CN214966501U

CN214966501U - Pressurization patella locking plate

Info

Publication number: CN214966501U
Application number: CN202023232197.1U
Authority: CN
Inventors: 李洪瀚; 林达生; 沈佳祚; 陈惠敏
Original assignee: Double Medical Technology Inc
Current assignee: Double Medical Technology Inc
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-12-03
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to a pressurization patella lockplate. The patella plate comprises a patella plate body, wherein the inner contour of the patella plate body is in anatomical fit with the outer contour of a patella; the patellar plate body is divided into a central part and a peripheral part connected with the edge of the central part; the central part is in a square shape and is provided with a plurality of shaft holes; the peripheral portion includes a sub-connection piece connected to the central portion and selectively separable from the central portion, and an end of each sub-connection piece is provided with a sub-shaft hole. Compared with the prior art, the utility model has the advantages that: 1. the utility model discloses a design of appearance is dissected according to the patella to the whole appearance of patella lockplate, can provide the stable fixed of the comminuted fracture of patella, need not to bend moulding again in the art. 2. The shaft holes in the central part of the patella locking plate are arranged in parallel to form a square net-shaped design, the coverage area is large, and the minor severe comminuted fracture of the patella fracture block can be effectively fixed.

Description

Pressurization patella locking plate

Technical Field

The utility model relates to the field of medical equipment, especially a pressurization patella lockplate.

Background

The patella is the largest seed bone of the human body, is positioned in the tendon of the quadriceps femoris, has an approximately triangular appearance, has the function of protecting the knee joint, and is an important structure in the activity of the lower limbs. Patellar fracture belongs to intra-articular fracture, is usually caused by violent injury, and is often seen in young and middle-aged patients. Rock wood typing can be divided into the following categories: type I, no obvious displacement occurs after fracture, the fracture is the same as the fracture without displacement, or the fracture part is the lower pole position of patella, and no influence is caused on the articular surface; type II, fracture across, the patella is divided into two parts after fracture, which have oblique, longitudinal and transverse shapes, large displacement occurs after fracture, and the fracture part is in the middle of the patella; type III, the fracture part of which is at the lower pole or lower part of the patella, and the patella is divided into a plurality of pieces; type IV, comminuted fracture, no displacement after fracture; v type, displacement type comminuted fracture, and displacement distance > 5 mm; VI, the fracture type is vertical, and the fracture line is longer; type vii, osteochondral fractures. The incidence rate of patellar comminuted fracture accounts for about 40% of the incidence rate of all patellar fractures, and is a common fracture type in clinic. The difficulty of treating comminuted fracture of patella is high, because besides anatomical reduction of the fractured end of the patient, the stability and tensile force action of the patella are reconstructed, so that the functional exercise of knee joint and quadriceps femoris is performed as early as possible, and the patella is promoted to be recovered as early as possible. Early treatment of comminuted patella fractures was mainly recommended for total patella resections, but after patella resections patients had difficulty reaching the final 10 ° -15 ° knee extension and were unstable when flexed, which operation has been largely abandoned at present. Clinically, various attempts have been made to preserve the intact patella as much as possible. Currently, the treatment of patella is as follows: 1. the steel wire is used for fixing and treating, the steel wire is used for surrounding the patella to be fixed and sewed, so that the patella is kept stable, and the defect is that the steel wire is easy to break. 2. The tension band fixation treatment is the most common fixation mode for patellar fracture, but is also insufficient, and the tension band easily causes local internal fixation pain because the patellar position is positioned under the skin in a shallow position. 3. The nickel-titanium memory alloy patellar concentrator is fixed, and is combined with the lateral direction through longitudinal combination for use, so that the patellar concentrator is firmly hung on the lower edge of a patella of a patient, hot saline gauze is required to carry out hot compress on the patellar concentrator to realize pressurization internal fixation, and the patellar concentrator is suitable for transverse fracture of the patella but is not suitable for small serious comminuted fracture of a patellar block. Therefore, the fixing of the patellar fracture of the comminuted small bone pieces is still insufficient clinically; anatomically, the patella is directly under the skin, which requires the insert to maintain a low cut to reduce wound irritation. Meanwhile, the patella fracture belongs to intra-articular fracture, strong fixation of anatomical reduction is required, and on the premise of ensuring the strong fixation of the patella fracture, how to ensure the strength of the internal fixation is still the difficult point and key point of the current research. Relevant biomechanical studies find that the multi-angle steel plate fixing strength is superior to that of a tension band combined hollow nail, but only the basket-shaped steel plate and the X-shaped locking plate for treating patella lower extreme fracture are clinically reported, the fixing effect is enhanced by surrounding a suture, and other reports related to patella steel plates are not available for a while.

