CN218165353U - Reinforcing structure for vertebral plate screw - Google Patents

Abstract

The utility model discloses a vertebral plate screw reinforces and consolidates structure, including the movable screw, the movable screw includes pin fin and central screw, has the screw hole on the pin fin, and the central screw passes the screw hole, and the overhead top of screw hole of nail has the threaded connection hole, and the threaded connection hole both sides have titanium stick card and go into groove, characterized by: the lower end of the nail head is provided with a clamping end, the cross section of the clamping end is in an equilateral polygon shape, the clamping end is sleeved with a fixing plate, the fixing plate is provided with a sleeve hole matched with the clamping end, the sleeve hole is in a polygon shape matched with the cross section of the clamping end, the fixing plate is provided with a connecting hole, and a fastening screw penetrates through the connecting hole. The reinforcement structure can strengthen the firmness of the vertebral plate screw connection part and has the adjustment capability to place the titanium rod into a proper position.

Description

Reinforcing structure for vertebral plate screw

Technical Field

The utility model relates to an internal fixation instrument for orthopedic surgery, in particular to a reinforced structure for dentata vertebral plate screws. The utility model also relates to an adjusting method of the fixing plate matched with the vertebral plate screw.

Background

The vertebral plate screw is for the spinal column cervical vertebra operation in the screw internal fixation mode that the dentata is commonly used, and the screw is put into and is fixed on the vertebral plate of dentata in the operation, is applicable to some patients such as the tiny or vertebral artery height span of dentata isthmus, and its security is higher for traditional pedicle of vertebral arch screw, has avoided the damage to vertebral artery, and improvement postoperative can look down directly to put the nail and also reduced the neural damage of spinal cord in the canalis spinalis simultaneously. But biomechanics experiments prove that the dentata vertebral plate screw has weak stability and pull-out resistance compared with a standard pedicle screw, has poor bearing capacity, can directly cause reduction of the fixing effect of the cervical vertebra rear nail rod structure, and influences the operation effect. And when the rod is fixed with the pedicle screws or the vertebral plate screws of the adjacent segments, the rod is difficult to be fixed due to the mismatch of spatial positions, and the multi-segment fixation cannot be realized. If improve the fixed strength of vertebral plate screw in the operation, can adjust its spatial position simultaneously and be convenient for go up the stick, will guarantee to go up the internal fixation effect that the cervical vertebra put the nail, patient's recovery is accelerateed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a vertebral plate screw reinforces and reinforces structure is provided, and the fastness of vertebral plate screw junction can be reinforceed to this reinforcement structure, and possesses the adjustment ability in order to put into suitable position with the titanium stick. The technical problem to be solved by the present invention is to provide an adjusting method of the fixing plate for vertebral plate screw.

Therefore, the utility model provides a vertebral plate screw reinforces and consolidates structure, including the movable screw, the movable screw includes pin fin and central screw, has the screw hole on the pin fin, and the central screw passes the screw hole, and overhead, the top of screw hole of nail have the threaded connection hole, and threaded connection hole both sides have titanium stick card and go into the groove, the pin fin lower extreme has the card end, and the cross-section of card end is equilateral polygon, the card end cup joints the fixed plate, has on the fixed plate with the card overlaps the trepanning that matches of end, and the trepanning shape is the multilateral shape that matches with the card end cross-section of going into, the fixed plate disposes the connecting hole, and fastening screw passes the connecting hole.

Preferably, the clamping end and the trepanning are polygons with more than 8 equilateral sides.

Preferably, the clamping end and the trepan boring are polygons with 10 equal sides.

Preferably, the clamping end and the trepan boring are polygons with 8 equal sides.

Preferably, the trepanning and the connecting hole on the fixing plate are arranged in the groove, the trepanning is arranged at one end of the fixing plate, and the connecting hole is located at the other end of the fixing plate.

Preferably, the connecting holes in the fixing plate are elongated holes, and the elongated holes are arranged along the length direction of the fixing plate.

Preferably, the two ends of the fixing plate are provided with connecting holes, the connecting holes at the two ends are provided with fastening screws, the middle of the fixing plate is provided with a long-strip-shaped positioning hole, the positioning hole is positioned in the upper groove and the lower groove, the movable screw is arranged at the positioning hole, the central screw is provided with a square nut, the side face of the square nut is clamped between the lower grooves, the clamping end of the pin head is in a polygon with even number of sides, the two symmetrical sides of the clamping end are clamped in the upper groove, and the central screw penetrates through the pin head and the fixing plate to be in threaded connection with the square nut to realize locking.

