CN211023035U

CN211023035U - Interspinous process distraction device

Info

Publication number: CN211023035U
Application number: CN201921221413.7U
Authority: CN
Inventors: 周建明
Original assignee: Zhejiang Kangci Medical Technology Co ltd
Current assignee: Zhejiang Kangci Medical Technology Co ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2020-07-17
Anticipated expiration: 2029-07-31

Abstract

The utility model discloses an interspinous process strutting device for fixing vertebra. The device consists of an upper part of a vertebral body, a middle part of the vertebral body and a lower part of the vertebral body, wherein the upper part of the vertebral body and the lower part of the vertebral body are both in a U-shaped groove structure, and the opening directions of the U-shaped grooves of the upper part of the vertebral body and the lower part of the vertebral body are opposite; the middle part of the vertebral body is of an S-shaped structure, the upper end of the S shape is connected with the bottom of the U-shaped groove at the upper part of the vertebral body and is positioned on the same plane, the lower end of the S shape is connected with the bottom of the U-shaped groove at the lower part of the vertebral body and is positioned on the same plane, a plurality of convex lower barb tooth forms are arranged on the outer walls of the upper end and the lower end of the S shape, and the lower end of the S shape extends towards the upper part of the vertebral body and is bent to form an arc; the upper barb tooth profile and the lower barb tooth profile are positioned on the same side; the bottom of the U-shaped groove at the upper part of the vertebral body is provided with a U-shaped through hole. The utility model has the advantages of small operation wound, strong mobility of the vertebral body after the operation, good stability, simple, safe and durable performance, difficult displacement and separation, etc.

Description

Interspinous process distraction device

Technical Field

The utility model relates to a medical appliance, in particular to an interspinous process strutting device for fixing vertebra.

Background

Currently, when treating spinal diseases or injuries, a spinal fixation device is generally adopted to perform a fixation operation on the spine, or an artificial vertebral body is used as a substitute to perform an operation.

The commonly used spine fixing device is composed of a longitudinal rod and a pedicle screw, and the connection and fixation of the longitudinal rod and the pedicle screw can directly affect the operation effect and quality. The longitudinal rod and the pedicle screws are fixedly connected through a fastening mode of screwing screws, so that the operation is not convenient enough, and the screw heads of the pedicle screws are easily spread and separated out when the screws are pressed, so that the operation failure is caused. If the screw head of the pedicle screw is prevented from slipping when the screw is compressed, the requirement on manufacturing materials of the pedicle screw is improved, and the pedicle screw must have a certain height in size, so that the occupied space of the pedicle screw in a human body is increased, the operation quality is influenced, and the pain of a patient is increased.

The artificial vertebral body substitute is made of different materials, such as variant bones, ceramics, metal and the like, wherein the variant bones have the defects of limited sources, immunological rejection reaction and the like, the ceramics are easy to be broken in vivo and easily damaged by fatigue, and the titanium alloy not only can provide the immediate stability after operation, but also is relatively close to the elastic modulus of a human body. The partial artificial vertebral body has adjustability for restoring the height of the vertebral body, but the biggest disadvantage is that the mobility of the vertebral body at the operation position is completely removed. Obviously, the conventional artificial vertebral body still has some problems to be solved in some aspects, in particular, the mobility stability of the vertebral body after operation is not enough, the early bonding strength with the upper vertebral body and the lower vertebral body is low, and the complications are easy to cause the displacement and even the prolapse of the implant, limited spinal motion function at the operation position, a series of load increase and degeneration acceleration caused by compensatory excessive movement of the adjacent section of the spinal column, and the like.

Lumbar degenerative disease is a common frequently-occurring disease in spinal surgery, the diseased population expands year by year, and the trend of the disease to become more and more obvious. Lumbar fusion is the main means for treating diseases such as lumbar disc-derived pain, segmental instability, spondylolisthesis and the like, and although the application of internal fixation greatly improves the fusion rate and clinical results, the problems related to the fusion are still few. For example, conventional spinal fusion internal fixation procedures may present the problem of accelerated disc degeneration of adjacent segments.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a interspinous process strutting device which has small operation trauma, stronger mobility of the postoperative vertebral body, good stability, simple, safe and durable performance, is difficult to shift and deviate from and makes young patients easier to accept.

