CN111449744A

CN111449744A - Bone plate fastener and self-pressurizing minimally invasive locking bone plate system comprising same

Info

Publication number: CN111449744A
Application number: CN202010418687.6A
Authority: CN
Inventors: 甄俊栋; 严忠良; 叶树; 谈进; 严迪恒; 居志杰; 甄伍凡; 李若诚
Original assignee: Changzhou Dazon Medical Devices Co ltd
Current assignee: Changzhou Dazon Medical Devices Co ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2020-07-28

Abstract

The invention relates to a bone plate fastener and a self-pressurization minimally invasive locking bone plate system comprising the same, which are beneficial to solving the problem of limited pressurization power of the existing locking pressurization bone plate. The bone plate fastener includes a shaft and a head secured to an axial end of the shaft. The spliced locking and pressurizing bone fracture plate system with the bone plate fastener at least comprises two splicing plates, the end parts of two adjacent splicing plates, which are close to each other, are spliced through a connecting structure, the connecting structure comprises a first positioning hole and a second positioning hole, the two positioning holes are respectively located at one ends of the two adjacent splicing plates, which are close to each other, when the bone fracture plate body is fixed with bones, the second positioning hole is close to the bones, the orthographic projection of the second positioning hole is located in the first positioning hole, the aperture of the first positioning hole is gradually reduced along the direction close to the second positioning hole, and the bone plate fastener locks the adjacent splicing plates through the connecting structure. The invention can provide the pressurizing power which is larger than that of the existing bone fracture plate, and is convenient for selecting different pressurizing powers according to the conditions of patients in clinical treatment.

Description

Bone plate fastener and self-pressurizing minimally invasive locking bone plate system comprising same

Technical Field

The invention relates to the technical field of locking and pressurizing bone fracture plates, in particular to a bone fracture plate fastener and a self-pressurizing minimally invasive locking bone fracture plate system comprising the same.

Background

At present, a bone fracture plate is one of the main fixing devices for treating long tubular skeletal fractures of limbs, and a conventional bone fracture plate, such as the bone fracture plate disclosed in chinese patent publication No. CN1149246A, is generally a strip-shaped plate or a special-shaped plate made of titanium alloy, cobalt-chromium alloy, or stainless steel material and having a certain thickness, and screw holes are uniformly distributed in the center of the bone fracture plate, and screws are driven into the screw holes to perform a compression fixing effect on broken bones of a patient.

However, clinical practice proves that for osteoporotic fractures or comminuted fractures, the conventional bone fracture plate is difficult to provide sufficient stability for fracture healing at the fracture part, so that the conventional steel plates are used in a large number when fixing the fractures, and pain of patients in treatment is easy to increase or decrease.

For example, Chinese patent with publication No. CN206924105U discloses a DHS locking bone plate with a matched spiral blade, which combines a dynamic pressurizing unit and a locking screw hole through a L CP composite hole arranged on a steel plate of the DHS bone plate, and can freely select to pressurize or lock.

However, the conventional locking and pressurizing bone plate with L CP combination holes has the problem that once the bone plate is formed, the L CP combination holes are fixed in size and position, and when the bone plate is pressurized to bone, the pressure applied to the broken bone by the bone plate can be adjusted only through the inclination angle of the screw on the bone plate, so that the pressure applied to the broken bone by the bone plate is limited, and the locking and pressurizing bone plate cannot meet various requirements of clinical fracture treatment.

Disclosure of Invention

In view of the deficiencies of the prior art, it is an object of the present invention to provide a bone plate fastener which is capable of simultaneously securing two bone plates, which are assembled one above the other, to a bone.

The above object of the present invention is achieved by the following technical solutions:

the bone plate fastener comprises a head part and a rod part, wherein the head part is fixedly connected with one axial end of the rod part; the rod part comprises a front section and a rear section, the front section is arranged close to the head part, a front thread section for being in threaded connection with a bone plate is arranged on the periphery of the front section, a rear thread section for being in threaded connection with a bone is arranged on the periphery of the rear section, and the thread pitches of the front thread section and the rear thread section are equal.

Through adopting above-mentioned technical scheme, to the hone lamella of two upper and lower amalgamations, the pole portion of hone lamella fastener in this scheme can pass two hone lamellas from top to bottom simultaneously, the back end screw in patient fracture position's of pole portion in the skeleton and utilize back screw thread section and skeleton threaded connection, the preceding screw thread section of pole portion anterior segment is used for and is close to the hone lamella threaded connection of skeleton, make the hone lamella fastener in this scheme can realize simultaneously with the effect on the skeleton of two hone lamella of upper and lower amalgamations being fixed in, fix two adjacent hone lamellas when making things convenient for clinical treatment. At the same time, the thread pitch of the front and rear threaded sections are equal, enabling the bone plate fastener to be threaded with the bone plate and bone simultaneously.

The present invention in a preferred example may be further configured to: one end of the rear section, which is far away from the head, is tapered in a taper shape to form a self-tapping end.

Through adopting above-mentioned technical scheme, self tapping end makes the lamella fastener of this scheme change in the screw in skeleton when rotatory.

The present invention in a preferred example may be further configured to: and the self-tapping end is obliquely provided with a self-tapping groove.

By adopting the technical scheme, the notch of the self-tapping groove can form a cutting edge, so that the self-tapping end can be conveniently screwed into a bone.

