CN202086567U - Bone nail and tool for using same - Google Patents

Abstract

The utility model discloses a bone nail and a tool for using the same. The bone nail comprises a rod-shaped body with a head part and a tail part, wherein the end of the tail part is provided with a tool inserting hole, and at least one bulge axially extending is arranged on the side face of the rod-shaped body. After the bone nail is driven in a bone by using a special tool, the bulge can restrict the rotation and the retreated movement of the bone nail, so that the bone nail is firmly fixed on the bone.

Description

A kind of nail and use the instrument of this nail

Technical field

This utility model relates to surgical operating instrument, relates to a kind of nail particularly and uses the instrument of this nail.

Background technology

Nail is a skeletal fixation device commonly used in the bone surgery.Existing nail, the similar of major part and normal screws nail, it comprises a screw rod and a spiral head, is provided with screw thread on the screw rod outer surface, the spiral head end is provided with the groove for the rotation of instruments such as screwdriver.Yet, existing nail, after implantation, the phenomenon that easy generation gets loose from skeleton, the patient will implant again like this, brings misery.

The utility model content

The purpose of this utility model is to provide a kind of novel nail, to solve the above-mentioned problems in the prior art.Bone nail structure in this utility model is reasonable in design, can prevent to get loose.

The technical scheme that this utility model provides is as follows:

A kind of nail comprises a shaft-like body, and this shaft-like body has a head and an afterbody, and described tail end is provided with tool receptacle, it is characterized in that: this shaft-like body side is provided with at least one and axially goes up the projection of extending.

In a preferred embodiment of the present utility model, described projection is twice, is located at symmetrically on the body afterbody side.

In a preferred embodiment of the present utility model, described projection comprises a plurality of barb-shaped pointed tooths of arranging in turn.

In a preferred embodiment of the present utility model, each pointed tooth is a barb-shaped, comprises an end face, two sides and an inclined plane, and this end face and axis normal or angle are less than 90 degree, or each face all is the barb-shaped pointed tooth of curved surface.

In a preferred embodiment of the present utility model, the end of each pointed tooth is formed lines that extended to caudal directions by head, and described lines are straight line or waveform or arc or parabola.

In a preferred embodiment of the present utility model, described pointed tooth becomes big by head gradually to tail dimension.Being provided with like this is beneficial in the pointed tooth insertion skeleton.

In a preferred embodiment of the present utility model, described protruding distributing position is a tail end to the position from the 1/3-1/10 body length of distance tail end.

In a preferred embodiment of the present utility model, described tool receptacle is yi word pattern or cross or star or polygon groove, or is screwed hole.

In a preferred embodiment of the present utility model, described screw axes upwards is provided with through hole.

In of the present utility model one better embodiment, the afterbody end of described through hole is provided with female thread.

A kind of nail instrument, comprise a stock instrument and a sleeve barrel tool, described stock instrument comprises that a bar portion and is used to rotate the rotating part of this bar portion, and the bar portion end of wherein said stock instrument is provided with the shape that cooperates with the tool receptacle of nail tail end; Described sleeve barrel tool comprises a sleeve and a lateral projection portion, and described stock instrument can insert in the sleeve barrel tool.

By foregoing description as can be known, this utility model provides a kind of nail, and this shaft-like body side is provided with at least one and axially goes up the projection of extending, hammer into skeleton by special-purpose nail instrument after, this projection can limit the rotation of nail; This projection is that a plurality of pointed tooths of arranging in turn form, and the end face of pointed tooth and axis normal or angle are less than 90 degree, and pointed tooth plays agnail like this, prevents that nail from retreating, because this nail can not retreat and can not rotate, makes this nail firmly be fixed on the skeleton.

Because nail is little, need to adopt specific purpose tool just can operate.The nail tail end is provided with tool receptacle, and this tool receptacle is yi word pattern or cross or star or polygon groove.For adopting helicitic texture, nail is difficult for separating with instrument in operating process like this but more preferably.This nail instrument comprises a stock instrument and a sleeve barrel tool, and the stock instrument is used to connect nail, and sleeve barrel tool is convenient to hand-held or is used on orientation tools such as sight.

