CN209392073U - A kind of novel arch of posterior atlas fixing piece - Google Patents

Abstract

The utility model proposes a kind of novel arch of posterior atlas fixing pieces, it include: the fixed plate of strip and the cylindrical bar fixing piece for being connected and fixed stick, the stick fixing piece side wall is equipped with U-type groove, U-lag can in fixed plate 360 degree rotation, the stick fixing piece is connected to the both ends of the fixed plate, the lower section of the stick fixing piece U-lag is equipped with through-hole, and the internal screw thread for fixing screws is equipped in the through-hole.By being provided with the internal screw thread in the through-hole for fixing screws, to, in same level range, both realized that the novel arch of posterior atlas fixing piece was fixed with atlas, while top can also be fixed with hold-down bars, enhance the stability of the fixed position of hold-down bars, also space is adequately utilized, reduces integrally-built area occupied, reduces it in Supraatlantal range of exposure, far from vertebral artery, operation risk is reduced.

Description

A kind of novel arch of posterior atlas fixing piece

Technical field

The utility model relates to medical instruments fields, particularly relate to a kind of novel arch of posterior atlas fixing piece.

Background technique

It after atlantoaxial dislocation, is generally resetted using screw-rod system, nail-stick system includes being screwed into atlas and dentata Fixed screw, and the hold-down bars that normal dentata is connect with Supraatlantal screw of dislocating, control between two hold-down bars, then lead to It crosses other fixation devices to be attached, fixed device of such as horizontal company or arch of posterior atlas etc..Clinically when atlas is placed in pedicle of vertebral arch screw When nail or lateral mass screw technically or in dissection has difficulties, the fixed device of arch of posterior atlas can be used, reduce the difficulty of operation, But the fixed device of traditional arch of posterior atlas (with reference to the patent of the Patent No. CN205586063U applied before inventor), is adopted Transverse plate structure is relatively simple, and the surface for being tightly attached to arch of posterior atlas is fixed, directly to implant bed region, i.e., in the middle part of arch of posterior atlas Tuberculum posterius atlantis region cause and block, cause bone grafting that can not contact with implant bed, cannot achieve firm bone grafting fusion.This Afterwards, inventor has continued to improve to structure, improves bone grafting syncretizing effect, but the fixed dress of existing arch of posterior atlas at present It sets, the technological improvement including inventor before this (patent No.: 2017207253734), remains on that there are some defects, after atlas The bottom for bending the U-lag of fixed device is fixed without screw in vacant state, and the part connection for causing fixed plate fixed is not tight enough It is close, and atlas and axis is the maximum spinal segments of swing, U-lag be two independent knots for fixing the device of fixed plate Structure, therefore the fixed device of arch of posterior atlas is easy to appear loosening；Meanwhile in order to improve stability, the location hole of the fixed device of original Quantity is set as 4, but grip stick U-lag bottom without fixation hole, lead to the whole knot of the fixed device of arch of posterior atlas Structure is too long；Furthermore due to atlas reasons in structure, there is sulcus for vertebral artery above arch of posterior atlas, arch of posterior atlas fixture structure is too long The screw in positioning be will use close to vertebral artery, increase the risk of operation.

Utility model content

The utility model proposes a kind of novel arch of posterior atlas fixing pieces, reduce integrally-built volume and length, and mention High integrally-built stability, reduces the risk of operation.

The technical solution of the utility model is achieved in that

A kind of novel arch of posterior atlas fixing piece, comprising: a kind of novel arch of posterior atlas fixing piece characterized by comprising long The fixed plate of strip and cylindrical bar fixing piece for being connected and fixed stick, the stick fixing piece side wall are equipped with U-type groove, the stick Fixing piece is connected to the both ends of the fixed plate, and the lower section of the U-lag is equipped with through-hole, is equipped in the through-hole for fixing spiral shell The internal screw thread of nail.By being provided with the internal screw thread in the through-hole for fixing screws, thus, in same level range, Both it had realized that the novel arch of posterior atlas fixing piece was fixed with atlas, while top can also be fixed with hold-down bars, had enhanced The stability of the fixed position of hold-down bars, is also adequately utilized space, reduces integrally-built area occupied, make it in atlas On range of exposure reduce, far from vertebral artery, reduce operation risk.