Aiming at the defects in the prior art, the invention also aims to provide a self-pressurizing minimally invasive locking bone fracture plate system containing a bone plate fastener, which is characterized in that the traditional pressurizing locking bone fracture plate is arranged into a splicing type, the pressurizing range of the bone fracture plate is widened according to the difference of overlapping areas of splicing parts, and the fracture part can be conveniently and clinically pressurized to a greater degree.

a self-pressurization minimally invasive locking bone fracture plate system containing a bone plate fastener comprises at least two splicing plates and the bone plate fastener, wherein each splicing plate is provided with a locking hole, the mutually close end parts of two adjacent splicing plates are mutually connected through a connecting structure to form a bone fracture plate body, the connecting structure comprises a first positioning hole and a second positioning hole, the first positioning hole and the second positioning hole are respectively positioned at the mutually close ends of the two adjacent splicing plates, when the splicing plates are fixed with bones, the first positioning hole is arranged close to the bones, the orthographic projection of the first positioning hole is positioned in the second positioning hole, the aperture of the second positioning hole is gradually reduced along the direction close to the first positioning hole, the head part of the fastener is gradually reduced towards the bone fracture plate, and the bone plate fastener sequentially penetrates through the second positioning hole and the first positioning hole, the side wall of the head of the bone plate fastener, which faces one side of the rod part, is tightly propped against the hole wall of the second positioning hole, the front thread section is in threaded connection with the hole wall of the first positioning hole, and the rear thread section is in threaded connection with a bone.

By adopting the technical scheme, when two splicing plates cling to the periosteum surface of a fracture part along the axial direction of a bone, medical staff can lock one splicing plate on the bone through a locking hole according to the fracture degree of a patient, and then press and push the other unlocked splicing plate towards the locked splicing plate, so that the end parts of the two splicing plates close to each other are overlapped, along with the continuous increase of the overlapping area of the length directions of the two splicing plates, the bone fracture plate in the scheme can continuously press the fracture part, until the first splicing plate and the second splicing plate press and push the fracture part of the patient to a correct reset position, fasteners penetrate into the first positioning hole and the second positioning hole from top to bottom simultaneously, along with the rotation of the bone plate fasteners, the rear section of the bone fracture part of the patient can be screwed in the bone, the front section of the bone fracture plate can be in threaded connection with the second positioning hole, the side wall of the head towards one side of the rod part gradually expands in the direction opposite to the screwing direction of the fracture part, thereby gradually pressing and tightly pressing the connection structure of the first positioning hole can be used for locking the connection structure of the bone fracture part of the patient, so that the compression of the two splicing plates can be easily adjusted by the conventional compression technology, and the compression technology which is more convenient for providing more stable compression, and the compression technology for providing more convenient compression when the compression for the compression of the fracture part in the conventional compression of the conventional bone fracture part, and the conventional compression technology, so that the compression technology, the conventional compression technology for the compression of the conventional compression technology for treating the conventional compression of the conventional.

The present invention in a preferred example may be further configured to: the connecting structure further comprises a first pressurizing propulsion plate and a second pressurizing propulsion plate, the first pressurizing propulsion plate and the second pressurizing propulsion plate are respectively and fixedly connected to one end, close to each other, of two adjacent splicing plates, the first positioning hole is located in the first pressurizing propulsion plate, the second positioning hole is located in the second pressurizing propulsion plate, when the splicing plates are spliced, the end faces, far away from each other, of the first pressurizing propulsion plate and the second pressurizing propulsion plate in the thickness direction are respectively parallel and level with the two end faces of the bone fracture plate body in the thickness direction.

Through adopting above-mentioned technical scheme, the amalgamation of first pressurization propulsion board and second pressurization propulsion board can make the surface of plate body level and smooth more for when the coaptation board in this scheme stretches into the subcutaneous coaptation, be difficult to cause pulling of great degree to patient's soft tissue, the unobstructed of blood circulation around the broken bone when being favorable to the patient coaptation, and then the patient is recovered with higher speed.

The present invention in a preferred example may be further configured to: the second pressurizing and pushing plate is provided with an inserting groove for inserting the first pressurizing and pushing plate, the second positioning hole is positioned in the inserting groove, and when the first pressurizing and pushing plate is inserted in the inserting groove, the outer periphery of the first pressurizing and pushing plate is attached to the inner groove wall of the inserting groove.

Through adopting above-mentioned technical scheme, the cell wall of inserting groove can play limiting displacement to first pressurization propulsion board for be in with the difficult emergence removal of first pressurization propulsion board of second pressurization propulsion board amalgamation state, be favorable to strengthening connection structure's connection stability.

The present invention in a preferred example may be further configured to: when the first pressurizing and propelling plate is spliced with the splicing groove, the end area of the thickness direction of the first pressurizing and propelling plate facing to one side of the bottom of the splicing groove is smaller than the end area of the first pressurizing and propelling plate facing away from one side of the bottom of the splicing groove, and the two end surfaces of the thickness direction of the first pressurizing and propelling plate are connected through inclined planes.

By adopting the technical scheme, when the first pressurizing and pushing plate is inserted into the insertion groove, the first pressurizing and pushing plate easily slides into the insertion groove along the inclined plane, so that the first pressurizing and pushing plate is easier to be inserted into the insertion groove in an alignment manner.

