阅读说明：本技术 一种用于脊柱矫形手术的椎体撑开器械和辅助器械组件 (Vertebral body opening instrument and auxiliary instrument assembly for spinal column orthopedic surgery ) 是由 梁益建 白云生 高国强 张惠仲 刘甜甜 于 2020-06-15 设计创作，主要内容包括：本发明公开了一种用于脊柱矫形手术的椎体撑开器械和辅助器械组件,其中,辅助器械组件包括椎体撑开器械和临时锁定定位器械,在进行脊柱矫形手术时可利用椎体撑开器械将相邻椎体临时撑开到目标位置,然后,利用临时锁定定位器械将相邻椎体临时锁定到目标位置,从而方便对患者的肋骨进行支撑矫形操作,提高了手术成功率。(The invention discloses a vertebral body stretching instrument and an auxiliary instrument assembly for spinal orthopedic surgery, wherein the auxiliary instrument assembly comprises a vertebral body stretching instrument and a temporary locking and positioning instrument, when the spinal orthopedic surgery is carried out, the adjacent vertebral bodies can be stretched to target positions temporarily by using the vertebral body stretching instrument, and then the adjacent vertebral bodies are locked to the target positions temporarily by using the temporary locking and positioning instrument, so that the supporting and orthopedic operation on ribs of a patient is facilitated, and the success rate of the surgery is improved.)

1. A vertebral body distracting instrument for spinal orthopedic surgery, comprising: a left spreading seat (4), a left spreading piece (2), a right spreading seat (7), a right spreading piece (1) and a pressurizing screw (6), wherein the periphery of the pressurizing screw (6) is provided with external threads, one end of the pressurizing screw (6) is provided with a fixture block flange (9), the left spreading seat (4) and the right spreading seat (7) are arranged side by side, one end of the left spreading seat (4) is provided with a step hole, the other end of the left spreading seat is hinged with the left spreading piece (2), the pressurizing screw (6) is in running fit with the step hole through the fixture block flange (9), the pressurizing screw (6) is in axial limit with the left spreading seat (4) through the axial clamping effect of the fixture block flange (9) and the step hole, one end of the right spreading seat (7) is in threaded fit with the pressurizing screw (6), and the other end of the right spreading piece (1) is hinged, the tail end of the left spreading piece (2) and the tail end of the right spreading piece (1) are both provided with clamping grooves (10) used for slidably clamping the spine connecting rod (12).

2. The vertebral body distracting device according to claim 1, wherein the articulation axis between the left distraction piece (2) and the left distraction seat (4) and the articulation axis of the right distraction piece (1) and the right distraction seat (7) are axial screws (3), the axis of the axial screws (3) being arranged parallel to the axis of the compression screw (6).

3. The vertebral body distraction device according to claim 1, wherein the other end of the compression screw (6) opposite to the cartridge flange (9) is provided with a knob (8).

4. The vertebral body distracting device according to claim 1, wherein the thickness of the left distracting piece (2) in the axial direction of its articulated shaft is a left distracting piece thickness which gradually decreases in the direction from its articulated shaft to the clamping groove (10), and the thickness of the right distracting piece (1) in the axial direction of its articulated shaft is a right distracting piece thickness which gradually decreases in the direction from its articulated shaft to the clamping groove (10).

