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CN-121971152-A - Pedicle screw for spinal surgery

CN121971152ACN 121971152 ACN121971152 ACN 121971152ACN-121971152-A

Abstract

The invention relates to the technical field of orthopedic surgery, in particular to a pedicle screw for spinal surgery, which comprises a screw body, wherein a screw tail is rotatably arranged at the upper end of the screw body, an inner screw seat is inserted between the screw tail and the screw body, the inner screw seat is rotated in the screw tail to adjust the connection relation between the angle of the screw tail and the screw body, a screw seat jack is longitudinally penetrated through the center of the upper end of the screw tail, a limiting swivel is arranged at the lower end of the screw tail, a limiting swivel groove is arranged at the upper end of the screw body, the screw tail is limited and slides in the limiting swivel groove through the limiting swivel, a lower insertion hole is arranged at the center of the screw body, the lower insertion hole is communicated with the screw seat insertion hole, a plurality of limiting convex grooves are uniformly arranged in the lower insertion hole, and lower clamping grooves are arranged at the bottom ends of the limiting convex grooves.

Inventors

  • GUO JIDONG
  • LIU LINGYING
  • ZENG XIANGCHAO
  • WANG DAWEI
  • YANG YAFENG
  • WANG HUADONG

Assignees

  • 中国人民解放军总医院第四医学中心

Dates

Publication Date
20260505
Application Date
20260121

Claims (10)

  1. 1. The pedicle screw for spinal surgery is characterized by comprising a screw body (2), wherein the upper end of the screw body (2) is rotatably provided with a screw tail (1), an inner screw seat (3) is inserted between the screw tail (1) and the screw body (2), and the inner screw seat (3) is rotated in the screw tail (1) to adjust the angle of the screw tail (1) and the connection relation between the screw body (2).
  2. 2. The pedicle screw for spinal surgery according to claim 1, wherein the center of the upper end of the screw tail (1) is longitudinally provided with a screw seat jack (4) in a penetrating manner, the lower end of the screw tail (1) is provided with a limiting rotary ring (5), the upper end of the screw body (2) is provided with a limiting rotary groove (7), and the screw tail (1) is limited and slides in the limiting rotary groove (7) through the limiting rotary ring (5).
  3. 3. The pedicle screw for spinal surgery according to claim 2, wherein the center of the screw body (2) is provided with a lower jack (6), the lower jack (6) is communicated with the screw seat jack (4), a plurality of limiting convex grooves are uniformly arranged in the lower jack (6), and lower clamping grooves are formed in the bottom ends of the limiting convex grooves.
  4. 4. The pedicle screw for spinal surgery according to claim 3, wherein the inner screw seat (3) comprises an outer male shaft (8), the outer male shaft (8) is inserted into the lower insertion hole (6) in a limiting manner through the screw seat insertion hole (4), the outer male shaft (8) is rotatably provided with a combined adjusting shaft (9), the combined adjusting shaft (9) is engaged with the transmission angle locking male seat (11) through a gear, and the combined adjusting shaft (9) is connected with the lower clamping seat (12) through a threaded fit.
  5. 5. The pedicle screw for spinal surgery according to claim 4, wherein the upper and lower sides of the outer wall of the male shaft (8) are uniformly provided with a plurality of boss extending grooves (13) and holding-down slots (14), and the upper ends of the combined adjusting shaft (9) and the male shaft (8) are respectively provided with spline grooves (10) which are convenient for rotation adjustment.
  6. 6. The pedicle screw for spinal surgery according to claim 4, wherein the angle locking boss (11) comprises a fixing ring (15), the fixing ring (15) is fixed in the externally inserted boss (8), a plurality of extending sliding frames (16) are uniformly fixed on the outer wall of the fixing ring (15), an extending sliding clamping table (17) is limited and slides in the extending sliding frames (16), a rotating gear (18) is connected in the extending sliding frames (16) through short shaft rotation, the rotating gear (18) is meshed with one side of the extending sliding clamping table (17), and the rotating gear (18) is meshed with the upper end of the combined adjusting shaft (9).
  7. 7. The pedicle screw for spinal surgery according to claim 6, wherein the extended slide clamping table (17) is limited to slide in a boss extended groove (13) of the male shaft (8), and the extended slide clamping table (17) sliding outwards is inserted into an inner groove slot of the screw seat jack (4).
  8. 8. The pedicle screw for spinal surgery according to claim 4, wherein the lower clamping seat (12) comprises an inner threaded ring (19), the inner threaded ring (19) is connected to the lower side of the combined adjusting shaft (9) through threaded fit, the outer wall of the inner threaded ring (19) is hinged with a plurality of hinging rods (20) through short shafts, the outer sides of the hinging rods (20) are hinged to the inner sides of hinging clamping rods (21), and the lower ends of the hinging clamping rods (21) are hinged in the holding-down clamping grooves (14) of the externally inserted protruding shafts (8) through holding-down hinging shafts (22).
  9. 9. A pedicle screw for spinal surgery as claimed in claim 8, characterized in that said hinge clamping rod (21) is inserted into a lower clamping groove in the lower insertion hole (6) when extending outwards.
  10. 10. The pedicle screw for spinal surgery according to claim 1, wherein the root screw connecting rod (23) is inserted into the screw tail (1) of the pedicle screw, the screw tails (1) are connected through the root screw connecting rod (23), and a plurality of ball couplings (24) are arranged in the root screw connecting rod (23).