The present invention in a preferred example may be further configured to: the surface of the first pressurizing and pushing plate, which is abutted against the insertion groove, is a concave-convex surface.

Through adopting above-mentioned technical scheme, the setting of corrugated surface has increased the coefficient of friction between first pressurization propulsion board and the inserting groove for first pressurization propulsion board receives the resistance when advancing along the inserting groove, can control the pressurization power of concatenation board, thereby reduces the too big condition emergence of once pressurization. Meanwhile, the friction force between the first pressurizing and propelling plate and the inserting groove is increased, and the connection stability between the first pressurizing and propelling plate and the inserting groove can be improved.

The present invention in a preferred example may be further configured to: the first pressurizing and pushing plate is provided with a plurality of splicing plates which are fixed with the first pressurizing and pushing plate in a length direction, and one surface of the first pressurizing and pushing plate, which is close to the splicing plates, is inclined towards the direction far away from the splicing plates close to the first pressurizing and pushing plate; and a plurality of second propelling racks which are meshed with the first propelling racks are arranged in the inserting grooves, and the second propelling racks incline towards the direction away from the splicing plates close to the second propelling racks towards the surface close to the splicing plates.

Through adopting above-mentioned technical scheme, when first impel the rack and the meshing of second pushing rack, promote the splice plate, can make two adjacent splice plates along the first number of impelling the rack and the second advances the rack and close to each other one by one, can control the pressurization power of splice plate to the too big condition of once pressurizeing appears when avoiding clinical operation. Meanwhile, the first pushing rack and the second pushing rack are arranged obliquely, so that two adjacent splicing plates are easy to push each other and are not easy to keep away from each other, and the splicing stability of the first splicing plate and the second splicing plate is further enhanced.

The present invention in a preferred example may be further configured to: one end of the first pressurizing and propelling plate, which is far away from the splicing plate fixed with the first pressurizing and propelling plate, is linear or arc, and the wall of the inserting groove is square or U-shaped and is matched with the shape of the end part of the first pressurizing and propelling plate; the end part of the second pressurizing and propelling plate, which is far away from the splicing plate fixed with the second pressurizing and propelling plate, is linear or arc, and one end of the splicing plate, which is used for splicing the second pressurizing and propelling plate, is linear or arc matched with the shape of the end part of the second pressurizing and propelling plate.

By adopting the technical scheme, the connecting structures of the two adjacent splicing plates are more inosculated when spliced, and the stability of the connecting structures can be improved. Meanwhile, the end parts of the first pressurizing push plate and the insertion groove, which are close to each other, can be smooth, and the scraping and rubbing of the splicing plates on the soft tissue and the bone surface of a patient can be reduced when the splicing plates extend into the subcutaneous bone fracture.

In summary, the invention includes at least one of the following beneficial technical effects:

1. through the arrangement of the splicing plates, the first positioning hole, the second positioning hole and the bone plate fastener, the compression of different degrees on the broken bone can be conveniently carried out by medical staff according to the fracture severity of a patient during clinical treatment, and two adjacent splicing plates which are compressed and pushed to the correct reset position can be fixed with the bone at the same time, so that stable compression power can be continuously provided for the fracture part; meanwhile, the pressurizing mode of mutual propulsion of the two splicing plates can provide pressurizing power larger than that of the traditional locking and pressurizing bone fracture plate for broken bones, and is convenient for medical staff to pressurize the fracture parts of patients to a greater degree in clinical treatment;

2. the arrangement of the insertion groove can limit the first pressurizing and propelling plate, so that the connection stability of the connection structure is enhanced;

3. the two ends of the first pressurizing and pushing plate in the thickness direction are connected through the inclined surfaces, so that the first pressurizing and pushing plate can easily slide into the insertion groove along the inclined surfaces, and the first pressurizing and pushing plate and the insertion groove can be conveniently aligned and inserted;

4. through the arrangement of the concave-convex surface or the first propelling rack and the second propelling rack, the pressurizing power of the first splicing plate and the second splicing plate is easily controlled, so that the condition of one-time over-pressurization in clinical operation is avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of example 1, wherein the bone plate fastener locks the splice plate in a maximum compression state.

Fig. 2 is an exploded view of the front structure of the splice plate in example 1.

Fig. 3 is an exploded view of the back structure of the splice plate in example 1.

Fig. 4 is a schematic view showing the overall structure of the bone plate fastener in example 1.

FIG. 5 is a schematic view of the entire structure of embodiment 2.

Fig. 6 is an exploded view of a splice bar connection structure embodying example 3.

Fig. 7 is an enlarged schematic view of a portion a in fig. 6.

FIG. 8 is a schematic view of the entire structure of embodiment 4.

Fig. 9 is an exploded view for embodying the splice bar connection relationship in example 4.

Fig. 10 is a schematic structural view of a third splice plate in example 4.

FIG. 11 is a schematic view of the entire structure of embodiment 5.

FIG. 12 is a schematic view of the entire structure of embodiment 6.

Fig. 13 is an exploded view for embodying the splice bar connection relationship in example 6.

FIG. 14 is a schematic structural view of a fourth splice bar of example 6.

FIG. 15 is a schematic view of the entire structure of embodiment 7.