5. The vertebral body distracting device according to claim 1, wherein the slot (10) is a U-shaped slot.

6. An auxiliary instrument assembly for spinal orthopedic surgery, characterized by comprising a temporary locking positioning instrument and a vertebral body distracting instrument according to any one of claims 1 to 5, the temporary locking positioning instrument comprising a body member (18), a compression screw plug (14) and a pressing rod (15), the body member (18) having a hollow cylindrical structure, the body member (18) comprising a screw plug connecting portion (16) and a clamping portion (17) for clamping the spinal connecting rod (12), the screw plug connecting portion (16) being provided with an internal thread (20) for screwing with the compression screw plug (14), the clamping portion (17) being connected below the screw plug connecting portion (16), the clamping portion (17) comprising two oppositely arranged clamping clasps (26), each clamping clasping member (26) having an upper end integrally connected to the screw plug connecting portion (16) and being capable of elastically swinging relative to the screw plug connecting portion (16), one opposite side of the two clamping and holding pieces (26) is provided with an inwards concave arc-shaped clamping surface (19), the upper end of the clamping and holding piece (26) is provided with a press rod socket (22), the two press rod sockets (22) are communicated with the hollow cavity of the body piece (18) and form a passage for the press rod (15) to penetrate through, the extension direction of the passage is intersected with the longitudinal separation surface (23) between the two clamping and holding pieces (26), the press rod (15) penetrates through the passage, two ends of the press rod (15) are respectively positioned at the upper ends of the two clamping and holding pieces (26), a central rod (25) is coaxially fixed at the lower end of the compression screw plug (14), a central riveting hole (21) which is rotatably matched with the central rod (25) is formed in the upper side of the compression rod (15), the diameter of the central riveting hole (21) is smaller than the diameter of the compression screw plug (14).

7. Auxiliary instrument assembly according to claim 6, characterized in that the upper and lower side surfaces of the press bar (15) are both planar.

8. The auxiliary instrument assembly according to claim 6, characterized in that the central rod (25) and the compression screw (14) are of a one-piece construction.

9. Auxiliary instrument assembly according to claim 6, characterized in that the central rivet hole (21) extends through the upper and lower sides of the press bar (15).

10. The auxiliary instrument assembly of claim 6 wherein the outer peripheral surface of the body member (18) is cylindrical.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a vertebral body stretching instrument and an auxiliary instrument assembly for spinal orthopedic surgery.

Background

By intervertebral space is meant the space between two adjacent vertebral bodies, where the intervertebral disc is located. Severe scoliosis of the spine often has symptoms of spinal stenosis, which can be accompanied by problems with herniated discs. The gap between the vertebral bodies is widened, the normal vertebral body arrangement is restored, and the ligament tension is relaxed, so that the compression and stimulation to the spinal cord and the spinal nerve root are reduced.

When spine correction is performed on a patient with moderate and severe scoliosis, vertebral pedicle screws are needed to fix all vertebral bodies, and the stabilization of the vertebral bodies of the spine is realized. For patients with rib deformities, the doctor needs to reshape the patient's rib support before tightening the pedicle screws to reconstruct a normal thorax. At this time, the pedicle screws which are implanted into vertebral bodies and are not fastened are easy to slide on the spinal connecting rod for dislocation, so that the spinal orthopedic surgery fails.

In order to synthesize the above-mentioned surgical purposes, the spine orthopedist needs an auxiliary surgical instrument assembly which can firstly prop the adjacent vertebral bodies to an ideal position, can temporarily lock the propped vertebral bodies on the spine connecting rod, and can position the pedicle screws so that the pedicle screws cannot be displaced. After the doctor finishes supporting the ribs and fastens the pedicle screws, the temporary locking and positioning instrument can be detached from the spinal connecting rod.

Therefore, how to facilitate rib support correction before tightening pedicle screws is a technical problem that those skilled in the art need to solve at present.

Disclosure of Invention

In view of the above, the present invention is directed to a vertebral body distraction instrument and an auxiliary instrument assembly for spinal orthopedic surgery, which can be used to temporarily distract adjacent vertebral bodies to a target position during spinal orthopedic surgery, so as to facilitate the correction of the rib support of a patient.

In order to achieve the purpose, the invention provides the following technical scheme:

a vertebral body distraction instrument for spinal orthopedic surgery, comprising: a left side struts seat, a left side and struts piece, the right side and strut seat, the right side and strut piece, pressure screw, wherein, pressure screw's periphery is equipped with the external screw thread and pressure screw's one end is equipped with the fixture block flange, a left side strut the seat with the right side struts the seat and arranges side by side, the one end that struts the seat on a left side is equipped with step hole and the other end articulates it has a left side strut piece, pressure screw passes through the fixture block flange with step hole normal running fit, and pressure screw passes through the fixture block flange with the axial joint effect in step hole realize with the axial of a left side strut the seat is spacing, the right side strut the seat one end with pressure screw thread fit and the other end articulates there is the right side strut piece, the end of a left side strut the piece with the end of a right side strut piece all is equipped with the draw-in groove that is used for slip centre gripping backbone.

