阅读说明：本技术 下胫腓仿生固定系统 (Bionic fixing system for tibiofibula ) 是由 张奇 陈伟 赵明明 林志雄 张英泽 王建雄 郭晓勇 蔡国雄 于 2021-07-27 设计创作，主要内容包括：本发明公开了下胫腓仿生固定系统,包括腓骨端的固定机构、螺栓、紧固索和胫骨侧的锁紧螺帽,该紧固索连接在固定机构和螺栓之间,该锁紧螺帽螺接在螺栓,该螺栓外周凹设有多个沿螺栓轴线间隔布置且呈环形结构的折断槽,在术中可根据需要可在不同位置折断,实现更加精准的固定,断端即不太长而刺激皮肤,也不太短而使螺帽松脱,一系统可适配不同患者,降低成本,提高治疗效果。(The invention discloses a lower tibiofibula bionic fixing system, which comprises a fixing mechanism at the fibula end, a bolt, a fastening cable and a lock nut at the tibia side, wherein the fastening cable is connected between the fixing mechanism and the bolt, the lock nut is screwed on the bolt, the periphery of the bolt is concavely provided with a plurality of breaking grooves which are arranged at intervals along the axis of the bolt and are of an annular structure, the breaking grooves can be broken at different positions according to requirements in an operation, more accurate fixing is realized, the broken ends are not too long to stimulate skin, and are not too short to loosen the nut, one system can be adapted to different patients, the cost is reduced, and the treatment effect is improved.)

1. The bionic fixing system for the lower tibiofibula is characterized in that: including the locking nut of fixed establishment, bolt, fastening cable and shin bone side of fibula end, this fastening cable is connected between fixed establishment and bolt, and this locking nut spiro union is equipped with a plurality of broken grooves that are arranged and be the loop configuration along bolt axis interval in the bolt periphery recess at the bolt.

2. The tibiofibular biomimetic fixation system of claim 1, wherein: the bolt is provided with a threaded section and a connecting section extending forwards from the threaded section, the front end of the connecting section is set to be a sharp end, the broken groove is arranged in the threaded section, and the width of the broken groove from the groove opening to the groove bottom is gradually reduced.

3. The tibiofibular biomimetic fixation system of claim 2, wherein: the bolt further comprises an installation section, the threaded section is fixedly arranged between the connection section and the installation section, the installation section is provided with a front seam line hole, and the fastening cable is connected with the front seam line hole.

4. The tibiofibular biomimetic fixation system of claim 1, 2 or 3, wherein: the fastening rope comprises metal wires, ultra-high molecular weight polyethylene and polyester suture threads which are arranged in parallel.

5. The tibiofibular biomimetic fixation system of claim 1, 2 or 3, wherein: the locking nut comprises a threaded sleeve and a knob sleeve, the threaded sleeve and the knob sleeve are coaxially fixed, the knob sleeve is positioned in front of the threaded sleeve, and the outer diameter of the knob sleeve is larger than that of the threaded sleeve.

6. The tibiofibular biomimetic fixation system of claim 5, wherein: the inner hole of the knob sleeve is designed into a quincuncial structure, and the outer diameter of the outer peripheral wall of the thread sleeve is gradually reduced from front to back.

7. The tibiofibular biomimetic fixation system of claim 1, 2 or 3, wherein: the fixing mechanism comprises a baffle which is of a structure that the left side and the right side are front convex, the vertical middle is back concave, and the upper side and the lower side are back transverse middle.

8. The tibiofibular biomimetic fixation system of claim 7, wherein: two back suture holes which are arranged in a penetrating way are concavely arranged on the baffle, and two ends of the fastening rope penetrate through the two back suture holes.

9. The tibiofibular biomimetic fixation system of claim 7, wherein: the front side wall of the baffle is convexly provided with nail teeth.

10. The tibiofibular biomimetic fixation system of claim 1, 2 or 3, wherein: the fixing mechanism comprises a fixing sleeve and a fibula plate; the fixed sleeve comprises a connecting sleeve and an expanding cover which is formed by extending the rear periphery of the connecting sleeve backwards and has a small front part and a big rear part, and a fixed pin is fixedly arranged in the expanding cover; the fibula plate is provided with a mounting hole which is arranged in a penetrating way, the connecting sleeve of the fixing sleeve is arranged in the mounting hole from back to front, and the expanding cover is in abutting fit with the fibula plate; the fastening rope is arranged in the fixed sleeve, and two ends of the fastening rope penetrate through two sides of the fixed pin.