In the drawing, 1 is a splicing plate, 11 is a first splicing plate, 111 is a first pressurizing and pushing plate, 1111 is a first positioning hole, 1112 is a slope, 1113 is a first pushing rack, 12 is a second splicing plate, 121 is a second pressurizing and pushing plate, 1211 is an insertion groove, 1212 is a second positioning hole, 1213 is a second pushing rack, 13 is a third splicing plate, 14 is a fourth splicing plate, 2 is a connecting structure, 3 is a head, 4 is a rod part, 41 is a front section, 411 is a front thread section, 42 is a rear section, 421 is a rear thread section, 422 is a self-tapping end, 423 is a self-tapping groove, 5 is a guide part, 51 is a pressure reducing part, 6 is a stress removing groove, 61 is a stress dispersing part, 7 is a L CP combining hole, 71 is a dynamic pressurizing hole, 72 is a locking screw hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1:

referring to fig. 1, a bone plate fastener and a self-pressurized minimally invasive locking bone plate system including the same disclosed in this embodiment include two splice plates 1, which are a first splice plate 11 and a second splice plate 12, respectively. The end part of the first splicing plate 11 in the length direction is spliced at one end of the second splicing plate 12 in the length direction through the connecting structure 2 to form a bone fracture plate body, and a bone fracture plate fastener penetrates through the connecting structure 2 to lock the connecting structure 2.

Referring to fig. 2, the connection structure 2 includes a first pressing propulsion plate 111 and a second pressing propulsion plate 121 for vertically splicing. The first pressurizing and pushing plate 111 is integrally formed at one end of the first splicing plate 11 in the length direction along the length direction of the first splicing plate 11, the thickness of the first pressurizing and pushing plate 111 is smaller than that of the first splicing plate 11, and the end face of one end of the first pressurizing and pushing plate 111 in the thickness direction is flush with the end face of one end of the first splicing plate 11 in the thickness direction. A circular first positioning hole 1111 penetrates through the first pressurizing propulsion plate 111 along the thickness direction thereof, and a screw thread (not shown) is formed on the hole wall of the first positioning hole 1111.

Referring to fig. 2, the second pressing and pushing plate 121 is integrally formed at one end of the second splicing plate 12 facing the first pressing and pushing plate 111 along the length direction of the second splicing plate 12, and when the first pressing and pushing plate 111 and the second pressing and pushing plate 121 are spliced, one surface of the second pressing and pushing plate 121, which is far away from the first pressing and pushing plate 111 in the thickness direction, is flush with the end surface of one end of the second pressing and pushing plate 121 in the thickness direction.

Referring to fig. 3, an insertion groove 1211 is formed on one surface of the second pressing and pushing plate 121 facing the first pressing and pushing plate 111 in the thickness direction for inserting the first pressing and pushing plate 111. A second positioning hole 1212 penetrates through the insertion groove 1211 along the thickness direction thereof, and the second positioning hole 1212 is a waist-shaped hole extending along the axial direction of the second splice plate 12.

Referring to fig. 2, when the bone plate body is fixed to a bone at a fracture site, the first pressurizing propulsion plate 111 is inserted into the insertion groove 1211, the first positioning hole 1111 is disposed near the bone, an orthographic projection of the first positioning hole 1111 is located in the second positioning hole 1212, an aperture of the second positioning hole 1212 is concavely curved and gradually reduced along a direction close to the first positioning hole 1111, when the first pressurizing propulsion plate 111 moves along the insertion groove 1211, the first positioning hole 1111 can move within an aperture range of the second positioning hole 1212 along a length direction of the second positioning hole 1212, so that the first positioning hole 1111 can be aligned with the second positioning hole 1212 while the pressurizing power of the splice plate 1 is changed, and a bone plate fastener can simultaneously penetrate through the second positioning hole 1212 and the first positioning hole 1111 from top to bottom.

Referring to fig. 4, the bone plate fastener comprises a head 3 and a shaft 4, the head 3 is fixedly connected to one axial end of the shaft 4, and the side of the head 3 facing the shaft 4 is hemispherical and matched with the hole wall of the second positioning hole 1212 in shape, so that the side of the head 3 facing the shaft 4 is in an arc-shaped tapered trend along the direction close to the shaft 4. The rod part 4 comprises a front section 41 and a rear section 42, the front section 41 is arranged close to the head part 3, a front thread section 411 used for being in threaded connection with the first positioning hole 1111 is arranged on the periphery of the front section 41, the tooth form angle of the front thread section 411 is 60 degrees, a rear thread section 421 used for being in threaded connection with a bone of a fracture part of a patient is arranged on the periphery of the rear section 42, the tooth form angle of the rear thread section 421 is 30 degrees, and the thread pitch of the front thread section 411 and the thread pitch of the rear thread section 421 are both 0.8. The end of the rear section 42 away from the head 3 is tapered to form a self-tapping end 422, and the self-tapping end 422 is provided with a self-tapping groove 423 in an inclined manner, so that the self-tapping end 422 forms a cutting edge, and the rear section 42 can be conveniently screwed into a bone.

Referring to fig. 3, when the first pressing and pushing plate 111 is located in the insertion groove 1211, an end area of the first pressing and pushing plate 111 facing the bottom of the insertion groove 1211 in the thickness direction is smaller than an end area of the first pressing and pushing plate facing away from the bottom of the insertion groove 1211, two end surfaces of the first pressing and pushing plate 111 in the thickness direction are connected by an inclined surface 1112, and a groove wall of the insertion groove 1211 is attached to an outer peripheral edge of the first pressing and pushing plate 111.