The using method of the vertebral body distraction instrument comprises the steps of clamping the clamping grooves of the left distraction piece and the right distraction piece between two adjacent vertebral pedicle screws of the vertebral column connecting rod, then, rotating the pressurizing screw rod to enable the right distraction piece to be far away from the left distraction piece along the vertebral column connecting rod, so that two adjacent vertebral bodies are distracted to a target position through the two distraction pieces, at the moment, the vertebral body distraction instrument is fixed by other external forces, the supporting orthopedic operation of ribs can be conveniently carried out, and the success rate of the operation is improved.

Preferably, the hinge shaft between the left spreading piece and the left spreading seat and the hinge shaft between the right spreading piece and the right spreading seat are axial screws, and the axes of the axial screws are arranged in parallel with the axis of the pressurizing screw rod.

Preferably, the other end of the pressurizing screw rod opposite to the fixture block flange is provided with a knob.

Preferably, the left spreader piece is left spreader piece thickness along the axial thickness of its articulated shaft, left spreader piece thickness reduces gradually in the direction by its articulated shaft to its draw-in groove, the right spreader piece is right spreader piece thickness along the axial thickness of its articulated shaft, right spreader piece thickness reduces gradually in the direction by its articulated shaft to its draw-in groove.

Preferably, the clamping groove is a U-shaped clamping groove.

The invention also provides an auxiliary instrument assembly for spinal orthopedic surgery, which comprises a temporary locking and positioning instrument and the vertebral body expanding instrument, wherein the temporary locking and positioning instrument comprises a body part, a compression screw plug and a pressing rod, the body part of the body part is of a hollow cylindrical structure, the body part comprises a screw plug connecting part and a clamping part for clamping the vertebral column connecting rod, the screw plug connecting part is provided with an internal thread for being in threaded connection with the compression screw plug, the clamping part is connected below the screw plug connecting part, the clamping part comprises two clamping and holding parts which are oppositely arranged, the upper end of each clamping and holding part is uniformly connected with the screw plug connecting part and can elastically swing relative to the screw plug connecting part, one opposite side of the two clamping and holding parts is provided with an inwards concave arc-shaped clamping surface, and the upper end of each clamping and holding part is provided with a pressing rod socket, the two pressing rod inserting openings are communicated with the hollow cavity of the body piece and form a passage for the pressing rod to penetrate through, the extending direction of the passage and the longitudinal separation surface between the two clamping and embracing pieces are arranged in an intersecting mode, the pressing rod penetrates through the passage, the two ends of the pressing rod are respectively located at the upper ends of the two clamping and embracing pieces, the lower end of the pressing plug screw is coaxially fixed with a center rod, the upper side of the pressing rod is provided with a center riveting hole which is used for being in running fit with the center rod, and the aperture of the center riveting hole is smaller than the diameter of the pressing plug screw.

The use method of the auxiliary instrument assembly comprises the following steps of firstly, utilizing the vertebral body unfolding instrument to unfold the vertebral body of a patient to an ideal position, then clamping the temporary locking and positioning instrument on the spinal connecting rod, enabling the body piece to abut against one side of a vertebral pedicle screw to be positioned as required, screwing the compression screw plug, pressing the compression rod downwards when screwing the compression screw plug, utilizing the compression rod to oppress and order two clamping and embracing pieces to be close to each other, further enabling the clamping part at the lower part of the body piece to be firmly clamped on the spinal connecting rod, namely finishing the temporary locking of the vertebral body at a target position, at the moment, conveniently carrying out the supporting and shape correcting operation of the rib, and further improving the success rate of the operation. After the operation is finished, the compression screw plug is unscrewed, so that the clamping part loosens the clamping of the spinal connecting rod, and the temporary locking and positioning instrument is detached.

