CN104814783B - Locked pressurized bone plate - Google Patents

Abstract

Locked pressurized bone plate, for solving the problems, such as existing locked pressurized bone plate processed complex.Five mounting holes being sequentially arranged are provided with bone plate body, the first swivel nut is provided with centrally located mounting hole, forcing screw is provided with the first swivel nut；The second swivel nut is provided with remaining four mounting hole, pressurization multi-directional ball is respectively equipped with the second swivel nut positioned at high order end and low order end, forcing screw is provided with multi-directional ball of pressurizeing；Locking multi-directional ball is provided with the second swivel nut between per two adjacent forcing screws, screw thread is provided with lock-screw in multi-directional ball is locked.The bone plate, the requirement when setting for multi-directional ball of pressurizeing can meet to pressurize to angle, lock the requirement to angle when the setting of multi-directional ball can meet to lock.The present invention, it is easy to process, it is only necessary to five screwed holes are processed on bone plate body, avoid complexity when the overlapping pressurization hole of processing and locking hole.

Description

locking compression plate

technical field

The invention relates to the technical field of medical instruments, in particular to a bone plate.

Background technique

Traditional locking bone plates usually only have locking threaded holes and no pressure screw holes, which is not conducive to bearing tangential pressure, especially for osteoporosis patients, which will cause bone movement of fracture, which is very unfavorable for the recovery of the patient's condition. Even though the bone plate with compression screw holes has appeared now, 1/4 of the locking threaded holes and the compression threaded holes of the bone plate with compression screw holes that appear now overlap, so that the screw holes The processing of the bone plate brings difficulty, and the bone plate needs to have a certain angle when it is fixed with the bone, which requires pre-measurement before machining the threaded hole of the bone plate, so that the processing brings a certain degree of difficulty. difficult and difficult to guarantee accuracy.

Contents of the invention

The purpose of the present invention is to provide a locking and pressurized bone plate, which is used to solve the problem of complicated processing of the existing locked and pressurized bone plate.

The technical solution adopted by the present invention to solve the technical problem is: lock the pressurized bone plate, including the bone plate body, which is characterized in that five installation holes arranged in sequence are arranged on the bone plate body, and the A first screw sleeve is provided in the installation hole of the first screw sleeve, and a pressure screw is provided in the first screw sleeve; a second screw sleeve is provided in the remaining four installation holes, and the second screw sleeve at the leftmost and rightmost ends There are respectively pressurized universal balls in the sleeves, and a first through hole is arranged on the pressurized universal balls, the inner wall of the first through holes is smooth and a pressurized screw is arranged in the first through holes; A locking universal ball is arranged in the second threaded sleeve between two adjacent pressure screws, and a second through hole is arranged in the locking universal ball, and a screw thread is installed in the second through hole. Lock the screws.

Further, the five installation holes are arranged at equal intervals.

Further, the mounting holes are threaded holes.

Further, the first screw sleeve and the second screw sleeve located in the installation hole are both circular metal parts, and external threads are provided on the outer walls of the first screw sleeve and the second screw sleeve.

Further, screw holes are provided on the first screw sleeve, and compression screws are installed in the screw holes.

Further, a universal ball hole is provided on the second screw sleeve, and a pressurized universal ball or a locking universal ball is arranged in the universal ball hole.

The beneficial effects of the present invention are: the locking and pressurizing bone plate provided by the present invention can apply pressurizing screws as required, the setting of the pressurizing universal ball can meet the angle requirements during pressurization, and the setting of the locking universal ball can Meet the angle requirements when locking. The invention is easy to process, and only needs to process five threaded holes on the bone plate body, avoiding the complexity of processing overlapping pressurizing holes and locking holes.

Description of drawings

Fig. 1 is one of three-dimensional figure of the present invention;

Fig. 2 is the second three-dimensional figure of the present invention;

Fig. 3 is a three-dimensional view of the bone plate body;

Fig. 4 is the three-dimensional figure of pressure universal ball;

Fig. 5 is the three-dimensional diagram of locking universal ball;

Fig. 6 is the three-dimensional diagram of the second screw sleeve;

Figure 7 is a side view of Figure 6;

Fig. 8 is a three-dimensional view of the first screw sleeve;

Figure 9 is a top view of Figure 8;

Figure 10 is a schematic cross-sectional view of Figure 1;

In the figure: 1 bone plate body, 11 mounting hole, 2 first screw sleeve, 21 screw hole, 3 second screw sleeve, 31 universal ball hole, 41 compression screw, 42 locking screw, 5 external thread, 6 pressure Universal ball, 61 first through holes, 7 locking universal balls, 71 second through holes.

