CN102920501B - Metal bone fracture plate with stress dispersing structure - Google Patents

Abstract

The invention discloses a metal osteosynthesis plate with a stress dispersion structure, which comprises a bone screw hole arranged on the osteosynthesis plate, and a plurality of screw holes distributed along the periphery of the bone plate are arranged on the plate surface of the bone bone plate. The top wires are respectively provided inside, and the head of the top wire is provided with an inner hexagonal groove. There are multiple radial opening grooves at the end of the top wire, and the opening grooves are connected with the bottom of the inner hexagonal groove on the head of the top wire. This invention does not need to change the overall structure of the product, but only needs to increase the stress point of the metal bone plate. There are also a variety of top wires with different lengths, which can be selected according to specific conditions to meet the requirements of osteosynthesis. The invention can effectively disperse the stress, prevent the fracture of the metal bone plate due to uneven force, and reduce the pain and economic loss of patients caused by the fracture of the bone plate; the process is simple and the operation is convenient for doctors.

Description

Metal bone plate with stress distributing structure

technical field

The invention relates to a metal bone plate structure, in particular to a metal bone plate with a stress dispersion structure.

Background technique

Metal bone plate is a bone-engaging implant used for fracture connection during fracture surgery. Due to the different shapes of human bones and irregular surfaces, the uniform contact between the surface of the bone and the surface of the bone plate cannot be effectively formed when the bone plate is used to connect, resulting in the formation of stress points on the bone plate. For femur, tibia, fibula, humerus, ulna For metal bone plates used in fracture operations such as the radius, during the postoperative recovery period, due to excessive torque and uneven force on the metal bone plates, a certain number of bone plates may break from time to time, and a second operation is required. Make patients bear physical pain and economic loss.

Contents of the invention

In view of the above-mentioned prior art, in order to solve the defects of the existing metal bone plate structure, the present invention provides a metal bone plate with a stress dispersion structure, without changing the overall structure of the product, increasing the stress point of the metal bone plate, which can effectively It eliminates the generation of stress and prevents the metal bone plate from breaking due to uneven force. It is simple to process and easy for doctors to operate.

In order to solve the above-mentioned technical problems, the technical scheme realized by the metal bone plate with stress dispersion structure of the present invention is: comprising bone screw holes arranged on the bone plate, and the plate surface of the bone plate is provided with multiple holes evenly distributed along the periphery. a jackscrew screw hole, and a jackscrew is arranged in the jackscrew screw hole.

In the anti-fracture metal bone plate of the present invention, the head of the top wire is provided with an inner hexagonal groove. The outer rotary surface of the top wire is provided with an annular groove, and a plurality of radial opening grooves are arranged from one side of the annular groove to the tail of the top wire, and the radial opening grooves are all connected with the inner hexagon The groove runs through. The number of the plurality of radial opening slots is four. A plurality of radial opening grooves are evenly distributed in the radial direction.

Compared with the prior art, the beneficial effect of the present invention is that a jackscrew structure is set on the bone plate, and when the metal bone plate of the present invention is used, the jackscrews in a plurality of jackscrew screw holes are respectively tightened with the bone, each with The jackscrew matched with the screw hole of the jackscrew forms a multi-point support between the bone plate and the bone, that is, the bone plate and the bone surface have multiple points of contact, which eliminates or disperses the stress concentration problem at the contact point between the bone plate and the bone, thereby Uniform stress on the bone plate can effectively reduce the possibility of bone plate fracture in the future, reduce the pain of patients caused by bone plate fracture, and avoid economic losses.

Description of drawings

Figure 1-1 is a schematic structural view of the anti-fracture metal bone plate of the present invention;

Figure 1-2 is a top view of the anti-fracture metal bone plate shown in Figure 1-1;

Fig. 2-1 is the top view of the jack wire embodiment one in the present invention;

Figure 2-2 is an axial full sectional view of the top wire shown in Figure 2-1;

Fig. 2-3 is the schematic diagram of the three-dimensional structure of the top wire embodiment one in the present invention;

Figure 3-1 is a top view of the first embodiment of the top wire in the present invention;

Figure 3-2 is an axial full sectional view of the top wire shown in Figure 3-1;

Fig. 3-3 is a three-dimensional structure schematic diagram viewed obliquely from above in Embodiment 2 of the top wire in the present invention;

Fig. 3-4 is the three-dimensional structural schematic diagram of the top wire embodiment 2 in the present invention observed obliquely below;

Fig. 4 is a schematic diagram of the use state of the anti-fracture metal bone plate of the present invention.

In the figure: 1-Bone plate, 2-Top screw, 3-Top screw screw hole, 4-Inner hexagonal groove, 5-Open groove, 6-Ring groove, 7-Bone screw hole, 8-Bone screw, 9 - Bone plates, 10 - Bones.

Detailed ways

The present invention will be further described in detail below in combination with specific embodiments.