Preferably, both the upper and lower side surfaces of the press bar are planar.

Preferably, the central rod and the compression screw plug are of an integrated structure.

Preferably, the central rivet hole penetrates through the upper side and the lower side of the press rod.

Preferably, the outer peripheral surface of the body member is a cylindrical surface.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall construction of a vertebral body distracting device in an embodiment of the present invention;

FIG. 2 is a longitudinal cross-sectional view of a vertebral body distraction instrument in an embodiment of the invention;

FIG. 3 is a schematic structural view of a left spreader seat and a left spreader plate according to an embodiment of the present invention;

FIG. 4 is another perspective view of the left distraction seat and the left distraction sheet in an embodiment of the invention;

FIG. 5 is a schematic structural view of a right spreader base and a right spreader plate in an embodiment of the present invention;

FIG. 6 is a schematic view of a construction of a pressurizing screw according to an embodiment of the present invention;

FIG. 7 is a schematic view of the vertebral body distracting device in accordance with an embodiment of the present invention in use;

FIG. 8 is a schematic view of the left and right distraction pieces distracting the pedicle screws in an embodiment of the invention;

FIG. 9 is a schematic illustration of a temporary locking positioning instrument in accordance with an exemplary embodiment of the present invention;

FIG. 10 is a schematic illustration from another perspective of a temporary locking positioning instrument in accordance with an exemplary embodiment of the present invention;

FIG. 11 is a front elevational view of the construction of the body member in accordance with an embodiment of the present invention;

FIG. 12 is a schematic view of a press bar according to an embodiment of the present invention;

FIG. 13 is a schematic view of a compression plug according to an embodiment of the present invention;

FIG. 14 is a longitudinal cross-sectional view of a body member in an embodiment of the present invention;

FIG. 15 is a schematic illustration of a temporary locking positioning instrument in use, in accordance with an embodiment of the present invention.

The meaning of each reference numeral in fig. 1 to 15 is as follows:

1-right distraction piece, 2-left distraction piece, 3-axial screw, 4-left distraction seat, 5-plug, 6-pressurizing screw, 7-right distraction seat, 8-knob, 9-fixture block flange, 10-clamp groove, 11-threaded hole, 12-spine connecting rod, 13-pedicle screw, 14-pressing plug screw, 15-pressing rod, 16-plug screw connecting part, 17-clamping part, 18-body part, 19-arc clamping surface, 20-internal thread, 21-center riveting hole, 22-pressing rod socket, 23-longitudinal separation surface, 24-plug screw groove, 25-center rod, 26-clamping part and 27-axial platform.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, in order to facilitate the rib supporting and reshaping of a patient, the present invention provides a vertebral body expanding instrument for spinal orthopedic surgery, comprising: a left side props open the seat 4, a left side props open the piece 2, a right side props open the seat 7, a right side props open the piece 1, the pressure screw 6, wherein, the periphery of pressure screw 6 is equipped with the external screw thread and the one end of pressure screw 6 is equipped with fixture block flange 9, a left side props open seat 4 and a right side props open the seat 7 and arranges side by side, the one end that the seat 4 was propped open to a left side is equipped with the step hole and the other end articulates there is left side props open piece 2, pressure screw 6 passes through fixture block flange 9 and step hole normal running fit, and pressure screw 6 realizes the axial spacing with left side props open the seat 4 through the axial joint effect of fixture block flange 9 and step hole, the one end of right side props open the seat 7 and the pressure screw 6 screw thread fit and the other end articulates there is right side props open the piece 1, the end of left side props open the piece 2 and the end of right side props open the piece 1 and all is equipped with the draw-in groove 10 that is used for And (7) connecting the device.

Specifically, the screw plug 5 can be assembled in the stepped hole of the left-hand opening seat 4 to limit the fixture block flange 9 of the pressurizing screw rod 6 to be disengaged from the stepped hole, that is, the axial limiting function of the fixture block flange 9 is realized, and of course, the scheme can also assemble end covers or fixture blocks and other plugging pieces in the stepped hole of the left-hand opening seat 4 to realize the axial limiting function of the fixture block flange 9.