detailed description

The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 3 , the bone plate body 1 is a strip-shaped metal plate, and five mounting holes 11 arranged at equal intervals are arranged on the bone plate body, and the mounting holes are threaded holes. In the threaded hole in the middle, the first screw sleeve 2 is threadedly installed, as shown in Figure 8 and Figure 9, the first screw sleeve 2 is a circular metal piece, and the center of the first screw sleeve is provided with a screw hole 21, An external thread 5 is provided on the outer wall of the first screw sleeve, and a compression screw 41 is installed in the screw hole. A second screw sleeve 3 is arranged in the mounting holes at the leftmost and rightmost ends, as shown in Figure 6 and Figure 7, the second screw sleeve is a circular metal piece, and a universal joint is provided at the center of the second screw sleeve. Ball hole 31, the inner wall of universal ball hole is smooth and is used for installing pressure universal ball 6, and the outer wall of the second screw sleeve is provided with external thread 5, to facilitate the connection of the second screw sleeve and the mounting hole. As shown in Figure 4, the upper and lower end faces of the pressure universal ball 6 are parallel, and the side of the pressure universal ball is a spherical surface, and the first through hole 61 is provided on the pressure universal ball, and the first through hole 61 is installed in the first through hole. Compression screw 41. In the mounting holes between every adjacent two pressure screws, a second screw sleeve 3 is also threaded, and a locking universal ball 7 is installed in the second screw sleeve, as shown in Figure 5, the locking universal ball 7 The upper and lower ends of the ball are parallel, and the side of the locking universal ball is a spherical surface. A second through hole 71 is provided at the center of the locking universal ball, and a locking screw 42 is installed in the second through hole.

As shown in Fig. 1, Fig. 2 and Fig. 10, five installation holes are arranged on the bone plate body, and a first screw sleeve is arranged in the middle installation hole, and a compression screw is installed in the first screw sleeve. Second screw sleeves are arranged in the remaining four mounting holes, pressure universal balls are installed in the second screw sleeves at both ends, and pressure screws are installed in the pressure universal balls. Locking universal balls are installed in the two second screw sleeves in the middle, and locking screws are installed in the locking universal balls.

When the vertical angle is pressurized, the first screw sleeve is screwed into the mounting hole in the middle of the bone plate body. There is no internal thread on the first through hole on the first screw sleeve, and then the compression screw is directly screwed in. Note that the contact between the compression screw and the bone plate body is not threaded, it is only used for compression rather than for fixation.

When the compression screw needs to be screwed in at a certain angle due to the limitation of the bone structure, it is necessary to apply the universal joint structure device, which is composed of two second screw sleeves screwed in from the mounting hole of the bone plate body and the second The pressurized universal ball wrapped by the screw sleeve is composed of the pressurized universal ball, which can rotate freely in the second screw sleeve, so as to meet the requirements of different angles. The inner wall of the first through hole on the pressurized universal ball is smooth. Used to withstand stress.

When the locking screw needs to be screwed in at an angle due to the limitation of the bone structure, it is necessary to apply another universal joint structure device, which is composed of two second threaded sleeves screwed in from the mounting holes of the bone plate body and the second screw sleeve. The locking universal ball wrapped by two screw sleeves, the locking universal ball can rotate freely in the second screw sleeve, so as to meet the requirements of different angles, the second through hole on the locking universal ball has an inner Thread, and one end of the first through hole is provided with a chamfer, and the chamfer position is also threaded and cooperates with the thread of the top cap end of the locking screw to play a locking role.

Because the shape of the bone varies from person to person, in order to make the bone plate body fit the human bone better, a special manufacturing process is required when making the bone plate body:

A. Data acquisition, collecting digital imaging data of bones;

B. Modeling, establishing a three-dimensional model of the bone plate, and obtaining the contour data of the three-dimensional model of the bone plate;

C. Modify the established three-dimensional model (since the bone image is collected on the basis of the damaged bone, the bone plate model established in this way will have a certain deviation from the appropriate bone plate model, which is We need to artificially modify the 3D model of the bone plate to the appropriate position);

D. Instruction conversion, design of processing instructions for CNC processing equipment;

E. The bone plate is formed, and the numerical control processing equipment uses the rapid prototyping technology to prepare the bone plate according to the processing instructions;

F. The bone plate is clamped and automatically punched and tapped;

G. Bone plate deburring and disinfection.

Claims (5)

1. Locking and pressurizing the bone plate, including the bone plate body, characterized in that five mounting holes arranged in sequence are arranged on the bone plate body, and a first screw sleeve is provided in the mounting hole at the middle position, A pressure screw is provided in the first screw sleeve; a second screw sleeve is provided in the remaining four mounting holes, and a universal ball hole is provided on the second screw sleeve, and a universal ball hole is provided in the universal ball hole A pressurized universal ball or a locking universal ball is provided in the middle, and a pressurized universal ball is respectively provided in the second screw sleeves located at the leftmost and rightmost ends, and a first A through hole, the inner wall of the first through hole is smooth and a pressure screw is provided in the first through hole; a locking universal ball is arranged in the second screw sleeve between every two adjacent pressure screws, and the A second through hole is provided in the locking universal ball, and a locking screw is threadedly installed in the second through hole. 2. The locking and compression bone plate according to claim 1, wherein the five mounting holes are arranged at equal intervals. 3. The locking and pressurizing bone plate according to claim 2, wherein the mounting hole is a threaded hole. 4. The locking compression bone plate according to claim 3, characterized in that, the first screw sleeve and the second screw sleeve located in the installation hole are both circular metal parts, and the first screw sleeve and the outer wall of the second screw sleeve is provided with external threads. 5. The locking and compression bone plate according to claim 4, wherein a screw hole is provided on the first screw sleeve, and a compression screw is installed in the screw hole.