Description

Pedicle screw for spinal surgery Technical Field The invention relates to the technical field of orthopedic surgery, in particular to a pedicle screw for spinal surgery. Background Early-onset scoliosis (EOS) refers to a spinal deformity that occurs before age 10, accounting for 15% -20% of the spinal deformity. The currently widely accepted technique for treating EOS is the guided growth technique in a growth-friendly technique, which, because of avoiding the intervention of multiple distraction operations, should theoretically greatly reduce the spontaneous fusion rate and the incidence of skin-breach infection compared with the traditional growth rod. The utility model provides a medical equipment based on direction growth technique that clinically widely used at present is similar to a step-by-step locking formula is from universal pedicle screw fixing device of broken screw of patent number CN202120640186.2, and this fixing device mainly used pedicle screw and dead lever equipment belongs to medical instrument technical field, including screw seat, from broken screw, two-way screw, briquetting, screw head, snap ring, dead lever. The screw seat is characterized in that U-shaped grooves are formed in two side walls of the screw seat, annular grooves are formed in the inner walls of the bottom of the screw seat, clamping rings are embedded in the annular grooves of the screw seat, screw heads are sleeved with pressing blocks, the screw seat is arranged in the screw seat from the bottom, external threads of two-way screws are locked with rectangular internal threads of the screw seat, rectangular external threads of self-breaking screws are locked with the internal threads of the two-way screws, the screw heads and fixing rods can be locked step by step, flexibility of placement and controllability of angles of universal pedicle screws are achieved, twisting moment of the self-breaking screws is consistent, quantized locking is achieved, operation efficiency and accuracy are improved, but the pedicle screws in the form cannot rotate the root screws by an accurate angle after pedicle drilling and puncturing are completed, and therefore integral connection support of a plurality of root screws cannot be correspondingly carried out. Disclosure of Invention Therefore, the invention aims to solve the technical problems that in the prior art, the existing pedicle screw cannot accurately rotate the root nails at an angle after the pedicle screw is drilled and pierced, and further cannot correspondingly and integrally connect and support a plurality of root nails. The technical scheme is that the pedicle screw for spinal surgery comprises a screw body, wherein the upper end of the screw body is rotatably provided with a screw tail, an inner screw seat is inserted between the screw tail and the screw body, and the inner screw seat is rotated in the screw tail to adjust the angle of the screw tail and the connection relation between the screw body. Preferably, the center of the upper end of the nail tail is longitudinally penetrated and provided with a nail seat jack, the lower end of the nail tail is provided with a limiting swivel, the upper end of the nail body is provided with a limiting swivel groove, and the nail tail is in the limiting swivel groove in a limiting sliding manner through the limiting swivel. Preferably, the center of the nail body is provided with a lower jack, the lower jack is communicated with the nail seat jack, a plurality of limiting convex grooves are uniformly formed in the lower jack, and the bottom ends of the limiting convex grooves are provided with lower clamping grooves. Preferably, the inner nail seat comprises an outer inserting convex shaft, the outer inserting convex shaft is inserted into the lower inserting hole in a limiting mode through a nail seat inserting hole, a combined adjusting shaft is arranged in the outer inserting convex shaft in a rotating mode, the combined adjusting shaft is meshed with the transmission angle locking convex seat through a gear, and the combined adjusting shaft is connected with the lower clamping seat in a threaded fit mode. Preferably, the upper and lower both sides of outer plug protruding axle outer wall evenly be provided with a plurality of boss extension grooves and hold-down draw-in groove, the upper end of combination regulating spindle and plug protruding axle all is provided with the spline groove of convenient rotation regulation. Preferably, the angle locking convex seat comprises a fixed ring, the fixed ring is fixed in the externally inserted convex shaft, a plurality of extending sliding frames are uniformly fixed on the outer wall of the fixed ring, an extending sliding clamping table is limited and slides in the extending sliding frames, a rotating gear is connected in the extending sliding frames through a short shaft in a rotating mode, the rotating gear is meshed with one side of the extending sliding clamping table, and t