The distal end (be used for articulated one end of propping open piece 2 on a left side) of propping open seat 4 on a left side is equipped with axle position platform 27, axle position platform 27 is for strutting the step face that seat 4 axial tilt arranged on a left side relatively, axle position platform 27 can not hinder the home range of propping open seat 4 on a left side, and when strutting piece 2 on a left side and rotating to the biggest angle along the slope step face of anticlockwise direction axle position platform 27 in fig. 3, prop open seat 4 on a left side and prop open piece 2 on a left side and fold and lean on, be convenient for accomodate. The distal end of the right spreader base 7 is also provided with a shaft platform 27, which has a structure similar to that of the left spreader base 4 and will not be described in detail herein. In addition, the proximal end of the right spreader bar 7 (i.e., the end for connecting the compression screw 6) is provided with a threaded hole 11 that is engaged with the external thread of the compression screw 6. The right opening seat 7 is arranged corresponding to the left opening seat 4, and the right opening sheet 1 and the left opening sheet 2 are symmetrically arranged.

Preferably, the articulated shaft between the left distraction piece 2 and the left distraction seat 4 and the articulated shaft between the right distraction piece 1 and the right distraction seat 7 are axial screws 3, and the axial lines of the axial screws 3 are arranged in parallel with the axial line of the pressurizing screw 6. As shown in fig. 1, when the temporary distraction of the vertebral body is not needed, the left distraction piece 2 and the right distraction piece 1 are both rotated to the position far away from the spinal connecting rod 12, when the vertebral body is required to be distracted, the left distraction piece 2 and the right distraction piece 1 are rotated relative to the left distraction seat 4 and the right distraction seat 7 respectively around the axial screw 3, and are rotated to the position of the spinal connecting rod 12, then, the clamping grooves 10 at the tail ends of the two distraction pieces are clamped on the spinal connecting rod 12, in the process, the rotation directions of the two distraction pieces are consistent, the rotation angle and the clamping angle are consistent, so that the two distraction pieces can be well clamped on the spinal connecting rod 12, and the operation is convenient.

Preferably, the other end of the pressurizing screw 6 opposite to the fixture flange 9 is provided with a knob 8 for facilitating the manual rotation operation of the doctor, thereby facilitating the rotation of the pressurizing screw 6.

It should be noted that, one end of the pressure screw 6, which is provided with the fixture block flange 9, is placed into the step hole of the left spreader seat 4, the fixture block flange 9 can freely rotate around the axis of the pressure screw 6 in the step hole, but cannot move along the axial direction of the pressure screw 6, the right spreader seat 7 is assembled on the rod body of the pressure screw 6 through the threaded hole 11, by using the thread fit relationship between the threaded hole 11 and the pressure screw 6, when the left spreader 2 and the right spreader 1 are both clamped on the spinal connecting rod 12, a doctor rotates the pressure screw 6 relative to the two spreader seats by screwing the knob 8 at the end of the pressure screw 6, because the two spreader plates are both clamped on the spinal connecting rod 12, the two spreader seats cannot rotate, and during the rotation of the pressure screw 6, the right spreader plate 1 can be correspondingly driven to approach or separate from the left spreader plate 2, so as to realize the limiting effect on the pedicle screw 13, thereby realizing the purpose of opening the adjacent vertebral bodies of the patient by the doctor in the operation.