Description of drawings

Fig. 1 is the structural representation in the front of this utility model embodiment one nail;

Fig. 2 is the perspective view of this utility model embodiment one nail;

Fig. 3 is the plan structure sketch map of the nail of this utility model embodiment one;

Fig. 4 is the structural representation in the front of this utility model embodiment two nails;

Fig. 5 is the perspective view of this utility model embodiment two nails;

Fig. 6 is the plan structure sketch map of the nail of this utility model embodiment two;

Fig. 7 is the structural representation of sleeve barrel tool;

Fig. 8 is the structural representation of stock instrument;

Fig. 9 is the structural representation that sleeve barrel tool and stock instrument are used in combination.

The specific embodiment

Embodiment one nail

Embodiment one of the present utility model, referring to figs. 1 through Fig. 3,nail 100 comprises a shaft-like body, and the one end is ahead 110, and the other end is an afterbody 120.Nail 100 is preferably made by biocompatible materials.For example rustless steel, titanium, chromium or its alloy, and suitable ceramic material or macromolecule polymer material.The cross section of described shaft-like body is circular, yet, be not limited thereto, also can ellipse or star or polygon or other shape that helps inserting.Head 110 is taper, is arranged with the upwardly extending projection of twice axle on the side of afterbody 20.

This projection is that a plurality of trianglepointed tooths 121 are formed, and to 1/5 body length position distribution from the distance tail end, and the size of pointed tooth becomes greatly to afterbody gradually by head from tail end for it, and the upper surface of last pointed tooth of afterbody is the end of afterbody.The end of each pointed tooth formed one by head to the caudal directions lines a of offset axis gradually.In the present embodiment, these lines a is a straight line, and in other embodiments, these lines can be waveform or arc or parabola.Eachpointed tooth 121 comprises 1211, twosides 1213 of end face and an inclined plane 1212.Whereininclined plane 1212 is outward-dipping to caudal directions by cephalad direction, andend face 1211 and axis normal,, after hammering into skeleton,end face 1211 plays the agnail effect like this, can prevent that whole nail from withdrawing from skeleton.In the present embodiment,end face 1211 and axis normal, in other embodiments,end face 1211 also can acutangulate with body axis, and it also can be concave surface, has formed the agnail shape like this.

This shaft-like body is provided with throughhole 130 along axis direction, and it can be used for pouring into bone cement in osseous tissue, and the bone cement that is filled in the osseous tissue is fixing together with the bone cement of staying in the nail through hole, and the fastness of nail is improved; Or not pouring into bone cement, osseous tissue is grown in through hole, also can improve fastness.

Throughhole 130 is provided withfemale thread 140 by an end ofafterbody 120, and it is used for and instrument cooperates, and nail can be tufted in the skeleton, below also will describe in detail.And in common nail design, because bar portion is provided with external screw thread, its socket can not be designed to the screw thread mouth shape, otherwise nail easily unclamps from skeleton when throw breaks away from.

In other embodiments, through hole also can be designed to the tool receptacle of other shape by an end of afterbody 120.As the strip groove, cross groove, star, triangle, square, polygon etc.Yet the design of screw thread mouth is best, because of it helps nail and instrument strong bonded, difficult drop-off.

Embodiment two nails

Referring to Fig. 4 to Fig. 6, the structure of the nail of present embodiment and embodiment one is basic identical, and different is that in the present embodiment, projection has only one.