Referring to fig. 3, the end of the first pressing pushing plate 111 away from the first splicing plate 11 fixed thereto may be straight, and the wall of the insertion groove 1211 is square (not shown) matching with the outer circumference of the first pressing pushing plate 111. The end of the first pressing pushing plate 111 away from the first splicing plate 11 fixed thereto may also be an arc shape protruding outward along the length direction of the first splicing plate 11, and the groove wall of the insertion groove 1211 is U-shaped to fit the outer peripheral shape of the first pressing pushing plate 111, wherein the groove wall of the U-shape can disperse the stress concentrated at the joint of the insertion groove 1211 and the second splicing plate 12. Moreover, the end part of the first pressurizing and pushing plate 111 is smoother due to the arc shape, and when the first splicing plate 11 penetrates into the subcutaneous space of the patient from one end of the first pressurizing and pushing plate 111, the scratch of the first pressurizing and pushing plate 111 on the soft tissue of the patient can be reduced.

Referring to fig. 3, the end of the second pressing and pushing plate 121 far from the first splicing plate 11 fixed thereto may be linear, and the fixed connection between the first splicing plate 11 and the first pressing and pushing plate 111 is linear (not shown in the figure) matching with the shape of the end of the second pressing and pushing plate 121. The end of the second pressing and pushing plate 121 far away from the first splicing plate 11 fixed thereto may also be an arc protruding outward along the length direction of the first splicing plate 11, and the fixed connection between the first splicing plate 11 and the first pressing and pushing plate 111 is an arc (see fig. 2) fitting the shape of the end of the second pressing and pushing plate 121, wherein the arc connection between the first splicing plate 11 and the first pressing and pushing plate 111 can disperse the stress concentrated at the connection between the first splicing plate 11 and the first pressing and pushing plate 111. Moreover, the end of the second pressurizing and pushing plate 121 is smoother due to the arc shape, and when the second splicing plate 12 penetrates into the subcutaneous space of the patient from one end of the second pressurizing and pushing plate 121, the scratch of the second pressurizing and pushing plate 121 on the soft tissue of the patient can be reduced.

Referring to fig. 2 and 3, in one embodiment, the surface of the first pressure-feed plate 111 and the insertion groove 1211 abutting against each other may be a smooth surface, and in another embodiment, the surface of the first pressure-feed plate 111 and the insertion groove 1211 abutting against each other may be formed with a concave-convex surface (concave-convex shape is not shown) by shot blasting, sand blasting, oxidation, or the like, wherein the concave-convex surface can increase the frictional resistance between the first pressure-feed plate 111 and the insertion groove 1211 while being pushed against each other, and reduce the possibility of one-time over-pressurization during pressure-feed.

Referring to fig. 3, the end portions of the first splicing plate 11 and the second splicing plate 12 far away from the connecting structure 2 are arranged to be guide portions 5, the guide portions 5 are arc-shaped portions protruding outwards along the length direction of the first splicing plate 11 or the second splicing plate 12, when the first splicing plate 11 or the second splicing plate 12 penetrates into the subcutaneous space of a patient from the guide portions 5, the guide portions 5 are easy to gradually open soft tissues of the patient, and pain in the process of connecting the patient is reduced. The one side that skeleton was kept away from to first splice plate 11 and second splice plate 12 thickness direction all seted up curved stress portion 61 that disperses, and the portion 61 that disperses extends along the length direction of first splice plate 11 to stress, and the portion 61 that disperses is located the both sides of first splice plate 11 and second splice plate 12 width direction, and the portion 61 left and right sides that disperses forms the intercommunication at guide part 5 to stress. The guide part 5 is bent towards the stress dispersion part 61 in an arc shape to form a decompression part 51, so that the compression of the bone of the patient when the first splicing plate 11 and the second splicing plate 12 are fixed on the surface of the bone is reduced, and a passage is provided for the blood supply of periosteum and soft tissues.

Referring to fig. 3, a plurality of locking holes for fixing the two splicing plates 1 and the bone are respectively formed in the first splicing plate 11 and the second splicing plate 12 along the length direction of the first splicing plate 11 and the second splicing plate 12, the locking holes may be L CP combination holes 7, or any hole type capable of allowing bolts to pass through to fix the two splicing plates 1 and the bone, the locking holes in this embodiment are preferably L CP combination holes 7, L CP combination holes 7 include a dynamic pressure hole 71 with an unthreaded inner wall and a locking screw hole 72 communicated with the dynamic pressure hole 71 along the length direction of the splicing plates 1, the inner wall of the locking screw hole 72 is provided with a thread (not shown in the figure) for connecting a locking screw to fix the splicing plates 1 and the bone, the hole wall of the dynamic pressure hole 71 is an inclined concave arc shape for eccentrically connecting a cortical screw to achieve the effect of pressing and fixing the splicing plates 1 to the bone, the dynamic pressure hole 71 on the first splicing plate 11 is opposite to the dynamic pressure hole 71 on the second splicing plate 12, so that the first splicing plate 11 and the second splicing plate 12 can simultaneously press the bone from the first splicing plate 11 and the second splicing plate 12.