It should be noted that, left strutting piece 2 and right strutting piece 1 in this scheme can design into straight plate column structure, the platelike structure of buckling, multiple forms such as shaft-like structure, preferably, left strutting piece 2 and right strutting piece 1 in this scheme all have the design of buckling to form an obtuse angle contained angle in the department of buckling, the lateral wall of left strutting piece 2 and right strutting piece 1 has the mild transition face from the near-end (with strutting the articulated one end of seat promptly) to the distal end (be equipped with the one end of draw-in groove 10 promptly) design, thereby make the wall thickness that the mild transition face distal end in both sides formed minimum. The wall thickness between the gentle transition face of above-mentioned both sides is exactly every and struts the piece along the axial thickness of its articulated shaft, and is concrete, and left side struts piece 2 and is left strut piece thickness along the axial thickness of its articulated shaft, and left side strut piece thickness reduces gradually in the direction by its articulated shaft to its draw-in groove 10, and right side strut piece 1 is right strut piece thickness along the axial thickness of its articulated shaft, and right side strut piece thickness reduces gradually in the direction by its articulated shaft to its draw-in groove 10. By the design, the tail end of each distraction piece can not obstruct the view of a doctor, and the far end parts of the left distraction piece 2 and the right distraction piece 1 can be more easily clamped against one side of the U-shaped connector of the pedicle screw 13.

It should be noted that the clamping grooves 10 at the ends of the left spreading piece 2 and the right spreading piece 1 can be designed into various structural shapes such as a U-shaped clamping groove, a rectangular clamping groove, a semicircular clamping groove, and a V-shaped clamping groove, and preferably, the clamping grooves 10 in this scheme are U-shaped clamping grooves.

The using method of the vertebral body distraction instrument comprises the steps of clamping the clamping grooves 10 of the left distraction piece 2 and the right distraction piece 1 between two adjacent vertebral pedicle screws 13 of the spinal connecting rod 12, then, rotating the pressurizing screw rod 6 to enable the right distraction piece 1 to be far away from the left distraction piece 2 along the spinal connecting rod, thereby enabling two adjacent vertebral bodies to be distracted to a target position through the two distraction pieces, at the moment, fixing the vertebral body distraction instrument with the help of other external forces, conveniently carrying out the support orthopedic operation of ribs, and improving the success rate of the operation.

The invention also provides an auxiliary instrument assembly for spinal orthopedic surgery, which comprises a temporary locking and positioning instrument and a vertebral body expanding instrument as described above, wherein the temporary locking and positioning instrument comprises a body member 18, a pressing screw plug 14 and a pressing rod 15, the body member 18 is of a hollow cylindrical structure, the body member 18 comprises a screw plug connecting part 16 and a clamping part 17 for clamping the vertebral column connecting rod 12, the screw plug connecting part 16 is provided with an internal thread 20 for screwing with the pressing screw plug 14, the clamping part 17 is connected below the screw plug connecting part 16, the clamping part 17 comprises two clamping and holding members 26 which are oppositely arranged, the upper end of each clamping and holding member 26 is uniformly connected with the screw plug connecting part 16 and can elastically swing relative to the screw plug connecting part 16, one opposite side of each clamping and holding member 26 is provided with a concave arc-shaped clamping surface 19, the upper end of each clamping and holding member 26 is provided with a pressing and inserting hole 22, the two pressing and inserting holes 22 are communicated with the hollow cavity of the body member 18 and form a passage for the pressing rod 15, the extending direction of the passage and the longitudinal separating surface 23 between the two clamping and embracing pieces 26 are arranged in an intersecting manner, the pressing rod 15 penetrates through the passage, the two ends of the pressing rod 15 are respectively positioned at the upper ends of the two clamping and embracing pieces 26 (namely the two ends of the pressing rod 15 are respectively positioned above the lower side edges of the two pressing rod inserting openings 22), the lower end of the pressing plug 14 is coaxially fixed with a central rod 25, the upper side of the pressing rod 15 is provided with a central riveting hole 21 which is used for being in running fit with the central rod 25, the aperture of the central riveting hole 21 is smaller than the diameter of the pressing plug 14, and the lower end surface of the pressing plug 14 can be clamped at the upper end of the central riveting hole 21. The pressing plug 14 is connected with the pressing rod 15 in a reverse riveting mode, and when the pressing plug 14 is screwed into the plug connecting part 16 of the body member 18, the pressing rod 15 is pushed downwards by the lower end face of the pressing plug 14.