Preferably, the clamping end is 6-edge, 8-edge, 10-edge or 12-edge.

The technical effects of the utility model are as follows:

1) The movable screw comprises a movable screw, a fixed plate and a fastening screw, wherein the movable screw comprises a screw head and a central screw, a polygonal clamping end at the lower end of the screw head can be clamped into a corresponding shape trepanning at one end of the fixed plate, the other end of the fixed plate is fixed at the side position of a spine skeleton by the fastening screw, and the position of the skeleton with better strength can be selected, so that the movable screw can be strengthened, particularly, the polygonal clamping end at the lower end of the screw head is clamped into the corresponding shape trepanning at one end of the fixed plate, the fixed plate can limit the rotation of the screw head, and the strengthening and fixing effect can be further improved.

2) The utility model discloses in still providing the structure that fastening screw fixed plate was all adopted at both ends, through set up long banding locating hole at the fixed plate middle part, adopt square nut card in the low groove of locating hole department downside, go into the upper groove with the polygonal card income end card that has even number limit of pin fin, after square nut and central screw tighten up, just firmly fixed the position of pin fin, because of the fixed plate both ends have been at the rigidity of relative high strength, can promote by a wide margin and strengthen the effect, and the movable screw can also be on long banding locating hole round trip movement with the adjusting position, can also promote the flexibility of titanium stick position adjustment.

Drawings

Fig. 1 is a schematic structural view of a movable screw according to embodiment 1 of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a cross-sectional view of the snap-in end of fig. 1.

Fig. 4 is a schematic structural view of the movable screw of fig. 1 mounted on the fixing plate.

Fig. 5 is a schematic structural view of a vertebral plate screw reinforcement structure according to embodiment 1 of the present invention.

Fig. 6 is a schematic structural plan view of a fixing plate according to embodiment 1 of the present invention.

Fig. 7 is a schematic structural plan view of a fixing plate according to embodiment 2 of the present invention.

Fig. 8 is a schematic structural view of a vertebral plate screw reinforcing structure according to embodiment 3 of the present invention.

Fig. 9 is a schematic plan view of a bottom structure of the fixing plate of embodiment 3 of the present invention after the square nut and the movable screw are installed thereon, wherein the square nut is shown being clamped into the lower groove.

Fig. 10 is a schematic plan view of the fixing plate of fig. 9, wherein the card-in end is clipped in the upper groove.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front", "back", "left", "right", "upper" and "lower" refer to directions in the drawings, and the terms "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1-6, a vertebral plate screw reinforcement structure provided in embodiment 1 of the present invention includes a movable screw 1, the movable screw 1 includes a pin head 11 and a central screw 12, the pin head 11 has a screw hole, the central screw 12 passes through the screw hole, the pin head 11 has a threaded connection hole above the screw hole, two sides of the threaded connection hole have a titanium rod snap-in slot 14, the lower end of the pin head 11 has a snap-in end 15, the cross section of the snap-in end 15 is an equilateral polygon, the snap-in end 15 is sleeved with a fixing plate 2, the fixing plate 2 has a trepanning 21 matching the snap-in end 15, the trepanning 21 is a polygon matching the cross section of the snap-in end 15, the fixing plate 2 is configured with a connection hole 23, and the fastening screw 3 passes through the connection hole 23; trepanning 21 and connecting hole 23 on the fixed plate 2 set up in recess 24, connecting hole 23 on the fixed plate 2 is the round hole, and a plurality of round holes set up along fixed plate 2 length direction, have configured 3 round holes in this embodiment, trepanning 21 sets up in the one end of fixed plate, connecting hole 23 is in the other end of fixed plate.

Referring to fig. 1 and 6, the card-entering end and the trepanning are polygons with more than 8 equilateral sides. In specific application, the clamping end 15 and the trepanning 21 are polygons with 10 equal sides, or the clamping end 15 and the trepanning 21 are polygons with 8 equal sides, and the polygonal clamping end 15 and the trepanning 21 which are clamped with each other can limit rotation mutually.

