Tibia is inverted intramedullary pinTechnical field
The application relates to a kind of orthopedic medical device, particularly relates to a kind of tibia and is inverted intramedullary pin.
Background technology
It is generally used for distal tibial fracture, fracture of calcaneus, by surgery operating technology, damage location is recovered.
It is exactly osteopathy that tibia is inverted intramedullary pin, is also the new technique of a kind of modern fracture fixation, and it usesIndirectly reduction of the fracture technology, and fix with pulp cavity implant and maintain fracture reduction so that operation is sudden and violentDew and soft tissue are peeled off and are minimized, it is possible to increase union of fracture rate.
Tradition tibia is inverted intramedullary pin structure complexity, and operation inconvenience, intramedullary pin tensile strength is low.
In view of this, it is necessary to provide a kind of novel tibia to be inverted intramedullary pin.
Summary of the invention
It is an object of the invention to provide a kind of tibia and be inverted intramedullary pin, with existing distal tibial, calcaneus boneThe deficiency of folding methods of internal fixation.
For achieving the above object, the present invention provides following technical scheme:
The open a kind of tibia of the embodiment of the present application is inverted intramedullary pin, including the far-end rivet nut being coaxially disposed with nearEnd rivet nut, the diameter of described far-end rivet nut is more than described near-end rivet nut, and described far-end rivet nut offers theOne fixing hole, the second fixing hole and the 3rd fixing hole, described first fixing hole, the second fixing hole and the 3rdFixing hole sets gradually to near-end rivet nut direction from far-end rivet nut, described first fixing hole and the second fixing holeBeing perpendicular to intramedullary pin axis direction, described first fixing hole becomes 85 ° of angles with intramedullary pin axis direction, describedSecond fixing hole is perpendicular to intramedullary pin axis direction, and described second fixing hole is vertical with the first fixing hole, instituteState the 3rd fixing hole and become 55 ° of angles with intramedullary pin axis direction.
Preferably, in above-mentioned tibia is inverted intramedullary pin, the end of described far-end rivet nut offers a wordNotch.
Preferably, in above-mentioned tibia is inverted intramedullary pin, described intramedullary pin axially offers two ends along itThe cavity communicated.
Preferably, in above-mentioned tibia is inverted intramedullary pin, the head tapering of described near-end rivet nut.
Preferably, in above-mentioned tibia is inverted intramedullary pin, described near-end rivet nut offers near its endLong lumbar hole, this long lumbar hole is perpendicular to intramedullary pin axis direction.
Preferably, in above-mentioned tibia is inverted intramedullary pin, described intramedullary pin material is titanium alloy material.
Compared with prior art, it is an advantage of the current invention that: the tibia of this novel offer is inverted intramedullary pin knotStructure is simple, safety is high, is suitable for clinical demand, and intramedullary pin tensile strength is high, can be used for tibia, calcaneusFusion, can realize operative incision little, purpose fast and easily of performing the operation.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to realityExecute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,Accompanying drawing in description is only some embodiments described in the application, for those of ordinary skill in the artFrom the point of view of, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 show tibia in the specific embodiment of the invention and is inverted the perspective view of intramedullary pin.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried outDetailed description, it is clear that described embodiment is only a part of embodiment of the present invention rather than completeThe embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creationProperty work on the premise of the every other embodiment that obtained, broadly fall into the scope of protection of the invention.
Shown in Fig. 1, tibia is inverted intramedullary pin, follows closely including the far-end rivet nut 1 being coaxially disposed and near-endBody 2, the diameter of far-end rivet nut 1 be more than near-end rivet nut 2, far-end rivet nut 1 offers the first fixing hole 11,Second fixing hole 12 and the 3rd fixing hole 13, first fixing hole the 11, second fixing hole 12 and the 3rd is fixedHole 13 sets gradually from far-end rivet nut 1 to near-end rivet nut 2 direction, and the first fixing hole 11 and second is fixedHole 12 is perpendicular to intramedullary pin axis direction, and the first fixing hole 11 becomes 85 ° of angles with intramedullary pin axis direction,Second fixing hole 12 is perpendicular to intramedullary pin axis direction, and the second fixing hole 12 is vertical with the first fixing hole 11,3rd fixing hole 13 becomes 55 ° of angles with intramedullary pin axis direction.
In this technical scheme, first fixing hole the 11, second fixing hole 12 and the 3rd fixing hole 13 are with fixingNail 3 cooperation, the first fixing hole becomes 5 ° of angles with intramedullary pin normal direction, and it is for calcaneus, cuboid and intramedullary pinFixing；Second fixing hole and intramedullary pin axially vertical and with the first fixing hole axial deflection 90 °, for calcaneusLaterally secure with intramedullary pin；3rd fixing hole and the axial angulation of intramedullary pin 55 °, for calcaneus, astragalus and marrowFixing of interior nail.
The end of far-end rivet nut 1 offers flat recess mouth 14.
In this technical scheme, far-end flat recess mouth 14 is for the positioning and directing of intramedullary pin.
Intramedullary pin axially offers the cavity 4 that two ends communicate along it.
In this technical scheme, intramedullary pin entirety through hole, can pass through again bone while alleviating intramedullary pin weightPin guides and squeezes in skeleton.
The head tapering 21 of near-end rivet nut 2.
In this technical scheme, proximal head tapering, it is simple to intramedullary pin squeezes into skeleton along guide pin direction.
Near-end rivet nut 2 offers long lumbar hole 22 near its end, and this long lumbar hole 22 is perpendicular to intramedullary pin axisDirection.
In this technical scheme, near-end has long lumbar hole, for dynamically locking or the static locking of near-end.
Preferably, intramedullary pin entirety material is titanium alloy material.
This case intramedullary pin is designed for tibia calcaneus fusion, performs the operation safer convenient.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely toOne entity or operation are separated with another entity or operating space, and not necessarily requires or implyRelation or the order of any this reality is there is between these entities or operation.And, term " includes ", " bagContain " or its any other variant be intended to comprising of nonexcludability, so that include a series of key elementProcess, method, article or equipment not only include those key elements, but also include being not expressly set outOther key elements, or also include the key element intrinsic for this process, method, article or equipment.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that at bagInclude and the process of described key element, method, article or equipment there is also other identical element.
The above is only the detailed description of the invention of the application, it is noted that general for the artFor logical technical staff, on the premise of without departing from the application principle, it is also possible to make some improvement and profitDecorations, these improvements and modifications also should be regarded as the protection domain of the application.