CN208031274U - Fixed jaw and bone anchoring device - Google Patents

Abstract

The utility model is related to a kind of fixed jaw, it is used in the bone anchoring device with fixed jaw connecting rod, the fixed jaw (11) includes：Curved portion (112) has the first end (1120) and the second end opposite with the first end (1121) of the fixed jaw connecting rod for being connected to the bone anchoring device；Nosed (111) is connected with the second end (1121) of the curved portion (112)；Wherein using the geometric center for being held section of bone to be fixed (90) as origin (O), the fixed jaw (11) is more than 180 ° to the angle that the origin (O) opens.Since with nosed, the utility model fixed jaw is easy to be placed into fixed bit；It, can stronger clamping bone (90) to be fixed since entire fixed jaw is major arc.

Description

Fixed jaw and bone anchoring device

Technical field

The utility model is related to fixed jaw and its bone anchoring device is used, especially a kind of be used in is fixed temporarily long bone bone The fixed jaw and its bone anchoring device of folding.

Background technology

In medical practice, grasping and reset to bone are generally required using bone anchoring device, the prior art CN2708856Y、CN2848149Y、CN201586055U、CN202078380U、 CN203089326U、CN203122608U、 CN203183006U, CN203677346U, CN203777030U, CN204446061U, CN204581507U individually disclose by The various bone anchoring devices of fixed claw assembly and movable claw assembly and screw drive composition.Although area in other respects Not, above-mentioned fixed jaw in the prior art is minor arc, that is, using the geometric center of bone to be fixed as the center of circle, these fixed jaws Central angle is less than 180 °.

It is the attached drawing of CN203777030U with reference to figure 1.When using the bone anchoring device wherein instructed, allow first solid Determine pawl 2 and catches on bone (not shown) to be fixed above it from below.At this point, bone to be fixed and its adhering tissue such as muscle, fat And skin etc. is sandwiched between fixed jaw 2 and movable claw 1.Then, by rotating regulation handle 8, movable claw 1 is made to advance downwardly And withstand bone to be fixed.Similar with other prior arts, fixed jaw in CN 203777030U is single arc-shaped, and Its central angle is only slightly larger than 90 °, can catch on bone to be fixed in the left side of Fig. 1 and downside both direction.

The above-mentioned fixed jaw of the prior art, although having the advantages that simple in structure, manufacture is easy, its own folder to bone It is limited to hold ability.If making up clamping using larger movable claw (such as movable claw 1 in increase CN 203777030U) Ability can be to adhering tissue outside bone such as muscle, fat and skin etc. then during movable claw movement clamps bone to be fixed Cause larger wound.Therefore, there is guarantee folder for the bone anchoring device for using it in the fixed jaw design of the prior art It holds ability and reduces the double-barreled question of wound.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of fixed jaw in bone anchoring device, it can It provides reliably to the holding capability of bone.

In order to achieve the above objectives, the utility model provides a kind of fixed jaw, and it is solid to be used in the bone with fixed jaw connecting rod Determine in device, the fixed jaw includes：Curved portion has the fixed jaw connecting rod for being connected to the bone anchoring device First end, and the second end opposite with the first end；Nosed is connected with the second end of the curved portion；Wherein Using the geometric center for being held section of bone to be fixed as origin O, the fixed jaw is more than the origin O angles opened 180°。

The fixed jaw of the utility model has the following advantages that：It is due to nosed, contributing to that fixed jaw merging is solid Positioning；Since entire fixed jaw is major arc, the clamping to three directions of bon e formation to be fixed, therefore its own can be provided Good fixing.

The utility model also provides a kind of bone anchoring device using above-mentioned fixed jaw comprising above-mentioned fixed jaw, and Arcuate movement pawl, the movable claw are 30 ° to 70 ° to the angle that the origin O opens.Since the size of movable claw is smaller, this Utility model bone anchoring device is smaller to the damage organized outside bone.

Description of the drawings

The utility model may be better understood in refer to the attached drawing and specification.Component in attached drawing is painted not necessarily to scale System, purpose, which is only that, illustrates the principles of the present invention.In the accompanying drawings：

Fig. 1 is the attached drawing of prior art bone anchoring device；

Fig. 2 is the fixed jaw according to one embodiment of the utility model；

Fig. 3 is according to the bone anchoring device of one embodiment of the utility model, including fixed jaw associated component and activity Pawl associated component.

