CN205339088U - Tibial plateau fracture closes nodal section restorer - Google Patents

Abstract

The utility model discloses a tibial plateau fracture closes nodal section restorer, attacking head including the stainless steel, the connecting rod, extension bar and rubber handle, first end facade of strike of cube is processed into the oblique plane of standing that is 45 degrees contained angles with cube infusion set, be abound with the graininess arch on the oblique plane immediately, be equipped with in -band screw thread counter bore round boss with the oblique upright planar center of the right other end of plane phase of standing, screw thread fit connection stainless steel arc or straight connecting rod in the screw thread counter bore, another end screw thread connection handle connecting rod of arc or straight connecting rod, handle connecting rod fixed connection cylinder rubber handle. The utility model discloses through threaded connection between each parts, simple structure connects simply, and the matched stack form is abundant, and the pass nodal section to the tibial plateau fracture different zone that can be convenient carries out abundant accurate restoring to the throne, has great clinical spreading value and application prospect.

Description

A tibial plateau fracture articular surface reduction device

Technical field

The utility model relates to the field of medical equipment, in particular to a tibial plateau fracture articular surface resetter.

Background technique

Tibial plateau fracture is an important part and difficult point of knee joint fracture, which has a great influence on the function and stability of knee joint. It accounts for 1% of all fractures and 8% of fractures in the elderly, and can lead to varying degrees of compression and displacement of the articular surfaces. Among them, the involvement of the lateral platform is the most common, accounting for 55%-70%, the pure medial platform injury accounts for 10%-23%, and the involvement of the bicondyle is 10%-30%. Tibial plateau fractures are mostly medium- and high-energy injuries, mostly caused by strong axial stress combined with valgus or varus stress, which can lead to split fractures, collapse fractures, or both.

The goal of treatment for tibial plateau fractures is to achieve a stable, well-aligned, well-mobilized, pain-free knee while minimizing the risk of post-traumatic arthritis, which is a challenging issue. Ideal knee function depends on joint stability, good apposition, and normal articular surfaces to allow balanced load transfer through the knee joint, all of which are closely related to the reduction of articular surface collapse and displacement after fracture. At present, most tibial plateau fractures are mainly treated by surgery, and the reduction of the collapsed articular surface is very important. Anatomic reduction and stable fixation of the articular surface of tibial plateau fractures can restore the apposition relationship and stability of the joint to allow early mobility of the knee joint while maximizing the joint contact area to reduce the risk of post-traumatic arthritis. The collapse reduction of the tibial plateau fracture articular surface generally uses a percussion-type reducer. The striking head of the reducer is pressed against the subchondral bone part of the articular surface from below, and the bottom of the handle of the reducer is hit with a hammer, and the planar vibration of the striking head is used. Make the fracture articular surface collapse and reset. However, most of the existing articular surface reducers are one-piece or single-angle percussion head planes. For the reduction of articular surface collapse in different areas of the tibial plateau, there are disadvantages such as inconvenient operation and difficult reset, resulting in insufficient reduction and cannot satisfy all joints. The reduction of the facial area is difficult to achieve the expected therapeutic effect. Therefore, it is urgent in this technical field to develop a new modular, multi-angle tibial plateau fracture articular surface reducer for the articular surfaces in different regions of the tibial plateau to provide easy, sufficient and accurate reduction for the collapsed articular surface. It is an important issue that needs to be solved, and has great clinical promotion value and application prospect.

Contents of the invention

The purpose of the utility model is to provide a tibial plateau fracture articular surface resetter which is simple to operate, convenient to use, and can be flexibly assembled into a multi-angle striking head.

In order to achieve the above object, the utility model adopts the technical scheme of the following structure: a tibial plateau fracture articular surface resetter, comprising a striking head, a connecting rod, an extension rod and a handle, characterized in that the striking head is a stainless steel flat cube, One flat end vertical plane is processed into an oblique vertical plane at an angle of 45 degrees to the horizontal centerline of the flat cube, and the oblique vertical plane is covered with granular protrusions to form an uneven oblique plane. The center of the vertical plane is provided with a circular boss, and the center of the boss is provided with a concentric internal thread counterbore, forming a 45-degree angle striking head; the threaded counterbore internal thread on the 45-degree angle striking head is matched with a stainless steel arc connecting rod or flat The other end of the straight connecting rod, curved connecting rod or straight connecting rod is connected to the stainless steel handle extension rod through the stainless steel nut thread, and the other end of the handle extension rod is directly fixed and connected to the cylindrical stainless steel handle made of rubber material on the surface. The groove parallel to the longitudinal direction of the body constitutes the tibial plateau fracture articular surface reducer.

The oblique vertical planes of the 45-degree included angle of the above-mentioned striking head are respectively processed into oblique vertical planes of 45, 60, 75 degrees and vertical planes of 90 degrees to form four striking angles of 45 degrees, 60 degrees, 75 degrees and 90 degrees. head.

The radius of curvature of the above-mentioned curved connecting rod is 154.55 mm, and the arc is 30 degrees.