The utility model also provides an adjustment method of the supporting fixed plate of above-mentioned vertebral plate screw, will fixed plate 2 cup joints with its trepanning 21 the card is gone into end 15, trepanning 21 and card are gone into 15 adaptations of end and restriction flat turn, bend off with the fingers and thumb fixed plate 2 is with the adaptation the shape on vertebra surface.

Referring to fig. 7, embodiment 2 of the present invention is substantially the same as the embodiment, and the difference is only that the shape of the connection hole 23 is different, in this embodiment, the trepanning 21 and the connection hole 23 on the fixing plate 2 are disposed in the groove 24, the connection hole on the fixing plate is a strip hole, the strip hole is disposed along the length direction of the fixing plate, and the position of the fastening screw can be adjusted more flexibly due to the structure of the strip hole.

Referring to fig. 8 to 10, embodiment 3 of the present invention is substantially the same as embodiment 1, except that: in this embodiment, the two ends of the fixing plate 2 are both provided with connecting holes 23, the connecting holes 23 at the two ends are both provided with fastening screws 3, the middle of the fixing plate 2 is provided with a strip-shaped positioning hole 25, the positioning hole 25 is located in an upper groove 26 and a lower groove 27, the positioning hole 25 is provided with the movable screw 1, the central screw 12 is provided with a square nut 16, the side surface of the square nut 16 is clamped between the lower grooves 27, the clamped end 15 of the nail head 11 is a polygon with even number of sides, two symmetrical sides of the clamped end 15 are clamped in the upper groove 27, and the central screw 12 passes through the nail head 11 and the fixing plate 2 to be in threaded connection with the square nut 16 to realize locking; the card-in end 15 has 6 sides, 8 sides, 10 sides or 12 sides.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the fan belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. The utility model provides a vertebral plate screw reinforces and reinforces structure, includes movable screw (1), and movable screw (1) includes pin fin (11) and central screw (12), has the screw hole on pin fin (11), and central screw (12) pass the screw hole, and pin fin (11) are gone up, and the top of screw hole has the threaded connection hole, and threaded connection hole both sides have titanium stick card to go into groove (14), characterized by: the lower end of the nail head (11) is provided with a clamping end (15), the cross section of the clamping end (15) is in an equilateral polygon shape, the clamping end (15) is sleeved with a fixing plate (2), the fixing plate (2) is provided with a sleeve hole (21) matched with the clamping end (15), the sleeve hole (21) is in a polygon shape matched with the cross section of the clamping end (15), the fixing plate (2) is provided with a connecting hole (23), and a fastening screw (3) penetrates through the connecting hole (23).

2. The lamina screw reinforcing structure of claim 1, wherein: the clamping end (15) and the trepanning (21) are polygons with more than 8 equal sides.

3. The lamina screw reinforcing structure of claim 2, wherein: the clamping end and the trepanning (21) are 10 equilateral polygons.

4. The lamina screw reinforcing structure of claim 2, wherein: the clamping end and the trepanning (21) are in a polygon shape with 8 equilateral sides.

5. The lamina screw reinforcing structure of claim 1, wherein: trepanning (21) and connecting hole (23) on fixed plate (2) set up in recess (24), trepanning (21) set up in the one end of fixed plate, connecting hole (23) are in the other end of fixed plate.

6. The lamina screw reinforcing structure of claim 1, 2, 3, 4 or 5, wherein: the connecting holes (23) in the fixing plate (2) are long holes which are arranged along the length direction of the fixing plate (2).

7. The lamina screw reinforcing structure of claim 1, 2, 3, 4 or 5, wherein: the novel fixing plate is characterized in that connecting holes (23) are formed in two ends of the fixing plate (2), fastening screws (3) are arranged in the connecting holes (23) in the two ends, a long-strip-shaped positioning hole (25) is formed in the middle of the fixing plate (2), the positioning hole (25) is located in an upper groove (26) and a lower groove (27), the movable screw (1) is arranged at the positioning hole (25), a square nut (16) is arranged at a central screw (12), the side face of the square nut (16) is clamped between the lower grooves (27), a clamping end (15) of the nail head (11) is in a polygon with even number of sides, two symmetrical sides of the clamping end (15) are clamped in the upper groove (26), and the central screw (12) penetrates through the nail head (11) and the fixing plate (2) to be in threaded connection with the square nut (16) to achieve locking.

8. The lamina screw reinforcing and strengthening structure of claim 7, wherein: the clamping end (15) is 6-edge, 8-edge, 10-edge or 12-edge.

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