The utility model provides a technical scheme that above-mentioned problem adopted is: the interspinous process distraction device consists of an upper vertebral body part, a middle vertebral body part and a lower vertebral body part which are sequentially connected into an integral structure, and is structurally characterized in that the upper vertebral body part and the lower vertebral body part are both of U-shaped groove structures, and the opening directions of the U-shaped grooves of the upper vertebral body part and the lower vertebral body part are opposite; the middle part of the vertebral body is of an S-shaped structure, the upper end of the S shape is connected with the bottom of the U-shaped groove at the upper part of the vertebral body and is positioned on the same plane, the outer wall of the upper end of the S shape is provided with a plurality of convex upper barb tooth forms, the lower end of the S shape is connected with the bottom of the U-shaped groove at the lower part of the vertebral body and is positioned on the same plane, the outer wall of the lower end of the S shape is provided with a plurality of convex lower barb tooth forms, and the lower end of the S shape extends towards the upper part of the vertebral body and is; the upper barb tooth profile and the lower barb tooth profile are positioned on the same side; the bottom of the U-shaped groove at the upper part of the vertebral body is provided with a U-shaped through hole.

The inboard of the lateral wall of centrum upper portion and centrum lower part U-shaped recess all is equipped with the triangle profile of tooth of a plurality of evaginations with the outside.

The side walls of the upper part and the lower part of the vertebral body are respectively provided with two oval screw holes.

The upper part of the vertebral body, the middle part of the vertebral body and the lower part of the vertebral body of the utility model are made of titanium alloy materials.

The inboard of the lateral wall of centrum upper portion and centrum lower part U-shaped recess is equipped with the triangle profile of tooth of two evaginations, and the outside of the lateral wall of centrum upper portion and centrum lower part U-shaped recess is equipped with the triangle profile of tooth of five evaginations.

compared with the prior art, the vertebral body grafting device has the advantages that 1, the vertebral body grafting device is a metal device inserted between spinous processes, the cross section diameter of a narrow tube of a neurogenic claudication patient is increased, the middle portion of the vertebral body grafting device is installed between the spinous processes and wings in an S-shaped structure, the vertebral body grafting device can prevent the vertebral body grafting device from moving after implantation, the S-shaped structure is longitudinally elastic and can be compressed, the vertebral body grafting device can be conveniently implanted into a human body, the stability and the mobility of the vertebral body can be considered, bone grafting fusion is not needed, the physiological activity function of the lumbar vertebra is preserved, enough stability is provided, chronic lumbago caused by instability of the lumbar vertebra after operation is reduced to the maximum extent, 2, the vertebral body grafting device is made of a titanium alloy material, the biocompatibility is good, the vertebral body grafting fusion device does not need to be taken out again, the vertebral body grafting fusion device is suitable for medium-to severe compression verified by imaging examination, nerve element damage, the claudication and/or nerve root symptom is separated to 1 or 2, the vertebral body grafting device is accompanied or not accompanied by lower lumbodynia, 3, the device is provided with triangle tooth profile of the upper portion and lower portion, the vertebral body inner side wall of the vertebral body, the vertebral body is provided with a triangle tooth profile of the vertebral body, the vertebral body grafting fusion device is provided with a stable and the vertebral body, the vertebral body grafting device is not easy to reduce the vertebral body grafting of vertebral body grafting, the vertebral body grafting of vertebral body grafting, the vertebral body grafting of vertebral body, the vertebral body grafting of vertebral body, the vertebral body.

Drawings

Fig. 1 is a front view of an embodiment of the present invention.

Fig. 2 is a left side view of the embodiment of the present invention.

Fig. 3 is a right side view of the embodiment of the present invention.

Fig. 4 is a top view of an embodiment of the present invention.

Fig. 5 is a bottom view of the embodiment of the present invention.

Fig. 6 is a perspective view of an embodiment of the present invention.

Fig. 7 is a perspective view of another angle according to the embodiment of the present invention.

Fig. 8 is a usage status diagram of the embodiment of the present invention.