The working principle of the utility model is that by selecting striking heads with different angles, different types of connecting rods and handles, a series of reset devices with different angles, different lengths, straight or arc shapes are formed; Uneven fine particles can increase the friction between the striking surface and the articular subchondral bone, thereby preventing relative sliding during the striking reset process. The striking head can be connected with an arc-shaped or straight connecting rod through threads, or directly connected with the handle connecting rod , flexibly adjust the working length of the resetter; the arc connecting rod or straight connecting rod can be matched with different angles of the striking head, and the striking angle of the striking head can be easily changed to hit different parts of the fracture area, among which the arc connecting rod is especially It is suitable for the reduction of the articular surface in front of the tibial plateau; the stainless steel handle made of rubber on the surface can meet the strength required during the percussion reduction process, and can withstand high temperature steam sterilization, meeting the requirements of orthopedic surgical instruments. The parallel grooves on the handle can Increase the friction between the operator's palm and the handle to prevent the operator's hand from slipping during the blow reset process.

The parts of the utility model are connected by threads, the structure is simple, the connection is simple, the operation is simple, and the assembly forms are rich, and the articular surfaces in different areas of the tibial plateau fracture can be easily and fully and accurately reset, and can be used in general The traditional open reduction and internal fixation operation and various minimally invasive operations for tibial plateau fractures have achieved the purpose of the invention.

Description of drawings

Fig. 1 is the structural representation of the utility model arc bar connection

Figure 2 is a schematic diagram of the structure of the 45-degree striking head

Figure 3 is a schematic diagram of the concave-convex slope in Figure 2

Figure 4 is a schematic diagram of the structure of the arc connecting rod

Figure 5 is a structural schematic diagram of the handle

Figure 6 is a structural schematic diagram of a 60-degree striking head

Figure 7 is a structural schematic diagram of a 75-degree striking head

Figure 8 is a structural schematic diagram of a 90-degree striking head

Fig. 9 is a structural schematic diagram of the straight rod connection of the utility model

detailed description

The utility model is further described below in conjunction with the accompanying drawings, a tibial plateau fracture articular surface resetter, comprising a striking head 1, a connecting rod 2, a nut 3, an extension rod 4 and a handle 5, and the striking head 1 is a flat cube of stainless steel, One flat end vertical plane is processed into an oblique vertical plane at an angle of 45 degrees to the horizontal centerline of the oblate cube, and the oblique vertical plane is covered with granular protrusions 7 to form an uneven oblique plane. The center of the vertical plane of the flat end is provided with a circular boss 6, and the center of the boss 6 is provided with a concentric internal thread counterbore, forming a 45-degree angle striking head 1; the threaded counterbore internal thread on the 45-degree angle striking head 1 cooperates to connect the stainless steel arc Shaped connecting rod 2, the other end of arc-shaped connecting rod 2 is threaded with stainless steel handle extension rod 4 through stainless steel nut 3, the other end of handle extension rod 4 is directly fixed and connected to a cylindrical stainless steel handle 5 with a rubber material surface, and the outer surface of the handle has multiple strips A groove 8 parallel to the longitudinal direction of the cylinder.

The oblique vertical planes of the above-mentioned 45-degree angle striking head 1 are respectively processed into oblique vertical planes of 60 and 75 degrees and vertical planes of 90 degrees to form four striking heads with angles of 45 degrees, 60 degrees, 75 degrees and 90 degrees. 1.

The arc curvature radius of the arc connecting rod 2 is 154.55mm, and the arc is 30 degrees; the arc connecting rod 2 can also be replaced with a straight connecting rod.

Claims (4)

1. a fracture of the tibial plateau articular surface positor, including attacking head (1), connecting rod (2), nut (3) extension bar (4) and handle (5), it is characterized in that: attacking head (1) is one piece of stainless flat cube, one vertical plane machining Cheng Yubian cube horizontal center line of flat end is the tiltedly vertical plane of 45 degree of angles, tiltedly in vertical plane, processing is abound with graininess projection (7), constitute uneven tapered plane, the center of the vertical plane of another flat end relative with tiltedly vertical plane is provided with circular bosses (6), boss (6) center is provided with concentric female thread counterbore, constitute 45 degree of angle attacking heads (1)；Screw-threaded counterbore screw-internal thread fit on 45 degree of angle attacking heads (1) connects rustless steel arc-shaped connecting rod (2), arc-shaped connecting rod (2) other end passes through the threaded stainless steel handle extension bar (4) of rustless steel nut (3), handle, extension rod (4) other end is directly fixing connects the cylinder stainless steel handle (5) that surface is quality of rubber materials, and handle outer surface has a plurality of groove (8) parallel longitudinal with cylinder.

2. fracture of the tibial plateau articular surface positor according to claim 1, it is characterized in that: the tiltedly vertical plane of described 45 degree of angle attacking heads (1), it is processed into the tiltedly vertical plane of 45,60,75 and the vertical plane of 90 degree respectively, constitutes four attacking heads (1) of 45,60 degree, 75 degree and an angle of 90 degrees.

3. fracture of the tibial plateau articular surface positor according to claim 1, it is characterised in that: the arc curvature radius of described arc-shaped connecting rod (2) is 154.55mm, and radian is 30 degree.

4. fracture of the tibial plateau articular surface positor according to claim 1, it is characterised in that: described arc-shaped connecting rod (2) replaces with straight connecting rod.