Technical Field

The invention relates to the technical field of medical devices, in particular to a lower tibiofibular bionic fixing system.

Background

The joint of the tibiofibula is composed of three parts of ligament union, fold and bone connection, the structure is firm and elastic, and the structure is an important stable structure for ensuring the normal movement of the ankle joint. The joint distraction of the tibiofibula is a common clinical injury that can lead to instability of the ankle joint, possibly with secondary osteoarthritis, exacerbating ankle joint damage. The key to treating this is accurate and effective reduction fixation. Currently, tension nail fixation placed 2-3cm above the joint is still considered as a standard fixation method by the internal fixation association (AO/ASIF), however, this rigid fixation method limits the physical micromotion of the tibiofibular to the resistance to early rehabilitation training, which may lead to a series of complications such as implant loosening, fracture, instability of the ankle joint, post-traumatic ankle arthritis, and even functional deterioration. In addition, in recent years, the button belt loop titanium plate technology has been successfully used as flexible fixation of combined injury of the lower tibiofibula, and has good short-term effect. For example, CN101884563A, an orthopedic flexible fixation device, for elastic fixation of orthopedic injuries, comprises a screw, a nut, a fastening cable, and a blocking piece, wherein the front end of the screw is sharp, the rear end of the screw is connected with one end of the fastening cable, the other end of the fastening cable is connected with the blocking piece, the diameter of the screw is 3-5mm, the nut is matched with the screw, the middle part of the screw is provided with a fracture groove, the fracture groove is a continuous groove surrounding the circumference of the screw, and the bottom of the groove is an acute angle. The screw for screwing the nut and the blocking piece are respectively arranged at two sides of the lower tibiofibular joint or the acromioclavicular joint to be fixed, and the middle is tightened by a fastening rope to implement flexible fixation. It still has the following disadvantages: the too long screw easily stimulates skin, and the too short screw easily makes nut structure pine take off and makes the fixed failure, for improving treatment and fixed stability, every patient all must dispose one set of bionical fixing system alone, or, must support the bionical fixing system of multiple money for the patient to select, leads to the use inconvenient, provides treatment cost.

Disclosure of Invention

The invention provides a tibiofibular bionic fixing system, which overcomes the defects of the tibiofibular bionic fixing system in the background technology.

The technical scheme adopted by the invention for solving the technical problem is as follows: the bionic fixing system for the lower tibiofibula comprises a fixing mechanism, a bolt, a fastening cable and a locking nut, wherein the fixing mechanism is arranged at the fibula end, the locking nut is arranged on the tibia side, the fastening cable is connected between the fixing mechanism and the bolt, the locking nut is in threaded connection with the bolt, and a plurality of breaking grooves which are arranged at intervals along the axis of the bolt and are of an annular structure are concavely arranged on the periphery of the bolt.

In one embodiment: the bolt is provided with a threaded section and a connecting section extending forwards from the threaded section, the front end of the connecting section is set to be a sharp end, the broken groove is arranged in the threaded section, and the width of the broken groove from the groove opening to the groove bottom is gradually reduced.

In one embodiment: the bolt further comprises an installation section, the threaded section is fixedly arranged between the connection section and the installation section, the installation section is provided with a front seam line hole, and the fastening cable is connected with the front seam line hole.

In one embodiment: the fastening rope comprises metal wires, ultra-high molecular weight polyethylene and polyester suture threads which are arranged in parallel.

In one embodiment: the locking nut comprises a threaded sleeve and a knob sleeve, the threaded sleeve and the knob sleeve are coaxially fixed, the knob sleeve is positioned in front of the threaded sleeve, and the outer diameter of the knob sleeve is larger than that of the threaded sleeve.

In one embodiment: the inner hole of the knob sleeve is designed into a quincuncial structure, and the outer diameter of the outer peripheral wall of the thread sleeve is gradually reduced from front to back.

