TWM458938U - Multi-axial hollow bone screw - Google Patents

Description

Multiaxial hollow bone nail

The present invention relates to a hollow bone nail, especially a multi-axial hollow bone nail capable of regulating the flow of bone perfusion, which can quantitatively and effectively infuse bone mud into the loose vertebral body, and can adjust the bone mud flow to avoid bone. The backflow of the mud causes damage to the multiple axial mechanisms of the nail, and it is impossible to mount the connecting rod or overflow to the nerve hole, causing spinal stenosis.

For the patients with osteoporosis, the hollow bone nail that can be perfused with bone bone is one of the methods to effectively strengthen the strength of the bone nail and the natural bone interface. The nail is stable and effective, which affects the success or failure of the spinal surgery. The key is important. However, when the bone cement is infused with the tool to the hollow bone nail, the internal bone pressure of the bone nail is relatively dense, so that the internal pressure of the hollow inner tube of the bone nail is high, and the thick gel-like bone mud is not easily injected, resulting in the frequent occurrence of bone mud countercurrent. Overflow, excessive backflow of bone mud is likely to cause damage to multiple axial mechanisms of the nail and failure to mount the connecting rod or overflow to the nerve hole leading to spinal stenosis.

The present invention provides a multi-axial hollow bone nail capable of adjusting the flow rate of perfused bone mud, comprising: a hollow cone screw, a multi-axial rotating thread head, a stopper and a stop screw, a hollow cone screw The main body is provided with a plurality of segment inner diameter axial center through holes and a plurality of lateral perforations, and the plurality of lateral perforations and the multi-segment inner diameter axial center through hole are single-sided conduction, and the hollow conical screw end A ball portion is provided, and the surface of the ball portion is provided with a plurality of concentric grooves and a tool hole. Inserting a multi-axially rotating threaded thread and a hollow tapered screw with a bone nail implanting instrument The tool hole, the bone nail implanting device and the multi-axial hollow bone nail capable of adjusting the flow rate of the perfused bone mud can be integrated into the vertebral body with a plurality of axial hollow nails capable of adjusting the flow rate of the perfused bone mud. The bone mud extrusion auxiliary device is inserted into and abuts against the multi-segment inner diameter axial center through hole of the hollow cone screw, and the bone mud is extruded through the multi-section inner diameter axial center through hole passage and injected into the bone. Mud, bone mud through the multi-section inner diameter axial center through hole and lateral perforation can be evenly distributed in the vertebrae. When the backflow of the bone mud occurs, the inner diameter of the different sections of the axial center through hole of the multi-section inner diameter can be used to instantly adjust the amount of backflow of the bone mud, delay the countercurrent speed, and prevent the backflow of the bone mud from overflowing. The purpose of perfusion of bone mud flow can be adjusted. A multi-axially rotating threaded head is a hollow U-shaped body, wherein the hollow U-shaped body is provided with a ball recess, a thread and a card slot, wherein the ball recess is provided with a plurality of concentric circular grooves, and the ball recess is provided for the hollow cone The ball portion of the screw rotates in multiple directions therein. The one block is a hollow short cylinder, the top surface is provided with a lug, and the concave bottom surface of the ball is provided with a plurality of concentric circular grooves, and the lugs of the stopper can be engaged with the card slot of the multi-axial rotating thread head. a fixing rod passes through the U-shaped body of the multi-axially rotating threaded head, a stop screw is screwed into the thread of the U-shaped body of the multi-axially rotating threading head and abuts the fixing rod, and the fixed fixing rod is pressed downward The block and the hollow cone-shaped screw are fixed at an angle, wherein the concentric circular groove of the multi-axial rotating thread head, the concentric circular groove of the stopper and the concentric circular groove of the hollow tapered screw are interlocked by pressure to clamp and increase friction, and enhance The hollow cone screw and the multi-axial rotating thread head have a fixed angle of force, so that the angle of the axial hollow bone nail which can be adjusted by the creation of the bone mud flow can be more difficult to loosen after being implanted, and the lock can be adjusted according to the bone condition of the patient. Into the direction, improve the chances of successful surgery.

10‧‧‧ hollow cone screw

11‧‧‧Multi-section inner diameter axial center through hole

12‧‧‧ lateral perforation

13‧‧‧The ball department

131‧‧‧Concentric circular trough

20‧‧‧Multi-axis rotating thread head

21‧‧‧ Ball recess

211‧‧‧Concentric circular trough

22‧‧‧ thread

23‧‧‧ card slot

30‧‧‧blocks

31‧‧‧ lugs

32‧‧‧Concentric circular trough

40‧‧‧stop screws

50‧‧‧Fixed rod

The first figure is a perspective exploded view of an embodiment of the present invention.

Second: A schematic cross-sectional view of an embodiment of the present invention.

The third figure is a three-dimensional diagram of an implementation state of the present creation.

The following specific examples are merely illustrative of the best mode of the present invention and are not intended to limit the scope of the present invention. Appropriate changes and modifications can be made by those of ordinary skill in the art without departing from the spirit of the present invention.