Disclosure of Invention

The utility model aims to provide a: provides a pressurizing patella locking plate which has the characteristics of large coverage area, easy shaping and the like.

The utility model discloses a following technical scheme realizes: the pressurizing patella locking plate comprises a patella plate body 1, wherein the inner contour of the patella plate body 1 is anatomically fitted with the outer contour of a patella; the patella plate body 1 is divided into a central part 11 and a peripheral part 12 connected to the edge of the central part 11; the central part 11 is square, and the central part 11 is provided with a plurality of shaft holes 111;

the peripheral portion 12 includes sub-coupling pieces 121 coupled to the central portion 11 and selectively separable from the central portion 11, and an end of each sub-coupling piece 121 is provided with a sub-shaft hole 122.

Compared with the prior art, the utility model has the advantages that:

1. the utility model discloses a design of appearance is dissected according to the patella to the whole appearance of patella lockplate, can provide the stable fixed of the comminuted fracture of patella, need not to bend moulding again in the art. 2. The shaft holes in the central part of the patella locking plate are arranged in parallel to form a square net-shaped design, the coverage area is large, and the minor severe comminuted fracture of the patella fracture block can be effectively fixed. The patella locking plate is designed in an integrated mode, and the peripheral part protruding on the periphery can be partially or integrally cut to adapt to different patients. 4. Under the stable prerequisite of assurance, the connection piece or vice connection piece quantity reduction of adoption is being guaranteed in the shaft hole and the counter shaft hole of patella lockplate, and then has improved the fretwork area of patella lockplate, and the fretwork design is convenient for fixed and postoperative observation fracture healing condition in the art. 5. The pressurizing patella locking plate is fixed on the patella through the arrangement of the shaft hole and the auxiliary shaft hole and the combination screw, so that an inner support effect is provided for the patella, a firm bone plate-bone interface is provided, and meanwhile, the large-area hollow is beneficial to protecting the blood circulation of the periosteum; the cooperation screw multi-angle is fixed, and the design of the type is dissected to the arc, can effectively fix the broken bone piece of little bone is smashed to the patella, can realize early rehabilitation training, helps resumeing the function of knee joint. 6. The locking plate has an ultrathin thickness of 1.3mm, and the subcutaneous foreign body sensation is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a schematic view of the patella placement structure of the present invention;

fig. 4 is an effect diagram of the screw fixing on the patella of the present invention.

Description of reference numerals: 1, a patella plate body, 11 central parts, 111 shaft holes, 112 connecting pieces, 113 hollows, 12 peripheral parts, 121 auxiliary connecting pieces, 122 auxiliary shaft holes, 2 screws and 3 patellas.

Detailed Description

The invention is explained in detail below with reference to the accompanying drawings:

as shown in fig. 1-2: the pressurizing patella locking plate comprises a patella plate body 1, wherein the inner contour of the patella plate body 1 is anatomically fitted with the outer contour of a patella; the patella plate body 1 is divided into a central part 11 and a peripheral part 12 connected to the edge of the central part 11; the central part 11 is square, and the central part 11 is provided with a plurality of shaft holes 111;

The overall shape of the patella locking plate is designed according to the anatomical shape of the patella, so that the patella comminuted fracture can be stably fixed without bending and shaping in the operation. The shaft holes in the central part of the patella locking plate are arranged in parallel to form a square net-shaped design, the coverage area is large, and the minor severe comminuted fracture of the patella fracture block can be effectively fixed.

The utility model discloses a design of appearance is dissected according to the patella to the whole appearance of patella lockplate, can provide the stable fixed of the comminuted fracture of patella, need not to bend moulding again in the art. 2. The shaft holes in the central part of the patella locking plate are arranged in parallel to form a square net-shaped design, the coverage area is large, and the minor severe comminuted fracture of the patella fracture block can be effectively fixed.

The shaft holes 111 are arranged in a rectangular array and are positioned in the shaft holes 111 at the edge of the central part 11, and any two adjacent shaft holes 111 are connected through a strip-shaped connecting piece 112; the shaft hole 111 is positioned at the non-edge of the central part 11 and is connected with the adjacent shaft hole 111 through a transverse connecting piece 112; so that the remaining area of the central portion 11 forms an opening 113.