Wherein, the central rod 25 is fixed at the center of the bottom of the pressing plug screw 14, the central rod 25 and the pressing plug screw 14 are preferably of an integrated structure, and when the pressing plug screw 14 is rotated, the central rod 25 rotates along with the pressing plug screw 14 and lifts along with the lifting of the pressing plug screw 14 in the plug screw connecting part 16. The main body top end of the compression screw plug 14 is provided with a polygonal screw plug groove 24 for cooperating with a screw plug wrench to screw the compression screw plug 14.

It should be noted that, as shown in fig. 11, the longitudinal separation plane 23 between the two clasps 26 is an imaginary plane which can be used as a symmetry plane of the through hole 20 of the plug screw connecting portion 16, the arc-shaped clamping surfaces 19 of the two clasps 26 are oppositely arranged on both sides of the longitudinal separation plane 23, the upper end of each clasps 26 is integrally connected to the plug screw connecting portion 16 and can elastically swing with respect to the plug screw connecting portion 16, that is, the connecting portion between the clasps 26 and the plug screw connecting portion 16 is elastically deformable, and the connecting portion between the clasps 26 and the plug screw connecting portion 16 is closer to the longitudinal separation plane 23 than the position where the pressing rod 15 acts on the clasps 26, so that when the pressing rod 15 in the passage presses the upper ends of the two clasps 26 downward, the pressing rod 15 presses the acting position of the clasps 26 and the connecting portion between the clasps 26 and the plug screw connecting portion 16 to form a moment arm, the downward pressure effect applied by the pressing rod 15 to the clamping and holding part 26 forms a rotating moment to the clamping and holding part 26 by taking the connecting part of the clamping and holding part 26 and the screw plug connecting part 16 as the center, therefore, in the descending process of the pressing rod 15, the lower ends of the two clamping and holding parts 26 approach to the middle by taking the upper end connecting part as the center, in the approaching process, the clamping space formed by the two arc-shaped clamping surfaces 19 is smaller and smaller, so that enough clamping force can be formed for the spinal connecting rod 12, and the temporary locking positioning instrument is locked on the spinal connecting rod 12.

In addition, the extending direction of the passage intersects with the longitudinal separation plane 23 between the two clasps 26, which ensures that the two ends of the press rod 15 can apply a rotation moment to the clasps 26, and further, the extending direction of the passage is preferably designed to be perpendicular to the longitudinal separation plane 23.

Preferably, both the upper side surface and the lower side surface of the press bar 15 are flat. When the planar structure is pressed on the upper end of the clamping piece 16, more stable contact can be ensured, and the pressing rod 15 is prevented from shaking back and forth.

Preferably, the central rivet hole 21 extends through both upper and lower sides of the press bar 15.

Preferably, the outer peripheral surface of body member 18 is cylindrical, as shown in FIGS. 9 and 10. With such an arrangement, the exposed sharp corner of the body member 18 can be further reduced, so that the overall structure is smoother and easier to process. The temporary locking and positioning instrument is in an assembled state when leaving a factory, and a doctor only needs to place the temporary locking and positioning instrument at a specific position of an operation and fasten the compression screw plug 14 when using the temporary locking and positioning instrument.

The using method of the auxiliary instrument assembly comprises the steps of firstly, utilizing a vertebral body unfolding instrument to unfold a vertebral body of a patient to an ideal position, then clamping the temporary locking and positioning instrument on the spinal column connecting rod 12, enabling the body part 18 to abut against one side of a U-shaped connector of the pedicle screw 13 to be positioned, screwing the compression screw plug 14, pressing the compression rod 15 downwards when screwing the compression screw plug 14, utilizing the compression rod 15 to press and drive the two clamping and holding parts 26 to be close to each other, and firmly clamping the clamping part 17 at the lower part of the body part 18 on the spinal column connecting rod 12, wherein at the moment, the unlocked pedicle screw 13 cannot move on the spinal column connecting rod 12, namely, the vertebral body is temporarily locked at a target position. At the moment, the supporting and orthopedic operation of the ribs can be conveniently carried out, thereby improving the success rate of the operation. After the operation is finished, the compression screw plug 14 is unscrewed, the clamping part 17 is released from clamping the spinal connecting rod 12, and the temporary locking positioning instrument is detached.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.