In one embodiment: the fixing mechanism comprises a baffle which is of a structure that the left side and the right side are front convex, the vertical middle is back concave, and the upper side and the lower side are back transverse middle.

In one embodiment: two back suture holes which are arranged in a penetrating way are concavely arranged on the baffle, and two ends of the fastening rope penetrate through the two back suture holes.

In one embodiment: the front side wall of the baffle is convexly provided with nail teeth.

In one embodiment: the fixing mechanism comprises a fixing sleeve and a fibula plate; the fixed sleeve comprises a connecting sleeve and an expanding cover which is formed by extending the rear periphery of the connecting sleeve backwards and has a small front part and a big rear part, and a fixed pin is fixedly arranged in the expanding cover; the fibula plate is provided with a mounting hole which is arranged in a penetrating way, the connecting sleeve of the fixing sleeve is arranged in the mounting hole from back to front, and the expanding cover is in abutting fit with the fibula plate; the fastening rope is arranged in the fixed sleeve, and two ends of the fastening rope penetrate through two sides of the fixed pin.

Compared with the background technology, the technical scheme has the following advantages:

the periphery of the bolt is concavely provided with a plurality of breaking grooves which are arranged at intervals along the axis of the bolt and are of an annular structure, the breaking grooves can be broken at different positions according to needs in an operation, more accurate fixation is realized, firstly, the broken ends are not too long and irritate skin, and are not too short and enable nuts to be loosened, secondly, one system can be adapted to different patients, the cost is reduced, and the treatment effect is improved. The fastening cable is connected between the fixing mechanism and the bolt, and the locking nut is screwed on the bolt, so that the tension can be adjusted, and the requirements of tibiofibular restoration and bionic fixation can be met.

The breaking groove is arranged in the thread section, so that the tension can be adjusted more conveniently.

Thread bush and knob cover coaxial fixed, the knob cover is located before the thread bush, and the knob cover external diameter is greater than the thread bush external diameter, and the operation of being convenient for avoids skin to irritate, improves treatment.

Drawings

The invention is further described with reference to the following figures and detailed description.

Fig. 1 is a perspective view of a tibiofibular biomimetic fixation system according to an embodiment.

Fig. 2 is a perspective exploded view of a tibiofibular biomimetic fixation system according to an embodiment.

Fig. 3 is a schematic cross-sectional view of a tibiofibular biomimetic fixation system according to an embodiment.

Fig. 4 is a front view of a tibiofibular biomimetic fixation system according to an embodiment.

FIG. 5 is a schematic perspective view of a baffle according to an embodiment.

FIG. 6 is a perspective view of an embodiment of a lock nut.

FIG. 7 is a partial perspective view of a bolt according to one embodiment.

Fig. 8 is a schematic view of the use of a tibiofibular biomimetic fixation system according to an embodiment.

Fig. 9 is a schematic cross-sectional view of a second tibiofibular biomimetic fixation system in accordance with an embodiment.

Fig. 10 is a schematic front view of a second tibiofibular biomimetic fixation system according to an embodiment.

Fig. 11 is a partially enlarged schematic view of fig. 9.

Fig. 12 is a perspective view of an embodiment biprofen plate.

Fig. 13 is a perspective view of a second tibiofibular biomimetic fixation system according to an embodiment.

Fig. 14 is a second perspective view of the second tibiofibular biomimetic fixation system of the second embodiment.

Fig. 15 is a schematic view of the bionic fixation system of the second shin-calf.

Detailed Description

Example one

Referring to fig. 1 to 8, the bionic fixing system for the lower tibiofibula comprises a fixing mechanism at the fibula end, a bolt 2, a fastening cable 3 and a lock nut 4 at the tibia side, wherein the fixing mechanism comprises a baffle plate 1, the fastening cable 3 is connected between the baffle plate 1 and the bolt 2, the lock nut 4 is screwed on the bolt 2, a plurality of breaking grooves 21 which are arranged at intervals along the axis of the bolt and are in an annular structure are concavely arranged on the periphery of the bolt 2, and the width of the breaking grooves 21 from the groove opening to the groove bottom is gradually reduced, for example, the breaking grooves are in a conical or trapezoidal structure, so that the bolt can be broken conveniently; the plurality of breaking grooves 21 are arranged so as to be broken at different positions according to needs in the operation, so that one system can be adapted to different patients, the cost is reduced, and the treatment effect is improved. The securing cord 3 comprises a wire, ultra high molecular weight polyethylene and polyester suture arranged in parallel, e.g. formed by intertwined braiding.