Referring to the first to third figures, the present invention provides a multi-axial hollow bone nail capable of adjusting the flow rate of the perfused bone mud, comprising: a hollow tapered screw 10, a multi-axial rotating thread head 20, a stopper 30 and a stop screw 40, the hollow cone screw 10 body is provided with a multi-segment inner diameter axial center through hole 11 and a plurality of lateral perforations 12, the plurality of lateral perforations 12 and the plurality of sections The segment inner diameter axial center through hole 11 is open on one side, and one end of the hollow conical screw 10 is provided with a spherical portion 13 having a plurality of concentric circular grooves 131 and a tool hole 132.

The bone nail implanting device (not shown) locks and locks the thread 22 of the multi-axially rotating threaded head 20 and the tool hole 132 of the hollow tapered screw 10, so that the bone nail implanting device (not shown) and the adjustable The multi-axial hollow bone nail which is filled with the bone mud flow can be integrated into the vertebral body and the bone mud extrusion auxiliary device (not shown). Nested and abutted against the multi-segment inner diameter axial center of the hollow tapered screw 10 through the hole 11, the bone mud is squeezed through the multi-section inner diameter axial center through hole 11 channel and injected into the bone mud, bone mud The multi-segment inner diameter axial center through hole 11 and the lateral perforation 12 can be evenly distributed in the vertebra.

When the backflow of the bone mud occurs, the inner diameter design of the different sections of the axial center through hole 11 of the multi-segment inner diameter can be used to instantly adjust the amount of backflow of the bone mud, delay the countercurrent velocity, and prevent the backflow of the bone mud from overflowing. The purpose of regulating the flow of perfused bone mud is achieved. One multi-axis rotary thread The head 20 is a hollow U-shaped body, and the hollow U-shaped body is provided with a ball recess 21, a thread 22 and a card slot 23, wherein the ball recess 21 is provided with a plurality of concentric circular grooves 211, and the ball concave portion 21 is provided for the hollow cone The spherical portion 13 of the screw 10 is axially rotated therein.

A stopper 30 is a hollow short cylinder, the top surface is provided with a lug 31, and the spherical concave bottom surface is provided with a plurality of concentric circular grooves 32, and the lug 31 of the stopper 30 can be coupled with the multi-axial rotation thread head 20 The card slot 23 is stuck, and a fixing rod 50 is passed through the U-shaped body of the multi-axially rotating threaded head 20, and a stop screw 40 is screwed into the thread 22 of the U-shaped body of the multi-axially rotating threaded head 20 and is fixedly fixed. The fixing rod 50 is connected to the fixing rod 50 downwardly against the stopper 30 and the hollow tapered screw 10 to fix the angle, wherein the concentric circular groove 211 of the multi-axial rotation thread head 20, the concentric circular groove 32 of the stopper 30 and the hollow The concentric circular grooves 131 of the conical screw 10 are engaged with each other by pressure and increase the friction force, and the angular fixing force of the hollow conical screw 10 and the multi-axial rotating thread head 20 is enhanced, so that the creation can adjust the flow rate of the perfused bone mud. After the multi-axial hollow bone nail is implanted, the angle is less likely to be loosened, and the locking direction can be adjusted according to the bone condition of the patient, thereby improving the chance of successful operation.

10‧‧‧ hollow cone screw

11‧‧‧Multi-section inner diameter axial center through hole

12‧‧‧ lateral perforation

13‧‧‧The ball department

131‧‧‧Concentric circular trough

20‧‧‧Multi-axis rotating thread head

21‧‧‧ Ball recess

211‧‧‧Concentric circular trough

22‧‧‧ thread

23‧‧‧ card slot

30‧‧‧blocks

31‧‧‧ lugs

32‧‧‧Concentric circular trough

40‧‧‧stop screws

Claims (2)

A multi-axial hollow bone nail, comprising: a hollow cone screw, a multi-axial rotation thread head, a stopper and a stop screw; the hollow cone screw body has a multi-section inner diameter The axial center through hole and the plurality of lateral perforations, the plurality of lateral perforations and the multi-segment inner diameter axial center through hole are single-sided conduction, and one end of the hollow conical screw is provided with a spherical portion, the circle The surface of the ball portion is provided with a plurality of concentric circular grooves and a tool hole; the multi-axial rotating thread head is a hollow U-shaped body, and the hollow U-shaped body is provided with a ball concave portion, a thread and a card slot, wherein the ball concave portion is provided There is a plurality of concentric circular grooves, wherein the spherical recess portion is rotated in the axial direction of the spherical portion of the hollow tapered screw; the stopper is a hollow short cylindrical body, and the top surface thereof is provided with a lug, and the spherical concave bottom surface a plurality of concentric circular grooves are provided, the lugs of the blocking block can be engaged with the slot of the multi-axially rotating threaded head; and a fixing rod passes through the U-shaped body of the multi-axially rotating threaded head, the stop screw screw Inserting the thread in the U-shaped body of the multi-axis rotary threading head and abutting the fixing rod, the connection The fixed rod is fixed downward by abutting against the stopper and the hollow tapered screw. The multi-axial hollow nail according to claim 1, wherein the concentric circular groove of the multi-axial rotating thread head, the concentric circular groove of the stopper and the concentric circular groove of the hollow conical screw are mutually engaged by pressure The card is tightened and the friction is increased to enhance the angular fixing force of the hollow tapered screw and the multi-axial rotating thread.