Further, the fixed plate is equipped with radian upward in the horizontal direction, radian model of the radian in horizontal direction Enclose is 90 ° -120 °.The radian designs the physiological structure based on atlas, reaches and effectively evades and avoid the atlas as implant bed Posterior tubercle.

Further, it is equipped with sight vane in the middle part of the fixed plate, can be used for observing fixed and bone grafting.

Further, the fixed plate is equipped with location hole, and the location hole is set to the stick fixing piece and the sight vane Between, the location hole inner wall is equipped with locking screw thread, for fixing with screw fit.

Further, the vertical direction of the location hole and the fixed plate forms 5-10 ° of angle.Due to tuberculum posterius atlantis Anatomical structure reason and fixed plate center be equipped with the radian in horizontal direction, when fixed, when screw fixed-direction relative to Atlas inwardly, it is poly- downwards when, the screw way of formation is longer, to keep the fixation of screw stronger, at this point, then need to make it is described fixed The vertical direction of position hole and the fixed plate forms 5-10 ° of angle, specifically, the angle direction has relative to fixed plate Downwards, and to (on both sides of the middle that the location hole is located at the fixed plate) direction in the middle part of the fixed plate gather.

Further, the fixed plate is equipped with the bending away from the direction of the stick fixing piece, and the degree of the bending is 5- 15 °, the design of the bending is also based on the physiological structure of atlas, can effectively be bonded atlas structure, does not have to use other Tool temporarily carry out bending during operation.

Further, it is designed by above-mentioned improved structure, the entire length of the novel arch of posterior atlas fixing piece exists 30cm-50cm。

Further, the stick fixing piece is fastened in the fixed plate, and can set ring circle along card in the fixed plate Zhou Xuanzhuan.The stick fixing piece can rotate 360 degree of original positions in the fixed plate, since the U-lag bottom is equipped with through-hole, spiral shell Nail is fixed on atlas via the through-hole, reduces the length of the fixed device of arch of posterior atlas in this way, and stability is more preferable, meanwhile, by It is rotatable in the U-lag, no matter the position of dentata screw be partially in or it is partially outer, the company of stick can easily be fixed It connects.

The utility model compare with existing product structure design, at least have the advantage that

By using the through-hole and the internal screw thread being arranged, thus in a water in the bottom of the stick fixing piece Prosposition sets the fixation of the fixation and screw that realize hold-down bars, compared to structure design before, reduces the area occupied of product, Length is shorter, reduces it in Supraatlantal displaying area, farther away from vertebral artery, reduces the risk of operation.

Due to the U-lag position that stick is fixed, bottom also increases the fixation of screw, the U-lag fixed compared to stick before The lower section of the position separate design fixed without screw, the stability of the novel arch of posterior atlas fixing piece improve, and steel plate is more firm Gu.

In addition, by the connection between the stick fixing piece and the fixed plate, in such a way that card is set rather than one Body or the mode of welding, to provide the function that the U-type groove rotates in situ, no matter the position of dentata screw be partially in or It is partially outer, the connection of stick can easily be fixed.

The location hole form it is downward, inside gather angle, direction vertebral interspace is big, and screw way is longer, and screw is more Securely.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of planar structure schematic diagram of novel arch of posterior atlas fixing piece one embodiment of the utility model；

Fig. 2 is the cambered structure schematic diagram of novel arch of posterior atlas fixing piece shown in Fig. 1；

Fig. 3 is the bending structure schematic diagram of novel arch of posterior atlas fixing piece shown in Fig. 1.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