In this embodiment: the baffle 1 is of a structure with the left side and the right side being convex in front, the vertical middle being concave in back, and the upper side and the lower side being in front in the back, the middle being horizontal, so as to be capable of being attached to the distal end of a fibula, the baffle 1 is concavely provided with two back suture holes 11 which are arranged in a penetrating way, and the front side wall of the baffle 1 is convexly provided with a plurality of spike teeth 12 to realize skid resistance; the bolt 2 is provided with a threaded section 22, a connecting section 23 and an installing section 24, wherein the connecting section 23 extends forwards from the threaded section 22, the front end of the connecting section 23 is provided with a sharp end, the breaking groove 21 is arranged on the threaded section 22, the threaded section 22 is fixedly arranged between the connecting section 23 and the installing section 24, and the installing section 24 is provided with a front suture hole 25; the fastening rope 3 is in a ring structure, the front part of the fastening rope passes through the front suture hole 25, and the two ends of the rear part of the fastening rope pass through the two rear suture holes 11; this lock nut 4 includes thread bush 41 and knob cover 42, and this thread bush 41 and knob cover 42 are coaxial fixed, and this knob cover 42 is located before thread bush 41, and knob cover 42 external diameter is greater than thread bush 41 external diameter, and this knob cover 42 hole establishes into plum blossom shape structure, and this thread bush 41 periphery wall is arranged by preceding to back external diameter progressively littleer, on the one hand, avoids the skin to irritate, improves treatment, and on the other hand, conveniently constantly screws, makes the bolt position remove in order to tighten up or relax the effect.

The use method of the system comprises the following steps: drilling a hole on the lateral side of the fibula and the inner side surface of the tibia 6, and drilling cortex lycii radicis on the four sides; the fixing mechanism, the bolt 2 and the fastening rope 3 are assembled together; the bolt 2 penetrates out of the skin on the inner side surface of the tibia through the outer side of the fibula, so that the fixing mechanism is attached to the bone surface; the locking nut 4 is matched with the bolt 2 and is continuously screwed to adjust the tension; when the required position is reached, the part of the bolt protruding out of the bone surface is broken in the corresponding breaking groove, the bolt 2 is locked by the locking nut, and the thread sleeve 41 sinks into the bone surface on the inner side of the tibia; it can produce the following technical effects: firstly, implant loosening is avoided, local inflammatory reaction caused by the implant loosening is avoided or reduced, and osteolysis complications are avoided or reduced; secondly, the micromotion function is kept to the maximum extent, and the operation procedure is simplified; thirdly, the wound is small, the operation time is short, and the postoperative recovery is fast; fourthly, stable and reliable elastic fixation and good function recovery are provided.

Example two

Referring to fig. 9 to fig. 15, a difference between the embodiments is: the fixing mechanism comprises a fixing sleeve 51 and a fibula plate 52; the fixing sleeve 51 comprises a connecting sleeve 511 and an expanding cover 512 which is formed by extending the rear edge of the connecting sleeve 511 backwards and has a small front part and a big rear part, and a fixing pin 513 is fixedly arranged in the expanding cover 512; the fibula plate 52 can be attached to the distal end of the fibula and is provided with a mounting hole 521 which is arranged in a penetrating manner, the connecting sleeve 511 of the fixing sleeve 51 is installed into the mounting hole 521 from back to front, the expanding cover 512 is in abutting fit with the fibula plate 52, the mounting hole is provided with a stepped hole as required, and the expanding cover is connected to the large hole section of the stepped hole in an adaptive manner; the rear portion of the fastening cable 3 is installed in the fixing sheath 51 and both ends of the rear portion pass through both sides of the fixing pin 513. Be equipped with fixed cover, the adapter sleeve of fixed cover can implant in the fibula, plays the fixed action, has avoided traditional elasticity fixed line area fine motion to cause bone absorption and the painful discomfort that the steel sheet removed and arouse.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.