Detailed Description

referring to fig. 1-8, the present embodiment is made of Ti-6Al-4VE L I titanium alloy (ASTM F136), and is composed of a vertebral body upper portion 1, a vertebral body middle portion 2 and a vertebral body lower portion 3 which are sequentially connected as an integral structure, the vertebral body upper portion 1 and the vertebral body lower portion 3 are U-shaped groove structures, the U-shaped groove openings of the two are opposite, the vertebral body middle portion 2 is an S-shaped structure, the upper end of the S-shape is connected with the bottom of the U-shaped groove of the vertebral body upper portion 1 and located on the same plane, and the outer wall of the upper end of the S-shape is provided with five convex upper barb tooth forms 4, the lower end of the S-shape is connected with the bottom of the U-shaped groove of the vertebral body lower portion 3 and located on the same plane, and the outer wall of the lower end of the S-shape is provided with two convex lower barb teeth forms 5, and the lower end of the S-shape extends toward the vertebral body upper portion 1 and bends to form an arc portion 6.

Five convex triangular tooth forms 7 are arranged on the inner sides of the side walls of the U-shaped grooves of the upper part 1 and the lower part 3 of the vertebral body, and two convex triangular tooth forms 7 are arranged on the outer sides of the side walls of the U-shaped grooves of the upper part 1 and the lower part 3 of the vertebral body to help the interspinous process distraction device to be fixed in a human body and not easy to shift and fall off so as to obtain stability. Once the proper position has been achieved, the clamp securely crimps the superior 1 and inferior 3 vertebral bodies of the interspinous process distraction device, and the triangular teeth 7 on the sidewalls of the superior 1 and inferior 3 vertebral bodies firmly bite into the cortex of the spinous processes.

Two oval screw holes 8 are respectively arranged on the side walls of the upper part 1 and the lower part 3 of the vertebral body and used for fixing the screws. When the ligament is reconstructed, the ligament is sewed through the oval screw hole 8 and the supraspinous ligament.

Claims

1. The utility model provides an interspinous process distraction device, by connect gradually as an organic whole structure centrum upper portion (1), centrum middle part (2) and centrum lower part (3) constitute, characterized by: the upper part (1) and the lower part (3) of the vertebral body are both of U-shaped groove structures, and the opening directions of the U-shaped grooves of the upper part and the lower part are opposite; the middle part (2) of the vertebral body is of an S-shaped structure, the upper end of the S shape is connected with the bottom of the U-shaped groove of the upper part (1) of the vertebral body and is positioned on the same plane, the outer wall of the upper end of the S shape is provided with a plurality of convex upper barb tooth forms (4), the lower end of the S shape is connected with the bottom of the U-shaped groove of the lower part (3) of the vertebral body and is positioned on the same plane, the outer wall of the lower end of the S shape is provided with a plurality of convex lower barb tooth forms (5), and meanwhile, the lower end of the S shape extends towards the upper part (1) of the vertebral body and is; the upper barb tooth form (4) and the lower barb tooth form (5) are positioned on the same side; the bottom of the U-shaped groove of the upper part (1) of the vertebral body is provided with a U-shaped through hole (9).

2. The interspinous process distraction device of claim 1, wherein: the inner side and the outer side of the side wall of the U-shaped groove of the upper part (1) and the lower part (3) of the vertebral body are both provided with a plurality of convex triangular tooth forms (7).

3. The interspinous process distraction device of claim 1, wherein: two oval screw holes (8) are respectively arranged on the side walls of the upper part (1) and the lower part (3) of the vertebral body.

4. The interspinous process distraction device of claim 1, wherein: the upper part (1) of the vertebral body, the middle part (2) of the vertebral body and the lower part (3) of the vertebral body are made of titanium alloy materials.

5. The interspinous process distraction device of claim 2, wherein: the inner sides of the side walls of the U-shaped grooves of the upper part (1) and the lower part (3) of the vertebral body are provided with five convex triangular tooth forms (7), and the outer sides of the side walls of the U-shaped grooves of the upper part (1) and the lower part (3) of the vertebral body are provided with two convex triangular tooth forms (7).