The implementation principle of the embodiment is that when a bone plate fastener and a self-pressurizing minimally invasive locking bone fracture plate system containing the bone plate fastener are used for setting a bone on a fracture part of a patient, an incision is made on soft tissue of the patient wrapped outside the fracture bone according to the lengths of a first splicing plate 11 and a second splicing plate 12 until the periosteum of the fractured bone is broken, a guide part 5 of one splicing plate 1 extends into the soft tissue from the incision and passes through the fracture part, after the splicing plate 1 reaches a required position, the splicing plate 1 is pressurized and locked on the bone through an L CP (CP) combination hole 7, one end, far away from the guide part 5, of the other splicing plate 1 extends into the incision, so that a first pressurizing propulsion plate 111 is inserted into a splicing groove 1211, so that a connecting structure 2 is connected, at the moment, the rod part of the first positioning hole 1111 is close to the bone, the rod part of the first pressurizing propulsion plate 1 extends into the splicing plate 1 after being pushed by a resetting force required by the fracture part of the patient, the first pressurizing propulsion plate 111 is screwed into the splicing plate 1211, so that the insertion depth of the first pressurizing propulsion plate 111 in the splicing plate 1 in the splicing groove 1211 is changed, the first pressurizing propulsion plate 1 can drive the fractured bone to be capable of cutting the bone to be aligned to the correct position, until the rod part of the bone, the rod part, the first positioning plate 1111 is close to the first fastening plate 1111, when the first fastening plate is close to the first fastening plate 41, when the head of the first fastening plate is close to the first fastening plate 41, the first fastening plate 41, the first fastening plate is close to the first fastening plate, when the first fastening plate, the first fastening plate is close to the first positioning hole, the first fastening plate 41, when the first fastening plate is close to the first fastening plate.

Example 2:

referring to fig. 5, the present embodiment is different from embodiment 1 in that a stress relieving groove 6 is formed in the second splice plate 12 near the second pressing pusher plate 121, and the stress relieving groove 6 penetrates through the second splice plate 12 in the thickness direction of the second splice plate 12. The stress relief grooves 6 are used for dispersing stress concentrated at the connecting structure 2, and reduce the possibility that the bone fracture plate body is broken from the connecting structure 2 due to the fact that the stress at the connecting structure 2 is concentrated too much.

Example 3:

referring to fig. 6 and 7, the present embodiment is different from embodiment 1 in that a first pushing rack 1113 is provided on a surface of the first pressing and pushing plate 111 abutting against the insertion groove 1211, and the first pushing rack 1113 may be provided on a surface of the first pressing and pushing plate 111 abutting against a groove bottom of the insertion groove 1211 in the thickness direction, may be provided on side surfaces (not shown) of the first pressing and pushing plate 111 abutting against side walls of the insertion groove 1211 on both sides in the width direction, or may be provided on both the surface of the first pressing and pushing plate 111 abutting against the insertion groove 1211 in the thickness direction and the side surfaces (not shown). The first pushing racks 1113 are arranged in parallel in the length direction of the first splice plate 11, and the first pushing racks 1113 incline towards the direction away from the second pressing push plate 121 spliced with the second pushing rack 121 towards the surface of the second pressing push plate 121 arranged close to the first pushing racks.

Referring to fig. 7, a plurality of second pushing racks 1213 engaged with the first pushing racks 1113 are disposed in the insertion slot 1211, the second pushing racks 1213 may be disposed at the bottom of the insertion slot 1211, or at inner sidewalls (not shown) of the insertion slot 1211 on both sides in the width direction, or at both the bottom of the insertion slot 1211 and the walls (not shown) of the insertion slot 1211 on both sides in the width direction, and the second pushing racks 1213 are inclined toward a surface of the first pressing pushing plate 111 disposed close to the second pushing rack in a direction away from the first pressing pushing plate 111 assembled with the second pushing rack.

Referring to fig. 7, in the process of inserting the first pressurizing and pushing plate 111 into the insertion groove 1211 and gradually pressurizing and pushing, the first pushing rack 1113 and the second pushing rack 1213 are easily pushed in a row by row, so that the pressurizing power of the first pressurizing and pushing plate 111 can be limited, thereby preventing the situation of excessive pressurization at one time, and facilitating the medical staff to accurately select the pressurizing power of the bone plate according to clinical treatment. The first and second pushing

racks

1113, 1213 have a height of 0.5 mm, and when the plate is removed, the medical practitioner slightly lifts the first compression-lifting plate to disconnect the first and second pushing

racks

1113, 1213. The distance between two adjacent first pushing racks 1113 and the distance between two adjacent second pushing racks 1213 are both 0.06 mm, so that when the bone fracture plate body is pressurized and pushed into one rack, a 0.06 mm pressurizing unit can be generated, and the spliced pressurizing and locking bone fracture plate in the embodiment can realize the micro-pressurizing effect.

Example 4:

referring to fig. 8, the present embodiment is different from embodiment 1 in that three splice plates 1 are included, which are respectively a third splice plate 13 and two first splice plates 11 in embodiment 1, and the two first splice plates 11 are spliced at two ends of the third splice plate 13 in the length direction by the connecting structure 2 and the bone plate fastener in embodiment 1.