Specific implementation mode

Following explanation is related to the fixed jaw of one embodiment according to the present utility model.As shown in Fig. 2, the fixation Pawl 11 includes：Curved portion 112 has the fixed jaw connecting rod for being connected to the bone anchoring device (in figure 3 with reference numeral 13 show) first end 1120, and the second end 1121 opposite with the first end；Nosed 111, with the arc The second end 1121 in portion 112 is connected；Wherein using the geometric center for being held section of bone 90 to be fixed as origin O, the fixation Pawl 11 is more than 180 ° to the angle that the origin O opens, that is, forms major arc.

Fixed jaw in above-described embodiment, due to nosed, contributing to fixed jaw 11 being placed in fixed bit；By It is major arc in entire fixed jaw 11, forms the folder of three directions (left and right sides and upside of Fig. 2) to the bone 90 to be fixed It holds, therefore its own can provide good fixing.

Preferably, the curved portion 112 is 140 ° to 160 ° to the angle that the origin O opens.Curved portion 112 as a result, Bone 90 to be fixed is withstood from the right side of Fig. 2 and upside.

Preferably, the nosed 111 is 40 ° to 60 ° to the angle that the origin O opens.As a result, inexcessive In the case of increased in size, nosed 111 can withstand bone 90 to be fixed on the left of Fig. 2.

Preferably, the angle of wedge of the nosed 111 is 5 ° to 15 °, and nosed 111 is made to be easily built into folder Hold position.

Preferably, when bone 90 to be fixed is femur, the first end 1120 of the curved portion 112 arrives the nosed The distance of 111 medial surface is 22-35mm.This size can form femur effective clamping.

Preferably, the medial surface of the nosed 111 has miniature protrusion, the outside mask of the nosed 111 There is band portion 113.Miniature protrusion is arranged on medial surface can help nosed more firmly to hold out against bone 90 to be fixed.On the outside Band portion 113 is arranged on face to help to detach periosteum, muscle stop when nosed 111 is placed in.

Preferably, considering for mechanical strength and manufacturing cost, the curved portion 112 and the nosed 111 are Integral structure.

With reference to figure 3, the bone anchoring device according to the utility model one embodiment is shown comprising in above-described embodiment Fixed jaw 11 and arcuate movement pawl 21, the angle that the movable claw 21 opens the origin O be 30 ° to 70 °.Due to The size of movable claw is smaller, and bone anchoring device according to the present utility model is smaller to the damage organized outside bone.

According to the bone anchoring device of above-described embodiment, using upper convenience, while good fixing effect is provided, to bone outside The damage of tissue is smaller.

Although having disclosed the various exemplary embodiments of the utility model, those skilled in the art will manage Solution, without departing from the spirit and scope of the utility model, can make will realize the certain of the utility model The various changes of advantage and improvement.Those skilled in the art obviously understand, can suitably substitute execution identical function Other component.It should be noted that can combine with the feature of other accompanying drawings with reference to the feature specifically illustrated, even if In the case of being not expressly mentioned.

Claims (8)

1. a kind of fixed jaw is used in the bone anchoring device with fixed jaw connecting rod, which is characterized in that the fixed jaw (11) Including：

Curved portion (112) has the first end (1120) for the fixed jaw connecting rod for being connected to the bone anchoring device, with And the second end (1121) opposite with the first end；

Nosed (111) is connected with the second end (1121) of the curved portion (112)；

Wherein using the geometric center for being held section of bone to be fixed (90) as origin (O), the fixed jaw (11) is to the original The angle that point (O) opens is more than 180 °.

2. fixed jaw according to claim 1, wherein

The curved portion (112) is 140 ° to 160 ° to the angle that the origin (O) opens.

3. fixed jaw according to claim 2, wherein

The nosed (111) is 40 ° to 60 ° to the angle that the origin (O) opens.

4. fixed jaw according to claim 1, wherein

The angle of wedge of the nosed (111) is 5 ° to 15 °.

5. fixed jaw according to claim 1, wherein

The distance of medial surface of the first end of the curved portion (112) to the nosed (111) is 22-35mm.

6. fixed jaw according to claim 1, wherein

There is the medial surface of the nosed (111) miniature protrusion, the lateral surface of the nosed (111) to have band portion (113)。

7. fixed jaw according to claim 1, wherein

The curved portion (112) and the nosed (111) are structure as a whole.

8. a kind of bone anchoring device, it is characterised in that

Include the fixed jaw according to any in claim 1-7, and

Arcuate movement pawl, the movable claw are 30 ° to 70 ° to the angle that the origin (O) opens.