The number of the shaft holes 111 is at least 12, the number of the shaft holes 111 in each row is three, and the number of the shaft holes 111 in each column is four.

The sub-coupling piece 121 is coupled to the shaft hole 111 at the edge of the central portion 11.

The shaft holes 111 at two sides of the edge of the central part 11 are connected with auxiliary connecting sheets 121; the shaft holes 111 on the upper and lower sides of the edge of the central portion 11 are alternately connected with secondary connecting pieces 121 in a staggered manner. Design like this can make the whole outline of this body of patella board present trapezoidally, because the patella outward appearance is approximate triangle-shaped, the coverage patella that present trapezoidal patella board body can be better.

The thickness of the patellar plate body 1 is 1.3 +/-0.1 mm; generally, 1.3mm is preferable, and such a thickness can reduce the feeling of foreign matter under the skin.

As shown in fig. 3 and 4: the fracture of the patella is a clinically complex fracture type, and after the fracture of the patella, the knee stretching function of the patella is lost or the patella joint is potentially disordered, so that the pain of the knee joint and the movement dysfunction are easily caused, and the work and the life of a patient can be seriously influenced. Whether the knee extension device is complete is an important surgical indication of patellar fracture. The main purpose of surgical treatment of patellar fracture is to keep the joint plane smooth, recover the function of a knee extension device and avoid traumatic arthritis. The treatment method of the patellar fracture is gradually improved, but the treatment difficulty of the comminuted patellar fracture is higher, because the anatomical reduction of the fractured end of the patient is required, and the stability and tensile force action of the patella are also required to be reconstructed, so that the functional exercise of the knee joint and the quadriceps femoris is performed as early as possible, and the early rehabilitation is promoted. In the past, traditional open reduction tension band steel wire internal fixation was used to treat the disease clinically. However, it is difficult to establish a stable patellar structure for the patient, which affects the functional exercise of the knee joint after the operation. The utility model discloses a special shaft hole design is together fixed with screw and patella lockplate, provides the inner support effect, has both provided firm patella lockplate-bone interface, helps protecting the blood circulation of periosteum again. The screw multi-angle is fixed, and the design of the arc anatomical form can effectively fix the broken bone piece of patella reduction, can realize early rehabilitation training, helps recovering knee joint's function.

While the present invention has been shown and described with reference to particular embodiments and alternatives thereof, it will be understood that various changes and modifications can be made without departing from the spirit and scope of the invention. It is understood, therefore, that the invention is not to be limited, except as by the appended claims and their equivalents.

Claims

1. Pressurization patella lockplate, its characterized in that: the patellar plate comprises a patellar plate body (1), wherein the inner contour of the patellar plate body (1) is anatomically fitted with the outer contour of the patella; the patellar plate body (1) is divided into a central part (11) and a peripheral part (12) connected to the edge of the central part (11); the central part (11) is square, and a plurality of shaft holes (111) are formed in the central part (11);

the peripheral portion (12) comprises secondary connecting pieces (121) connected with the central portion (11) and capable of being selectively separated from the central portion (11), and a secondary shaft hole (122) is formed in the end portion of each secondary connecting piece (121).

2. The pressurized patella locking plate according to claim 1, wherein: the shaft holes (111) are arranged in a rectangular array and are positioned in the shaft holes (111) at the edge of the central part (11), and any two adjacent shaft holes (111) are connected through a strip-shaped connecting piece (112); the shaft holes (111) are positioned at the non-edge of the central part (11) and are connected with the adjacent shaft holes (111) through transverse connecting sheets (112); so that the remaining area of the central part (11) forms a hollow (113).

3. The pressurized patella locking plate according to claim 1, wherein: the number of the shaft holes (111) is at least 12, the number of the shaft holes (111) in each row is three, and the number of the shaft holes (111) in each column is four.

4. The pressurized patella locking plate according to claim 2 or 3, wherein: the auxiliary connecting piece (121) is connected with the shaft hole (111) at the edge of the central part (11).

5. The pressurized patella locking plate according to claim 2 or 3, wherein: the shaft holes (111) positioned at two side edges of the edge of the central part (11) are connected with auxiliary connecting sheets (121); the shaft holes (111) positioned at the upper edge and the lower edge of the central part (11) are alternately connected with auxiliary connecting sheets (121) in a staggered way.

6. The compression patellar locking plate according to claim 1, wherein: the thickness of the patellar plate body (1) is 1.3 +/-0.1 mm.