As shown in Fig. 1-1, Fig. 1-2 and Fig. 4, the metal bone plate with stress dispersion structure of the present invention includes a bone screw hole 7 arranged on the bone plate 1, the shape and structure of the bone screw hole 7 It is not limited, and can be any one of eight-shaped holes, threaded holes, round holes and oblong holes, and the oblong holes are shown in Fig. 1-2; A plurality of jacking screw holes 3 are provided with jacking screws 2 in the jacking screw holes 3 . When in use, after the position of the bone plate 1 is arranged, according to the gap between the bone plate 1 and the bone 10 to be connected, a jackscrew 2 of an appropriate length is selected, and the jackscrew 2 is respectively screwed into the jackscrew screw hole 3, and then passed Each top wire 2 is in contact with the surface of the bone, so that the bone plate 1 is evenly stressed, effectively avoiding the postoperative contact point between the bone plate and the connected bone from becoming a stress concentration point, and preventing the bone plate from breaking under the action of stress concentration.

The head of the jacking screw 2 is provided with a screwdriver mouth or an inner hexagonal groove 4, and the screwdriver mouth can be straight or cross-shaped. Fig. 2-1, Fig. 2-2 and Fig. 2-3 show the structure of the first embodiment of the top wire, that is, the structure of the top wire whose head is an inner hexagonal groove 4. During the operation, the doctor uses a hexagonal wrench to screw the top screw 2 into the top screw hole 3, and each top screw 2 is tightened on the surface of the bone under the bone plate to form a multi-point support, eliminating or dispersing the bone plate and the bone. The problem of stress concentration at the contact point, so that the bone plate is evenly stressed.

In order to avoid loosening of the top wire in the future, Fig. 3-1, Fig. 3-2, Fig. 3-3 and Fig. 3-4 show the structure of the second embodiment of the top wire that prevents the top wire from loosening, that is, the top wire The head of the wire 2 is provided with an inner hexagonal groove 4, and the outer turning surface of the top wire 2 is provided with an annular groove 6, and from one side of the annular groove 6 to the tail of the top wire 2, multiple There are two radial opening grooves 5, and the radial opening grooves 5 are all connected with the inner hexagonal groove 4. During the operation, the doctor screws in the top wire 2 and makes it contact with the bone surface below the bone plate, and then applies an axial force to the top wire 2 with a tool. Since the strength of the part with the annular groove 6 is weak and the ring Evenly distributed radial opening grooves 5 are arranged below the groove 6, and "multi-claws" are formed at the tail of the top wire 2. Under the action of the axial force, the "claws" at the tail of the top wire 2 deform and open respectively. So as to achieve the effect of fixing the top wire in the axial direction, avoid the phenomenon of loosening or falling off of the top wire during the patient's rehabilitation activities (or in the future life and production process), and ensure the normal use of the bone plate.

Because in the specific operation, the gap between the metal bone plate and the bone is different when connecting different parts of the bone or different receptors, therefore, the top wire 2 described in the anti-break metal bone plate of the present invention has a variety of different lengths. The specifications can be selected according to the specific situation to meet the requirements of osteosynthesis.

Fig. 4 shows the use state of the anti-fracture metal bone plate of the present invention. First, the bone plate 9 and the bone 10 are fixed with the bone screw 8, and the top to the bottom of each top screw hole on the bone plate 9 is measured with a depth gauge. The depth between the surface of the bone 10, according to the measured depth, select the corresponding length of the top screw 2, and use the hexagonal wrench instrument to screw each top screw 2 into the screw hole of the top screw respectively until the top screw reaches the surface of the bone. In addition, be sure to All jackscrew screw holes must be respectively implanted with jackscrews, and cannot be missed, thereby forming a multi-point support between the bone plate 9 and the connected bone 10, eliminating or dispersing the stress at the contact point between the bone plate 9 and the bone 10 Concentrate the problem so that the plate is evenly stressed.

Although the present invention has been described above in conjunction with the drawings, the present invention is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive. Under the inspiration, many modifications can be made without departing from the gist of the present invention, and these all belong to the protection of the present invention.

Claims (6)

1. A metal bone plate with a stress dispersion structure, comprising bone screw holes (7) arranged on the bone plate (1), characterized in that: the plate surface of the bone plate (1) is provided with A plurality of jacking screw holes (3) are distributed, and each jacking screw hole (3) is respectively provided with a jacking screw (2), and the screw-in end of each jacking screw (2) is in contact with the surface of the bone, Thus, the bone plate (1) is evenly stressed. 2. The metal bone plate with stress dispersion structure according to claim 1, characterized in that: the head of the jacking wire (2) is provided with an inner hexagonal groove (4). 3. The metal bone plate with stress dispersion structure according to claim 1, characterized in that: the head of the jacking screw (2) is provided with a screwdriver opening, and the screwdriver opening is in the shape of a straight line or a cross. 4. The metal osteosynthesis plate with stress dispersion structure according to claim 2, characterized in that: an annular groove (6) is provided on the outer turning surface of the top wire (2), and from the annular groove (6) A plurality of radial opening grooves (5) are provided from one side of the top wire (2) to the tail of the jacking wire (2), and the radial opening grooves (5) are all connected with the inner hexagonal groove (4). 5. The metal osteosynthesis plate with stress dispersion structure according to claim 4, characterized in that the number of radial opening grooves (5) is four. 6. The metal bone plate with stress dispersion structure according to claim 3 or 4, characterized in that: a plurality of radial opening grooves (5) are evenly distributed in the radial direction.