Connect by intramedullary pin 1 near-end the kirschner pin hole 7 that plane is arranged and insert two parallel Kirschner wires, while the maintenance reduction of the fracture, combined steel plate 2 is passed through the joint face accurate combination of above-mentioned Kirschner wire and intramedullary pin 1.Utilize screwdriver to be combined with attachment screw 3, twist in the connecting screw hole 5 as steel plate 2 and intramedullary pin 1 are arranged by attachment screw 3, steel plate 2 to be combined extracts Kirschner wire out after fixing with intramedullary pin 1 is stable.
Step 9) maintain humeral head reduction of the fracture state, protection sleeve is screwed in the fixing threaded hole 6 of combined steel plate surrounding, in sleeve, inserts drill bit with a scale and careful boring, until reach the plane of head of humerus subchondral bone.After boring completes, the screw length needed for reading from drill bit with a scale, removes drill bit and sleeve, being combined by screwdriver, being fixed in humerus by hold-down screw 12 by penetrating combined steel plate 2 with hold-down screw 12.
In order to maintain the replacement and fixation of proximal humeral fracture fragment, for inserting the Ge Ding road of steel wire or screw all with 5 ° ~ 10 ° angles of gathering to this greater tubercles of humerus portion.The angle of the hold-down screw making to squeeze into corresponding fracture site all Cheng Juxiang steel plate, to obtain a radial screw permutation and combination haply.Screw becomes this angle to fix with steel plate, add resistance to vertical withdrawal force.
In addition, the fixing stability of fracture site can be improved by the mode implanting suture.One or more nonabsorable tailor-tacking line is inserted the tendon attachment region of supraspinatus, infraspinatus and subscapularis, use the suture hole on combined steel plate 2 to be connected on combined steel plate 2 by suture, and use x-ray inspection to judge final fixed effect.For the duct that stitching thread or steel wire pass through, its diameter is between 0.8mm-1.2mm.The present invention can select the different intramedullary pin of length according to different classification of fracture, and with the combined steel plate of different fracture fixation screw.And the intramedullary pin of different model and combined steel plate link together and have identical coupling specification.Meanwhile, flat head screw can be used to be fixed, allow muscular tissue and stndon sheath from ailhead friction.Can arrange corresponding depressed part at the edge of combined steel plate near each installing hole place, each depressed part provides correct location to through its cerclage steel wire or suture, causes the risk of wearing and tearing to reduce each cerclage steel wire or suture because of friction.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. for inserting an intramedullary pin for target bone, it is characterized in that, this intramedullary pin is roughly " 7 " font bending shape, and by slightly gradually carefully distally extending; The near-end of described intramedullary pin has the plane chimeric with combined steel plate, and proximal face is preset with duct, for penetrating Kirschner wire, and screw or fixing stitching thread; Be corrugated arcuate structure between the near-end of described intramedullary pin and far-end, and be provided with some multidirectional locking screws, intramedullary pin and key sclerotin closely can be fixed after squeezing into corresponding screw.
2. the intramedullary pin for inserting target bone according to claim 1, it is characterized in that, chimeric plane between the near-end of described intramedullary pin and combined steel plate is provided with the groove structure and connecting screw hole that are fitted and fixed with, for intramedullary pin and combined steel plate being fixedly secured by Kirschner wire and attachment screw.
3. according to claim 2 or the described intramedullary pin for inserting target bone, it is characterized in that, chimeric plane between the near-end of described intramedullary pin and combined steel plate is oval, and this intramedullary pin has the screw that on upper and lower two connecting screw holes and combined steel plate, central area is provided with to match.
4., according to claim 1 or the described intramedullary pin for inserting target bone, it is characterized in that, the middle part of described intramedullary pin have at least one place lock screw be have a kind of female thread or around wedge-shaped groove structure.
5. according to claim 1 or the described intramedullary pin for inserting target bone, it is characterized in that described intramedullary pin proximal end plane there are at least two transversely arranged place's kirschner pin holes, for penetrating Kirschner wire fixation sclerite after the reduction of the fracture.
6. according to claim 1 or the described intramedullary pin for inserting target bone, it is characterized in that, described intramedullary pin bending part has at least one place or two places locking screw to be diagonal fixing threaded hole, for fixing humeral head sclerite by squeezing into lock screw.
7., according to claim 6 or the described intramedullary pin for inserting target bone, it is characterized in that, the locking screw of described intramedullary pin bending part have female thread or around wedge-shaped groove structure, fix to squeeze into lock screw.
8. the intramedullary pin for inserting target bone according to claim 4 or 7, is characterized in that, described female thread or around the pitch of wedge-shaped slot between 0.6mm-1.2mm.
9. based on the special guidance system of the intramedullary pin for inserting target bone according to claim 1, it is characterized in that, this special guidance system is used for auxiliary intra medullary nail and docks with fixing with the accurate of combined steel plate, guides simultaneously and screw is squeezed into correct fixed-direction; It comprises intramedullary pin-steel plate holder, and top and combined steel plate are fitted, and other arm distance skeleton pulp cavitys be arranged in parallel; Top and arm there is several pilot hole, for matching with the locking screw of intramedullary pin connecting screw hole and far-end respectively.
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| CN105105841A (en) * | 2015-07-20 | 2015-12-02 | 南方医科大学 | Preparation method for navigation template for guiding implantation of internal fracture fixation steel plate |
| CN106344141A (en) * | 2016-10-20 | 2017-01-25 | 陈华 | Two-way fixing steel plate and diaphysis fixing system |
| CN107789098A (en) * | 2016-09-05 | 2018-03-13 | 财团法人金属工业研究发展中心 | Femur support device |
| WO2018072181A1 (en) * | 2016-10-20 | 2018-04-26 | 陈华 | Two-way fixing steel plate and bone fixing system |
| CN110916795A (en) * | 2019-12-30 | 2020-03-27 | 中国人民解放军总医院 | Bone nail imbedding device |
| CN112890941A (en) * | 2021-04-01 | 2021-06-04 | 王嘉颐 | Quick-resetting internal fixing system for proximal humerus fracture |
| CN115969497A (en) * | 2022-12-30 | 2023-04-18 | 中国人民解放军总医院 | Internal fixation system for bone fracture |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105105841A (en) * | 2015-07-20 | 2015-12-02 | 南方医科大学 | Preparation method for navigation template for guiding implantation of internal fracture fixation steel plate |
| CN107789098A (en) * | 2016-09-05 | 2018-03-13 | 财团法人金属工业研究发展中心 | Femur support device |
| CN106344141A (en) * | 2016-10-20 | 2017-01-25 | 陈华 | Two-way fixing steel plate and diaphysis fixing system |
| WO2018072181A1 (en) * | 2016-10-20 | 2018-04-26 | 陈华 | Two-way fixing steel plate and bone fixing system |
| CN106344141B (en) * | 2016-10-20 | 2024-01-12 | 中国人民解放军总医院 | Two-way fixed steel plate and backbone fixing system |
| CN110916795A (en) * | 2019-12-30 | 2020-03-27 | 中国人民解放军总医院 | Bone nail imbedding device |
| CN112890941A (en) * | 2021-04-01 | 2021-06-04 | 王嘉颐 | Quick-resetting internal fixing system for proximal humerus fracture |
| CN115969497A (en) * | 2022-12-30 | 2023-04-18 | 中国人民解放军总医院 | Internal fixation system for bone fracture |
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| CN104771221B (en) | 2017-10-17 |
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