Embodiment three nails

The structure of the nail of present embodiment and embodiment one is basic identical, and different is that in the present embodiment, projection is three, and is equidistant evenly distributed on the outer peripheral face of shaft-like body.(not shown)

Embodiment four stock instruments

Referring to Fig. 8, thisstock instrument 200 comprises anelongated stem 210 and a head that is used to rotate 220, and wherein thisbar portion end 210 is provided with theexternal screw thread 211 with the screw-internal thread fit ofnail 100afterbodys.Head 220 is a gear shape, and outer peripheral edges are provided with serration, so that withhands dwang portion 210 easily.

In other embodiments,bar portion 210 ends also can be designed to other shape, for example with the strip groove of nail through-hole tail, and cross groove, star, triangle, square, the shape that shapes such as polygon are adaptive.

Embodiment five sleeve barrel tools

Referring to Fig. 7, this sleeve tool comprises abar portion 310 and ahead 320, wherein this bar portion is provided with an axial throughhole 311, the internal diameter of this throughhole 311 greater thanstock instrument 200 the external diameter ofbar portion 210, make thebar portion 210 ofstock instrument 200 can insert in this through hole 311.This head is one andbar portion 310vertical cross bars 320, andbar portion 310 promptly is installed on the bottom surface at thesecross bar 320 middle parts.The end face atcross bar 320 middle parts is provided with agroove 321, and the distance between the dual-side 3211 and 3212 ofgroove 321 is greater than the external diameter of thehead 220 ofstock instrument 200, and thehead 220 ofstock instrument 200 can be contained in this groove like this.Bottom portion of groove also is provided with one and throughhole 311 corresponding opening 322 ofbar portion 310.

During use,,earlier nail 100 is screwed inbar portion 210 ends ofstock instrument 200 referring to Fig. 9, then nail and stock instrument are all inserted in thebar portion 310 ofsleeve tool 300, after the skeleton location, by the mode ofbeaing nail 100 is hammered into skeleton, then 200 rotations of stock instrument are withdrawed from.Because the position-limiting action of the projection ofnail 100, nail can not be driven to rotate and become flexible in this process.

Above-mentioned only is specific embodiment of the utility model, but design concept of the present utility model is not limited thereto, and allly utilizes this design that this utility model is carried out the change of unsubstantiality, all should belong to the behavior of invading this utility model protection domain.

Claims (10)

1. a nail comprises a shaft-like body, and this shaft-like body has a head and an afterbody, and described tail end is provided with tool receptacle, it is characterized in that: this shaft-like body side is provided with at least one and axially goes up the projection of extending.

2. a kind of nail as claimed in claim 1 is characterized in that: described projection is twice, is located at symmetrically on the side of body afterbody.

3. a kind of nail as claimed in claim 1 is characterized in that: described protruding distributing position is a tail end to the position from the 1/3-1/10 body length of distance tail end.

4. a kind of nail as claimed in claim 1 or 2 is characterized in that: described projection comprises a plurality of barb-shaped pointed tooths of arranging in turn.

5. a kind of nail as claimed in claim 4 is characterized in that: the end of each pointed tooth is formed a curve that is extended to caudal directions by head, and described curve is straight line or waveform or arc or parabola.

6. a kind of nail as claimed in claim 4 is characterized in that: described pointed tooth becomes big by head gradually to tail dimension.

7. a kind of nail as claimed in claim 4 is characterized in that: each pointed tooth comprises an end face, two sides and an inclined plane, and this end face and axis normal or angle are less than 90 degree.

8. a kind of nail as claimed in claim 1 is characterized in that: described tool receptacle is yi word pattern or cross or star or polygon groove, or is screwed hole.

9. a kind of nail as claimed in claim 1 is characterized in that: described screw axes upwards is provided with through hole, and the afterbody end of described through hole is provided with female thread.

10. nail instrument, comprise a stock instrument and a sleeve barrel tool, described stock instrument comprises that a bar portion and is used to rotate the rotating part of this bar portion, is characterized in that: the bar portion end of described stock instrument is provided with the shape that cooperates with the tool receptacle of nail tail end; Described sleeve barrel tool comprises a sleeve, and described stock instrument can insert in the sleeve barrel tool.

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