Such as Fig. 1-Fig. 3, a kind of novel arch of posterior atlas fixing piece, comprising: the fixed plate 1 of strip and for being connected and fixed stick Cylindrical bar fixing piece 2,2 side wall of stick fixing piece is equipped with U-type groove, and for across hold-down bars, stick fixing piece 2 is connected to fixed plate 1 both ends, stick fixing piece 2 are equipped with U-lag, and stick fixing piece 2 is fastened in fixed plate 1 (as shown in Figure 3), and can carry out 360 degree Rotation, the lower section of the U-lag of stick fixing piece 2 are equipped with through-hole 3, the internal screw thread for fixing screws are equipped in through-hole 3.By logical Internal screw thread is provided in hole 3 for fixing screws, thus, in same level range, both realized novel arch of posterior atlas fixing piece with Atlas is fixed, while top can also be fixed with hold-down bars, enhances the stability of the fixed position of hold-down bars, also sufficiently Space is utilized, reduce integrally-built area occupied, reduce it in Supraatlantal range of exposure, far from vertebral artery, drop Low operation risk.

Further, as shown in Fig. 2, fixed plate 1 is equipped with radian upward in the horizontal direction, radian of the radian in horizontal direction Range is 90 ° -120 °.The radian designs the physiological structure based on atlas, reaches and effectively evades and avoid the extensive region as implant bed Vertebra posterior tubercle.

Further, it is equipped with sight vane 4 in the middle part of fixed plate 1, can be used for observing fixed and bone grafting.

Further, fixed plate 1 is equipped with location hole 5, and location hole 5 is set between stick fixing piece 2 and sight vane, positioning hole Wall is equipped with locking screw, for locking with screw fit, prevents screw from voluntarily deviating from.

Further, the vertical direction of location hole 5 and fixed plate 1 forms 5-10 ° of angle.Due to the dissection of tuberculum posterius atlantis Reasons in structure and 1 center of fixed plate are equipped with the upward radian of horizontal direction, when fixed, when the fixed-direction of screw is relative to extensive region When vertebra is inside, poly- downwards, the screw way of formation is longer, to keep the fixation of screw stronger, at this point, then needing to make location hole 5 5-10 ° of angle is formed with the vertical direction of fixed plate 1, specifically, the angle direction relative to fixed plate 1, have downwards and Gather to 1 middle part (on both sides of the middle that location hole 5 is located at fixed plate 1) direction of fixed plate.

Further, as shown in figure 3, fixed plate 1 is equipped with the bending away from the direction of stick fixing piece 2, the degree of bending is 5- 15 °, the design of bending is also based on the physiological structure of atlas, can effectively be bonded atlas structure, does not have to using other works Tool temporarily carries out bending during operation.

Further, it is designed by above-mentioned improved structure, the entire length of novel arch of posterior atlas fixing piece is in 30cm- 50cm。

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (8)

1. a kind of novel arch of posterior atlas fixing piece characterized by comprising the fixed plate of strip and for being connected and fixed stick Cylindrical bar fixing piece, the stick fixing piece side wall are equipped with U-type groove, and the stick fixing piece is connected to the both ends of the fixed plate, The lower section of the U-type groove is equipped with through-hole, and the internal screw thread for fixing screws is equipped in the through-hole.

2. novel arch of posterior atlas fixing piece as described in the appended claim 1, it is characterised in that: the fixed plate is equipped in the horizontal direction Upward radian, arc range of the radian in horizontal direction are 90 ° -120 °.

3. novel arch of posterior atlas fixing piece as described in the appended claim 1, it is characterised in that: be equipped with perspective in the middle part of the fixed plate Hole.

4. novel arch of posterior atlas fixing piece as claimed in claim 3, it is characterised in that: the fixed plate is equipped with location hole, The location hole is set between the stick fixing piece and the sight vane.

5. novel arch of posterior atlas fixing piece as claimed in claim 4, it is characterised in that: the location hole and the fixed plate Vertical direction forms 5-10 ° of angle.

6. novel arch of posterior atlas fixing piece as described in the appended claim 1, it is characterised in that: the fixed plate, which is equipped with, deviates from the stick The bending in the direction of fixing piece, the degree of the bending are 5-15 °.

7. novel arch of posterior atlas fixing piece as described in the appended claim 1, it is characterised in that: the length of the fixed plate be 30~ 50cm。

8. novel arch of posterior atlas fixing piece as described in the appended claim 1, it is characterised in that: the stick fixing piece is fastened on described solid On fixed board, and ring circle rotation can be set along card in the fixed plate.