Referring to fig. 9, the second pressing and pushing plate 121 of example 1 is integrally formed at each of the two ends in the length direction of the third spliced plate 13, the second pressing and pushing plate 121 extends in the length direction of the third spliced plate 13, and the end surface of one end in the thickness direction of the second pressing and pushing plate 121 is flush with the end surface of one end in the thickness direction of the third spliced plate 13.

Referring to fig. 10, the surface of the second pressing and pushing plate 121 on the third splicing plate 13 for splicing with the first pressing and pushing plate 111 is provided with an insertion groove 1211 in embodiment 1 for inserting the first pressing and pushing plate 111 on the first splicing plate 11. The end portions of the two second pressing pushing plates 121 fixed to the third joint plate 13, which are away from each other, are both linear (not shown in the figure), and may also be both arc-shaped, which are outwardly protruded along the length direction of the third joint plate 13. The inner walls of the two insertion grooves 1211 formed in the third splicing plate 13 have a square shape (not shown) or a U shape that fits the outer periphery of the first pressure-feed plate 111.

Referring to fig. 10, the third splice plate 13 may be provided with L CP fastening holes 7 (not shown) in embodiment 1 as locking holes along its length direction, or may be provided with any hole pattern through which a bolt can be inserted to fix the third splice plate 13 to a bone as a locking hole, or may not be provided with any hole pattern, and preferably, the third splice plate 13 is provided with a waist-shaped hole in its middle portion as the locking hole, which is the same as the second positioning hole 1212 in embodiment 1, and the surfaces of the first pressing thrust plate 111 and the insertion groove 1211 abutting against each other in this embodiment may be smooth surfaces or rough surfaces (not shown) in embodiment 1, or may be provided with the first thrust rack 1113 and the second thrust rack 1213 in embodiment 3.

Example 5:

referring to fig. 11, the difference between this embodiment and embodiment 4 is that the stress relief groove 6 of embodiment 2 is formed in the middle of the third splice plate 13 between two splicing grooves 1211, and is used to disperse the stress concentrated on the joint of the third splice plate 13 and the other two splice plates.

Example 6:

referring to fig. 12, the difference between this embodiment and embodiment 1 is that three splice plates 1 are included, which are respectively a fourth splice plate 14, a first splice plate 11 in embodiment 1, and a second splice plate 12 in embodiment 1. The first splicing plate 11 is spliced at one end of the fourth splicing plate 14 in the length direction of the fourth splicing plate 14 through the connecting structure 2 and the bone plate fastener in the embodiment 1, and the second splicing plate 12 is spliced at one end of the fourth splicing plate 14 far away from the first splicing plate 11 in the length direction of the fourth splicing plate 14 through the connecting structure 2 and the bone plate fastener in the embodiment 1.

Referring to fig. 13, the first pressing and pushing plate 111 in example 1 is integrally formed at one end of the fourth splice plate 14 in the length direction, and the end surface of one end of the first pressing and pushing plate 111 in the thickness direction is flush with the end surface of one end of the fourth splice plate 14 in the thickness direction. The end of the fourth splice plate 14 remote from the first pressing and pushing plate 111 to which it is fixed is integrally formed with the second pressing and pushing plate 121 of embodiment 1.

Referring to fig. 14, the second pressing pushing plate 121 is provided with an insertion groove 1211 for inserting and matching with the first pressing pushing plate 111 adjacently disposed on the fourth splicing plate 14. The first pressing pushing plate 111 and the second pressing pushing plate 121 on the fourth splicing plate 14 are both elongated along the length direction of the fourth splicing plate 14. The end portions of the first pressing pushing plate 111 and the second pressing pushing plate 121, which are integrally connected with the fourth splicing plate 14, far away from each other are both linear (not shown in the figure), or both are arc-shaped, which protrude outwards along the length direction of the fourth splicing plate 14. The wall of the insertion groove 1211 on the fourth splicing plate 14 is fitted to the outer peripheral wall of the first pressing and pushing plate 111 in insertion fit, and is configured to be square (not shown) or arc according to the shape of the end of the first pressing and pushing plate 111 in insertion fit.

Referring to fig. 14, the fourth splicing plate 14 may be provided with L CP combination holes 7 in embodiment 1 as locking holes (not shown in the drawings) along the length direction thereof, may also be provided with any hole type for bolts to pass through so as to fix the fourth splicing plate 14 and the bone, and may also be provided with no hole, preferably, the fourth splicing plate 14 in this embodiment is provided with a waist-shaped hole in the middle thereof as the same as the second positioning hole 1212 in embodiment 1, and the surfaces of the first pressing pushing plate 111 and the insertion groove 1211 abutting against each other in this embodiment may be smooth surfaces or rough surfaces in embodiment 1, and may also be provided with the first pushing rack 1113 and the second pushing rack 1213 in embodiment 3.

Example 7:

referring to fig. 15, the difference between this embodiment and embodiment 6 is that the middle portion of the fourth splicing plate 14 in the length direction is provided with the stress relief groove 6 in embodiment 2, which is used to disperse the stress concentrated at the joint of the fourth splicing plate 14 and the other two splicing plates.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A bone plate fastener characterized by: the novel toothbrush comprises a head part (3) and a rod part (4), wherein the head part (3) is fixedly connected to one axial end of the rod part (4);

the rod part (4) comprises a front section (41) and a rear section (42), the front section (41) is arranged close to the head part (3), a front thread section (411) used for being in threaded connection with a bone plate is arranged on the periphery of the front section (41), a rear thread section (421) used for being in threaded connection with a bone is arranged on the periphery of the rear section (42), and the thread pitches of the front thread section (411) and the rear thread section (421) are equal.

2. The bone plate fastener of claim 1, wherein: one end of the rear section (42) far away from the head (3) is tapered in a pointed cone shape to form a self-tapping end (422).

3. A bone plate fastener as claimed in claim 2, wherein: the self-tapping end (422) is obliquely provided with a self-tapping groove (423).

4. A self-pressurizing minimally invasive locking bone plate system containing a bone plate fastener is characterized in that: the bone plate fastener comprises at least two splicing plates (1) and the bone plate fastener as claimed in any one of claims 1 to 3, wherein each splicing plate (1) is provided with a locking hole, the ends of two adjacent splicing plates (1) close to each other are connected with each other through a connecting structure (2) to form a bone plate body, the connecting structure (2) comprises a first positioning hole (1111) and a second positioning hole (1212), the first positioning hole (1111) and the second positioning hole (1212) are respectively located at the ends of two adjacent splicing plates (1) close to each other, when the splicing plates (1) are fixed with bones, the first positioning hole (1111) is arranged close to the bones, the orthographic projection of the first positioning hole (1111) is located in the second positioning hole (1212), the aperture of the second positioning hole (1212) is gradually reduced along the direction close to the first positioning hole (1111), bone plate fastener head (3) orientation pole portion (4) are the convergent trend, and the bone plate fastener passes in proper order second locating hole (1212) with first locating hole (1111), head (3) of bone plate fastener towards pole portion (4) one side the lateral wall with the pore wall of second locating hole (1212) supports tightly, preceding screw thread section (411) and the pore wall threaded connection of first locating hole (1111), back screw thread section (421) and skeleton threaded connection.

5. The self-pressurizing minimally invasive locking bone plate system with bone plate fasteners of claim 4, wherein: connection structure (2) still include first pressurization propulsion board (111) and second pressurization propulsion board (121), first pressurization propulsion board (111) with second pressurization propulsion board (121) fixed connection respectively in two adjacent splice plate (1) one end that is close to each other, just first locating hole (1111) are located on first pressurization propulsion board (111), second locating hole (1212) are located on second pressurization propulsion board (121), adjacent two when splice plate (1) amalgamation, first pressurization propulsion board (111) with the terminal surface that second pressurization propulsion board (121) thickness direction kept away from each other respectively with two terminal surface parallel and level of coaptation board body thickness direction.

6. The self-pressurizing minimally invasive locking bone plate system with bone plate fasteners of claim 5, wherein: an insertion groove (1211) for inserting the first pressurizing and pushing plate (111) is formed in the second pressurizing and pushing plate (121), the second positioning hole (1212) is located in the insertion groove (1211), and when the first pressurizing and pushing plate (111) is inserted into the insertion groove (1211), the outer periphery of the first pressurizing and pushing plate (111) is attached to the inner groove wall of the insertion groove (1211).

7. The self-pressurizing minimally invasive locking bone plate system with bone plate fasteners of claim 6, wherein: when the first pressurizing and pushing plate (111) is plugged with the plugging groove (1211), the end area of one surface, facing the bottom of the plugging groove (1211), of the first pressurizing and pushing plate (111) in the thickness direction is smaller than the end area of one surface, facing away from the bottom of the plugging groove (1211), of the first pressurizing and pushing plate, and the two end surfaces of the first pressurizing and pushing plate (111) in the thickness direction are connected through an inclined surface (1112).

8. The self-pressurizing minimally invasive locking bone plate system with bone plate fasteners of claim 6, wherein: the surface of the first pressurizing and pushing plate (111) abutting against the insertion groove (1211) is provided with a concave-convex surface.

9. The self-pressurizing minimally invasive locking bone plate system with bone plate fasteners of claim 8, wherein: the surface of the first pressurizing and pushing plate (111) abutted to the insertion groove (1211) is provided with first pushing racks (1113), the first pushing racks (1113) are arranged in parallel in the length direction of the splice plates (1) fixed with the first pressurizing and pushing plate (111), and the first pushing racks (1113) incline towards the direction away from the splice plates (1) close to the first pushing racks (1113) towards the surface of the splice plates (1) close to the first pushing racks;

a plurality of second pushing racks (1213) which are meshed with the first pushing racks (1113) are arranged in the inserting groove (1211), and the second pushing racks (1213) incline towards the direction away from the splicing plate (1) close to the second pushing rack (1213) towards the splicing plate (1) close to the second pushing rack.

10. The self-pressurizing minimally invasive locking bone plate system with bone plate fasteners of claim 6, wherein: one end of the first pressurizing and pushing plate (111), which is far away from the splicing plate (1) fixed with the first pressurizing and pushing plate, is linear or arc-shaped, and the wall of the inserting groove (1211) is square or U-shaped and is matched with the end of the first pressurizing and pushing plate (111);

the end part of the second pressurizing and pushing plate (121) far away from the splicing plate (1) fixed with the second pressurizing and pushing plate is linear or arc-shaped, and one end of the splicing plate (1) for splicing the second pressurizing and pushing plate (121) is linear or arc-shaped and is matched with the shape of the end part of the second pressurizing and pushing plate (121).